use std::collections::HashMap;

use super::tile::*;
use raylib::prelude::*;

#[derive(Debug, Default, Clone, Copy, PartialEq)]
pub struct Pos {
	pub x: isize,
	pub y: isize,
}

impl From<(usize, usize)> for Pos {
	fn from(value: (usize, usize)) -> Self {
		Self {
			x: value.0 as isize,
			y: value.1 as isize,
		}
	}
}

#[derive(Debug, Clone)]
pub struct Board {
	rows: Vec<Vec<Tile>>,
	width: usize,
	height: usize,
}

impl Board {
	pub fn new_empty(width: usize, height: usize) -> Self {
		let rows = vec![vec![Tile::Blank; width]; height];
		Self {
			rows,
			width,
			height,
		}
	}

	pub fn new(rows: Vec<Vec<Tile>>) -> Self {
		Self {
			width: rows[0].len(),
			height: rows.len(),
			rows,
		}
	}

	pub fn in_bounds(&self, p: Pos) -> bool {
		p.x >= 0 && p.y >= 0 && p.x < self.width as isize && p.y < self.height as isize
	}

	pub fn get(&self, p: Pos) -> Option<Tile> {
		if self.in_bounds(p) {
			Some(self.rows[p.y as usize][p.x as usize])
		} else {
			None
		}
	}

	pub fn get_or_blank(&self, p: Pos) -> Tile {
		if self.in_bounds(p) {
			self.rows[p.y as usize][p.x as usize]
		} else {
			Tile::default()
		}
	}

	pub fn get_mut(&mut self, p: Pos) -> &mut Tile {
		if self.in_bounds(p) {
			&mut self.rows[p.y as usize][p.x as usize]
		} else {
			panic!(
				"position {p:?} out of bounds, size is {}x{}",
				self.width, self.height
			);
		}
	}

	pub fn set(&mut self, p: Pos, tile: Tile) {
		if self.in_bounds(p) {
			self.rows[p.y as usize][p.x as usize] = tile;
		}
	}

	pub fn width(&self) -> usize {
		self.width
	}

	pub fn height(&self) -> usize {
		self.height
	}

	pub fn draw(
		&self,
		d: &mut RaylibDrawHandle,
		textures: &HashMap<String, Texture2D>,
		offset: Vector2,
		zoom: i32,
	) {
		let tile_size = 16 << zoom;
		for x in 0..self.width {
			for y in 0..self.height {
				if let Some(tile) = self.get((x, y).into()) {
					let px = x as i32 * tile_size + offset.x as i32 + tile_size / 2;
					let py = y as i32 * tile_size + offset.y as i32 + tile_size / 2;
					tile.draw(d, textures, px, py, tile_size, zoom);
				}
			}
		}
	}
}