import { resources, BufferAsset, assetManager, AssetManager } from "cc";
import * as cfg from "../../schema/schema";
import ByteBuf from "db://assets/Scripts/luban/ByteBuf";
import { BaseConfig } from "../config/BaseConfig";
import { ThemeConfig } from "../config/ThemeConfig";
import { PurchaseConfig } from "../config/PurchaseConfig";
import { GlobalConfig } from "../config/GlobalConfig";
import { GirlConfig } from "../config/GirlConfig";
import { GirlDetailConfig } from "../config/GirlDetailConfig";
import { AiCharacterConfig } from "../config/AiCharacterConfig";
import { logger } from "db://assets/Scripts/Main/Common/Logger";

/**
 * 集中定义数据ID，避免写错字符串
 */
export enum ConfigId {
  Theme = "theme", // 主题配置
  Purchase = "purchase", // 商城配置
  Global = "global", // 全局配置
  Girl = "girl", // 技师的简要配置
  GirlDetail = "girlDetail", // 技师的详细配置
  AiCharacter = "aiCharacter", // 技师的详细配置
}

/** 构造器类型 */
type DataCtor<T extends BaseConfig = BaseConfig> = new () => T;

export class ConfigManager {
  private static _instance: ConfigManager = null;
  public static get I(): ConfigManager {
    if (!this._instance) {
      this._instance = new ConfigManager();
    }
    return this._instance;
  }

  public static tables: cfg.Tables = null;
  private static dataMap = new Map<string, Uint8Array>();
  public static jsonFileNames: string[] = [];

  // 数据实例缓存
  private _dataMap: Map<string, BaseConfig> = new Map();
  // 数据ID到构造器的映射
  private _config: Map<string, DataCtor> = new Map();

  private constructor() {}

  public init() {
    this.loadAllConfig();
    this.registerAll();
  }

  public loadConfigName(): void {
    ConfigManager.jsonFileNames = cfg.Tables.getTableNames();
  }

  public loadAllConfig() {
    this.loadConfigName();
    let promises: Promise<unknown>[] = [];
    for (let curFileName of ConfigManager.jsonFileNames) {
      let promise = new Promise((resolve, reject) => {
        let bundle = assetManager.getBundle("DataTable");
        if (bundle) {
          bundle.load(curFileName, BufferAsset, (err, data) => {
            resolve(data);
          });
        } else {
          assetManager.loadBundle(
            "DataTable",
            (err: Error, _bundle: AssetManager.Bundle) => {
              if (err) {
                logger.log(err);
                reject && reject(err);
                return;
              } else {
                _bundle.load(curFileName, BufferAsset, (err, data) => {
                  resolve(data);
                });
              }
            }
          );
        }
      });
      promise.then((data: BufferAsset) => {
        if (data) {
          ConfigManager.dataMap.set(
            curFileName,
            new Uint8Array(data.buffer().slice(0, data.buffer().byteLength))
          );
        } else {
          logger.error("静态配置加载失败" + curFileName);
        }
      });
      promises.push(promise);
    }
    Promise.all(promises).then((values) => {
      logger.log("静态配置加载完成");
      ConfigManager.tables = new cfg.Tables(ConfigManager.I.getFileData);
    });
  }
  private getFileData(fileName: string): ByteBuf {
    if (ConfigManager.dataMap.has(fileName)) {
      return new ByteBuf(ConfigManager.dataMap.get(fileName));
    }
    return null;
  }

  /** --------------------------------------------------------- 配置数据实例相关 --------------------------------------------------------- */

  /**
   * 注册 数据ID → 构造器
   */
  private registerAll(): void {
    this.register(ConfigId.Theme, ThemeConfig);
    this.register(ConfigId.Purchase, PurchaseConfig);
    this.register(ConfigId.Global, GlobalConfig);
    this.register(ConfigId.Girl, GirlConfig);
    this.register(ConfigId.GirlDetail, GirlDetailConfig);
    this.register(ConfigId.AiCharacter, AiCharacterConfig);
  }

  /**
   * 注册一个数据ID及其对应的构造器
   */
  private register<T extends BaseConfig>(
    configId: string,
    ctor: DataCtor<T>
  ): void {
    if (this._config.has(configId)) {
      console.warn(
        `[ConfigManager] 重复注册数据ID: ${configId}，将覆盖旧构造器`
      );
    }
    this._config.set(configId, ctor);
  }

  /**
   * 获取数据（已存在则直接返回；否则按配置自动实例化并缓存）
   */
  public getDataById<T extends BaseConfig = BaseConfig>(
    configId: string
  ): T | null {
    // 先从缓存取
    const cached = this._dataMap.get(configId) as T | undefined;
    if (cached) return cached;

    // 缓存没有→ 查找构造器
    const Ctor = this._config.get(configId) as DataCtor<T> | undefined;
    if (!Ctor) {
      console.warn(`[ConfigManager] 未找到 configId 的构造器配置: ${configId}`);
      return null;
    }

    // 动态创建 & init & 缓存
    const instance = new Ctor();
    // 若你的 BaseConfig.init 接受 configId，可传入
    instance.init?.(configId);
    this._dataMap.set(configId, instance);
    return instance;
  }

  /**
   * 移除数据
   */
  public removeData(configId: string): boolean {
    const data = this._dataMap.get(configId);
    if (data) {
      data.destroy?.();
      this._dataMap.delete(configId);
      return true;
    }
    return false;
  }

  /**
   * 重置所有数据
   */
  public resetAllData(): void {
    this._dataMap.forEach((data) => data.reset?.());
  }

  /**
   * 清空所有数据
   */
  public clearAllData(): void {
    this._dataMap.forEach((data) => data.clear?.());
  }

  /**
   * 销毁所有数据
   */
  public destroyAllData(): void {
    this._dataMap.forEach((data) => data.destroy?.());
    this._dataMap.clear();
  }
}