use std::io::Result;
use std::io::stdout;

use crossterm::{
    event::{self, KeyCode, KeyEventKind},
    ExecutableCommand,
    terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use ratatui::{
    prelude::{CrosstermBackend, Stylize, Terminal},
    widgets::Paragraph,
};
use ratatui::prelude::*;
use ratatui::widgets::Block;
use whoami::realname;

use crate::game::Game;
use crate::level_widget::LevelWidget;
// use crate::level_widget::LevelWidget;
use crate::player::Player;

mod game;
mod player;
mod level;
mod position;
mod level_widget;
mod level_generator;
mod artifacts;
mod monster;

//
fn main() -> Result<()> {
    let mut game = Game::new(Player::new(realname().as_str(), 10));

    stdout().execute(EnterAlternateScreen)?;
    enable_raw_mode()?;
    let mut terminal = Terminal::new(CrosstermBackend::new(stdout()))?;
    terminal.clear()?;

    loop {
        terminal.draw(|frame| {
            let mut area = frame.size();
            frame.render_widget(Block::default().style(Style::default().bg(Color::Green)), area);

            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 {}, map_area, &mut game);

            let stats_area = Rect {
                x: area.x + 50,
                y: area.y,
                width: 30,
                height: 25,
            };
            frame.render_widget(
                Paragraph::new(format!("{}\nHealth: {}/{}\nGold: {}\nLevel: {}",
                                       game.get_player().get_name(),
                                       game.get_player().get_life(),
                                       game.get_player().get_max_life(),
                                       game.get_player().get_gold(),
                                       game.get_player().get_immutable_position().get_level()))
                    .white()
                    .on_blue(),
                stats_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;
                }
                if key.kind == KeyEventKind::Press {
                    let new_pos = match key.code {
                        KeyCode::Left => { game.move_player(-1, 0) }
                        KeyCode::Right => { game.move_player(1, 0) }
                        KeyCode::Up => { game.move_player(0, -1) }
                        KeyCode::Down => { 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();
                }
            }
        }
    }

    stdout().execute(LeaveAlternateScreen)?;
    disable_raw_mode()?;
    Ok(())
}