'use strict';

const assert = require('assert');
const _ = require('lodash');
const { ObjectId } = require('mongoose').Types;
const { CrudService } = require('naf-framework-mongoose/lib/service');
const { BusinessError, ErrorCode } = require('naf-core').Error;
const jwt = require('jsonwebtoken');
const uuid = require('uuid');

class LoginService extends CrudService {
  constructor(ctx) {
    super(ctx, 'login');
    this.uModel = this.ctx.model.User;
    this.stuModel = this.ctx.model.Student;
    this.tModel = this.ctx.model.Teacher;
    this.schModel = this.ctx.model.School;
    this.hModel = this.ctx.model.Headteacher;
  }

  async login(data) {
    const { mobile, passwd } = data;
    assert(mobile, 'mobile不能为空');
    // assert(/^\d{11}$/i.test(mobile), 'mobile无效');
    assert(passwd, 'passwd不能为空');
    const res = await this.uModel.findOne({ mobile }, '+passwd');
    if (!res) {
      throw new BusinessError(ErrorCode.USER_NOT_EXIST);
    }
    // 验证密码
    console.log('sjk-->' + res.passwd.secret);
    console.log('sr-->' + passwd);
    if (res.passwd.secret !== passwd) {
      throw new BusinessError(ErrorCode.BAD_PASSWORD);
    }
    return await this.createJwt(res);
  }

  // 创建登录Token
  async createJwt({ _id, name, mobile, openid, type, uid, status }) {
    const { secret, expiresIn = '1d', issuer = type } = this.config.jwt;
    const subject = mobile;
    let _userid = '';
    let res = {};
    // 身份，0、中心管理元1、班主任用户2、学校用户3、教师4、学生
    if (type === '0') {
      _userid = _id.toString();
      res = { userid: _userid, name, type, id: _id, status };
    } else if (type === '1') {
      _userid = uid.toString();
      const result = await this.hModel.findById(_userid);
      res = { userid: _userid, name, type, id: _id, status };
    } else if (type === '2') {
      _userid = uid.toString();
      const result = await this.schModel.findById(_userid);
      res = { userid: _userid, code: result.code, name, type, id: _id, status };
    } else if (type === '3') {
      _userid = uid.toString();
      const result = await this.tModel.findById(_userid);
      res = { userid: _userid, schid: result.schid, schname: result.schname, name, subid: result.subid, type, id: _id, status };
    } else if (type === '4') {
      _userid = uid;
      console.log('进入查询--' + _userid);
      const result = await this.stuModel.findById(_userid);
      console.log(result);
      res = { userid: _userid, schid: result.schid, schname: result.school_name, termid: result.termid, batchid: result.batchid, classid: result.classid, bedroomid: result.bedroomid, bedroom: result.bedroom, job: result.job, name, type, id: _id, status, planid: result.planid };
    }
    const token = await jwt.sign(res, secret, { expiresIn, issuer, subject });
    return token;
  }

  // 微信校验mq接口
  async wxcheck(data) {
    const { qrcode, openid } = data;
    assert(qrcode, 'qrcode不能为空');
    assert(openid, 'openid不能为空');
    // TODO: 发布扫码成功消息
    console.log('qrcode-->' + qrcode);
    const { mq } = this.ctx;
    const ex = 'qrcode.login';
    const parm = {
      durable: true,
      headers: {
        openid,
      } };
    if (mq) {
      await mq.topic(ex, qrcode, 'scaned', parm);
    }
  }

  // 微信登录接口
  async wxlogin(data) {
    const { qrcode, openid } = data;
    assert(qrcode, 'qrcode不能为空');
    assert(openid, 'openid不能为空');
    const res = await this.uModel.findOne({ openid });
    if (!res) {
      throw new BusinessError(ErrorCode.USER_NOT_EXIST);
    }
    const result = await this.createJwt(res);
    return result;
  }

  async userbind(data) {
    const { qrcode, openid } = data;
    assert(qrcode, 'qrcode不能为空');
    assert(openid, 'openid不能为空');
    const key = `naf:qrcode:login:${qrcode}`;
    const status = await this.app.redis.get(key);
    if (!status) {
      throw new BusinessError(ErrorCode.SERVICE_FAULT, '二维码已过期');
    }
    if (status !== 'pending') {
      throw new BusinessError(ErrorCode.SERVICE_FAULT, '二维码状态无效');
    }
    const res = await this.uModel.findOne({ openid });
    if (!res) {
      throw new BusinessError(ErrorCode.USER_NOT_EXIST);
    }
    const result = await this.createJwt(res);
    // TODO: 修改二维码状态，登录凭证保存到redis
    await this.app.redis.set(key, `scaned:${result}`, 'EX', 600);
    // TODO: 发布扫码成功消息
    const { mq } = this.ctx;
    const ex = 'qrcode.login';
    if (mq) {
      await mq.topic(ex, qrcode, 'scaned', { durable: true });
    }
  }

  /**
   * 创建二维码
   * 随机生成二维码，并保存在Redis中，状态初始为pending
   * 状态描述：
   * pending - 等待扫码
   * consumed - 使用二维码登录完成
   * ${jwt.token} - Jwt登录凭证
   */
  async createQrcode() {
    const qrcode = uuid();
    const key = `naf:qrcode:login:${qrcode}`;
    await this.app.redis.set(key, 'pending', 'EX', 600);
    return qrcode;
  }

  // 使用二维码换取登录凭证
  async qrcodeLogin(qrcode) {
    assert(qrcode, 'qrcode不能为空');
    const key = `naf:qrcode:login:${qrcode}`;
    const val = await this.app.redis.get(key);
    if (!val) {
      throw new BusinessError(ErrorCode.SERVICE_FAULT, '二维码已过期');
    }
    const [ status, token ] = val.split(':', 2);
    if (status !== 'scaned' || !token) {
      throw new BusinessError(ErrorCode.SERVICE_FAULT, '二维码状态无效');
    }

    // TODO: 修改二维码状态
    await this.app.redis.set(key, 'consumed', 'EX', 600);

    return { token };
  }

  // 检查二维码状态
  async checkQrcode(qrcode) {
    assert(qrcode, 'qrcode不能为空');
    const key = `naf:qrcode:login:${qrcode}`;
    const val = await this.app.redis.get(key);
    if (!val) {
      throw new BusinessError(ErrorCode.SERVICE_FAULT, '二维码已过期');
    }
    const [ status ] = val.split(':', 2);
    return { status };
  }
}
module.exports = LoginService;