import fs from 'fs'
import { HttpError } from '../error.mjs'
import formidable from 'formidable'
import config from '../config.mjs'

export function uploadFile(ctx, siteName) {
  return new Promise((res, rej) => {
    const date = new Date()

    // Generate 'YYYYMMDD_HHMMSS_' prefix
    const prefix = date
      .toISOString()
      .replace(/-/g, '')
      .replace('T', '_')
      .replace(/:/g, '')
      .replace(/\..+/, '_')

    var form = new formidable.IncomingForm()
    form.uploadDir = `./public/${siteName}`
    form.maxFileSize = config.get('fileSize')

    form.parse(ctx.req, function(err, fields, files) {
      if (err) return rej(err)
      if (!files || !files.file) return rej(new HttpError('File in body was missing', 422))
      let file = files.file

      fs.rename(files.file.path, `./public/${siteName}/${prefix}${file.name}`, function(err) {
        if (err) return rej(err)
        file.path = `./public/${siteName}/${prefix}${file.name}`
        file.filename = `${prefix}${file.name}`

        return res(file)
      })
    })
  })
}