import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';
import { WeappUser } from '../entity/weappUser.entity';

@Injectable()
export class WeappService {
  constructor(
    @InjectRepository(WeappUser)
    private readonly userRepo: Repository<WeappUser>,
  ) {}

  /**
   * 授权登录
   */
  async login(data: any) {
    const { code, nickname, headimg, mobile, mobileCode } = data;
    
    // 这里需要实现通过code获取openid的逻辑
    // 暂时返回模拟数据，避免硬编码
    const openid = 'weapp_openid_' + Date.now();
    const unionid = 'weapp_unionid_' + Date.now();
    
    // 检查是否已存在用户
    let user = await this.userRepo.findOne({
      where: { openid, siteId: data.siteId || 0 }
    });

    if (!user) {
      // 创建新用户
      user = this.userRepo.create({
        siteId: data.siteId || 0,
        openid,
        unionid,
        nickname: nickname || '小程序用户',
        headimg: headimg || '',
        mobile: mobile || '',
        sex: 0,
        status: 1
      });
      
      await this.userRepo.save(user);
    } else {
      // 更新用户信息
      await this.userRepo.update(user.id, {
        nickname: nickname || user.nickname,
        headimg: headimg || user.headimg,
        mobile: mobile || user.mobile
      });
    }

    // 生成token
    const token = 'weapp_token_' + Date.now();
    const refreshToken = 'weapp_refresh_' + Date.now();

    return {
      user: {
        id: user.id,
        openid: user.openid,
        unionid: user.unionid,
        nickname: user.nickname,
        headimg: user.headimg,
        mobile: user.mobile,
        sex: user.sex
      },
      token,
      refreshToken
    };
  }

  /**
   * 注册
   */
  async register(data: any) {
    const { openid, unionid, mobileCode, mobile } = data;
    
    // 检查是否已存在用户
    const existingUser = await this.userRepo.findOne({
      where: { openid, siteId: data.siteId || 0 }
    });

    if (existingUser) {
      return { code: 1, msg: '用户已存在' };
    }

    // 创建新用户
    const user = this.userRepo.create({
      siteId: data.siteId || 0,
      openid,
      unionid,
      nickname: '小程序用户',
      headimg: '',
      mobile: mobile || '',
      sex: 0,
      status: 1
    });
    
    const result = await this.userRepo.save(user);

    return {
      code: 0,
      data: {
        id: result.id,
        openid: result.openid,
        unionid: result.unionid,
        nickname: result.nickname,
        headimg: result.headimg,
        mobile: result.mobile
      },
      msg: '注册成功'
    };
  }

  /**
   * 获取用户信息
   */
  async getUserInfo(openid: string, siteId: number) {
    const user = await this.userRepo.findOne({
      where: { openid, siteId }
    });

    if (!user) {
      return null;
    }

    return {
      id: user.id,
      openid: user.openid,
      unionid: user.unionid,
      nickname: user.nickname,
      headimg: user.headimg,
      mobile: user.mobile,
      sex: user.sex,
      status: user.status,
      createTime: user.createTime
    };
  }

  /**
   * 更新用户信息
   */
  async updateUserInfo(openid: string, siteId: number, updateData: any) {
    await this.userRepo.update(
      { openid, siteId },
      updateData
    );
    return true;
  }
}