const express = require('express');
const _ = require('lodash');
const { query, body } = require('express-validator');
const { onSuccess, fill, dateFormat, onError } = require('../../../utils');
const { limit, COURSE_STATUS, COURSE_TYPE } = require('../../config');
const check = require('../../../middleware/check');
const Course = require('../../../db/models/course');
const Teacher = require('../../../db/models/teacher');
const Chapter = require('../../../db/models/chapter');

const router = express.Router();
const _COURSE_STATUS = _.invert(COURSE_STATUS);
const _COURSE_TYPE = _.invert(COURSE_TYPE);

async function fillSingle(data) {
  const { teacherId, recordId } = data;
  const recorder = await Teacher.findOne({ where: { id: recordId } });
  data.teachers = await Promise.all(
    teacherId.map(item => {
      return Teacher.findOne({ where: { id: item } });
    })
  );
  recorder && (data.recordName = recorder.name);
  data.publishAt && (data.publishAt = dateFormat(data.publishAt));
  data.statusStr = _COURSE_STATUS[data.status];
  data.typeStr = _COURSE_TYPE[data.type];
  return data;
}
/**
 * showdoc
 * @catalog v1/课程
 * @title 课程列表
 * @description 课程列表接口
 * @method GET
 * @url  /master/course/
 * @param  page 0 Int 页码: 不传默认取第1页数据，每页20条数据
 * @return {"code":0, "count":1, "data": []}
 * @return_param  id integer id
 * @return_param  title string 标题
 * @return_param  desc string 描述
 * @return_param  detailimg string 详情大图
 * @return_param  listimg string 描述
 * @return_param  teacherId integer 讲师
 * @return_param  recordId integer 录播讲师
 * @return_param  oprice decimal 原价
 * @return_param  price decimal 现价
 * @return_param  discountmsg string 优惠信息
 * @return_param  type tinyint 1碳资产开发2碳核算
 * @return_param  status tinyint 0草稿1已发布2下线
 * @return_param  weight integer 权重
 * @return_param  richText text 富文本
 * @return_param  createdAt date -
 * @return_param  updatedAt date -
 * @remark
 * @number
 */
router.get('/', async (req, res) => {
  const { page = 0 } = req.query;
  const where = _.omit(req.query, ['page']);
  const info = onSuccess();
  info.data = await Course.findAll({ where, limit, offset: page * limit });

  info.data = await fill(info.data, fillSingle);
  if (!page) {
    info.count = await Course.count({ where });
  }
  res.send(info);
});
/**
 * showdoc
 * @catalog v1/课程
 * @title 课程详情
 * @description
 * @method GET
 * @url  /master/course/:id
 * @param  :id 1 STRING 详情ID
 * @return {"code":0, "data": {}}
 * @return_param  id integer id
 * @return_param  title string 标题
 * @return_param  desc string 描述
 * @return_param  detailimg string 详情大图
 * @return_param  listimg string 描述
 * @return_param  teacherId integer 讲师
 * @return_param  recordId integer 录播讲师
 * @return_param  oprice decimal 原价
 * @return_param  price decimal 现价
 * @return_param  discountmsg string 优惠信息
 * @return_param  type tinyint 1碳资产开发2碳核算
 * @return_param  status tinyint 0草稿1已发布2下线
 * @return_param  weight integer 权重
 * @return_param  richText text 富文本
 * @return_param  createdAt date -
 * @return_param  updatedAt date -
 * @remark
 * @number
 */
router.get('/:id', async (req, res) => {
  let data = await Course.findOne({ where: req.params });
  data = await fill(data, fillSingle);
  res.send(onSuccess(data));
});
/**
 * showdoc
 * @catalog v1/课程
 * @title 课程添加
 * @description
 * @method POST
 * @url  /master/course/
 * @param  title  string 标题
 * @param  desc  string 描述
 * @param  detailimg  string 详情大图
 * @param  listimg  string 描述
 * @param  teacherId  integer 讲师
 * @param  recordId  integer 录播讲师
 * @param  oprice  decimal 原价
 * @param  price  decimal 现价
 * @param  discountmsg  string 优惠信息
 * @param  type  tinyint 1碳资产开发2碳核算
 * @param  status  tinyint 0草稿1已发布2下线
 * @param  weight  integer 权重
 * @param  richText  text 富文本
 * @return {"code":0, "data": {}}
 * @remark
 * @number
 */
router.post('/', check([body([]).notEmpty()]), async (req, res) => {
  const data = await Course.create(req.body);
  res.send(onSuccess(data));
});
/**
 * showdoc
 * @catalog v1/课程
 * @title 课程上线下线
 * @description
 * @method PUT
 * @url  /master/course/status/:id
 * @param status  1 number 1上线2下线
 * @return {"code":0, "msg": "修改成功"}
 * @remark
 * @number
 */
router.put('/status/:id', async (req, res) => {
  const { status } = req.body;
  const { id } = req.params;
  // eslint-disable-next-line eqeqeq
  if (status == 1) {
    req.body.publishAt = new Date();
    const vcount = await Chapter.count({ where: { cid: id } });
    if (!vcount) {
      return onError('请上传视频后再发布');
    }
  }

  const data = await Course.update(req.body, { where: { id }, limit: 1 });
  res.send(onSuccess(null, '修改成功'));
});
/**
 * showdoc
 * @catalog v1/课程
 * @title 课程修改
 * @description
 * @method PUT
 * @url  /master/course/:id
 * @param  :id 1 STRING 详情ID
 * @param title  string 标题
 * @param desc  string 描述
 * @param detailimg  string 详情大图
 * @param listimg  string 描述
 * @param teacherId  integer 讲师
 * @param recordId  integer 录播讲师
 * @param oprice  decimal 原价
 * @param price  decimal 现价
 * @param discountmsg  string 优惠信息
 * @param type  tinyint 1碳资产开发2碳核算
 * @param status  tinyint 0草稿1已发布2下线
 * @param weight  integer 权重
 * @param richText  text 富文本
 * @return {"code":0, "msg": "修改成功"}
 * @remark
 * @number
 */
router.put('/:id', async (req, res) => {
  const data = await Course.update(req.body, { where: req.params, limit: 1 });
  res.send(onSuccess(null, '修改成功'));
});

/**
 * showdoc
 * @catalog v1/课程
 * @title 课程删除
 * @description
 * @method DELETE
 * @url  /master/course/:id
 * @param  :id 1 STRING 详情ID
 * @return {"status":0, "msg": "删除成功"}
 * @remark
 * @number
 */
router.delete('/:id', async (req, res) => {
  const data = await Course.destroy({ where: req.params, limit: 1 });
  res.send(onSuccess(null, '删除成功'));
});

module.exports = router;