import { fabric } from "fabric";
import TileSet from "./tileset";

const image = new fabric.Image();

export default class TileMap {
  /**
   * @param {TileSet} tileset 
   * @param {{chunkSiz:number}} opts 
   */
  constructor(tileset, opts = {}) {
    this.tileset = tileset;

    this.opts = {
      chunkSize: 8,
      ...opts,
    }

    this.chunks = [];
  }

  getChunk(x, y) {
    const cs = this.opts.chunkSize;
    const cx = x > 0 ? Math.floor(x / cs) : Math.ceil(x / cs);
    const cy = y > 0 ? Math.floor(y / cs) : Math.ceil(y / cs);

    let chunk = this.chunks.find(c => c.x === cx && c.y === cy);
    if (chunk == null) {
      chunk = new Chunk(x, y, cs);
      this.chunks.push(chunk);
    }

    return chunk;
  }
}

class Chunk {
  constructor(x, y, size) {
    this.x = x;
    this.y = y;
    this.size = size;
  }
}