'use strict';

const assert = require('assert');
const _ = require('lodash');
const uuid = require('uuid');
const urljoin = require('url-join');
const stringRandom = require('string-random');
const Controller = require('egg').Controller;
const { BusinessError, ErrorCode } = require('naf-core').Error;

/**
 * 微信认证，获得openid和用户信息，生成微信Jwt
 */
class WeixinController extends Controller {
  /**
   * 认证流程
   * 1. 缓存原始请求地址，生成state和认证回调地址
   * 2. 通过wxapi认证，获得认证code
   * 3. 通过code获得openid，通过openid，查询绑定用户，创建jwt
   * 4. jwt写入redis，返回认证code
   * 5. 通过code获取jwt
   */
  // GET 请求认证
  // response_type:
  //       code - url带上code参数重定向到原始地址
  //       store - 默认，认证结果写入sessionStore，然后重定向回请求页面（要求请求页面和认证服务在同一域名下）
  //       token - url带上token参数重定向到原始地址
  async auth() {
    const { redirect_uri, code, test, type, response_type = 'store', uid, qrcode, msgid, objid } = this.ctx.query;
    if (test) {
      return await this.authTest();
    }
    if (code) {
      return await this.authBack(this.ctx.query);
    }

    this.ctx.logger.debug(`[auth] reditect_uri - ${redirect_uri}`);
    // assert(redirect_uri, '回调地址不能为空');

    // TODO: 保存原始请求地址
    // const { config } = this.app;
    // console.log('ctx.host: ', this.ctx.host);
    // console.log('config.hostHeaders: ', config.hostHeaders);
    // TODO: 保存原始请求地址
    const state = uuid();
    const key = `visit:auth:state:${state}`;
    const val = JSON.stringify({ redirect_uri, type, uid, qrcode, msgid, objid });
    await this.app.redis.set(key, val, 'EX', 600);

    // TODO: 生成回调地址
    const { wxapi, authUrl = this.ctx.path } = this.app.config;
    const backUrl = encodeURI(`${this.app.config.baseUrl}${this.config.authUrl}?state=${state}`);
    const to_uri = encodeURI(`${wxapi.baseUrl}/api/auth?appid=${wxapi.appid}&response_type=code&redirect_uri=${backUrl}#wechat`);
    // const backUrl = encodeURI(`${this.app.config.baseUrl}${this.config.authUrl}/`);
    // const to_uri = `https://open.weixin.qq.com/connect/oauth2/authorize?appid=${wxapi.appid}&response_type=code&scope=snsapi_base&redirect_uri=${backUrl}&state=${state}&connect_redirect=1#wechat_redirect`;
    this.ctx.redirect(to_uri);
  }

  // GET 认证回调
  async authBack({ code, state }) {
    // const { code, state, type, redirecturi } = this.ctx.query;
    this.ctx.logger.debug(`[auth-back] code - ${code}, state - ${state}`);
    assert(code, 'code不能为空');
    assert(state, 'state不能为空');
    const { weixin } = this.ctx.service;
    const key = `visit:auth:state:${state}`;
    const val = await this.app.redis.get(key);
    let openid;
    try {
      ({ openid } = await weixin.fetch(code));
    } catch (err) {
      this.ctx.logger.error(err);
      console.error(err);
      await this.ctx.render('error.njk', { title: err.message, message: err.details });
      return;
    }
    if (openid) {
      const { redirect_uri, type, uid, qrcode, msgid, objid } = JSON.parse(val);
      const user = await this.ctx.service.user.findByOpenid(openid);
      if (type === '0') {
        // 通过openid取得用户信息
        if (user) {
          const getToken = async user => await this.ctx.service.login.createJwt(user);
          if (user.type === '4') {
            // 学生
            // 检查学生是否已退出,学生表的isComming是不是2,如果是2 就跳到别的地方提示您已退出
            const stu = await this.ctx.service.student.fetch({ id: user.uid });
            if (stu) {
              const { isComming } = stu;
              if (isComming && isComming === '2') {
                const refuse = `${this.app.config.baseUrl}/msgconfirm/isleave`;
                this.ctx.redirect(refuse);
              } else {
                const to_uri = urljoin(redirect_uri, `?token=${await getToken(user)}`);
                // TODO: 重定性页面
                this.ctx.redirect(to_uri);
              }
            } else {
              const touri = `${this.app.config.baseUrl}/student/bind`;
              const to_uri = urljoin(touri, `?openid=${openid}`);
              this.ctx.redirect(to_uri);
            }
          } else if (user.type === '1') {
            // 班主任
            const touri = `${this.app.config.baseUrl}/mobiledirtea`;
            const to_uri = urljoin(touri, `?token=${await getToken(user)}`);
            // TODO: 重定性页面
            this.ctx.redirect(to_uri);
          } else if (user.type === '3') {
            // 教师
            const touri = `${this.app.config.baseUrl}/mobiledirtea`;
            const to_uri = urljoin(touri, `?token=${await getToken(user)}`);
            // TODO: 重定性页面
            this.ctx.redirect(to_uri);
          }
        } else {
          // const resunionid = await weixin.fetchUnionID(openid);
          const touri = `${this.app.config.baseUrl}/student/bind`;
          const to_uri = urljoin(touri, `?openid=${openid}`); // &unionid=${resunionid.unionid}
          // TODO: 重定性页面
          this.ctx.redirect(to_uri);
        }
      } else if (type === '1') {
        // 绑定微信
        const to_uri = urljoin(redirect_uri, `?openid=${openid}&uid=${uid}&type=${type}&qrcode=${qrcode}`);
        // TODO: 重定性页面
        this.ctx.redirect(to_uri);
      } else if (type === '2') {
        // 学生绑定
        const to_uri = urljoin(redirect_uri, `?openid=${openid}&type=${type}&qrcode=${qrcode}`);
        // TODO: 重定性页面
        this.ctx.redirect(to_uri);
      } else if (type === '9') {
        // 查看消息
        const to_uri = urljoin(redirect_uri, `?openid=${openid}&type=${type}&msgid=${msgid}&objid=${objid}`);
        // TODO: 重定性页面
        this.ctx.redirect(to_uri);
      }
    }
  }

  // GET 用户授权内部测试接口
  async authTest() {
    const { redirect_uri, type, uid, qrcode, openid, msgid, objid } = this.ctx.query;
    // const openid = stringRandom();
    this.ctx.logger.debug(`[auth-test] reditect_uri - ${redirect_uri}, openid - ${openid}`);
    assert(redirect_uri, '回调地址不能为空');
    assert(openid, 'openid不能为空');
    const user = await this.ctx.service.user.findByOpenid(openid);
    if (type === '0') {
      // 通过openid取得用户信息
      if (user) {
        const token = await this.ctx.service.login.createJwt(user);
        if (user.type === '4') {
          const to_uri = urljoin(redirect_uri, `?token=${token}`);
          // TODO: 重定性页面
          this.ctx.redirect(to_uri);
        } else if (user.type === '1') {
          const touri = `${this.app.config.baseUrl}/mobiledirtea`;
          const to_uri = urljoin(touri, `?token=${token}`);
          // TODO: 重定性页面
          this.ctx.redirect(to_uri);
        } else if (user.type === '3') {
          const touri = `${this.app.config.baseUrl}/mobiledirtea`;
          const to_uri = urljoin(touri, `?token=${token}`);
          // TODO: 重定性页面
          this.ctx.redirect(to_uri);
        }
      } else {
        console.log('rrr0000--->' + redirect_uri);
        const resunionid = await this.ctx.service.weixin.fetchUnionID(openid);
        const touri = `${this.app.config.baseUrl}/student/bind`;
        const to_uri = urljoin(touri, `?openid=${openid}&unionid=${resunionid.unionid}`);
        // TODO: 重定性页面
        this.ctx.redirect(to_uri);
      }
    } else if (type === '1') {
      const to_uri = urljoin(redirect_uri, `?openid=${openid}&uid=${uid}&type=${type}&qrcode=${qrcode}`);
      // TODO: 重定性页面
      console.log('1111---?' + to_uri);
      this.ctx.redirect(to_uri);
    } else if (type === '2') {
      const to_uri = urljoin(redirect_uri, `?openid=${openid}&type=${type}&qrcode=${qrcode}`);
      // TODO: 重定性页面
      console.log('22222---?' + to_uri);
      this.ctx.redirect(to_uri);
    } else if (type === '9') {
      // const token = await this.ctx.service.login.createJwt(user);
      const to_uri = urljoin(redirect_uri, `?openid=${openid}&type=${type}&msgid=${msgid}&objid=${objid}`);
      // TODO: 重定性页面
      console.log('99999---?' + to_uri);
      this.ctx.redirect(to_uri);
    }
  }

  // GET 签到小程序请求用户
  async appAuth() {
    try {
      const { js_code, login = true } = this.ctx.query;
      console.log(js_code);
      const appopenid = await this.ctx.service.weixin.appAuth(js_code);
      if (!login) this.ctx.ok(appopenid);
      console.warn(`openid=>${appopenid}`);
      // const state = uuid();
      // const key = `appinfo:${state}`;
      // await this.app.redis.set(key, appopenid, 'EX', 600);
      const res = await this.ctx.service.user.findByAppOpenid(appopenid);
      const obj = { user: res, openid: appopenid };
      this.ctx.ok(obj);
    } catch (error) {
      throw new BusinessError(ErrorCode.NETWORK, '获取小程序信息失败,请尝试重新进入');
    }
  }
  // 微信网页端登录(班主任,学生)
  async openidLogin() {
    const res = await this.ctx.service.login.openidLogin(this.ctx.request.body);
    this.ctx.ok({ data: res });
  }
}

module.exports = WeixinController;