import 'package:flutter/services.dart';
import 'package:wolf_3d_data/wolf_3d_data.dart';

class WolfMap {
  /// The fully parsed and decompressed levels from the game files.
  final List<WolfLevel> levels;
  final List<Sprite> textures;
  final List<Sprite> sprites;

  // A private constructor so we can only instantiate this from the async loader
  WolfMap._(
    this.levels,
    this.textures,
    this.sprites,
  );

  /// Asynchronously loads the map files and parses them into a new WolfMap instance.
  static Future<WolfMap> loadShareware() async {
    // 1. Load the binary data
    final mapHead = await rootBundle.load("assets/MAPHEAD.WL1");
    final gameMaps = await rootBundle.load("assets/GAMEMAPS.WL1");
    final vswap = await rootBundle.load("assets/VSWAP.WL1");

    // 2. Parse the data using the parser we just built
    final parsedLevels = WLParser.parseMaps(
      mapHead,
      gameMaps,
      isShareware: true,
    );
    final parsedTextures = WLParser.parseWalls(vswap);
    final parsedSprites = WLParser.parseSprites(vswap);

    // 3. Return the populated instance!
    return WolfMap._(
      parsedLevels,
      parsedTextures,
      parsedSprites,
    );
  }

  /// Asynchronously loads the map files and parses them into a new WolfMap instance.
  static Future<WolfMap> loadRetail() async {
    // 1. Load the binary data
    final mapHead = await rootBundle.load("assets/MAPHEAD.WL6");
    final gameMaps = await rootBundle.load("assets/GAMEMAPS.WL6");
    final vswap = await rootBundle.load("assets/VSWAP.WL6");

    // 2. Parse the data using the parser we just built
    final parsedLevels = WLParser.parseMaps(mapHead, gameMaps);
    final parsedTextures = WLParser.parseWalls(vswap);
    final parsedSprites = WLParser.parseSprites(vswap);

    // 3. Return the populated instance!
    return WolfMap._(
      parsedLevels,
      parsedTextures,
      parsedSprites,
    );
  }
}