import { JsonAsset, resources } from 'cc';
import { WeaponConfig } from './BulletTypes';

/**
 * 轻量配置加载器：管理 weapons.json 数据
 * - 可通过 setWeaponsData 直接注入（推荐迁移时使用）
 * - 可从 resources 目录加载（路径示例：data/weapons）
 */
export class ConfigLoader {
  private static weaponsData: { weapons: WeaponConfig[] } | null = null;

  public static setWeaponsData(data: { weapons: WeaponConfig[] } | null) {
    this.weaponsData = data;
  }

  public static async loadWeaponsFromResources(path: string): Promise<void> {
    return new Promise((resolve, reject) => {
      resources.load(path, JsonAsset, (err, asset) => {
        if (err) {
          reject(err);
          return;
        }
        try {
          const json = asset.json as any;
          if (!json || !json.weapons) {
            throw new Error('Invalid weapons.json structure');
          }
          this.weaponsData = json as { weapons: WeaponConfig[] };
          resolve();
        } catch (e) {
          reject(e);
        }
      });
    });
  }

  public static getWeaponConfig(id: string): WeaponConfig | null {
    if (!this.weaponsData || !this.weaponsData.weapons) return null;
    const w = this.weaponsData.weapons.find(x => x.id === id);
    return w ?? null;
  }

  public static clearCache() {
    this.weaponsData = null;
  }
}