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extract playing the game and the manual from main
add a basic manual
2024-01-23 09:56:31 +01:00 · 2024-01-22 20:47:35 +01:00 · 2024-01-19 10:39:15 +01:00 · 2024-01-19 10:39:05 +01:00 · 2024-01-19 10:10:52 +01:00 · 2024-01-14 13:31:40 +01:00
13 changed files with 2198 additions and 217 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
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+checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
+
 [[package]]
 name = "zerocopy"
 version = "0.7.19"
@@ -459,5 +825,5 @@ checksum = "56feebc4664bdb37f39c0b1b8fc8fa2f5648e3ec5f9cf4344978b4b7ca561fff"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn",
+ "syn 2.0.38",
 ]
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,5 +6,9 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

 [dependencies]
-ratatui = "0.24.0"
+ratatui = "0.25.0"
 crossterm = "0.27.0"
+rand = "0.8.5"
+petgraph = "0.6.4"
+whoami = "1.4.1"
+clap = { version = "4.4.11", features = ["derive"] }
--- a/build.rs
+++ b/build.rs
@@ -0,0 +1,7 @@
+use std::process::Command;
+
+fn main() {
+    let output = Command::new("git").args(&["rev-parse", "--short",  "HEAD"]).output().unwrap();
+    let git_hash = String::from_utf8(output.stdout).unwrap();
+    println!("cargo:rustc-env=GIT_HASH={}", git_hash);
+}
--- a/src/artifacts.rs
+++ b/src/artifacts.rs
@@ -1,12 +1,17 @@
-use crate::position::Position;
+use ratatui::style::Color;
+
 use crate::player::Player;
+use crate::position::Position;

 pub trait Artifact {
    //! An artifact that can be collected by the player
+    fn get_representation(&self) -> (&str, Color);
    /// get the position of the artifact in the level
    fn get_immutable_position(&self) -> &Position;
    /// call to apply the effects of the artifact to the player
-    fn collect(&mut self, player: &mut Player);
+    fn collect(&mut self, player: &mut Player, messages: &mut Vec<String>);
+    /// returns if the artifact was collected and can be removed from the level
+    fn was_collected(&self) -> bool;
 }

 pub struct Chest {
@@ -17,19 +22,30 @@ pub struct Chest {

 impl Chest {
    pub fn new(position: Position) -> Self {
+        let level = position.get_level();
        Self {
            position,
-            gold: 10,
+            // TODO maybe randomize this?
+            gold: (level + 1) * 10,
        }
    }
 }

 impl Artifact for Chest {
+    fn get_representation(&self) -> (&str, Color) {
+        ("C", Color::Blue)
+    }
+
    fn get_immutable_position(&self) -> &Position { &self.position }
-    fn collect(&mut self, player: &mut Player) {
+    fn collect(&mut self, player: &mut Player, messages: &mut Vec<String>) {
        player.retrieve_gold(self.gold);
+        messages.insert(0, format!("opened chest and collected {} gold.", self.gold).to_string());
        self.gold = 0;
    }
+
+    fn was_collected(&self) -> bool {
+        self.gold == 0
+    }
 }

 pub struct Potion {
@@ -48,9 +64,24 @@ impl Potion {
 }

 impl Artifact for Potion {
+    fn get_representation(&self) -> (&str, Color) {
+        ("P", Color::Green)
+    }
    fn get_immutable_position(&self) -> &Position { &self.position }
-    fn collect(&mut self, player: &mut Player) {
-        player.change_life(self.health.try_into().unwrap());
-        self.health = 0;
+    fn collect(&mut self, player: &mut Player, messages: &mut Vec<String>) {
+        // only consume potion of the player can gain at least one health point
+        if !player.is_healthy() {
+            let old = player.get_life();
+            player.increase_life(self.health.try_into().unwrap());
+            let new = player.get_life();
+            messages.insert(0, format!("picked up potion and gained {} hp.", new - old).to_string());
+            self.health = 0;
+        } else {
+            messages.insert(0, "not using the potion because you're healthy.".to_string());
+        }
+    }
+
+    fn was_collected(&self) -> bool {
+        self.health == 0
    }
 }
--- a/src/dungeon_slayer.rs
+++ b/src/dungeon_slayer.rs
@@ -0,0 +1,150 @@
+use rand::Rng;
+
+
+pub fn do_challenge(stat: u8) -> (bool, u8) {
+    if stat <= 20 {
+        let mut rng = rand::thread_rng();
+        let dice_roll = rng.gen_range(1..21);
+        return match dice_roll {
+            20 => { (false, 0) }
+            1 => { (true, dice_roll) }
+            _ => {
+                if dice_roll <= stat {
+                    (true, stat - dice_roll)
+                } else {
+                    (false, 0)
+                }
+            }
+        };
+    }
+    (false, 0)
+}
+
+#[allow(dead_code)]
+pub struct PlayerStats {
+    // dungeon slayer attributes
+    pub(crate) body: u8,
+    pub(crate) agility: u8,
+    pub(crate) mind: u8,
+
+    // dungeon slayer properties
+    //  for body
+    pub(crate) strength: u8,
+    pub(crate) toughness: u8,
+    //  for agility
+    pub(crate) movement: u8,
+    pub(crate) dexterity: u8,
+    // for mind
+    pub(crate) wisdom: u8,
+    // TODO maybe the wrong translation of Verstand
+    pub(crate) aura: u8,
+}
+
+impl PlayerStats {
+    /// create random values for the 3 attributes of the dungeon slayer character
+    /// Each attribute is between 4 and 8, not over 20 in sum.
+    fn create_random_attributes() -> (u8, u8, u8) {
+        let mut values: [u8; 3] = [8, 8, 8];
+        let mut rng = rand::thread_rng();
+        while values[0] + values[1] + values[2] > 20 {
+            let i = rng.gen_range(0..3);
+            values[i] = values[i].saturating_sub(1);
+        }
+        (values[0], values[1], values[2])
+    }
+
+    /// create random values for the 6 properties of the dungeon slayer character
+    /// Each property is between 0 and 4, not over 8 in sum.
+    fn create_random_properties() -> (u8, u8, u8, u8, u8, u8) {
+        let mut values: [u8; 6] = [4, 4, 4, 4, 4, 4];
+        let mut rng = rand::thread_rng();
+        while values[0] + values[1] + values[2] + values[3] + values[4] + values[5] > 8 {
+            let i = rng.gen_range(0..6);
+            values[i] = values[i].saturating_sub(1);
+        }
+        (values[0], values[1], values[2], values[3], values[4], values[5])
+    }
+
+    /// create a set of player stats containing attributes and properties according to the
+    /// dungeon slayer rules.
+    pub fn create_random() -> PlayerStats {
+        let attributes = PlayerStats::create_random_attributes();
+        let properties = PlayerStats::create_random_properties();
+        PlayerStats {
+            body: attributes.0,
+            agility: attributes.1,
+            mind: attributes.2,
+            strength: properties.0,
+            toughness: properties.1,
+            movement: properties.2,
+            dexterity: properties.3,
+            wisdom: properties.4,
+            aura: properties.5,
+        }
+    }
+
+    /// calculate the max life based on this player stats.
+    pub fn get_max_life(&self) -> u8 {
+        self.body + self.toughness + 10
+    }
+    pub fn get_defense(&self) -> u8 {
+        self.body + self.toughness // TODO + self.armor
+    }
+    pub fn get_hit(&self) -> u8 {
+        self.body + self.strength // TODO + self.weapon
+    }
+}
+
+#[allow(dead_code)]
+pub struct MonsterStats {
+    // dungeon slayer attributes
+    pub(crate) body: u8,
+    pub(crate) agility: u8,
+    pub(crate) mind: u8,
+
+    // dungeon slayer properties
+    //  for body
+    pub(crate) strength: u8,
+    pub(crate) toughness: u8,
+    //  for agility
+    pub(crate) movement: u8,
+    pub(crate) dexterity: u8,
+    // for mind
+    pub(crate) wisdom: u8,
+    // TODO maybe the wrong translation of Verstand
+    pub(crate) aura: u8,
+
+    pub(crate) max_life: u8,
+    pub(crate) defense: u8,
+    pub(crate) initiative: u8,
+    pub(crate) walk: u8,
+    pub(crate) hit: u8,
+    pub(crate) shoot: u8,
+    pub(crate) cast: u8,
+    pub(crate) targeted_cast: u8,
+}
+
+#[test]
+fn test_create_random_attributes() {
+    for _ in 0..1000 {
+        let attributes = PlayerStats::create_random_attributes();
+        assert!(attributes.0 <= 8);
+        assert!(attributes.1 <= 8);
+        assert!(attributes.2 <= 8);
+        assert_eq!(attributes.0 + attributes.1 + attributes.2, 20);
+    }
+}
+
+#[test]
+fn test_create_random_properties() {
+    for _ in 0..1000 {
+        let properties = PlayerStats::create_random_properties();
+        assert!(properties.0 <= 4);
+        assert!(properties.1 <= 4);
+        assert!(properties.2 <= 4);
+        assert!(properties.3 <= 4);
+        assert!(properties.4 <= 4);
+        assert!(properties.5 <= 4);
+        assert_eq!(properties.0 + properties.1 + properties.2 + properties.3 + properties.4 + properties.5, 8);
+    }
+}
--- a/src/game.rs
+++ b/src/game.rs
@@ -1,23 +1,287 @@
-use crate::level::Level;
+use crate::dungeon_slayer::do_challenge;
+#[cfg(test)]
+use crate::dungeon_slayer::PlayerStats;
+use crate::level::{Level, StructureElement};
+use crate::level_generator::LevelGenerator;
 use crate::player::Player;
+use crate::position::{HasPosition, Position};

-pub const LEVELS: usize = 2;
+pub const LEVELS: usize = 10;

-pub struct Game<'game> {
-    pub player: &'game mut Player,
-    pub levels: Vec<Level>,
+#[derive(PartialEq)]
+/// represents a state of a game
+pub enum GameState {
+    /// the game is ongoing (neither won or lost)
+    RUNNING,
+    /// the player died
+    LOST,
+    /// the player reached the Ω
+    WON,
 }

-impl Game<'_> {
-    pub fn new(p: &mut Player) -> Game {
+
+/// the main structure to hold all information about the ongoing game
+pub struct Game {
+    /// the player
+    player: Player,
+    /// the levels of the game
+    levels: Vec<Level>,
+    pub messages: Vec<String>,
+    use_fog_of_war: bool,
+}
+
+impl Game {
+    pub fn new(p: Player) -> Game {
        let mut v: Vec<Level> = Vec::with_capacity(LEVELS);
        for d in 0..LEVELS {
-            let l = Level::new(d);
-            v.push(l);
+            v.push(LevelGenerator::generate(d, d == 0, d == LEVELS - 1).render());
        }
-        Game {
+        let mut g = Game {
            player: p,
            levels: v,
+            messages: Vec::with_capacity(10),
+            use_fog_of_war: true,
+        };
+        let start = {
+            g.get_level(0).start
+        };
+        g.get_mutable_player().get_position().set(0, start.0, start.1);
+        g.get_mutable_level(0).discover(&Position::new(0, start.0, start.1));
+        g
+    }
+
+    /// returns true if the player is standing on the End element
+    fn player_reached_goal(&mut self) -> bool {
+        match self.next_element(0, 0) {
+            None => {}
+            Some(a) => {
+                match a {
+                    StructureElement::End => { return true; }
+                    _ => {}
+                }
+            }
+        };
+        false
+    }
+    /// returns the state of the game (depending on player's life and position)
+    pub fn get_game_state(&mut self) -> GameState {
+        if self.player.is_dead() {
+            return GameState::LOST;
+        }
+        if self.player_reached_goal() {
+            return GameState::WON;
+        }
+        GameState::RUNNING
+    }
+    pub fn get_player(&self) -> &Player {
+        &self.player
+    }
+    pub fn toggle_fog_of_war(&mut self) { self.use_fog_of_war = !self.use_fog_of_war; }
+    pub fn uses_fog_of_war(&self) -> bool { self.use_fog_of_war }
+    pub fn get_mutable_player(&mut self) -> &mut Player {
+        &mut self.player
+    }
+    pub fn get_level(&self, level: usize) -> &Level { &self.levels[level] }
+    pub fn get_mutable_level(&mut self, level: usize) -> &mut Level { &mut self.levels[level] }
+    /// check if the player can move in the given direction. This only checks for structure element
+    /// limitation as walls.
+    fn can_move(&mut self, dx: i16, dy: i16) -> bool {
+        let player_pos = &self.player.get_position();
+        let level = &mut self.levels[player_pos.get_level()];
+        level.can_player_move(&self.player, dx, dy)
+    }
+    /// returns the position (as tuple) of the next level's start point.
+    fn next_start(&self) -> (usize, usize, usize) {
+        let level = self.player.get_immutable_position().get_level() + 1;
+        let (x, y) = self.levels[level].start;
+        (level, x, y)
+    }
+    /// returns the position (as tuple) of the previous level's end point.
+    fn prev_end(&self) -> (usize, usize, usize) {
+        let level = self.player.get_immutable_position().get_level() - 1;
+        let (x, y) = self.levels[level].end;
+        (level, x, y)
+    }
+    /// get the next structure element sen from the player's position into the given direction.
+    fn next_element(&mut self, dx: i16, dy: i16) -> Option<StructureElement> {
+        let player_pos = &self.player.get_position();
+        let new_x: i16 = player_pos.get_x() as i16 + dx;
+        let new_y: i16 = player_pos.get_y() as i16 + dy;
+        let player_level = player_pos.get_level();
+        let level = &mut self.levels[player_level];
+        level.get_element(new_x, new_y, self.use_fog_of_war).0
+    }
+
+    /// move the game's player into the given direction. If on the target field there is a stair,
+    /// the player follows the stair up/down to the next level.
+    /// Discovery is performed on the new location of the player.
+    /// The returned value is the direction that will bring the player back to his original field.
+    pub fn move_player(&mut self, mut dx: i16, mut dy: i16) -> (i16, i16) {
+        // verify the player can do the move
+        if !self.can_move(dx, dy) {
+            return (-dx, -dy);
+        }
+
+        let player_pos = &self.player.get_position();
+        let mut player_level = player_pos.get_level();
+        let structure = self.next_element(dx, dy);
+
+        // use stairs if walked onto one
+        match structure {
+            Some(e) => {
+                match e {
+                    StructureElement::StairDown => {
+                        (dx, dy) = (0, 0);
+                        let (next_level, x, y) = self.next_start();
+                        player_level = next_level;
+                        self.messages.insert(0, format!("You climb down to level {}.", next_level));
+                        self.get_mutable_player().get_position().set(next_level, x, y);
+                    }
+                    StructureElement::StairUp => {
+                        (dx, dy) = (0, 0);
+                        let (next_level, x, y) = self.prev_end();
+                        player_level = next_level;
+                        self.messages.insert(0, format!("You climb up to level {}.", next_level));
+                        self.get_mutable_player().get_position().set(next_level, x, y);
+                    }
+                    _ => {}
+                }
+            }
+            _ => {}
+        }
+
+        // update position and discover area on new position
+        let (new_x, new_y) = self.get_mutable_player().get_position().change(dx, dy);
+        self.get_mutable_level(player_level).discover(&Position::new(player_level, new_x, new_y));
+        (-dx, -dy)
+    }
+    pub fn player_fights_monster(&mut self) -> bool {
+        let player_pos = &self.player.get_immutable_position();
+        let player_level = player_pos.get_level();
+        let level = &mut self.levels[player_level];
+        let (_, m, _) = level.get_element(player_pos.get_x() as i16, player_pos.get_y() as i16, true);
+        match m {
+            None => {}
+            Some(m) => {
+                // Player attacks monster
+                let attack = do_challenge(self.player.player_stats.get_hit());
+                if attack.0 {
+                    let mut damage = attack.1;
+                    let defense = do_challenge(m.get_defense());
+                    if defense.0 {
+                        damage = damage.saturating_sub(defense.1);
+                    }
+                    self.messages.insert(0, format!("Attack on {} successful with {} damage.", m.get_name(), damage).to_string());
+                    m.decrease_life(damage as usize);
+                } else {
+                    self.messages.insert(0, format!("Attack on {} failed.", m.get_name()).to_string());
+                }
+                // monster died, player gains experience
+                if m.is_dead() {
+                    self.player.gain_experience(m.get_experience_gain());
+                    self.messages.insert(0, format!("You killed the {}.", m.get_name()).to_string());
+                }
+                return m.is_dead();
+            }
+        };
+        true
+    }
+    pub fn player_collects_artifact(&mut self) {
+        let player_pos = &self.player.get_immutable_position();
+        let player_level = player_pos.get_level();
+        let level = &mut self.levels[player_level];
+        let (_, _, a) = level.get_element(player_pos.get_x() as i16, player_pos.get_y() as i16, true);
+        match a {
+            None => {}
+            Some(a) => {
+                a.collect(&mut self.player, &mut self.messages);
+            }
        }
    }
+    /// updates the player's current level. This will remove collected artifacts and dead monsters.
+    /// ticks is measuring the progress of the game even if the player is not moving, player_moved
+    /// indicates the player moved
+    pub fn update_level(&mut self, ticks: u128, player_moved: bool) {
+        let player_pos = &self.player.get_immutable_position();
+        let player_level = player_pos.get_level();
+        let level = &mut self.levels[player_level];
+        level.update(ticks, player_moved, &mut self.player, &mut self.messages);
+    }
+}
+
+#[test]
+fn game_has_correct_number_of_levels() {
+    let player_stats = PlayerStats {
+        body: 8,
+        agility: 8,
+        mind: 4,
+        strength: 3,
+        toughness: 3,
+        movement: 1,
+        dexterity: 1,
+        wisdom: 0,
+        aura: 0,
+    };
+    let p = Player::new("foo", player_stats);
+    let g = Game::new(p);
+    assert_eq!(g.levels.len(), LEVELS);
+}
+
+#[test]
+fn game_has_player() {
+    let player_stats = PlayerStats {
+        body: 8,
+        agility: 8,
+        mind: 4,
+        strength: 3,
+        toughness: 3,
+        movement: 1,
+        dexterity: 1,
+        wisdom: 0,
+        aura: 0,
+    };
+    let p = Player::new("foo", player_stats);
+    let g = Game::new(p);
+    assert_eq!(g.get_player().get_name(), "foo");
+    assert_eq!(g.get_player().get_immutable_position().get_level(), 0);
+}
+
+#[test]
+fn game_has_mutable_player() {
+    let player_stats = PlayerStats {
+        body: 8,
+        agility: 8,
+        mind: 4,
+        strength: 3,
+        toughness: 3,
+        movement: 1,
+        dexterity: 1,
+        wisdom: 0,
+        aura: 0,
+    };
+    let p = Player::new("foo", player_stats);
+    let mut g = Game::new(p);
+    assert_eq!(g.get_player().get_name(), "foo");
+    g.get_mutable_player().decrease_life(1);
+    assert_eq!(g.get_player().get_life(), 20);
+}
+
+#[test]
+fn game_get_level() {
+    let player_stats = PlayerStats {
+        body: 8,
+        agility: 8,
+        mind: 4,
+        strength: 3,
+        toughness: 3,
+        movement: 1,
+        dexterity: 1,
+        wisdom: 0,
+        aura: 0,
+    };
+    let p = Player::new("foo", player_stats);
+    let mut g = Game::new(p);
+    g.get_level(0);
+    assert_ne!(g.get_level(0).start, (0, 0));
+    g.get_mutable_level(0).discover(&Position::new(0, 1, 1));
 }
--- a/src/level.rs
+++ b/src/level.rs
@@ -1,6 +1,14 @@
 use std::cmp::{max, min};
-use crate::artifacts::{Artifact, Chest, Potion};
+
+#[cfg(test)]
+use crate::artifacts::{Chest, Potion};
+use crate::artifacts::Artifact;
+use crate::dungeon_slayer::do_challenge;
+#[cfg(test)]
+use crate::monster::{Orc, Rat};
 use crate::monster::Monster;
+use crate::player::Player;
+use crate::position::HasPosition;
 use crate::position::Position;

 pub const LEVEL_WIDTH: usize = 50;
@@ -8,6 +16,8 @@ pub const LEVEL_HEIGHT: usize = 25;

 #[derive(Copy, Clone, Debug, PartialEq)]
 pub enum StructureElement {
+    Start,
+    End,
    Wall,
    Floor,
    StairDown,
@@ -16,30 +26,19 @@ pub enum StructureElement {
 }

 pub struct Level {
-    level: usize,
-    structure: [[StructureElement; LEVEL_HEIGHT]; LEVEL_WIDTH],
-    discovered: [[bool; LEVEL_HEIGHT]; LEVEL_WIDTH],
-    monsters: Vec<Monster>,
-    artifacts: Vec<Box<dyn Artifact>>,
+    pub(crate) level: usize,
+    pub(crate) structure: [[StructureElement; LEVEL_HEIGHT]; LEVEL_WIDTH],
+    pub(crate) discovered: [[bool; LEVEL_HEIGHT]; LEVEL_WIDTH],
+    pub(crate) monsters: Vec<Box<dyn Monster>>,
+    pub(crate) artifacts: Vec<Box<dyn Artifact>>,
+    /// the position of the start in the level (either stair up or start point)
+    pub(crate) start: (usize, usize),
+    /// the position of the end in the level (either stair down or end point)
+    pub(crate) end: (usize, usize),
 }

 impl Level {
-    pub fn new(level: usize) -> Level {
-        let mut s = [[StructureElement::Wall; LEVEL_HEIGHT]; LEVEL_WIDTH];
-        for x in 2..LEVEL_WIDTH - 2 {
-            for y in 2..LEVEL_HEIGHT - 2 {
-                s[x][y] = StructureElement::Floor;
-            }
-        }
-        Level {
-            level,
-            structure: s,
-            discovered: [[false; LEVEL_HEIGHT]; LEVEL_WIDTH],
-            monsters: Vec::with_capacity(10),
-            artifacts: Vec::with_capacity(10),
-        }
-    }
-    pub fn get_element(&mut self, x: i16, y: i16) -> (Option<StructureElement>, Option<&mut Monster>, Option<&mut Box<(dyn Artifact + 'static)>>) {
+    pub fn get_element(&mut self, x: i16, y: i16, use_fog_of_war: bool) -> (Option<StructureElement>, Option<&mut Box<(dyn Monster + 'static)>>, Option<&mut Box<(dyn Artifact + 'static)>>) {
        if x < 0 || y < 0 {
            return (None, None, None);
        }
@@ -48,11 +47,11 @@ impl Level {
        if x >= LEVEL_WIDTH || y >= LEVEL_HEIGHT {
            return (None, None, None);
        }
-        if !self.discovered[x][y] {
+        if use_fog_of_war && !self.discovered[x][y] {
            return (Some(StructureElement::Unknown), None, None);
        }
        let search_pos = &Position::new(self.level, x, y);
-        let mut res_m: Option<&mut Monster> = None;
+        let mut res_m: Option<&mut Box<dyn Monster>> = None;
        for m in &mut self.monsters {
            if m.get_immutable_position() == search_pos {
                res_m = Some(m);
@@ -66,58 +65,6 @@ impl Level {
        }
        (Some(self.structure[x][y]), res_m, res_a)
    }
-    pub fn add_monster(&mut self, mut monster: Monster) -> Result<(), String> {
-        if self.level != monster.get_position().get_level() {
-            return Err("Wrong Level".to_string());
-        }
-        for m in &mut self.monsters {
-            if m.get_position() == monster.get_position() {
-                return Err("Position already used".to_string());
-            }
-        }
-        self.monsters.push(monster);
-        Ok(())
-    }
-
-    pub fn remove_dead_monster(&mut self, position: &Position) -> Result<(), String> {
-        if self.level != position.get_level() {
-            return Err("Wrong Level".to_string());
-        }
-        for (index, m) in &mut self.monsters.iter().enumerate() {
-            if m.get_immutable_position() == position {
-                if !m.is_dead() {
-                    return Err("Monster not dead".to_string());
-                }
-                self.monsters.remove(index);
-                break;
-            }
-        }
-        Ok(())
-    }
-    pub fn add_artifact(&mut self, artifact: impl Artifact + 'static) -> Result<(), String> {
-        if self.level != artifact.get_immutable_position().get_level() {
-            return Err("Wrong Level".to_string());
-        }
-        for a in &mut self.artifacts {
-            if a.get_immutable_position() == artifact.get_immutable_position() {
-                return Err("Position already used".to_string());
-            }
-        }
-        self.artifacts.push(Box::new(artifact));
-        Ok(())
-    }
-    pub fn remove_artifact(&mut self, position: &Position) -> Result<(), String> {
-        if self.level != position.get_level() {
-            return Err("Wrong Level".to_string());
-        }
-        for (index, a) in &mut self.artifacts.iter().enumerate() {
-            if a.get_immutable_position() == position {
-                self.monsters.remove(index);
-                break;
-            }
-        }
-        Ok(())
-    }
    /// discover the area with in the level around the given position
    pub fn discover(&mut self, pos: &Position) {
        let x = pos.get_x();
@@ -162,47 +109,170 @@ impl Level {
            }
        }
    }
+    pub fn update(&mut self, ticks: u128, player_moved: bool, player: &mut Player, messages: &mut Vec<String>) {
+        for (index, a) in &mut self.artifacts.iter().enumerate() {
+            if a.was_collected() {
+                self.artifacts.remove(index);
+                break;
+            }
+        }
+        for index in 0..self.monsters.len() {
+            if self.monsters[index].is_dead() {
+                continue;
+            }
+            // if the player moved, the monsters move as well all the time
+            if !player_moved && ticks % self.monsters[index].get_ticks_between_steps() != 0 {
+                continue;
+            }
+            loop {
+                // calculate the direction the monster will try to walk
+                let (dx, dy) = self.monsters[index].get_next_move(&self, player.get_immutable_position());
+                if self.can_monster_move(self.monsters[index].as_ref(), dx, dy) {
+                    let (new_x, new_y) = self.monsters[index].get_position().change(dx, dy);
+                    if player.get_immutable_position().get_x() == new_x && player.get_immutable_position().get_y() == new_y {
+                        // TODO monster attacks
+                        let attack = do_challenge(self.monsters[index].get_hit());
+                        if attack.0 {
+                            let mut damage = attack.1;
+                            let defense = do_challenge(player.player_stats.get_defense());
+                            if defense.0 {
+                                damage = damage.saturating_sub(defense.1);
+                            }
+                            player.decrease_life(damage);
+                            if player.is_dead() {
+                                messages.insert(0, format!("Attack from {} killed you.", self.monsters[index].get_name()).to_string());
+                            } else {
+                                messages.insert(0, format!("Attack from {} successful with {} damage.", self.monsters[index].get_name(), damage).to_string());
+                            }
+                        } else {
+                            messages.insert(0, format!("Attack from {} failed.", self.monsters[index].get_name()).to_string());
+                        }
+                        if !player.is_dead() {
+                            self.monsters[index].get_position().change(-dx, -dy);
+                        }
+                    }
+                    break;
+                }
+            }
+        }
+        for (index, m) in &mut self.monsters.iter().enumerate() {
+            if m.is_dead() {
+                self.monsters.remove(index);
+                break;
+            }
+        }
+    }
+
+    pub fn can_monster_move(&self, agent: &dyn Monster, dx: i16, dy: i16) -> bool {
+        let agent_pos = agent.get_immutable_position();
+        let new_x: usize = (agent_pos.get_x() as i16 + dx) as usize;
+        let new_y: usize = (agent_pos.get_y() as i16 + dy) as usize;
+
+        // verify we cannot leave the playing field
+        if new_x >= LEVEL_WIDTH || new_y >= LEVEL_HEIGHT {
+            return false;
+        }
+
+        for index in 0..self.monsters.len() {
+            let pos = self.monsters[index].get_immutable_position();
+            if pos.get_x() == new_x && pos.get_y() == new_y { return false; }
+        }
+        self.structure[new_x][new_y] != StructureElement::Wall
+    }
+    pub fn can_player_move(&self, agent: &Player, dx: i16, dy: i16) -> bool {
+        let agent_pos = agent.get_immutable_position();
+        let new_x: usize = (agent_pos.get_x() as i16 + dx) as usize;
+        let new_y: usize = (agent_pos.get_y() as i16 + dy) as usize;
+
+        // verify we cannot leave the playing field
+        if new_x >= LEVEL_WIDTH || new_y >= LEVEL_HEIGHT {
+            return false;
+        }
+
+        self.structure[new_x][new_y] != StructureElement::Wall
+    }
+    #[cfg(test)]
+    pub fn new(level: usize) -> Level {
+        let mut s = [[StructureElement::Wall; LEVEL_HEIGHT]; LEVEL_WIDTH];
+        for x in 2..LEVEL_WIDTH - 2 {
+            for y in 2..LEVEL_HEIGHT - 2 {
+                s[x][y] = StructureElement::Floor;
+            }
+        }
+        Level {
+            level,
+            structure: s,
+            discovered: [[false; LEVEL_HEIGHT]; LEVEL_WIDTH],
+            monsters: Vec::with_capacity(10),
+            artifacts: Vec::with_capacity(10),
+            start: (0, 0),
+            end: (0, 0),
+        }
+    }
+    #[cfg(test)]
+    pub fn add_monster(&mut self, mut monster: impl Monster + 'static) -> Result<(), String> {
+        if self.level != monster.get_position().get_level() {
+            return Err("Wrong Level".to_string());
+        }
+        for m in &mut self.monsters {
+            if m.get_position() == monster.get_position() {
+                return Err("Position already used".to_string());
+            }
+        }
+        self.monsters.push(Box::new(monster));
+        Ok(())
+    }
+    #[cfg(test)]
+    pub fn add_artifact(&mut self, artifact: impl Artifact + 'static) -> Result<(), String> {
+        if self.level != artifact.get_immutable_position().get_level() {
+            return Err("Wrong Level".to_string());
+        }
+        for a in &mut self.artifacts {
+            if a.get_immutable_position() == artifact.get_immutable_position() {
+                return Err("Position already used".to_string());
+            }
+        }
+        self.artifacts.push(Box::new(artifact));
+        Ok(())
+    }
 }

 #[test]
 fn test_get_element() {
    let mut l = Level::new(0);
-    assert_eq!(l.get_element(-1, -1).0, None);
-    assert_eq!(l.get_element(0, 0).0.unwrap(), StructureElement::Unknown);
-    assert_eq!(l.get_element(LEVEL_WIDTH as i16 - 1, LEVEL_HEIGHT as i16 - 1).0.unwrap(), StructureElement::Unknown);
-    assert_eq!(l.get_element(LEVEL_WIDTH as i16, LEVEL_HEIGHT as i16).0, None);
+    assert_eq!(l.get_element(-1, -1, true).0, None);
+    assert_eq!(l.get_element(0, 0, true).0.unwrap(), StructureElement::Unknown);
+    assert_eq!(l.get_element(LEVEL_WIDTH as i16 - 1, LEVEL_HEIGHT as i16 - 1, true).0.unwrap(), StructureElement::Unknown);
+    assert_eq!(l.get_element(LEVEL_WIDTH as i16, LEVEL_HEIGHT as i16, true).0, None);
 }

 #[test]
 fn test_discover_get_element() {
    let mut l = Level::new(0);
-    assert_eq!(l.get_element(10, 10).0.unwrap(), StructureElement::Unknown);
+    assert_eq!(l.get_element(10, 10, true).0.unwrap(), StructureElement::Unknown);
    let p = Position::new(0, 10, 10);
    l.discover(&p);
-    assert_eq!(l.get_element(10, 10).0.unwrap(), StructureElement::Floor);
-    assert_eq!(l.get_element(9, 10).0.unwrap(), StructureElement::Floor);
-    assert_eq!(l.get_element(10, 9).0.unwrap(), StructureElement::Floor);
-    assert_eq!(l.get_element(11, 10).0.unwrap(), StructureElement::Floor);
-    assert_eq!(l.get_element(10, 11).0.unwrap(), StructureElement::Floor);
+    assert_eq!(l.get_element(10, 10, true).0.unwrap(), StructureElement::Floor);
+    assert_eq!(l.get_element(9, 10, true).0.unwrap(), StructureElement::Floor);
+    assert_eq!(l.get_element(10, 9, true).0.unwrap(), StructureElement::Floor);
+    assert_eq!(l.get_element(11, 10, true).0.unwrap(), StructureElement::Floor);
+    assert_eq!(l.get_element(10, 11, true).0.unwrap(), StructureElement::Floor);
 }

 #[test]
 fn test_discover_can_add_monster() {
    let mut l = Level::new(0);
-    let mut m = Monster::new(2);
-    m.get_position().set(1, 2, 3);
+    let m = Rat::new_with_position(Position::new(1, 2, 3));
    assert_eq!(l.add_monster(m), Err("Wrong Level".to_string()));

-    let mut m = Monster::new(2);
+    let mut m = Orc::new_with_position(Position::new(0, 2, 3));
    m.get_position().set(0, 2, 3);
    assert_eq!(l.add_monster(m), Ok(()));

-    let mut m = Monster::new(2);
-    m.get_position().set(0, 2, 3);
+    let m = Rat::new_with_position(Position::new(0, 2, 3));
    assert_eq!(l.add_monster(m), Err("Position already used".to_string()));

-    let mut m = Monster::new(2);
-    m.get_position().set(0, 2, 4);
+    let m = Rat::new_with_position(Position::new(0, 2, 4));
    assert_eq!(l.add_monster(m), Ok(()));
 }

@@ -227,21 +297,20 @@ fn test_discover_get_monster() {
    let mut l = Level::new(0);
    let p = Position::new(0, 10, 10);
    l.discover(&p);
-    assert_eq!(l.get_element(10, 10).0.unwrap(), StructureElement::Floor);
-    assert!(l.get_element(10, 10).1.is_none());
+    assert_eq!(l.get_element(10, 10, true).0.unwrap(), StructureElement::Floor);
+    assert!(l.get_element(10, 10, true).1.is_none());

-    let mut m = Monster::new(23);
-    m.get_position().set(0, 10, 10);
+    let m = Rat::new_with_position(Position::new(0, 10, 10));
    assert_eq!(l.add_monster(m), Ok(()));

-    let elem = l.get_element(10, 10);
+    let elem = l.get_element(10, 10, true);
    assert_eq!(elem.0.unwrap(), StructureElement::Floor);
    assert!(elem.1.is_some());
    let m = elem.1.unwrap();
-    assert_eq!(m.get_life(), 23);
+    assert_eq!(m.get_life(), 3);

-    m.decrease_life(2);
-    assert_eq!(l.get_element(10, 10).1.unwrap().get_life(), 21);
+    m.decrease_life(3);
+    assert_eq!(l.get_element(10, 10, true).1.unwrap().get_life(), 0);
 }

 #[test]
@@ -249,13 +318,13 @@ fn test_discover_get_artifact() {
    let mut l = Level::new(0);
    let p = Position::new(0, 10, 10);
    l.discover(&p);
-    assert_eq!(l.get_element(10, 10).0.unwrap(), StructureElement::Floor);
-    assert!(l.get_element(10, 10).2.is_none());
+    assert_eq!(l.get_element(10, 10, true).0.unwrap(), StructureElement::Floor);
+    assert!(l.get_element(10, 10, true).2.is_none());

    let a = Chest::new(Position::new(0, 10, 10));
    assert_eq!(l.add_artifact(a), Ok(()));

-    let elem = l.get_element(10, 10);
+    let elem = l.get_element(10, 10, true);
    assert_eq!(elem.0.unwrap(), StructureElement::Floor);
    assert!(elem.2.is_some());
 }
@@ -266,33 +335,15 @@ fn test_discover_get_monster_can_move() {
    let p = Position::new(0, 10, 10);
    l.discover(&p);

-    let mut m = Monster::new(23);
-    m.get_position().set(0, 10, 10);
+    let m = Rat::new_with_position(Position::new(0, 10, 10));
    l.add_monster(m).expect("Panic because of");

-    let m = l.get_element(10, 10).1.unwrap();
+    let m = l.get_element(10, 10, true).1.unwrap();
    m.get_position().change(1, 1);

-    let m = l.get_element(10, 10).1;
+    let m = l.get_element(10, 10, true).1;
    assert!(m.is_none());
-    let m = l.get_element(11, 11).1;
+    let m = l.get_element(11, 11, true).1;
    assert!(m.is_some());
-    assert_eq!(m.unwrap().get_life(), 23);
-}
-
-#[test]
-fn test_monster_can_be_removed() {
-    let mut level = Level::new(0);
-    level.discover(&Position::new(0, 10, 10));
-
-    let mut m = Monster::new(2);
-    m.get_position().set(0, 10, 10);
-    level.add_monster(m).expect("Panic because of");
-
-    let m = level.get_element(10, 10).1.unwrap();
-    m.decrease_life(3);
-
-    assert_eq!(level.remove_dead_monster(&Position::new(0, 10, 10)), Ok(()));
-
-    assert!(level.get_element(10, 10).1.is_none());
+    assert_eq!(m.unwrap().get_life(), 3);
 }
--- a/src/level_generator.rs
+++ b/src/level_generator.rs
@@ -0,0 +1,360 @@
+use std::cmp::{max, min};
+use std::ops::Range;
+
+use petgraph::algo::min_spanning_tree;
+use petgraph::data::*;
+use petgraph::graph::Graph;
+use petgraph::graph::UnGraph;
+use rand::prelude::SliceRandom;
+use rand::Rng;
+use rand::rngs::ThreadRng;
+
+use crate::artifacts::{Artifact, Chest, Potion};
+use crate::level::{Level, StructureElement};
+use crate::monster::{LowerDaemon, Monster, Rat};
+use crate::position::Position;
+
+const ROOMS_VERTICAL: usize = 7;
+const ROOMS_HORIZONTAL: usize = 4;
+
+const ROOM_WIDTH: usize = 7;
+const ROOM_HEIGHT: usize = 6;
+
+#[derive(PartialEq, Copy, Clone)]
+enum RoomType {
+    Start,
+    End,
+    StairUp,
+    StairDown,
+    BasicRoom,
+    TreasureRoom,
+    MonsterRoom,
+    EmptyRoom,
+}
+
+#[derive(Copy, Clone)]
+struct ConnectionInfo {
+    offset: usize,
+    distance: usize,
+}
+
+#[derive(Copy, Clone)]
+struct Room {
+    pub kind: RoomType,
+    pub offset_x: usize,
+    pub offset_y: usize,
+    pub width: usize,
+    pub height: usize,
+    pub connection_down: Option<ConnectionInfo>,
+    pub connection_right: Option<ConnectionInfo>,
+}
+
+impl Room {
+    fn new() -> Self {
+        Self {
+            kind: RoomType::EmptyRoom,
+            offset_x: 0,
+            offset_y: 0,
+            width: 0,
+            height: 0,
+            connection_down: None,
+            connection_right: None,
+        }
+    }
+    /// change the size and position of a room randomly within its bounds
+    fn random(&mut self, rng: &mut ThreadRng) {
+        let width = rng.gen_range(3..6);
+        let height = rng.gen_range(3..5);
+        self.width = width;
+        self.height = height;
+        self.offset_x = rng.gen_range(0..(ROOM_WIDTH - width));
+        self.offset_y = rng.gen_range(0..(ROOM_HEIGHT - height));
+    }
+    fn get_x_range(&self) -> Range<usize> {
+        self.offset_x..self.offset_x + self.width
+    }
+    fn get_y_range(&self) -> Range<usize> {
+        self.offset_y..self.offset_y + self.height
+    }
+}
+
+pub struct LevelGenerator {
+    rooms: [[Room; ROOMS_HORIZONTAL]; ROOMS_VERTICAL],
+    level: usize,
+}
+
+impl LevelGenerator {
+    pub fn generate(level: usize, first: bool, last: bool) -> Self {
+        let mut rng = rand::thread_rng();
+        let mut rooms = [[Room::new(); ROOMS_HORIZONTAL]; ROOMS_VERTICAL];
+        let mut graph = UnGraph::<(usize, usize), u16>::default();
+
+        // trick the room_connectable function into failing on the first iteration
+        rooms[0][0].kind = RoomType::BasicRoom;
+
+        while !LevelGenerator::rooms_connectable(&rooms) {
+            let mut room_types: Vec<RoomType> = Vec::with_capacity(ROOMS_HORIZONTAL * ROOMS_VERTICAL);
+            // level 0 contains a start room, all others contain a stair up
+            if first {
+                room_types.push(RoomType::Start);
+            } else {
+                room_types.push(RoomType::StairUp);
+            }
+            // level 24 (the last) contains an end room, all others a stair down
+            if last {
+                room_types.push(RoomType::End);
+            } else {
+                room_types.push(RoomType::StairDown);
+            }
+            room_types.push(RoomType::MonsterRoom);
+            room_types.push(RoomType::TreasureRoom);
+            // generate a random set of rooms and shuffle them
+            for _ in room_types.len()..ROOMS_HORIZONTAL * ROOMS_VERTICAL {
+                match rng.gen_range(1..=100) {
+                    // TODO tune room type distribution
+                    1..=33 => { room_types.push(RoomType::EmptyRoom) }
+                    34..=66 => { room_types.push(RoomType::TreasureRoom) }
+                    67..=90 => { room_types.push(RoomType::MonsterRoom) }
+                    _ => { room_types.push(RoomType::BasicRoom) }
+                }
+            }
+            room_types.shuffle(&mut rng);
+
+            graph.clear();
+            // place the rooms in the array an add nodes to the graph for every non empty room
+            for c in 0..ROOMS_VERTICAL {
+                for r in 0..ROOMS_HORIZONTAL {
+                    rooms[c][r].kind = room_types.pop().unwrap();
+                    if rooms[c][r].kind != RoomType::EmptyRoom {
+                        rooms[c][r].random(&mut rng);
+                        graph.add_node((c, r));
+                    }
+                }
+            }
+        }
+
+        // add edges to the graph connecting each room to all of its neighbours (max 4 of them)
+        for c in 0..ROOMS_VERTICAL {
+            for r in 0..ROOMS_HORIZONTAL {
+                if rooms[c][r].kind == RoomType::EmptyRoom {
+                    continue;
+                }
+                let src_index = graph.node_indices().find(|i| graph[*i] == (c, r)).unwrap();
+                for r_1 in r + 1..ROOMS_HORIZONTAL {
+                    if rooms[c][r_1].kind != RoomType::EmptyRoom {
+                        let tgt_index = graph.node_indices().find(|i| graph[*i] == (c, r_1)).unwrap();
+                        // todo use random weight for edge
+                        graph.add_edge(src_index, tgt_index, 1);
+                        break;
+                    }
+                }
+                for c_1 in c + 1..ROOMS_VERTICAL {
+                    if rooms[c_1][r].kind != RoomType::EmptyRoom {
+                        let tgt_index = graph.node_indices().find(|i| graph[*i] == (c_1, r)).unwrap();
+                        // todo use random weight for edge
+                        graph.add_edge(src_index, tgt_index, 1);
+                        break;
+                    }
+                }
+            }
+        }
+
+        // calculate a minimum spanning tree
+        let mst: Graph<(usize, usize), u16, petgraph::Undirected> = Graph::from_elements(min_spanning_tree(&graph));
+        for edge in mst.raw_edges() {
+            let src = mst[edge.source()];
+            let tgt = mst[edge.target()];
+
+            let src_room = rooms[src.0][src.1];
+            let mut tgt_room = rooms[tgt.0][tgt.1];
+
+            // cols are the same, either up or down
+            if src.0 == tgt.0 {
+                let range = LevelGenerator::range_overlap(src_room.get_x_range(), tgt_room.get_x_range());
+                let position: usize;
+                if range.is_empty() {
+                    position = range.start;
+                } else {
+                    position = rng.gen_range(range);
+                }
+                if src.1 < tgt.1 {
+                    // src to tgt
+                    rooms[src.0][src.1].connection_down = Some(ConnectionInfo { offset: position, distance: tgt.1 - src.1 });
+                } else {
+                    // tgt to src
+                    tgt_room.connection_down = Some(ConnectionInfo { offset: position, distance: src.1 - tgt.1 });
+                }
+            }
+            // rows are the same, either left or right
+            if src.1 == tgt.1 {
+                let range = LevelGenerator::range_overlap(src_room.get_y_range(), tgt_room.get_y_range());
+                let mut position: usize;
+                if range.is_empty() {
+                    position = range.start;
+                } else {
+                    position = rng.gen_range(range);
+                }
+                if src.1 == 0 && position == 0 {
+                    position = 1;
+                }
+                if src.0 < tgt.0 {
+                    // src to tgt
+                    rooms[src.0][src.1].connection_right = Some(ConnectionInfo { offset: position, distance: tgt.0 - src.0 });
+                } else {
+                    // tgt to src
+                    tgt_room.connection_right = Some(ConnectionInfo { offset: position, distance: src.1 - tgt.1 });
+                }
+            }
+        }
+
+        LevelGenerator {
+            rooms,
+            level,
+        }
+    }
+
+    fn range_overlap(r1: Range<usize>, r2: Range<usize>) -> Range<usize> {
+        max(r1.start, r2.start)..min(r1.end, r2.end)
+    }
+
+    /// Verifies that for a given matrix of rooms each room has at least one other room in the
+    /// same row or column.
+    fn rooms_connectable(rooms: &[[Room; ROOMS_HORIZONTAL]; ROOMS_VERTICAL]) -> bool {
+        for c in 0..ROOMS_VERTICAL {
+            for r in 0..ROOMS_HORIZONTAL {
+                if rooms[c][r].kind != RoomType::EmptyRoom {
+                    let mut connected = 0;
+                    for c1 in 0..ROOMS_VERTICAL {
+                        if rooms[c1][r].kind != RoomType::EmptyRoom {
+                            connected += 1;
+                        }
+                    }
+                    for r1 in 0..ROOMS_HORIZONTAL {
+                        if rooms[c][r1].kind != RoomType::EmptyRoom {
+                            connected += 1;
+                        }
+                    }
+                    if connected <= 2 {
+                        return false;
+                    }
+                }
+            }
+        }
+        return true;
+    }
+    pub fn render(&self) -> Level {
+        let mut rng = rand::thread_rng();
+        let mut structure = [[StructureElement::Wall; 1 + ROOMS_HORIZONTAL * ROOM_HEIGHT]; 1 + ROOMS_VERTICAL * ROOM_WIDTH];
+        let mut artifacts: Vec<Box<dyn Artifact>> = Vec::with_capacity(10);
+        let mut enemies: Vec<Box<dyn Monster>> = Vec::with_capacity(10);
+        let mut start_x: usize = 0;
+        let mut start_y: usize = 0;
+        let mut end_x: usize = 0;
+        let mut end_y: usize = 0;
+        for c in 0..ROOMS_VERTICAL {
+            for r in 0..ROOMS_HORIZONTAL {
+                let top = 1 + r * ROOM_HEIGHT;
+                let left = 1 + c * ROOM_WIDTH;
+                let room = self.rooms[c][r];
+                for x in 0..room.width {
+                    for y in 0..room.height {
+                        structure[left + room.offset_x + x][top + room.offset_y + y] = StructureElement::Floor;
+                    }
+                }
+                if room.kind == RoomType::TreasureRoom {
+                    let t_x = left + room.offset_x + rng.gen_range(0..room.width);
+                    let t_y = top + room.offset_y + rng.gen_range(0..room.height);
+                    // TODO randomize artifacts
+                    match rng.gen_range(1..=100) {
+                        1..=50 => { artifacts.push(Box::new(Chest::new(Position::new(self.level, t_x, t_y)))); }
+                        _ => { artifacts.push(Box::new(Potion::new(Position::new(self.level, t_x, t_y)))); }
+                    };
+                }
+                if room.kind == RoomType::MonsterRoom {
+                    let t_x = left + room.offset_x + rng.gen_range(0..room.width);
+                    let t_y = top + room.offset_y + rng.gen_range(0..room.height);
+                    // TODO randomize enemies here
+                    match rng.gen_range(1..=100) {
+                        1..=50 => {
+                            enemies.push(Box::new(LowerDaemon::new_with_position(Position::new(self.level, t_x, t_y))));
+                        }
+                        _ => {
+                            enemies.push(Box::new(Rat::new_with_position(Position::new(self.level, t_x, t_y))));
+                        }
+                    };
+                }
+
+                if room.kind == RoomType::End || room.kind == RoomType::StairDown {
+                    end_x = left + room.offset_x + rng.gen_range(0..room.width);
+                    end_y = top + room.offset_y + rng.gen_range(0..room.height);
+                }
+                if room.kind == RoomType::StairDown {
+                    structure[end_x][end_y] = StructureElement::StairDown;
+                }
+                if room.kind == RoomType::End {
+                    structure[end_x][end_y] = StructureElement::End;
+                }
+
+                if room.kind == RoomType::Start || room.kind == RoomType::StairUp {
+                    start_x = left + room.offset_x + rng.gen_range(0..room.width);
+                    start_y = top + room.offset_y + rng.gen_range(0..room.height);
+                }
+                if room.kind == RoomType::StairUp {
+                    structure[start_x][start_y] = StructureElement::StairUp;
+                }
+                if room.kind == RoomType::Start {
+                    structure[start_x][start_y] = StructureElement::Start;
+                }
+            }
+        }
+        //
+        for c in 0..ROOMS_VERTICAL {
+            for r in 0..ROOMS_HORIZONTAL {
+                let src_room = self.rooms[c][r];
+                if let Some(x_conn) = src_room.connection_down {
+                    let tgt_room = self.rooms[c][r + x_conn.distance];
+                    let top = 1 + r * ROOM_HEIGHT + src_room.offset_y;
+                    let left = 1 + c * ROOM_WIDTH + x_conn.offset;
+                    let bottom = 1 + (r + x_conn.distance) * ROOM_HEIGHT + tgt_room.offset_y + tgt_room.height;
+                    for i in top..bottom {
+                        if structure[left][i] == StructureElement::Wall {
+                            structure[left][i] = StructureElement::Floor;
+                        }
+                    }
+                }
+                if let Some(y_conn) = src_room.connection_right {
+                    let tgt_room = self.rooms[c + y_conn.distance][r];
+
+                    let top = 1 + r * ROOM_HEIGHT + src_room.offset_y + y_conn.offset - 1;
+                    let left = 1 + c * ROOM_WIDTH + src_room.offset_x;
+                    let right = 1 + (c + y_conn.distance) * ROOM_WIDTH + tgt_room.offset_x + tgt_room.width;
+                    for i in left..right {
+                        if structure[i][top] == StructureElement::Wall {
+                            structure[i][top] = StructureElement::Floor;
+                        }
+                    }
+                }
+            }
+        }
+        Level {
+            level: self.level,
+            structure,
+            discovered: [[false; 1 + ROOMS_HORIZONTAL * ROOM_HEIGHT]; 1 + ROOMS_VERTICAL * ROOM_WIDTH],
+            monsters: enemies,
+            artifacts,
+            start: (start_x, start_y),
+            end: (end_x, end_y),
+        }
+    }
+}
+
+#[test]
+fn test_level_gen() {
+    let level = LevelGenerator::generate(23, false, false).render();
+    assert_eq!(level.level, 23);
+    assert_ne!(level.start, (0, 0));
+    assert_ne!(level.end, (0, 0));
+    assert_ne!(level.start, level.end);
+    assert_ne!(level.monsters.len(), 0);
+    assert_ne!(level.artifacts.len(), 0);
+}
--- a/src/level_widget.rs
+++ b/src/level_widget.rs
@@ -0,0 +1,101 @@
+use ratatui::buffer::Buffer;
+use ratatui::layout::Rect;
+use ratatui::style::Color;
+use ratatui::widgets::{StatefulWidget, Widget};
+
+use crate::game::Game;
+use crate::level::StructureElement;
+use crate::position::HasPosition;
+
+const FG_BROWN: Color = Color::Rgb(186, 74, 0);
+
+pub struct LevelWidget {
+    use_fog_of_war: bool,
+}
+
+impl LevelWidget {
+    pub fn new(use_fog_of_war: bool) -> Self {
+        LevelWidget {
+            use_fog_of_war
+        }
+    }
+    fn set_cell(&self, buf: &mut Buffer, x: u16, y: u16, symbol: &str, fg: Color, bg: Color) {
+        buf.
+            get_mut(x, y).
+            set_symbol(symbol).
+            set_bg(bg).
+            set_fg(fg);
+    }
+}
+
+impl StatefulWidget for LevelWidget {
+    type State = Game;
+
+    fn render(self, area: Rect, buf: &mut Buffer, state: &mut Self::State) {
+        let al: u16 = area.left();
+        let at: u16 = area.top();
+
+        {
+            let player = state.get_mutable_player();
+            let player_pos = player.get_immutable_position();
+            let player_level = player_pos.get_level();
+
+            // draw the level elements
+            for x in al..area.right() {
+                for y in at..area.bottom() {
+                    let level = state.get_mutable_level(player_level);
+                    let level_x = (x - al) as i16;
+                    let level_y = (y - at) as i16;
+                    match level.get_element(level_x, level_y, self.use_fog_of_war) {
+                        (Some(structure_element), None, None) => {
+                            match structure_element {
+                                StructureElement::Start => {
+                                    self.set_cell(buf, x, y, "α", Color::Black, Color::Gray);
+                                }
+                                StructureElement::End => {
+                                    self.set_cell(buf, x, y, "Ω", Color::Black, Color::Gray);
+                                }
+                                StructureElement::Wall => {
+                                    // TODO add fancy walls
+                                    self.set_cell(buf, x, y, "#", FG_BROWN, Color::Gray);
+                                }
+                                StructureElement::Floor => {
+                                    self.set_cell(buf, x, y, " ", FG_BROWN, Color::Gray);
+                                }
+                                StructureElement::StairDown => {
+                                    self.set_cell(buf, x, y, ">", Color::Black, Color::Gray);
+                                }
+                                StructureElement::StairUp => {
+                                    self.set_cell(buf, x, y, "<", Color::Black, Color::Gray);
+                                }
+                                StructureElement::Unknown => {
+                                    self.set_cell(buf, x, y, "▒", Color::DarkGray, Color::Gray);
+                                }
+                            }
+                        }
+                        (_, Some(m), _) => {
+                            let (s, c) = m.get_representation();
+                            self.set_cell(buf, x, y, s, c, Color::Gray);
+                        }
+                        (_, _, Some(t)) => {
+                            let (s, c) = t.get_representation();
+                            self.set_cell(buf, x, y, s, c, Color::Gray);
+                        }
+                        (None, None, None) => {}
+                    };
+                }
+            }
+        }
+        {
+            let player = state.get_mutable_player();
+            let player_pos = player.get_immutable_position();
+            let player_x = al + player_pos.get_x() as u16;
+            let player_y = at + player_pos.get_y() as u16;
+            self.set_cell(buf, player_x, player_y, "8", Color::Red, Color::Gray);
+        }
+    }
+}
+
+impl Widget for LevelWidget {
+    fn render(self, _area: Rect, _buf: &mut Buffer) {}
+}
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,19 +1,298 @@
-use crate::game::Game;
+use std::cmp::min;
+use std::io::{Result, Stdout};
+use std::io::stdout;
+use std::string::ToString;
+use std::time::Instant;
+
+use clap::Parser;
+use crossterm::{
+    event::{self, KeyCode, KeyEventKind},
+    ExecutableCommand,
+    terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
+};
+use ratatui::{
+    prelude::{CrosstermBackend, Terminal},
+    widgets::Paragraph,
+};
+use ratatui::prelude::*;
+use ratatui::widgets::{Block, Borders, BorderType, Wrap};
+use ratatui::widgets::block::{Position, Title};
+use whoami::realname;
+
+use crate::dungeon_slayer::PlayerStats;
+use crate::game::{Game, GameState};
+use crate::level_widget::LevelWidget;
 use crate::player::Player;
+use crate::position::HasPosition;

 mod game;
 mod player;
 mod level;
 mod position;
-mod monster;
+mod level_widget;
+mod level_generator;
 mod artifacts;
+mod monster;
+mod dungeon_slayer;

-fn main() {
-    let mut p = Player::new("Teddy Tester", 10);
-    let g = Game::new(&mut p);
+/// length of a game frame in ms
+pub const FRAME_LENGTH: u64 = 100;

-    println!("{}",g.player.get_name());
-    println!("{}",g.player.get_life());
-    g.player.change_life(-1);
-    println!("{}",g.player.get_life());
+#[derive(Parser)]
+#[command(author, version, about = "A small game in the tradition of rogue.", long_about = None)]
+struct CliOptions {
+    #[arg(short, long, action)]
+    manual: bool,
+}
+
+//
+fn main() -> Result<()> {
+    let cli_options = CliOptions::parse();
+
+    stdout().execute(EnterAlternateScreen)?;
+    enable_raw_mode()?;
+    let mut terminal = Terminal::new(CrosstermBackend::new(stdout()))?;
+    terminal.clear()?;
+
+    if cli_options.manual {
+        show_manual(&mut terminal);
+    } else {
+        play_game(&mut terminal)?;
+    }
+
+    stdout().execute(LeaveAlternateScreen)?;
+    disable_raw_mode()?;
+    Ok(())
+}
+
+/// play the game ;)
+fn play_game(terminal: &mut Terminal<CrosstermBackend<Stdout>>) -> Result<()> {
+    let player_stats = PlayerStats::create_random();
+    let mut game = Game::new(Player::new(realname().as_str(), player_stats));
+    let start_time = Instant::now();
+    let mut ticks = 0;
+    loop {
+        terminal.draw(|frame| {
+            let mut area = frame.size();
+            frame.render_widget(Block::default().style(Style::default().bg(Color::Green)), area);
+
+            // don't draw stuff except an info box if the terminal is too small (less than 80x25)
+            // to prevent the read drawing code from crashing the game.
+            if area.width < 80 || area.height < 25 {
+                let block = Block::default()
+                    .title("Info")
+                    .borders(Borders::ALL)
+                    .border_style(Style::default().fg(Color::White))
+                    .border_type(BorderType::Rounded)
+                    .style(Style::default().bg(Color::Black));
+                let paragraph = Paragraph::new("Terminal needs to be at leas 80x25!")
+                    .block(block)
+                    .wrap(Wrap { trim: true });
+                frame.render_widget(paragraph, area);
+                return;
+            }
+
+            if area.width > 80 {
+                area.x = (area.width - 80) / 2;
+                area.width = 80;
+            }
+            if area.height > 25 {
+                area.y = (area.height - 25) / 2;
+                area.height = 25;
+            }
+
+            let map_area = Rect {
+                x: area.x,
+                y: area.y,
+                width: level::LEVEL_WIDTH as u16,
+                height: level::LEVEL_HEIGHT as u16,
+            };
+            frame.render_stateful_widget(LevelWidget::new(game.uses_fog_of_war()), map_area, &mut game);
+
+            let stats_area = Rect {
+                x: area.x + 50,
+                y: area.y,
+                width: 30,
+                height: 15,
+            };
+            let block = Block::default()
+                .title(
+                    Title::from(
+                        format!(" {} ", game.get_player().get_name()))
+                        .alignment(Alignment::Center)
+                        .position(Position::Top)
+                )
+                .borders(Borders::TOP)
+                .border_style(Style::default().fg(Color::White))
+                .border_type(BorderType::Rounded)
+                .style(Style::default().bg(Color::Blue));
+            frame.render_widget(
+                Paragraph::new(format!("Health: {}/{}\nExp: {}\nGold: {}\nLevel: {}",
+                                       game.get_player().get_life(),
+                                       game.get_player().get_max_life(),
+                                       game.get_player().get_experience(),
+                                       game.get_player().get_gold(),
+                                       game.get_player().get_immutable_position().get_level()))
+                    .block(block).wrap(Wrap { trim: true }),
+                stats_area,
+            );
+            let messages_area = Rect {
+                x: area.x + 50,
+                y: area.y + 15,
+                width: 30,
+                height: 10,
+            };
+            // Display the latest messages from the game to the user
+            let block = Block::default()
+                .title(Title::from(" messages ").alignment(Alignment::Center).position(Position::Top))
+                .borders(Borders::TOP)
+                .border_style(Style::default().fg(Color::White))
+                .border_type(BorderType::Rounded)
+                .style(Style::default().bg(Color::Blue));
+
+            let paragraph1 = if game.messages.is_empty() { "".to_string() } else { format!("> {}", game.messages.join("\n> ")) };
+            frame.render_widget(
+                Paragraph::new(paragraph1).block(block).wrap(Wrap { trim: true }),
+                messages_area,
+            );
+        })?;
+        let mut player_moved = false;
+        if event::poll(std::time::Duration::from_millis(FRAME_LENGTH))? {
+            if let event::Event::Key(key) = event::read()? {
+                if key.kind == KeyEventKind::Press && key.code == KeyCode::Char('v') {
+                    game.messages.insert(0, format!("You are playing version '{}'.", env!("GIT_HASH")).to_string());
+                }
+                // disabling the d key (disable fog of war) in release builds!
+                #[cfg(debug_assertions)]
+                if key.kind == KeyEventKind::Press && key.code == KeyCode::Char('d') {
+                    game.messages.insert(0, "toggle fog of war!".to_string());
+                    game.toggle_fog_of_war();
+                }
+
+                if key.kind == KeyEventKind::Press && key.code == KeyCode::Char('q') {
+                    break;
+                }
+                if key.kind == KeyEventKind::Press {
+                    let new_pos = match key.code {
+                        KeyCode::Left => {
+                            player_moved = true;
+                            game.move_player(-1, 0)
+                        }
+                        KeyCode::Right => {
+                            player_moved = true;
+                            game.move_player(1, 0)
+                        }
+                        KeyCode::Up => {
+                            player_moved = true;
+                            game.move_player(0, -1)
+                        }
+                        KeyCode::Down => {
+                            player_moved = true;
+                            game.move_player(0, 1)
+                        }
+                        _ => { (0, 0) }
+                    };
+                    if !game.player_fights_monster() {
+                        // player attacked monster but did not kill it
+                        game.move_player(new_pos.0, new_pos.1);
+                    }
+                    game.player_collects_artifact();
+                }
+            }
+        }
+        game.update_level(ticks, player_moved);
+        if game.get_game_state() != GameState::RUNNING {
+            break;
+        }
+        ticks += 1;
+    }
+    let playtime = start_time.elapsed();
+    loop {
+        let _ = terminal.draw(|frame| {
+            let mut area = frame.size();
+            let w = area.width / 2;
+            let h = area.height / 2;
+            area.x += w - 20;
+            area.y += h - 10;
+            area.width = 40;
+            area.height = 20;
+            let block = Block::default()
+                .title(Title::from(" Game ended ").alignment(Alignment::Center).position(Position::Top))
+                .title(Title::from("Press `q` to quit!").position(Position::Bottom))
+                .borders(Borders::ALL)
+                .border_style(Style::default().fg(Color::White))
+                .border_type(BorderType::Rounded)
+                .style(Style::default().bg(Color::Black));
+            let mut text = match game.get_game_state() {
+                GameState::RUNNING => {
+                    "Quitting is for cowards! You'll better try again!".to_string()
+                }
+                GameState::LOST => {
+                    format!("Sorry, you died in the dungeon. Better luck next time!\nLast message:\n{}", game.messages[0]).to_string()
+                }
+                GameState::WON => {
+                    "Congratulation! You mastered your way through the dungeon and won the game.".to_string()
+                }
+            };
+            text += format!("\n\nYou gained {} experience.", game.get_player().get_experience()).as_str();
+            text += format!("\nYou collected {} gold.", game.get_player().get_gold()).as_str();
+            text += format!("\nYou played {} seconds.", playtime.as_secs()).as_str();
+            let paragraph = Paragraph::new(text).block(block).wrap(Wrap { trim: true });
+            frame.render_widget(paragraph, area);
+        });
+        if event::poll(std::time::Duration::from_millis(16))? {
+            if let event::Event::Key(key) = event::read()? {
+                if key.kind == KeyEventKind::Press && key.code == KeyCode::Char('q') {
+                    break;
+                }
+            }
+        }
+    }
+    Ok(())
+}
+
+/// this function shows some manual text
+fn show_manual(terminal: &mut Terminal<CrosstermBackend<Stdout>>) {
+    let mut page = 0;
+    let pages = [
+        "Background story\n\n\
+        You are a traveller and on your journey....
+        ".to_string(),
+        "To control your character (depicted by the 8) you can use the cursor keys (←, ↑, →, ↓). \n\n\
+                To interact simply walk into the entity to interact with. Possible entities are creates \
+                (depicted by C), potions (depicted by P) or enemies.".to_string(),
+    ];
+    loop {
+        let _ = terminal.draw(|frame| {
+            let mut area = frame.size();
+            let w = area.width / 2;
+            let h = area.height / 2;
+            area.x += w - 20;
+            area.y += h - 10;
+            area.width = 40;
+            area.height = 20;
+            let block = Block::default()
+                .title(Title::from(format!(" Manual ({}/{})", page + 1, pages.len())).alignment(Alignment::Center).position(Position::Top))
+                .title(Title::from("`q` to quit, `↑` and `↓` to scroll.").position(Position::Bottom))
+                .borders(Borders::ALL)
+                .border_style(Style::default().fg(Color::White))
+                .border_type(BorderType::Rounded)
+                .style(Style::default().bg(Color::Black));
+            let paragraph = Paragraph::new(pages[page].as_str()).block(block).wrap(Wrap { trim: true });
+            frame.render_widget(paragraph, area);
+        });
+        if event::poll(std::time::Duration::from_millis(16)).unwrap_or(false) {
+            if let event::Event::Key(key) = event::read().unwrap() {
+                if key.kind == KeyEventKind::Press && key.code == KeyCode::Char('q') {
+                    break;
+                }
+                if key.kind == KeyEventKind::Press && key.code == KeyCode::Up {
+                    page = page.saturating_sub(1);
+                }
+                if key.kind == KeyEventKind::Press && key.code == KeyCode::Down {
+                    page = min(pages.len() - 1, page + 1);
+                }
+            }
+        }
+    }
 }
--- a/src/monster.rs
+++ b/src/monster.rs
@@ -1,33 +1,240 @@
-use crate::position::Position;
+use ratatui::prelude::Color;

-pub struct Monster {
+use crate::dungeon_slayer::MonsterStats;
+use crate::level::Level;
+use crate::position::{HasPosition, Position};
+use rand::Rng;
+
+
+pub trait Monster: HasPosition {
+    fn get_name(&self) -> &str;
+    fn is_dead(&self) -> bool;
+    fn get_representation(&self) -> (&str, Color);
+    fn decrease_life(&mut self, by: usize);
+    // fn get_immutable_position(&self) -> &Position;
+    fn get_experience_gain(&self) -> usize;
+    fn get_ticks_between_steps(&self) -> u128;
+    fn get_defense(&self) -> u8;
+    fn get_hit(&self) -> u8;
+    fn get_next_move(&self, level: &Level, player_pos: &Position) -> (i16, i16);
+    #[cfg(test)]
+    fn get_life(&self) -> usize;
+}
+
+macro_rules! default_monster {
+    ($($t:ty),+ $(,)?) => ($(
+        impl Monster for $t {
+            fn get_name(&self) -> &str { &self.name }
+            fn is_dead(&self) -> bool { self.life <= 0 }
+            fn get_experience_gain(&self) -> usize { self.experience_gain }
+            fn get_representation(&self) -> (&str, Color) { (&self.symbol, self.color) }
+            fn decrease_life(&mut self, by: usize) {
+                self.life = self.life.saturating_sub(by);
+            }
+            fn get_ticks_between_steps(&self) -> u128 { self.ticks_between_steps }
+            fn get_defense(&self) -> u8 { self.monster_stats.defense }
+            fn get_hit(&self) -> u8 { self.monster_stats.hit }
+            fn get_next_move(&self, level: &Level, player_pos: &Position) -> (i16, i16) {
+                self.calc_move(level, player_pos)
+            }
+            #[cfg(test)]
+            fn get_life(&self) -> usize { self.life }
+        }
+        impl HasPosition for $t {
+            fn get_position(&mut self) -> &mut Position {
+                &mut self.position
+            }
+            fn get_immutable_position(&self) -> &Position {
+                &self.position
+            }
+        }
+    )+)
+}
+
+/// Lower Daemon
+///     Page: 107
+///     GH: 1
+pub struct LowerDaemon {
+    name: String,
    life: usize,
    position: Position,
+    symbol: String,
+    color: Color,
+    experience_gain: usize,
+    ticks_between_steps: u128,
+    monster_stats: MonsterStats,
 }

-impl Monster {
-    pub fn new(life: usize) -> Self {
-        Monster {
-            life,
-            position: Position::new(0, 0, 0),
+impl crate::monster::LowerDaemon {
+    pub fn new_with_position(position: Position) -> Self {
+        let monster_stats = MonsterStats {
+            body: 5,
+            agility: 5,
+            mind: 5,
+            strength: 2,
+            toughness: 2,
+            movement: 2,
+            dexterity: 2,
+            wisdom: 2,
+            aura: 2,
+            max_life: 9,
+            defense: 9,
+            initiative: 7,
+            walk: 3,
+            hit: 8,
+            shoot: 0,
+            cast: 0,
+            targeted_cast: 0,
+        };
+        Self {
+            name: "lower daemon".to_string(),
+            life: monster_stats.max_life as usize,
+            position,
+            symbol: String::from("d"),
+            color: Color::Black,
+            experience_gain: 104,
+            ticks_between_steps: 30,
+            monster_stats,
        }
    }
-    pub fn get_life(&self) -> usize { self.life }
-    pub fn is_dead(&self) -> bool { self.life <= 0 }
-    pub fn decrease_life(&mut self, by: usize) {
-        self.life = self.life.saturating_sub(by);
-    }
-    pub fn get_position(&mut self) -> &mut Position {
-        &mut self.position
-    }
-    pub fn get_immutable_position(&self) -> &Position {
-        &self.position
+
+    fn calc_move(&self, _level: &Level, player_pos: &Position) -> (i16, i16) {
+        let d = self.position.distance(player_pos);
+        if d == 1 {
+            return self.position.get_direction(player_pos);
+        }
+        match rand::thread_rng().gen_range(0..5) {
+            1 => { (1, 0) }
+            2 => { (-1, 0) }
+            3 => { (0, 1) }
+            4 => { (0, -1) }
+            _ => { (0, 0) }
+        }
    }
 }
+default_monster!(LowerDaemon);
+
+/// Rat
+///     Page: 119
+///     GH: 1
+pub struct Rat {
+    name: String,
+    life: usize,
+    position: Position,
+    symbol: String,
+    color: Color,
+    experience_gain: usize,
+    ticks_between_steps: u128,
+    monster_stats: MonsterStats,
+}
+
+impl Rat {
+    pub fn new_with_position(position: Position) -> Self {
+        let monster_stats = MonsterStats {
+            body: 2,
+            agility: 4,
+            mind: 1,
+            strength: 1,
+            toughness: 0,
+            movement: 2,
+            dexterity: 0,
+            wisdom: 0,
+            aura: 0,
+            max_life: 3,
+            defense: 2,
+            initiative: 6,
+            walk: 3,
+            hit: 4,
+            shoot: 0,
+            cast: 0,
+            targeted_cast: 0,
+        };
+        Self {
+            name: "rat".to_string(),
+            life: monster_stats.max_life as usize,
+            position,
+            symbol: String::from("R"),
+            color: Color::Black,
+            experience_gain: 26,
+            ticks_between_steps: 25,
+            monster_stats,
+        }
+    }
+    fn calc_move(&self, _level: &Level, _player_pos: &Position) -> (i16, i16) {
+        match rand::thread_rng().gen_range(0..5) {
+            1 => { (1, 0) }
+            2 => { (-1, 0) }
+            3 => { (0, 1) }
+            4 => { (0, -1) }
+            _ => { (0, 0) }
+        }
+    }
+}
+default_monster!(Rat);
+
+/// Orc
+///     Page: 118
+///     GH: 2
+pub struct Orc {
+    name: String,
+    life: usize,
+    position: Position,
+    symbol: String,
+    color: Color,
+    experience_gain: usize,
+    ticks_between_steps: u128,
+    monster_stats: MonsterStats,
+}
+
+impl Orc {
+    pub fn new_with_position(position: Position) -> Self {
+        let monster_stats = MonsterStats {
+            body: 10,
+            agility: 6,
+            mind: 2,
+            strength: 2,
+            toughness: 3,
+            movement: 0,
+            dexterity: 3,
+            wisdom: 1,
+            aura: 0,
+            max_life: 23,
+            defense: 14,
+            initiative: 1,
+            walk: 4,
+            hit: 13,
+            shoot: 10,
+            cast: 0,
+            targeted_cast: 0,
+        };
+        Self {
+            name: "orc".to_string(),
+            life: monster_stats.max_life as usize,
+            position,
+            symbol: String::from("O"),
+            color: Color::DarkGray,
+            experience_gain: 63,
+            ticks_between_steps: 50,
+            monster_stats,
+        }
+    }
+    fn calc_move(&self, _level: &Level, _player_pos: &Position) -> (i16, i16) {
+        match rand::thread_rng().gen_range(0..5) {
+            1 => { (1, 0) }
+            2 => { (-1, 0) }
+            3 => { (0, 1) }
+            4 => { (0, -1) }
+            _ => { (0, 0) }
+        }
+    }
+}
+
+default_monster!(Orc);
+

 #[test]
 fn monsters_can_move() {
-    let mut m = Monster::new(2);
+    let mut m = Rat::new_with_position(Position::new(0, 0, 0));
    assert_eq!(m.get_position(), &Position::new(0, 0, 0));
    m.get_position().change(1, 2);
    assert_eq!(m.get_position(), &Position::new(0, 1, 2));
@@ -40,12 +247,18 @@ fn monsters_can_move() {

 #[test]
 fn monsters_can_die() {
-    let mut m = Monster::new(2);
-    assert_eq!(m.get_life(), 2);
+    let mut m = Rat::new_with_position(Position::new(0, 0, 0));
+    assert_eq!(m.get_life(), 3);
    assert_eq!(m.is_dead(), false);
    m.decrease_life(1);
-    assert_eq!(m.get_life(), 1);
-    m.decrease_life(2);
+    assert_eq!(m.get_life(), 2);
+    m.decrease_life(3);
    assert_eq!(m.get_life(), 0);
    assert_eq!(m.is_dead(), true);
 }
+
+#[test]
+fn test_rat_values() {
+    let m = Rat::new_with_position(Position::new(0, 0, 0));
+    assert_eq!(m.monster_stats.max_life, 3);
+}
--- a/src/player.rs
+++ b/src/player.rs
@@ -1,35 +1,46 @@
 use std::cmp::{max, min};
-use crate::position::Position;
+
+use crate::dungeon_slayer::PlayerStats;
+use crate::position::{HasPosition, Position};

 pub struct Player {
    name: String,
    position: Position,
    life: i16,
-    max_life: i16,
    gold: usize,
+    experience: usize,
+    pub(crate) player_stats: PlayerStats,
 }

 impl Player {
-    pub fn new(name: &str, max_life: i16) -> Player {
+    pub fn new(name: &str, player_stats: PlayerStats) -> Player {
        Player {
            name: name.to_string(),
            position: Position::new(0, 0, 0),
-            life: max_life,
-            max_life,
+            life: player_stats.get_max_life() as i16,
            gold: 0,
+            experience: 0,
+            player_stats,
        }
    }
    pub fn get_name(&self) -> String {
        return self.name.clone();
    }
-    pub fn change_life(&mut self, by: i16) {
-        self.life = max(0, min(self.max_life, self.life + by));
+    pub fn decrease_life(&mut self, by: u8) {
+        self.life = max(0, self.life.saturating_sub(by as i16));
+    }
+    pub fn increase_life(&mut self, by: u8) {
+        self.life = min(self.life.saturating_add(by as i16), self.get_max_life());
    }
    pub fn get_life(&self) -> i16 {
        self.life
    }
-    pub fn get_position(&mut self) -> &mut Position {
-        &mut self.position
+    /// returns true if the player is dead (life <= 0)
+    pub fn is_dead(&self) -> bool { self.life <= 0 }
+    /// returns true if the player's life is at maximum
+    pub fn is_healthy(&self) -> bool { self.life == self.get_max_life() }
+    pub fn get_max_life(&self) -> i16 {
+        self.player_stats.get_max_life() as i16
    }

    /// add the given amount to the players gold stash
@@ -37,6 +48,19 @@ impl Player {

    /// return the size of the players gold stash
    pub fn get_gold(&self) -> usize { self.gold }
+
+    pub fn gain_experience(&mut self, amount: usize) { self.experience += amount }
+
+    pub fn get_experience(&self) -> usize { self.experience }
+}
+
+impl HasPosition for Player {
+    fn get_position(&mut self) -> &mut Position {
+        &mut self.position
+    }
+    fn get_immutable_position(&self) -> &Position {
+        &self.position
+    }
 }

 #[test]
@@ -45,15 +69,37 @@ fn test_get_name() {
        name: "Teddy Tester".to_string(),
        position: Position::new(0, 1, 1),
        life: 5,
-        max_life: 10,
        gold: 0,
+        experience: 0,
+        player_stats: PlayerStats {
+            body: 0,
+            agility: 0,
+            mind: 0,
+            strength: 0,
+            toughness: 0,
+            movement: 0,
+            dexterity: 0,
+            wisdom: 0,
+            aura: 0,
+        },
    };
    assert_eq!(p.get_name(), "Teddy Tester");
 }

 #[test]
 fn test_can_receive_gold() {
-    let mut p = Player::new("Teddy Tester", 10);
+    let player_stats = PlayerStats {
+        body: 8,
+        agility: 8,
+        mind: 4,
+        strength: 3,
+        toughness: 3,
+        movement: 1,
+        dexterity: 1,
+        wisdom: 0,
+        aura: 0,
+    };
+    let mut p = Player::new("Teddy Tester", player_stats);
    assert_eq!(p.get_gold(), 0);

    p.retrieve_gold(13);
@@ -67,21 +113,43 @@ fn test_change_life() {
        name: "Teddy Tester".to_string(),
        position: Position::new(0, 1, 1),
        life: 5,
-        max_life: 10,
        gold: 0,
+        experience: 0,
+        player_stats: PlayerStats {
+            body: 0,
+            agility: 0,
+            mind: 0,
+            strength: 0,
+            toughness: 0,
+            movement: 0,
+            dexterity: 0,
+            wisdom: 0,
+            aura: 0,
+        },
    };
-    assert_eq!(p.life, 5);
-    p.change_life(-2);
-    assert_eq!(p.life, 3);
-    p.change_life(10);
-    assert_eq!(p.life, 10);
-    p.change_life(-12);
-    assert_eq!(p.life, 0);
+    assert_eq!(p.get_life(), 5);
+    p.decrease_life(2);
+    assert_eq!(p.get_life(), 3);
+    p.increase_life(10);
+    assert_eq!(p.get_life(), 10);
+    p.decrease_life(12);
+    assert_eq!(p.get_life(), 0);
 }

 #[test]
 fn player_can_move() {
-    let mut p = Player::new("Teddy Tester", 10);
+    let player_stats = PlayerStats {
+        body: 8,
+        agility: 8,
+        mind: 4,
+        strength: 3,
+        toughness: 3,
+        movement: 1,
+        dexterity: 1,
+        wisdom: 0,
+        aura: 0,
+    };
+    let mut p = Player::new("Teddy Tester", player_stats);
    assert_eq!(p.get_position(), &Position::new(0, 0, 0));
    p.get_position().change(1, 2);
    assert_eq!(p.get_position(), &Position::new(0, 1, 2));
@@ -90,4 +158,28 @@ fn player_can_move() {
    p.get_position().set(1, 2, 3);
    p.get_position().change(2, 1);
    assert_eq!(p.get_position(), &Position::new(1, 4, 4));
+    assert_eq!(p.get_immutable_position(), &Position::new(1, 4, 4));
+}
+
+#[test]
+fn test_max_life() {
+    let p = Player {
+        name: "Teddy Tester".to_string(),
+        position: Position::new(0, 1, 1),
+        life: 5,
+        gold: 0,
+        experience: 0,
+        player_stats: PlayerStats {
+            body: 0,
+            agility: 0,
+            mind: 0,
+            strength: 0,
+            toughness: 0,
+            movement: 0,
+            dexterity: 0,
+            wisdom: 0,
+            aura: 0,
+        },
+    };
+    assert_eq!(p.get_max_life(), 10);
 }
--- a/src/position.rs
+++ b/src/position.rs
@@ -1,3 +1,13 @@
+use std::cmp::{max, min};
+
+/// describes an character (PC or NPC) in the dungeon that has a position.
+pub trait HasPosition {
+    /// returns a mutable position
+    fn get_position(&mut self) -> &mut Position;
+    /// returns an immutable position
+    fn get_immutable_position(&self) -> &Position;
+}
+
 #[derive(PartialEq, Debug)]
 pub struct Position {
    level: usize,
@@ -13,9 +23,10 @@ impl Position {
            y,
        }
    }
-    pub fn change(&mut self, dx: i16, dy: i16) {
-        self.x = ((self.x as i16) + dx) as usize;
-        self.y = ((self.y as i16) + dy) as usize;
+    pub fn change(&mut self, dx: i16, dy: i16) -> (usize, usize) {
+        self.x = max((self.x as i16) + dx, 0) as usize;
+        self.y = max((self.y as i16) + dy, 0) as usize;
+        (self.x, self.y)
    }
    pub fn set(&mut self, level: usize, x: usize, y: usize) {
        self.level = level;
@@ -32,4 +43,56 @@ impl Position {
    }

    pub fn get_y(&self) -> usize { self.y }
+
+    /// calculate the distance to the other position using the manhattan metric
+    pub fn distance(&self, other: &Self) -> usize {
+        self.x.abs_diff(other.x) + self.y.abs_diff(other.y)
+    }
+
+    /// get the direction (step size 1) towards the other position
+    pub fn get_direction(&self, other: &Self) -> (i16, i16) {
+        (
+            max(min(other.x as i16 - self.x as i16, 1), -1),
+            max(min(other.y as i16 - self.y as i16, 1), -1)
+        )
+    }
+}
+
+#[test]
+fn test_get_direction() {
+    let p1 = Position::new(0, 10, 10);
+    let p2 = Position::new(0, 8, 8);
+    assert_eq!(p1.get_direction(&p2), (-1, -1));
+    let p2 = Position::new(0, 11, 10);
+    assert_eq!(p1.get_direction(&p2), (1, 0));
+}
+
+#[test]
+fn test_position_change() {
+    let mut p = Position::new(0, 10, 10);
+
+    let res = p.change(-1, 1);
+    assert_eq!(res, (9, 11));
+    assert_eq!(p.get_x(), 9);
+    assert_eq!(p.get_y(), 11);
+
+    let res = p.change(-9, 1);
+    assert_eq!(res, (0, 12));
+    assert_eq!(p.get_x(), 0);
+    assert_eq!(p.get_y(), 12);
+
+    let res = p.change(-1, -13);
+    assert_eq!(res, (0, 0));
+    assert_eq!(p.get_x(), 0);
+    assert_eq!(p.get_y(), 0);
+}
+
+#[test]
+fn test_position_set() {
+    let mut p = Position::new(0, 10, 10);
+
+    p.set(1, 2, 3);
+    assert_eq!(p.get_level(), 1);
+    assert_eq!(p.get_x(), 2);
+    assert_eq!(p.get_y(), 3);
 }
Author	SHA1	Message	Date
Joachim Lusiardi	1c6e5d26d0	Show manual extract playing the game and the manual from main	2024-01-23 09:56:31 +01:00
Joachim Lusiardi	4a31994ac9	add a basic manual	2024-01-22 20:47:35 +01:00
Joachim Lusiardi	a7195b9c3d	adjust monster speed	2024-01-19 10:39:15 +01:00
Joachim Lusiardi	970904c411	Monsters move after the player moved this allows direct counter attack or fleeing	2024-01-19 10:39:05 +01:00
Joachim Lusiardi	32fffd492d	Fog of War can be disabled in dev builds	2024-01-19 10:10:52 +01:00
Joachim Lusiardi	119a3d314a	clean up some warnings	2024-01-14 13:31:40 +01:00
Joachim Lusiardi	5265682c53	Show last message on death	2024-01-14 13:21:20 +01:00
Joachim Lusiardi	efe531f6ce	movement depends on monster class now	2024-01-10 16:40:46 +01:00
Joachim Lusiardi	0b08cb41c2	more work on dungeon slayer	2024-01-10 11:00:23 +01:00
Joachim Lusiardi	cad08bd300	Player and monster attacks follow the dungeon slayer rules	2024-01-06 13:02:31 +01:00
Joachim Lusiardi	0431d872e4	using character and monster sheets	2024-01-06 10:38:34 +01:00
Joachim Lusiardi	1f02ffc36e	update ratatui	2024-01-06 10:35:37 +01:00
Joachim Lusiardi	210d590e38	prevent player from leaving the field	2024-01-03 09:12:00 +01:00
Joachim Lusiardi	e4018d9cce	remove unused import	2024-01-01 15:34:52 +01:00
Joachim Lusiardi	f6bb0a9297	version can be displayed as message	2023-12-31 18:10:09 +01:00
Joachim Lusiardi	b6d61e4bd1	Merge remote-tracking branch 'origin/include_git_hash' into add_messages	2023-12-31 17:45:42 +01:00
Joachim Lusiardi	85496e3200	make git commit hash available at compile time	2023-12-31 17:41:59 +01:00
Joachim Lusiardi	4770a21abe	for changes to add messages	2023-12-31 15:59:52 +01:00
Joachim Lusiardi	a69e89c806	Only consume potions if they have an effect	2023-12-30 16:44:23 +01:00
Joachim Lusiardi	b3d64f7438	Monsters can attack player now	2023-12-30 16:31:27 +01:00
Joachim Lusiardi	b88bc67c50	monsters move and attack the player	2023-12-26 19:11:41 +01:00
Joachim Lusiardi	2098bedabe	make monsters more like players	2023-12-26 11:38:23 +01:00
Joachim Lusiardi	c0d51f501f	extract has_position trait	2023-12-25 13:47:15 +01:00
Joachim Lusiardi	bb8a24aa91	clean up monsters	2023-12-25 13:26:45 +01:00
Joachim Lusiardi	67faae44b1	Prevent crashes when terminal is too small	2023-12-25 08:44:44 +01:00
Joachim Lusiardi	de5ea76913	step to xp	2023-12-22 20:10:30 +01:00
Joachim Lusiardi	6082a740e9	make chest's gold depend on level	2023-12-22 09:52:50 +01:00
Joachim Lusiardi	db96dc5c8a	Add gold to the result message	2023-12-21 23:13:13 +01:00
Joachim Lusiardi	2a86201c3e	add 3 distinct outcomes for the game	2023-12-21 23:02:06 +01:00
Joachim Lusiardi	6b6206370b	Make enemies randomized	2023-12-18 17:04:48 +01:00
Joachim Lusiardi	73315a7636	monsters as trait	2023-12-18 16:11:19 +01:00
Joachim Lusiardi	7ac3b76e6c	add some documentation	2023-12-17 22:00:42 +01:00
Joachim Lusiardi	f87712e8d2	clean up code	2023-12-17 19:48:58 +01:00
Joachim Lusiardi	8b21e179c2	fight monsters, collect artifacts	2023-12-17 16:14:17 +01:00
User Jlusiardi	643f3b76f9	More work	2023-12-09 22:43:06 +01:00
Joachim Lusiardi	206a49fb08	reworked level widget to stateful widget	2023-12-09 20:16:03 +01:00
Joachim Lusiardi	6e2441aad1	give different artifacts differen looks	2023-12-09 20:05:39 +01:00
Joachim Lusiardi	4a024a47d9	randomize artifact generation	2023-12-09 17:39:26 +01:00
Joachim Lusiardi	e47036bd8d	more tests	2023-12-09 08:43:41 +01:00
Joachim Lusiardi	7b0eaf6640	add test & fix bug	2023-12-06 21:02:40 +01:00
Joachim Lusiardi	6aee9d974f	Move works again	2023-12-06 03:18:59 +01:00
Joachim Lusiardi	21a292b7ad	make stuff public	2023-12-05 17:13:39 +01:00
Joachim Lusiardi	aa3fa6efb1	Work on levelgenerator	2023-12-04 18:41:21 +01:00