const Slide = require('../models/Slide')
const {body, validationResult} = require('express-validator')
const sharp = require('sharp')
const fs = require('fs')
const {_sr} = require('../plugins/serverResponses')
const {res404, re500} = require('../plugins/controllersHelperFunctions')

////// variables
const maxCaptionLength = 65

const slideImageWidth = 1920
const slideImageHeight = 1080
const slideImageQuality = 100

//////////////////////////////////////////////////////////////////////////////// create
module.exports.create = [
  async (req, res) => {
    if (!req.files || !req.files.image) return res.status(422).json({validation: {image: {msg: _sr['fa'].required.image}}})
    if (req.files && req.files.image && !_sr.supportedImageFormats.includes(req.files.image.mimetype.split('/')[1])) return res.status(422).json({validation: {image: {msg: _sr['fa'].format.image}}})

    let image = req.files.image
    let imageName = 'slide_' + Date.now() + '.' + image.mimetype.split('/')[1]

    const data = {
      caption: req.body.caption.slice(0, maxCaptionLength),
      image: imageName
    }
    try {
      const target = sharp(image.data)
      await target
         .resize(slideImageWidth, slideImageHeight, {fit: 'cover'})
         .jpeg({quality: slideImageQuality})
         .toFile(`./static/uploads/images/slider/${imageName}`)
    } catch (e) {
      return res500(res, e)
    }

    const slider = new Slide(data)
    slider.save((err, data) => {
      if (err) return res500(res, err)
      return res.json({message: _sr['fa'].response.success_save})
    })
  }
]

//////////////////////////////////////////////////////////////////////////////// get all
module.exports.getAll = [
  (req, res) => {
    Slide.find({}, (err, slides) => {
      if (err) return res500(res, err)
      return res.json(slides)
    })
  }
]

//////////////////////////////////////////////////////////////////////////////// get one
module.exports.getOne = [
  (req, res) => {
    Slide.findById(req.params.id, (err, slide) => {
      if (err || !slide) return res404(res, err)
      return res.json(slide)
    })
  }
]

//////////////////////////////////////////////////////////////////////////////// update
module.exports.update = [
  async (req, res) => {
    if (req.files && req.files.image && !_sr.supportedImageFormats.includes(req.files.image.mimetype.split('/')[1])) return res.status(422).json({validation: {image: {msg: _sr['fa'].format.image}}})

    const data = {caption: req.body.caption.slice(0, maxCaptionLength)}

    if (req.files && req.files.image) {
      let image = req.files.image
      let imageName = 'slide_' + Date.now() + '.' + image.mimetype.split('/')[1]
      data.image = imageName
      try {
        const target = sharp(image.data)
        await target
           .resize(slideImageWidth, slideImageHeight, {fit: 'cover'})
           .jpeg({quality: slideImageQuality})
           .toFile(`./static/uploads/images/slider/${imageName}`)
      } catch (e) {
        return res500(res, e)
      }
    }

    Slide.findByIdAndUpdate(req.params.id, data, (err, oldSlide) => {
      if (err || !oldSlide) return res404(res, err)
      if (req.files && req.files.image) {
        fs.unlink(`./static/${oldSlide.image}`, err => {
          if (err) console.log(err)
        })
      }
      return res.json({message: _sr['fa'].response.success_save})
    })
  }
]

//////////////////////////////////////////////////////////////////////////////// delete
module.exports.delete = [
  (req, res) => {
    Slide.findByIdAndRemove(req.params.id, (err, data) => {
      if (err || !data) return res404(res, err)
      fs.unlink(`./static/${data.image}`, err => {
        if (err) console.log(err)
      })
      return res.json({message: _sr['fa'].response.success_remove})
    })
  }
]