/**
 * 飞书用户管理器模块
 *
 * 功能说明：
 * - 负责飞书OAuth2登录用户的获取或创建
 * - SessionToken管理
 * - 用户信息同步和更新
 *
 * @module user-manager
 * @author fmode
 * @date 2026
 */

import crypto from 'crypto';
import type { FeishuConfig } from './config.ts';
import type { FeishuUserInfo } from './client.ts';

/**
 * 用户会话信息接口
 */
export interface UserSessionInfo {
  user: any;
  sessionToken: any;
  userInfo: {
    objectId: string;
    username: string;
    nickname: string;
    mobile?: string;
    email?: string;
    avatar: string;
    sessionToken: string;
  };
}

/**
 * 飞书用户管理器类
 * 负责用户的查找、创建、更新和sessionToken管理
 */
export class FeishuUserManager {
  private configManager: any;

  /**
   * 构造函数
   * @param configManager - 配置管理器实例（必填）
   */
  constructor(configManager: FeishuConfig) {
    this.configManager = configManager;
  }


  /**
   * 根据飞书用户信息获取或创建用户，并生成sessionToken
   *
   * @async
   * @param userInfo - 飞书用户信息
   * @param appId - 飞书应用ID
   * @returns Promise<UserSessionInfo>
   * @throws {Error} 处理失败时抛出错误
   */
  async getUserInfoSessionToken(userInfo: FeishuUserInfo, appId: string): Promise<UserSessionInfo> {
    try {
      console.log(`处理飞书用户登录，unionId: ${userInfo.unionId}, openId: ${userInfo.openId}`);

      let user = await this.findOrCreateUser(userInfo);

      const sessionToken = await this.generateSessionToken(user);

      await this.saveUserData(user, userInfo);

      console.log(`用户登录成功，userId: ${user.id}, username: ${user.get('username')}`);

      return {
        user: user,
        sessionToken: sessionToken,
        userInfo: {
          objectId: user.id,
          username: user.get('username'),
          nickname: user.get('nickname'),
          mobile: user.get('mobile'),
          email: user.get('email'),
          avatar: user.get('avatar'),
          sessionToken: sessionToken.get('sessionToken'),
        }
      };

    } catch (error) {
      console.error('获取用户sessionToken失败:', error);
      throw error;
    }
  }

  /**
   * 查找或创建用户
   *
   * @async
   * @param userInfo - 飞书用户信息
   * @returns Promise<any> Parse用户对象
   * @throws {Error} 查找或创建失败时抛出错误
   */
  async findOrCreateUser(userInfo: FeishuUserInfo): Promise<any> {
    try {
      let username = `feishu_${userInfo.openId}`;

      let user = await this.findUserByUnionId(userInfo.unionId);

      if (!user) {
        user = await this.findUserByOpenId(userInfo.openId);
      }

      if (!user) {
        user = await this.findUserByUsername(username);
      }

      if (!user && userInfo.mobile) {
        user = await this.findUserByMobile(userInfo.mobile);
      }

      if (user) {
        console.log(`找到现有用户，更新信息: ${user.id}`);
        await this.updateUserInfo(user, userInfo);
        return user;
      }

      console.log(`创建新用户，unionId: ${userInfo.unionId}`);
      return await this.createNewUser(userInfo);

    } catch (error) {
      console.error('查找或创建用户失败:', error);
      throw error;
    }
  }

  /**
   * 生成用户默认密码
   *
   * @param username - 用户名
   * @returns 默认密码
   */
  generateDefaultPassword(username: string): string {
    if (!username || username.length < 6) {
      return username.padStart(6, '0');
    }
    return username.slice(-6);
  }

  /**
   * 通过unionId查找用户
   *
   * @async
   * @param unionId - 飞书用户unionId
   * @returns Promise<any | null>
   */
  async findUserByUnionId(unionId: string): Promise<any | null> {
    try {
      const Parse = (global as any).Parse;
      if (!Parse) {
        throw new Error('Parse不可用');
      }

      const query = new Parse.Query("_User");
      query.equalTo("data.feishu.unionId", unionId);

      return await query.first({ useMasterKey: true });
    } catch (error) {
      console.error('通过unionId查找用户失败:', error);
      return null;
    }
  }

  /**
   * 通过openId查找用户
   *
   * @async
   * @param openId - 飞书用户openId
   * @returns Promise<any | null>
   */
  async findUserByOpenId(openId: string): Promise<any | null> {
    try {
      const Parse = (global as any).Parse;
      if (!Parse) {
        throw new Error('Parse不可用');
      }

      const query = new Parse.Query("_User");
      query.equalTo("data.feishu.openId", openId);

      return await query.first({ useMasterKey: true });
    } catch (error) {
      console.error('通过openId查找用户失败:', error);
      return null;
    }
  }

  /**
   * 通过用户名查找用户
   *
   * @async
   * @param username - 用户名
   * @returns Promise<any | null>
   */
  async findUserByUsername(username: string): Promise<any | null> {
    try {
      const Parse = (global as any).Parse;
      if (!Parse) {
        throw new Error('Parse不可用');
      }

      const query = new Parse.Query("_User");
      query.equalTo("username", username);

      return await query.first({ useMasterKey: true });
    } catch (error) {
      console.error('通过username查找用户失败:', error);
      return null;
    }
  }

  /**
   * 通过手机号查找用户
   *
   * @async
   * @param mobile - 手机号
   * @returns Promise<any | null>
   */
  async findUserByMobile(mobile: string): Promise<any | null> {
    try {
      const Parse = (global as any).Parse;
      if (!Parse) {
        throw new Error('Parse不可用');
      }

      const query = new Parse.Query("_User");
      query.equalTo("mobile", mobile);

      return await query.first({ useMasterKey: true });
    } catch (error) {
      console.error('通过手机号查找用户失败:', error);
      return null;
    }
  }

  /**
   * 更新现有用户信息
   *
   * @async
   * @param user - Parse用户对象
   * @param userInfo - 飞书用户信息
   * @returns Promise<void>
   * @throws {Error} 更新失败或用户被冻结时抛出错误
   */
  async updateUserInfo(user: any, userInfo: FeishuUserInfo): Promise<void> {
    try {
      if (userInfo.name) user.set('nickname', userInfo.name);
      if (userInfo.mobile) user.set('mobile', userInfo.mobile);
      if (userInfo.avatarUrl) user.set('avatar', userInfo.avatarUrl);

      const data = user.get('data') || {};
      data.feishu = {
        unionId: userInfo.unionId,
        openId: userInfo.openId,
        name: userInfo.name,
        enName: userInfo.enName,
        avatarUrl: userInfo.avatarUrl,
        mobile: userInfo.mobile,
        email: userInfo.email,
        userId: userInfo.userId,
        lastLoginAt: new Date(),
        updatedAt: new Date()
      };
      user.set('data', data);

      if (user.get('status') === 'freeze') {
        throw new Error('该账户已被冻结');
      }

      await user.save(null, { useMasterKey: true });
      console.log(`用户信息更新成功: ${user.id}`);
    } catch (error) {
      console.error('更新用户信息失败:', error);
      throw error;
    }
  }

  /**
   * 创建新用户
   *
   * @async
   * @param userInfo - 飞书用户信息
   * @returns Promise<any> Parse用户对象
   * @throws {Error} 创建失败时抛出错误
   */
  async createNewUser(userInfo: FeishuUserInfo): Promise<any> {
    try {
      const Parse = (global as any).Parse;
      if (!Parse) {
        throw new Error('Parse不可用');
      }

      const UserClass = Parse.Object.extend("_User");
      const user = new UserClass();

      const username = `feishu_${userInfo.openId}`;
      const defaultPassword = this.generateDefaultPassword(username);

      user.set("username", username);
      user.set("password", defaultPassword);
      user.set("nickname", userInfo.name || `飞书用户_${userInfo.openId.slice(-6)}`);
      user.set("mobile", userInfo.mobile);
      user.set("avatar", userInfo.avatarUrl || 'https://s1-imfile.feishucdn.com/static-resource/v1/default_avatar.png');
      user.set("type", 'user');
      user.set("status", 'normal');

      user.set("data", {
        feishu: {
          unionId: userInfo.unionId,
          openId: userInfo.openId,
          name: userInfo.name,
          enName: userInfo.enName,
          avatarUrl: userInfo.avatarUrl,
          mobile: userInfo.mobile,
          email: userInfo.email,
          userId: userInfo.userId,
          createdAt: new Date(),
          lastLoginAt: new Date(),
        }
      });

      await user.save(null, { useMasterKey: true });
      console.log(`新用户创建成功: ${user.id}, username: ${username}, 默认密码: ${defaultPassword}`);

      return user;
    } catch (error) {
      console.error('创建新用户失败:', error);
      throw error;
    }
  }

  /**
   * 生成sessionToken（优化版：复用未过期的token）
   *
   * @async
   * @param user - Parse用户对象
   * @returns Promise<any> Session对象
   * @throws {Error} 生成失败时抛出错误
   */
  async generateSessionToken(user: any): Promise<any> {
    try {
      const Parse = (global as any).Parse;
      if (!Parse) {
        throw new Error('Parse不可用');
      }

      // 查询用户现有的有效 sessionToken（剩余有效期大于2小时）
      const twoHoursLater = new Date();
      twoHoursLater.setHours(twoHoursLater.getHours() + 2);

      const query = new Parse.Query('_Session');
      query.equalTo('user', {
        __type: 'Pointer',
        className: '_User',
        objectId: user.id
      });
      query.greaterThan('expiresAt', twoHoursLater);
      query.descending('expiresAt');

      const existingSession = await query.first({ useMasterKey: true });

      // 如果找到剩余有效期大于2小时的 session，直接复用
      if (existingSession) {
        console.log(`复用现有SessionToken for user: ${user.id}`);
        return existingSession;
      }

      // 创建新的 sessionToken
      const salt = user.id + '_' + (new Date().getTime() / 1000).toFixed();
      const md5 = crypto.createHash('md5').update(salt, 'utf8').digest('hex');
      const sessionToken = "r:" + md5;

      console.log(`生成新SessionToken: ${sessionToken} for user: ${user.id}`);

      const expiresAt = new Date();
      expiresAt.setFullYear(expiresAt.getFullYear() + 1);

      // 使用 REST API 创建 Session，绕过 SDK 的只读属性限制
      const serverURL = Parse.serverURL || (globalThis as any).appConfig.serverURL;
      const appId = Parse.applicationId || (globalThis as any)?.appConfig.appId;
      const masterKey = Parse.masterKey || (globalThis as any)?.appConfig.masterKey;

      const response = await fetch(`${serverURL}/classes/_Session`, {
        method: 'POST',
        headers: {
          'X-Parse-Application-Id': appId,
          'X-Parse-Master-Key': masterKey,
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({
          user: {
            __type: 'Pointer',
            className: '_User',
            objectId: user.id
          },
          sessionToken: sessionToken,
          expiresAt: {
            __type: 'Date',
            iso: expiresAt.toISOString()
          },
          createdWith: {
            action: "login",
            authProvider: "feishu"
          },
          restricted: false
        })
      });

      if (!response.ok) {
        const errorText = await response.text();
        throw new Error(`Session创建失败: ${response.status} ${errorText}`);
      }

      const data = await response.json();
      if (!data || !data.objectId) {
        throw new Error('Session创建失败：未返回objectId');
      }

      // 查询并返回创建的 Session 对象
      const sessionQuery = new Parse.Query('_Session');
      sessionQuery.equalTo('objectId', data.objectId);
      const savedSession = await sessionQuery.first({ useMasterKey: true });

      if (!savedSession) {
        throw new Error('Session查询失败');
      }

      return savedSession;
    } catch (error) {
      console.error('生成sessionToken失败:', error);
      throw error;
    }
  }

  /**
   * 保存用户附加信息到data字段
   *
   * @async
   * @param user - Parse用户对象
   * @param userInfo - 飞书用户信息
   * @returns Promise<void>
   */
  async saveUserData(user: any, userInfo: FeishuUserInfo): Promise<void> {
    try {
      const data = user.get('data') || {};

      if (!data.feishu) {
        data.feishu = {};
      }

      data.feishu[userInfo.openId] = {
        ...userInfo,
        lastLoginAt: new Date(),
        updatedAt: new Date()
      };

      data.feishu.unionId = userInfo.unionId;
      data.feishu.currentOpenId = userInfo.openId;

      user.set('data', data);
      await user.save(null, { useMasterKey: true });

      console.log(`用户数据保存成功: ${user.id}`);
    } catch (error) {
      console.error('保存用户数据失败:', error);
    }
  }

  /**
   * 验证sessionToken
   *
   * @async
   * @param sessionToken - 会话令牌
   * @returns Promise<any | null>
   */
  async validateSessionToken(sessionToken: string): Promise<any | null> {
    try {
      const Parse = (global as any).Parse;
      if (!Parse) {
        throw new Error('Parse不可用');
      }

      const query = new Parse.Query('_Session');
      query.equalTo('sessionToken', sessionToken);
      query.greaterThan('expiresAt', new Date());
      query.include('user');

      const session = await query.first({ useMasterKey: true });

      if (session && session.get('user')) {
        return session.get('user');
      }

      return null;
    } catch (error) {
      console.error('验证sessionToken失败:', error);
      return null;
    }
  }

  /**
   * 通过unionId查找所有关联用户
   *
   * @async
   * @param unionId - 飞书统一ID
   * @returns Promise<any[]>
   */
  async findUsersByUnionId(unionId: string): Promise<any[]> {
    try {
      const Parse = (global as any).Parse;
      if (!Parse) {
        throw new Error('Parse不可用');
      }

      const query = new Parse.Query("_User");
      query.equalTo("data.feishu.unionId", unionId);

      return await query.find({ useMasterKey: true });
    } catch (error) {
      console.error('通过unionId查找用户失败:', error);
      return [];
    }
  }
}

/**
 * 默认导出用户管理器类
 */
export default FeishuUserManager;