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, 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 {
    /// a chest that contains some gold
    position: Position,
    gold: usize,
}

impl Chest {
    pub fn new(position: Position) -> Self {
        let level = position.get_level();
        Self {
            position,
            // 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, 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 {
    /// a potion that restores some health
    position: Position,
    health: usize,
}

impl Potion {
    pub fn new(position: Position) -> Self {
        Self {
            position,
            health: 5,
        }
    }
}

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, 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.change_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
    }
}