use crate::{
    config::TILESET_SCALING,
    content::materials::MaterialId,
    proc_gen::{
        Biome,
        tileset_loader::{Tile, TileOrientation, TilesetPixelType},
    },
    sim::cell::Cell,
};

pub struct MinesBiome;

impl Biome for MinesBiome {
    fn derive_world_from_tile(&self, tile: &Tile) -> Vec<Cell> {
        let tp = TILESET_SCALING.pow(2) as u32;
        let mut cells =
            vec![Cell::void(); (tile.dimensions.short * tile.dimensions.long * tp) as usize];
        let ey = match tile.orientation {
            TileOrientation::Horizontal => tile.dimensions.short,
            TileOrientation::Vertical => tile.dimensions.long,
        };
        let ex = match tile.orientation {
            TileOrientation::Horizontal => tile.dimensions.long,
            TileOrientation::Vertical => tile.dimensions.short,
        };

        for y in 0..ey {
            for x in 0..ex {
                let idx = (x + y * ex) * tp;
                for i in 0..tp {
                    cells[(idx + i) as usize] = match tile.pixels[(x + y * ex) as usize] {
                        TilesetPixelType::Void => Cell::void(),
                        TilesetPixelType::Terrain => Cell::from_material(MaterialId::Dirt),
                    }
                }
            }
        }

        cells
    }
}