const express = require('express');
const _ = require('lodash');
const { query, body } = require('express-validator');
const { onSuccess, fill } = require('../../../utils');
const { deleteVideo } = require('../../../utils/qiniu');
const { limit } = require('../../config');
const check = require('../../../middleware/check');
const Chapter = require('../../../db/models/chapter');

const router = express.Router();

async function fillSingle(data) {
  return data;
}
/**
 * showdoc
 * @catalog v1/章节
 * @title 章节列表
 * @description 章节列表接口
 * @method GET
 * @url  /master/chapter/
 * @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  cid integer 课程id
 * @return_param  title string 标题
 * @return_param  status tinyint 状态
 * @return_param  video string 视频
 * @return_param  weight integer 权重
 * @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 Chapter.findAll({ where, limit, offset: page * limit });

  info.data = await fill(info.data, fillSingle);
  if (!page) {
    info.count = await Chapter.count({ where });
  }
  res.send(info);
});
/**
 * showdoc
 * @catalog v1/章节
 * @title 章节详情
 * @description
 * @method GET
 * @url  /master/chapter/:id
 * @param  :id 1 STRING 详情ID
 * @return {"code":0, "data": {}}
 * @return_param  id integer id
 * @return_param  cid integer 课程id
 * @return_param  title string 标题
 * @return_param  status tinyint 状态
 * @return_param  video string 视频
 * @return_param  weight integer 权重
 * @return_param  createdAt date -
 * @return_param  updatedAt date -
 * @remark
 * @number
 */
router.get('/:id', async (req, res) => {
  let data = await Chapter.findOne({ where: req.params });
  data = await fill(data, fillSingle);
  res.send(onSuccess(data));
});
/**
 * showdoc
 * @catalog v1/章节
 * @title 章节添加
 * @description
 * @method POST
 * @url  /master/chapter/
 * @param  cid  integer 课程id
 * @param  title  string 标题
 * @param  status  tinyint 状态
 * @param  video  string 视频
 * @param  weight  integer 权重
 * @return {"code":0, "data": {}}
 * @remark
 * @number
 */
router.post('/', check([body([]).notEmpty()]), async (req, res) => {
  const data = await Chapter.create(req.body);
  res.send(onSuccess(data));
});
/**
 * showdoc
 * @catalog v1/焦点图
 * @title 焦点图排序
 * @description
 * @method PUT
 * @url  /master/banner/sort
 * @param data  1 array idlist
 * @return {"code":0, "msg": "修改成功"}
 * @remark
 * @number
 */
router.put('/sort', async (req, res) => {
  for (const i in req.body.data) {
    await Chapter.update({ weight: i }, { where: { id: req.body.data[i] }, limit: 1 });
  }
  res.send(onSuccess(null, '修改成功'));
});
/**
 * showdoc
 * @catalog v1/章节
 * @title 章节修改
 * @description
 * @method PUT
 * @url  /master/chapter/:id
 * @param  :id 1 STRING 详情ID
 * @param cid  integer 课程id
 * @param title  string 标题
 * @param status  tinyint 状态
 * @param video  string 视频
 * @param weight  integer 权重
 * @return {"code":0, "msg": "修改成功"}
 * @remark
 * @number
 */
router.put('/:id', async (req, res) => {
  const data = await Chapter.update(req.body, { where: req.params, limit: 1 });
  res.send(onSuccess(null, '修改成功'));
});

/**
 * showdoc
 * @catalog v1/章节
 * @title 章节删除
 * @description
 * @method DELETE
 * @url  /master/chapter/: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 Chapter.findOne({ where: req.params });
  await Chapter.destroy({ where: req.params, limit: 1 });
  deleteVideo(data.video);
  res.send(onSuccess(null, '删除成功'));
});

module.exports = router;