const { body, param, validationResult } = require('express-validator')
const { checkValidations } = require('../plugins/controllersHelperFunctions')
const User = require('../models/GPS.User')
const InstalledDevice = require('../models/GPS.InstalledDevice')
const Device = require('../models/GPS.Device')
const userGPS = require('../models/GPS.User')
const Score = require('../models/GPS.Score')
const { _sr } = require('../plugins/serverResponses')
const { notifyAdmin } = require('../WebSocket/controllers/admin_EventsController')
const { isDeviceRegisteredOnKoja } = require('../kojaWebService')

module.exports.deviceRegistration = [
  [body('IMEI').notEmpty().isString().withMessage('لطفا IMEI را وارد یا تصحیح کنید')],
  checkValidations(validationResult),
  async (req, res) => {
    const IMEI = req.body.IMEI

    try {
      const device = await Device.findOne({ IMEI })
      if (!device) {
        return res.status(404).json({ msg: 'این IMEI وجود ندارد' })
      }
      if (device.status === 1) {
        return res.status(400).json({ msg: 'این IMEI قبلا ثبت شده ' })
      }
      const isRegistered = await isDeviceRegisteredOnKoja(IMEI)

      if (isRegistered) {
        let installedDeviceId = null
        try {
          const data = {
            deviceId: device.id,
            status: 0,
            registerDate: new Date(),
            userId: req.user_id,
            IMEI: req.body.IMEI
          }
          // 1.add to installed device
          const installedDevice = await InstalledDevice.create(data)
          installedDeviceId = installedDevice._id
          // 2. change status
          await Device.findOneAndUpdate({ IMEI }, { status: 1 })

          // 3. add to wallet
          await userGPS.findByIdAndUpdate(req.user_id, { $inc: { walletBalance: 100_000 } })

          notifyAdmin('newInstallDeviceRequest')
          res.status(201).json({ msg: 'مبلغ صد هزار تومان به کیف پول شما اضافه شد' })
        } catch (err) {
          console.log('Error in Db Transactions', err?.message)
          if (installedDeviceId) {
            try {
              await InstalledDevice.deleteOne({ _id: installedDeviceId })
              console.log('Rollback 1/2: InstalledDevice deleted.')
              await Device.findOneAndUpdate({ IMEI }, { status: 0 })
              console.log('Rollback 2/2: Device status reset to 0.')
            } catch (error) {
              console.error('CRITICAL: Rollback failed for some changes. MANUAL INTERVENTION REQUIRED.', error)
            }
          }
          return res.status(err?.status || 500).json({ msg: err?.msg || 'خطا در تراکنش های دیتابیس ' })
        }
      } else {
        res.status(400).json({ msg: 'هنوز در سامانه ردیاب ثبت نشده است.' })
      }
    } catch (err) {
      console.log('deviceRegistration Error: ', err?.message)
      if (err.response) {
        const { status } = err.response
        return res.status(status || 500).json({ msg: err.message || 'خطا!' })
      }
      return res.status(err.status || 500).json({ msg: err.msg || 'خطا در ثبت دستگاه' })
    }
  }
]

module.exports.getAllForUser = async (req, res) => {
  let page
  let rows

  if (!req.query?.rows || req.query?.rows <= 5) {
    rows = 10
  } else {
    rows = parseInt(req.query.rows)
  }

  if (!req.query?.page || req.query.page <= 1) {
    page = 0
  } else {
    page = (req.query.page - 1) * rows
  }

  const search = req.query?.search || null

  let sort = {}

  // if (req.query?.deviceId_dollarProfit) {
  //   sort.dollarProfit = parseInt(req.query.deviceId_dollarProfit)
  // }
  if (req.query?.status) {
    sort.status = parseInt(req.query.status)
  }
  if (req.query?.registerDate) {
    sort.registerDate = parseInt(req.query.registerDate)
  }

  if (Object.keys(sort).length === 0) {
    sort = { created_at: -1 }
  }

  const filter = {
    userId: req.user_id
  }

  if (search) {
    filter.$or = [{ IMEI: { $regex: search, $options: 'i' } }]
  }

  try {
    const data = await InstalledDevice.find(filter).skip(page).limit(rows).sort(sort).populate('deviceId')

    const total = await InstalledDevice.countDocuments(filter)

    res.status(200).json({ data, total })
  } catch (error) {
    res.status(500).json({ message: 'An error occurred', error })
  }
}

module.exports.getAllForAdmin = async (req, res) => {
  try {
    // const page = parseInt(req.query.page) || 1;
    // const rows = parseInt(req.query.rows) || 10;
    // const search = req.query.search || "";
    // const sortField = req.query.sortField || "status";
    // const sortOrder = req.query.sortOrder === "desc" ? -1 : 1;

    // const skip     = (page - 1) * rows;

    // const filter = {};
    // if (search) {
    //     filter.$or = [
    //         { IMEI: new RegExp(search, 'i') },
    //         { 'userId.shopName': new RegExp(search, 'i') },
    //         { 'userId.national_code': new RegExp(search, 'i') },
    //     ];
    // }

    const data = await InstalledDevice.find()
      //   .sort({ [sortField]: sortOrder })
      .populate('deviceId')
      .populate('userId', 'shopName national_code first_name last_name mobile_number city_name province_name')
    //   .skip(skip)
    //   .limit(rows);

    // const totalDocuments = await InstalledDevice.countDocuments(filter);
    // const totalPages = Math.ceil(totalDocuments / rows);

    res.status(200).json({ data })
  } catch (error) {
    console.error('Error:', error.message)
    res.status(500).json({ message: 'Server Error', error: error.message })
  }
}

module.exports.updateInstalled = [
  [
    param('id').notEmpty().isMongoId().withMessage('لطفا ایدی را وارد یا تصحیح کنید'),
    param('type').notEmpty().isString().withMessage('لطفا وضعیت را وارد یا تصحیح کنید')
  ],
  checkValidations(validationResult),
  async (req, res) => {
    const installedDevice = await InstalledDevice.findById(req.params.id)
    if (!installedDevice) {
      return res.status(404).json({ msg: 'این ایدی وجود ندارد' })
    } else {
      const user = await User.findById(installedDevice.userId).select('walletBalance score totalScore')
      const device = await Device.findById(installedDevice.deviceId)
      switch (req.params.type) {
        case 'accept': {
          installedDevice.status = 1
          installedDevice.installationDate = new Date()
          device.status = 1

          user.walletBalance += device.profit
          // user.dollarBalance += device.dollarProfit
          user.totalScore += device.score
          user.score += device.score

          await Score.create({
            title: 'ثبت دستگاه',
            deviceId: device.id,
            score: device.score,
            userId: installedDevice.userId
          })
          user.save()
          device.save()
          installedDevice.save()
          notifyAdmin('newInstallDeviceRequest')

          res.status(201).json({ msg: _sr.fa.response.success_save, data: installedDevice })

          break
        }
        case 'reject': {
          installedDevice.status = 2
          installedDevice.save()
          device.status = 0
          device.save()
          notifyAdmin('newInstallDeviceRequest')

          res.status(201).json({ msg: _sr.fa.response.success_save, data: installedDevice })

          break
        }
        default: {
          res.status(404).json({ msg: 'وضعیت اشتباه است' })
          break
        }
      }
    }
  }
]