/* eslint-disable
    camelcase,
    no-unused-vars,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
let FileController
const PersistorManager = require('./PersistorManager')
const settings = require('settings-sharelatex')
const logger = require('logger-sharelatex')
const FileHandler = require('./FileHandler')
const metrics = require('metrics-sharelatex')
const parseRange = require('range-parser')
const Errors = require('./Errors')

const oneDayInSeconds = 60 * 60 * 24
const maxSizeInBytes = 1024 * 1024 * 1024 // 1GB

module.exports = FileController = {
  getFile(req, res) {
    const { key, bucket } = req
    const { format, style } = req.query
    const options = {
      key,
      bucket,
      format,
      style
    }
    metrics.inc('getFile')
    logger.log({ key, bucket, format, style }, 'receiving request to get file')
    if (req.headers.range != null) {
      const range = FileController._get_range(req.headers.range)
      options.start = range.start
      options.end = range.end
      logger.log(
        { start: range.start, end: range.end },
        'getting range of bytes from file'
      )
    }
    return FileHandler.getFile(bucket, key, options, function(err, fileStream) {
      if (err != null) {
        if (err instanceof Errors.NotFoundError) {
          return res.send(404)
        } else {
          logger.err(
            { err, key, bucket, format, style },
            'problem getting file'
          )
          return res.send(500)
        }
      } else if (req.query.cacheWarm) {
        logger.log(
          { key, bucket, format, style },
          'request is only for cache warm so not sending stream'
        )
        return res.send(200)
      } else {
        logger.log({ key, bucket, format, style }, 'sending file to response')
        return fileStream.pipe(res)
      }
    })
  },

  getFileHead(req, res) {
    const { key, bucket } = req
    metrics.inc('getFileSize')
    logger.log({ key, bucket }, 'receiving request to get file metadata')
    return FileHandler.getFileSize(bucket, key, function(err, fileSize) {
      if (err != null) {
        if (err instanceof Errors.NotFoundError) {
          res.status(404).end()
        } else {
          res.status(500).end()
        }
        return
      }
      res.set('Content-Length', fileSize)
      return res.status(200).end()
    })
  },

  insertFile(req, res) {
    metrics.inc('insertFile')
    const { key, bucket } = req
    logger.log({ key, bucket }, 'receiving request to insert file')
    return FileHandler.insertFile(bucket, key, req, function(err) {
      if (err != null) {
        logger.log({ err, key, bucket }, 'error inserting file')
        return res.send(500)
      } else {
        return res.send(200)
      }
    })
  },

  copyFile(req, res) {
    metrics.inc('copyFile')
    const { key, bucket } = req
    const oldProject_id = req.body.source.project_id
    const oldFile_id = req.body.source.file_id
    logger.log(
      { key, bucket, oldProject_id, oldFile_id },
      'receiving request to copy file'
    )
    return PersistorManager.copyFile(
      bucket,
      `${oldProject_id}/${oldFile_id}`,
      key,
      function(err) {
        if (err != null) {
          if (err instanceof Errors.NotFoundError) {
            return res.send(404)
          } else {
            logger.log(
              { err, oldProject_id, oldFile_id },
              'something went wrong copying file'
            )
            return res.send(500)
          }
        } else {
          return res.send(200)
        }
      }
    )
  },

  deleteFile(req, res) {
    metrics.inc('deleteFile')
    const { key, bucket } = req
    logger.log({ key, bucket }, 'receiving request to delete file')
    return FileHandler.deleteFile(bucket, key, function(err) {
      if (err != null) {
        logger.log({ err, key, bucket }, 'something went wrong deleting file')
        return res.send(500)
      } else {
        return res.send(204)
      }
    })
  },

  _get_range(header) {
    const parsed = parseRange(maxSizeInBytes, header)
    if (parsed === -1 || parsed === -2 || parsed.type !== 'bytes') {
      return null
    } else {
      const range = parsed[0]
      return { start: range.start, end: range.end }
    }
  },

  directorySize(req, res) {
    metrics.inc('projectSize')
    const { project_id, bucket } = req
    logger.log({ project_id, bucket }, 'receiving request to project size')
    return FileHandler.getDirectorySize(bucket, project_id, function(
      err,
      size
    ) {
      if (err != null) {
        logger.log({ err, project_id, bucket }, 'error inserting file')
        return res.send(500)
      } else {
        return res.json({ 'total bytes': size })
      }
    })
  }
}