import BinaryStream from '../../../common/binarystream';
import Corner from './corner';

/**
 * war3map.w3e - the environment file.
 */
export default class War3MapW3e {
  version: number = 0;
  tileset: string = 'A';
  haveCustomTileset: number = 0;
  groundTilesets: string[] = [];
  cliffTilesets: string[] = [];
  mapSize: Int32Array = new Int32Array(2);
  centerOffset: Float32Array = new Float32Array(2);
  corners: Corner[][] = [];

  constructor(buffer?: ArrayBuffer) {
    if (buffer) {
      this.load(buffer);
    }
  }

  load(buffer: ArrayBuffer) {
    let stream = new BinaryStream(buffer);

    if (stream.read(4) !== 'W3E!') {
      return false;
    }

    this.version = stream.readInt32();
    this.tileset = stream.read(1);
    this.haveCustomTileset = stream.readInt32();

    for (let i = 0, l = stream.readInt32(); i < l; i++) {
      this.groundTilesets[i] = stream.read(4);
    }

    for (let i = 0, l = stream.readInt32(); i < l; i++) {
      this.cliffTilesets[i] = stream.read(4);
    }

    stream.readInt32Array(this.mapSize);
    stream.readFloat32Array(this.centerOffset);

    for (let row = 0, rows = this.mapSize[1]; row < rows; row++) {
      this.corners[row] = [];

      for (let column = 0, columns = this.mapSize[0]; column < columns; column++) {
        let corner = new Corner();

        corner.load(stream);

        this.corners[row][column] = corner;
      }
    }

    return true;
  }

  save() {
    let buffer = new ArrayBuffer(this.getByteLength());
    let stream = new BinaryStream(buffer);

    stream.write('W3E!');
    stream.writeInt32(this.version);
    stream.write(this.tileset);
    stream.writeInt32(this.haveCustomTileset);
    stream.writeUint32(this.groundTilesets.length);

    for (let groundTileset of this.groundTilesets) {
      stream.write(groundTileset);
    }

    stream.writeUint32(this.cliffTilesets.length);

    for (let cliffTileset of this.cliffTilesets) {
      stream.write(cliffTileset);
    }

    stream.writeInt32Array(this.mapSize);
    stream.writeFloat32Array(this.centerOffset);

    for (let row of this.corners) {
      for (let corner of row) {
        corner.save(stream);
      }
    }

    return buffer;
  }

  getByteLength() {
    return 37 + (this.groundTilesets.length * 4) + (this.cliffTilesets.length * 4) + (this.mapSize[0] * this.mapSize[1] * 7);
  }
}