/**
 * Created by zhengguorong on 16/11/4.
 */
var jsonpatch = require('fast-json-patch')
var Pages = require('./pages.model')
var tools = require('../../util/tools')

const respondWithResult = (res, statusCode) => {
  statusCode = statusCode || 200
  return function (entity) {
    if (entity) {
      return res.status(statusCode).json(entity)
    }
    return null
  }
}

const patchUpdates = (patches) => {
  return function (entity) {
    try {
      jsonpatch.apply(entity, patches, true)
    } catch (err) {
      return Promise.reject(err)
    }

    return entity.save()
  }
}

const removeEntity = (res) => {
  return function (entity) {
    if (entity) {
      return entity.remove()
        .then(() => {
          res.status(204).end()
        })
    }
  }
}

const handleEntityNotFound = (res) => {
  return function (entity) {
    if (!entity) {
      res.status(404).end()
      return null
    }
    return entity
  }
}

const handleError = (res, statusCode) => {
  statusCode = statusCode || 500
  return function (err) {
    res.status(statusCode).send(err)
  }
}

module.exports.index = (req, res) => {
  return Pages.find().exec()
    .then(respondWithResult(res))
    .catch(handleError(res))
}

module.exports.findByLoginId = (req, res) => {
  var loginId = req.user.loginId
  var type = req.query.type;
  return Pages.find({ loginId: loginId, type: type }).exec()
    .then(respondWithResult(res))
    .catch(handleError(res))
}

// Gets a single Pages from the DB
module.exports.show = (req, res) => {
  return Pages.findById(req.params.id).exec()
    .then(handleEntityNotFound(res))
    .then(respondWithResult(res))
    .catch(handleError(res))
}

// Creates a new Pages in the DB
module.exports.create = (req, res) => {
  //添加作者信息
  req.body.loginId = req.user.loginId
  return Pages.create(req.body)
    .then(respondWithResult(res, 201))
    .catch(handleError(res))
}

// Upserts the given Pages in the DB at the specified ID
module.exports.update = (req, res) => {
  if (req.body._id) {
    delete req.body._id
  }
  if (req.body.type === 'h5') {
    tools.renderFile('template.html', req.body, (html) => {
      tools.saveFile(req.params.id + '.html', html)
    })
  } else if (req.body.type === 'spa') {
    tools.renderFile('spa.html', req.body, (html) => {
      tools.saveFile(req.params.id + '.html', html)
    })
  }

  return Pages.findOneAndUpdate({ _id: req.params.id }, req.body, { upsert: true, setDefaultsOnInsert: true, runValidators: true }).exec()
    .then(respondWithResult(res))
    .catch(handleError(res))
}


// Updates an existing Pages in the DB
module.exports.patch = (req, res) => {
  if (req.body._id) {
    delete req.body._id
  }
  return Pages.findById(req.params.id).exec()
    .then(handleEntityNotFound(res))
    .then(patchUpdates(req.body))
    .then(respondWithResult(res))
    .catch(handleError(res))
}

// Deletes a Pages from the DB
module.exports.destroy = (req, res) => {
  return Pages.findById(req.params.id).exec()
    .then(handleEntityNotFound(res))
    .then(removeEntity(res))
    .catch(handleError(res))
}