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


module.exports.create = [
  [
    body('fa_title')
       .notEmpty().withMessage(_sr['fa'].required.title)
       .bail()
       .custom((value, {req}) => {
         return BlogCategory.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 BlogCategory.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),
  (req, res) => {
    const {fa_title, en_title, fa_description, en_description} = req.body
    const data = {
      locale: {
        fa: {
          title: fa_title,
          description: fa_description
        },
        en: {
          title: en_title,
          description: en_description
        }
      }
    }
    const category = new BlogCategory(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) => {
    BlogCategory.find({}, (err, categories) => {
      if (err) return res500(res, err)
      else return res.json(categories)
    })
  }
]

module.exports.getOne = [
  (req, res) => {
    BlogCategory.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 BlogCategory.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 BlogCategory.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),
  (req, res) => {
    const {fa_title, en_title, fa_description, en_description} = req.body
    const data = {
      locale: {
        fa: {
          title: fa_title,
          description: fa_description
        },
        en: {
          title: en_title,
          description: en_description
        }
      }
    }
    BlogCategory.findByIdAndUpdate(req.params.id, data, (err, oldData) => {
      if (err || !oldData) return res404(res, err)
      else return res.json({message: _sr['fa'].response.success_save})
    })
  }
]

module.exports.delete = [
  async (req, res) => {
    try {
      const posts = await BlogPost.find({category: req.params.id})
      if (posts.length) return res.status(403).json({message: 'Can not remove categories that have posts.'})
      BlogCategory.findByIdAndRemove(req.params.id, (err, oldData) => {
        if (err || !oldData) return res404(res, err)
        else return res.json({message: _sr['fa'].response.success_remove})
      })
    } catch (e) {
      return res500(res, e)
    }
  }
]