const vegetables = require('../models').vegetables
const VegetableTypes = require('./VegetableTypes')
const uuid = require('uuid/v4')
const multer = require('multer')
const path = require('path')
const fs = require('fs')
const Aws = require('../libs/aws')

class Vegetables {
  constructor () {
    this._upload = multer({
      storage: multer.diskStorage({}),
      fileFilter: function (req, file, cb) {
        const filetypes = /jpg|jpeg|png|JPG|JPEG|PNG/
        const mimetype = filetypes.test(file.mimetype)
        const extname = filetypes.test(path.extname(file.originalname).toLowerCase())

        if (mimetype && extname) {
          return cb(null, true)
        }
        cb(new Error('Error: File upload only supports the following filetypes - ' + filetypes))
      }
    }).single('mainPicture')
  }

  _createItem (req, callback) {
    let newItem = req.body
    newItem.vegetableTypeId = req.params.vegetableTypesId

    vegetables.create(newItem)
      .then(item => {
        callback(null, item)
      })
      .catch(e => {
        callback(e, null)
      })
  }

  _patchOne (item, values, callback) {
    item.update(values)
      .then(item => {
        callback(null, item)
      })
      .catch(e => {
        callback(e, null)
      })
  }

  _deleteOne (item, req, callback) {
    vegetables.destroy({
      where: {
        id: req.params.vegetablesId
      }
    })
      .then(deleted => {
        if (deleted === 0) {
          callback(new Error('Error when trying to delete item'))
          return false
        }

        callback(null, null)
      })
      .catch(e => {
        callback(e, null)
      })
  }

  _deleteMedias (path, callback) {
    const aws = new Aws()
    if (!callback) {
      callback = (e) => {
        if (e) {
          console.error(e)
        }
      }
    }

    aws.deleteObjects([path], callback)
  }

  static getAll (req, callback) {
    vegetables.findAndCountAll({
      where: {
        vegetableTypeId: req.params.vegetableTypesId
      },
      order: [
        ['name', 'ASC']
      ]
    })
      .then(items => {
        if (!items) {
          callback(new Error('No vegetable found'), 204)
          return false
        }
        callback(null, items)
      })
      .catch((e) => {
        callback(e, null)
      })
  }

  createOne (req, callback) {
    VegetableTypes.getOne(req, (err, universe) => {
      if (err) {
        callback(err, universe)
        return false
      }

      this._upload(req, req.body, (err) => {
        if (err) {
          callback(err, null)
          return false
        }

        if (req.file) {
          let aws = new Aws()
          aws.upload({
            path: req.file.path,
            filename: `main_${uuid()}.${req.file.originalname.split('.')[req.file.originalname.split('.').length - 1]}`
          }, (err, res) => {
            if (!err) { req.body.mainPicture = res.file }
            this._createItem(req, callback)
            fs.unlink(req.file.path, () => {})
          })
        } else {
          this._createItem(req, callback)
        }
      })
    })
  }

  static getOne (req, callback) {
    vegetables.find({
      where: {
        vegetableTypeId: req.params.vegetableTypesId,
        id: req.params.vegetablesId
      },
      include: ['Type']
    })
      .then(item => {
        if (!item) {
          callback(new Error('Vegetable not found'), 404)
          return false
        }
        callback(null, item)
      })
      .catch((e) => {
        callback(e, null)
      })
  }

  patchOne (req, callback) {
    Vegetables.getOne(req, (err, item) => {
      if (err) {
        callback(err, item)
        return false
      }

      this._upload(req, req.body, (err) => {
        if (err) {
          callback(err, null)
          return false
        }

        let values = req.body

        if (req.file) {
          let aws = new Aws()

          if (item.mainPicture !== null && item.mainPicture !== '') {
            this._deleteMedias(item.mainPicture)
          }

          aws.upload({
            path: req.file.path,
            filename: `main_${req.params.vegetablesId}${path.extname(req.file.originalname).toLowerCase()}`
          }, (err, res) => {
            if (!err) {
              values.mainPicture = res.file
            }
            this._patchOne(item, values, callback)
            fs.unlink(req.file.path, () => {})
          })
        } else {
          this._patchOne(item, values, callback)
        }
      })
    })
  }

  deleteOne (req, callback) {
    Vegetables.getOne(req, (err, item) => {
      if (err) {
        callback(err, item)
        return false
      }

      if (item.mainPicture !== null && item.mainPicture !== '') {
        const aws = new Aws()
        if (!callback) {
          callback = (e) => {
            if (e) {
              console.error(e)
            }
          }
        }

        this._deleteMedias(item.mainPicture, (e, res) => {
          if (e) {
            callback(e, null)
            return false
          }

          this._deleteOne(item, req, callback)
        })
      } else {
        this._deleteOne(item, req, callback)
      }
    })
  }
}

module.exports = Vegetables