const express = require('express');
const User = require('../models/user');
const Reserve = require('../models/reserve');
const { verifyToken } = require('./middlewares');

const router = express.Router();

router.post('/', function (req, res, next) {
  console.log('/reserve post req.body', req.body)

  let num = req.body.students.length + 1;
  for (let ele of req.body.students) {
    if (ele.member === '') {
      num -= 1;
    };
  };

  if (req.body.roomInfo > num) return res.status(404).json({ error: "사용할 강의실의 최소 인원을 맞춰주세요." })

  const reserve = new Reserve({
    user: req.body._id,
    date: req.body.date,
    starttime: Number(req.body.starttime),
    usetime: Number(req.body.usetime),
    start: `${req.body.date}T` + `${req.body.starttime}:00:00`,
    end: `${req.body.date}T` + `${Number(req.body.starttime) + Number(req.body.usetime)}:00:00`,
    room: req.body.room,
    reason: req.body.reason,
    students: req.body.students,
    approve: true,
    check: true,
    num: req.body.students.length + 1,
  });

  Reserve.find({ room: req.body.room, approve: true }, function (err, reserves) {
    if (err) return res.status(500).json({ error: err });

    if (!reserves) {
      reserve.save()
        .then((result) => {
          console.log(result);
          res.status(201).json(result);
        })
        .catch((err) => {
          console.error(err);
          next(err);
        });
    }
    const strt = new Date(reserve.start)
    const endt = new Date(reserve.end)
    const reserveArr = reserves.map(item => (
      (strt >= new Date(item.start) && strt < new Date(item.end)) ||
        (endt > new Date(item.start) && endt <= new Date(item.end)) ?
        "item" :
        null
    ))
    console.log("array", reserveArr)
    if (!reserveArr.includes("item")) {
      reserve.save()
        .then((result) => {
          console.log(result);
          res.status(201).json(reserves);
        })
        .catch((err) => {
          console.error(err);
          next(err);
        });
    }
    else return res.status(404).json({ error: "다른 시간을 선택해주세요." })
  })

});

router.get('/room/:room', function (req, res, next) {
  console.log('reserves get room req.params', req.params)
  Reserve.find({ room: req.params.room, approve: true }, function (err, reserve) {
    if (err) return res.status(500).json({ error: err });
    console.log('reserve room list', reserve);
    res.status(201).json(reserve);
  })
})

router.get('/:_id', verifyToken, function (req, res, next) {
  console.log('/reserves get req.params', req.params)
  Reserve.find({ user: req.params._id }, function (err, reserve) {
    if (err) return res.status(500).json({ error: err });
    // console.log(reserve, Date.now())
    const reserves = reserve.map(item => (
      new Date(item.end) >= Date.now() ? item : ""
    ));

    if (!reserves) {
      console.log("no신청")
      res.status(404).json({ error: "신청내역이 없습니다." })
    }
    console.log("reserves", reserves)
    res.status(201).json(reserves);
  })
});

router.get('/admin/:_id', verifyToken, function (req, res, next) {
  console.log('/reserves/admin get req.params', req.params)
  Reserve.find({ approve: false }).populate('user').exec(function (err, reserve) {
    if (err) return res.status(500).json({ error: err });
    console.log('reserve list', reserve)
    res.status(201).json(reserve);
  })
});

router.delete('/:_id', function (req, res, next) {
  console.log('/reserves delete req.params', req.params)
  Reserve.findOne({ _id: req.params._id }, function (err, reserve) {
    if (err) return res.status(500).json({ error: err });

    reserve.remove()
      .then(() => {
        console.log();
        res.status(201).json();
      })
      .catch((err) => {
        console.error(err);
        next(err);
      });
  })
});

router.put('/:id', function (req, res, next) {
  console.log('/reserves put req.body', req.params)
  Reserve.findOne({ _id: req.params.id }, 'check approve', function (err, reserve) {
    if (err) return res.status(500).json({ error: err });
    reserve.check = true;
    reserve.approve = req.body.approve;
    reserve.save()
      .then((result) => {
        console.log(result);
        res.status(201).json(result);
      })
      .catch((err) => {
        console.error(err);
        next(err);
      });
  });
});

module.exports = router;