import * as path from 'path'
import * as fs from 'fs'

import { wrapper, TypeToolProp, TypeOnEveryFile, TypeOnBody, TypeToolOptions } from '@asset-toolkit/core'
import { exiftool } from 'exiftool-vendored'

export interface TypeProps extends TypeToolOptions {}

/**
 * A tool to extract exif data to json file.
 * https://photostructure.github.io/exiftool-vendored.js/
 * @param props - { pathIn, pathOut }
 * @param options - { raw, tags }
 * @returns { Promise(returns) }
 */
const exifExtractor: (_props: TypeToolProp, options?: TypeProps) => Promise<unknown> = wrapper(
  ({ pathIn, pathOut, file, next, log }: TypeOnEveryFile) => {
    exiftool
      .read(path.resolve(pathIn || pathOut, file))
      .then((tags: any) => {
        fs.writeFile(path.resolve(pathOut, file + '.json'), JSON.stringify(tags, null, ' '), {}, () => {
          log(file + '.json')
          next()
        })
      })
      .catch((err: any) => console.error('Something terrible happened: ', err))
  },
  ({ log }: TypeOnBody) =>
    new Promise<void>(resolve => {
      exiftool.end()
      resolve()
    }),
  { name: 'Exif Extractor' },
)

export default exifExtractor