const GalleryCategory = require('../models/GalleryCategory')
const Gallery = require('../models/Gallery')
const {body, validationResult} = require('express-validator')
const {res404, res500, checkValidations} = require('../plugins/controllersHelperFunctions')
const {_sr} = require('../plugins/serverResponses')
const sharp = require('sharp')
const fs = require('fs')

const imageQuality = 100
const imageThumbWidth = 500
const imageThumbHeight = 500
const imageThumbQuality = 80

module.exports.create = [
  [
    body('fa_title')
       .notEmpty().withMessage(_sr['fa'].required.title)
       .bail()
       .custom((value, {req}) => {
         return GalleryCategory.findOne({$or: [{'locale.fa.title': value}, {'locale.en.title': value}]})
            .then(category => {
              if (category) return Promise.reject(_sr['fa'].duplicated.title)
              else return true
            })
       }),

    body('en_title')
       .notEmpty().withMessage(_sr['fa'].required.title)
       .bail()
       .custom((value, {req}) => {
         return GalleryCategory.findOne({$or: [{'locale.fa.title': value}, {'locale.en.title': value}]})
            .then(category => {
              if (category) return Promise.reject(_sr['fa'].duplicated.title)
              else return true
            })
       })
  ],
  checkValidations(validationResult),
  async (req, res) => {
    const {fa_title, en_title, fa_description, en_description , index} = req.body
    if (!req.files || !req.files.cover) return res.status(422).json({validation: {cover: {msg: _sr['fa'].required.cover}}})
    if (!_sr.supportedImageFormats.includes(req.files.cover.mimetype.split('/')[1])) return res.status(422).json({validation: {cover: {msg: _sr['fa'].format.image}}})

    const image = req.files.cover
    const imageName = 'categoryIMG_' + Date.now() + '.jpg'
    const imageThumb = 'thumb_' + imageName

    const data = {
      locale: {
        fa: {
          title: fa_title,
          description: fa_description
        },
        en: {
          title: en_title,
          description: en_description
        }
      },
      index
    }

    try {
      const target = await sharp(image.data)
      await target
         .toFormat('jpg')
         .jpeg({quality: imageQuality})
         .toFile(`./static/uploads/images/galleryCover/${imageName}`)

      await target
         .resize(imageThumbWidth, imageThumbHeight, {fit: 'cover'})
         .withMetadata()
         .toFormat('jpg')
         .jpeg({quality: imageThumbQuality})
         .toFile(`./static/uploads/images/galleryCover/thumb/${imageThumb}`)

      data.cover = imageName
      data.thumb = imageThumb

    } catch (e) {
      return res500(res, e)
    }
    const category = new GalleryCategory(data)
    category.save(err => {
      if (err) return res500(res, err)
      else return res.json({message: _sr['fa'].response.success_save})
    })
  }
]

module.exports.getAll = [
  (req, res) => {
    GalleryCategory.find({}, (err, categories) => {
      if (err) return res500(res, err)
      else return res.json(categories)
    }).sort({index : 1})
  }
]

module.exports.getOne = [
  (req, res) => {
    GalleryCategory.findById(req.params.id, (err, category) => {
      if (err) return res500(res, err)
      else return res.json(category)
    })
  }
]

module.exports.update = [
  [
    body('fa_title')
       .notEmpty().withMessage(_sr['fa'].required.title)
       .bail()
       .custom((value, {req}) => {
         return GalleryCategory.findOne({$or: [{'locale.fa.title': value}, {'locale.en.title': value}]})
            .then(category => {
              if (category && category._id.toString() !== req.params.id) return Promise.reject(_sr['fa'].duplicated.title)
              else return true
            })
       }),

    body('en_title')
       .notEmpty().withMessage(_sr['fa'].required.title)
       .bail()
       .custom((value, {req}) => {
         return GalleryCategory.findOne({$or: [{'locale.fa.title': value}, {'locale.en.title': value}]})
            .then(category => {
              if (category && category._id.toString() !== req.params.id) return Promise.reject(_sr['fa'].duplicated.title)
              else return true
            })
       })
  ],
  checkValidations(validationResult),
  async (req, res) => {
    const {fa_title, en_title, fa_description, en_description,index} = req.body
    const image = req?.files?.cover

    const data = {
      locale: {
        fa: {
          title: fa_title,
          description: fa_description
        },
        en: {
          title: en_title,
          description: en_description
        }
      },
      index
    }


    if (image) {
      if (!_sr.supportedImageFormats.includes(req.files.cover.mimetype.split('/')[1])) return res.status(422).json({validation: {cover: {msg: _sr['fa'].format.image}}})


      const imageName = 'categoryIMG_' + Date.now() + '.jpg'
      const imageThumb = 'thumb_' + imageName
      try {
        const target = await sharp(image.data)
        await target
           .toFormat('jpg')
           .jpeg({quality: imageQuality})
           .toFile(`./static/uploads/images/galleryCover/${imageName}`)

        await target
           .resize(imageThumbWidth, imageThumbHeight, {fit: 'cover'})
           .withMetadata()
           .toFormat('jpg')
           .jpeg({quality: imageThumbQuality})
           .toFile(`./static/uploads/images/galleryCover/thumb/${imageThumb}`)

        data.cover = imageName
        data.thumb = imageThumb

      } catch (e) {
        return res500(res, e)
      }
    }

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

module.exports.delete = [
  async (req, res) => {
    try {
      const posts = await Gallery.find({category: req.params.id})
      if (posts.length) return res.status(403).json({message: 'Can not remove categories that have posts.'})
      GalleryCategory.findByIdAndRemove(req.params.id, (err, oldData) => {
        if (err || !oldData) return res404(res, err)
        else {

          if (oldData.cover) {
            fs.unlink(`./static/${oldData.cover}`, (err) => {
              if (err) console.log(err)
            })
            fs.unlink(`./static/${oldData.thumb}`, (err) => {
              if (err) console.log(err)
            })
          }
          return res.json({message: _sr['fa'].response.success_remove})
        }
      })
    } catch (e) {
      return res500(res, e)
    }
  }
]