'use strict';

const Controller = require('egg').Controller;
const { v4: uuidv4 } = require('uuid');
class WxapiController extends Controller {
  async get_openid() {
    const { ctx } = this;
    const { code, redirect_uri, userId, state } = ctx.query.code;
    const { appid } = this.app.config.wxconfig;
    const uuid = uuidv4();
    if (redirect_uri) {
      // redirect_uri = 获取openid后跳转地址（可以是用户正常回调地址，也可以是绑定页面地址）
      await this.app.redis.set(`redirect_uri${uuid}`, redirect_uri, 'EX', 600);
    }
    if (userId) {
      await this.app.redis.set(`userId${uuid}`, userId, 'EX', 600);
    }
    if (code) {
      return await this.get_openid_back({ code, state });
    }
    // const host = this.ctx.header.referer.split('/')[2];
    const host = this.ctx.header.host;
    const backUrl = `${this.ctx.protocol}://${host}${ctx.path}`;
    const to_url = `https://open.weixin.qq.com/connect/oauth2/authorize?appid=${appid}&redirect_uri=${backUrl}&response_type=code&state=${uuid}&scope=snsapi_base#wechat_redirect`;
    ctx.redirect(to_url);
  }
  // GET 获取openid认证回调
  async get_openid_back({ code, state }) {
    const redirect_uri = await this.app.redis.get(`redirect_uri${state}`);
    const userId = await this.app.redis.get(`userId${state}`);
    if (!redirect_uri) return { errcode: -1001, errmsg: '回调地址不存在', data: '' };
    const { appid, appsecret } = this.app.config.wxconfig;
    const url = `https://api.weixin.qq.com/sns/oauth2/access_token?appid=${appid}&secret=${appsecret}&code=${code}&grant_type=authorization_code`;
    const { openid } = await this.ctx.curl(url);
    // TODO: 重定性到跳转页面
    await this.ctx.render('redirect.njk', { openid, redirect_uri, userId });
  }
  async get_userInfo() {
    const { ctx } = this;
    const { code, redirect_uri, state, userId } = ctx.query;
    const { appid } = this.app.config.wxconfig;
    const uuid = uuidv4();
    if (redirect_uri) {
      await this.app.redis.set(`redirect_uri${uuid}`, redirect_uri, 'EX', 600);
    }
    if (userId) {
      await this.app.redis.set(`userId${uuid}`, userId, 'EX', 600);
    }
    if (code) {
      return await this.get_userInfo_back({ code, state });
    }
    // const host = this.ctx.header.referer.split('/')[2];
    const host = this.ctx.header.host;
    const backUrl = `${this.ctx.protocol}://${host}${ctx.path}`;
    const to_url = `https://open.weixin.qq.com/connect/oauth2/authorize?appid=${appid}&redirect_uri=${backUrl}&response_type=code&state=${uuid}&scope=snsapi_userinfo#wechat_redirect`;
    ctx.redirect(to_url);
  }
  // GET 获取用户信息认证回调
  async get_userInfo_back({ code, state }) {
    const redirect_uri = await this.app.redis.get(`redirect_uri${state}`);
    if (!redirect_uri) return { errcode: -1001, errmsg: '回调地址不存在', data: '' };
    const userId = await this.app.redis.get(`userId${state}`);
    const { appid, appsecret } = this.app.config.wxconfig;
    const url = `https://api.weixin.qq.com/sns/oauth2/access_token?appid=${appid}&secret=${appsecret}&code=${code}&grant_type=authorization_code`;
    const { openid, access_token } = await this.ctx.curl(url);
    const wxuserurl = `https://api.weixin.qq.com/sns/userinfo?access_token=${access_token}&openid=${openid}&lang=zh_CN`;
    const wxuserinfo = await this.ctx.curl(wxuserurl);
    // TODO: 重定性到跳转页面
    await this.ctx.render('redirect.njk', { openid, redirect_uri, wxuserinfo, userId });
  }
  // 获取access_token
  async get_accessToken() {
    const { appid, appsecret } = this.app.config.wxconfig;
    const to_uri = `https://api.weixin.qq.com/cgi-bin/token?appid=${appid}&secret=${appsecret}&grant_type=client_credential`;
    const { access_token } = await this.ctx.curl(to_uri);
    return access_token;
  }
  // 下发模板消息
  async pushMould() {
    const { adminTemplateId } = this.app.config.wxconfig;
    const access_token = await this.gettoken();
    const to_uri = `ttps://api.weixin.qq.com/cgi-bin/message/template/send?access_token=${access_token}`;
    const { openid, data } = this.ctx.request.body;
    await this.ctx.curl(to_uri, {
      method: 'POST',
      dataType: 'json',
      data: JSON.stringify({
        touser: openid,
        template_id: adminTemplateId,
        data,
      }),
    });
  }
}

module.exports = WxapiController;