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

import { wrapper, TypeOnEveryFile, TypeToolOptions, TypeToolProp } from '@asset-toolkit/core'
const { execSync } = require('child_process')

export interface TypeProps extends TypeToolOptions {
  settings?: string
  preset?: 'low' | 'medium' | 'high' | 'max'
  mipmap?: boolean
  linear?: boolean
}

/**
 * A tool to create a super compressed image, KTX2.
 * @param props - { pathIn, pathOut }
 * @param options - { }
 * @returns { Promise(returns) }
 */
const imageSuperCompression: (_props: TypeToolProp, options?: TypeProps) => Promise<unknown> = wrapper(
  ({ pathIn, pathOut, file, options, next, log }: TypeOnEveryFile) => {
    const opts = {
      settings: '-uastc -uastc_level 2 -uastc_rdo_l 1.0',
      preset: 'high',
      mipmap: true,
      linear: true,
      ...options,
    }

    if (opts.preset === 'max') opts.settings = '-uastc -uastc_level 3 -uastc_rdo_l 1.0'
    if (opts.preset === 'medium') opts.settings = '-comp_level 5 -max_endpoints 16128 -max_selectors 16128'

    if (opts.mipmap) opts.settings += ' -mipmap'
    if (opts.linear) opts.settings += ' -linear'

    log(opts.settings)

    execSync(
      `"${path.resolve(__dirname, '../bin/basisu')}" ${opts.settings} -ktx2 ${path.resolve(pathIn || pathOut, file)}`,
    )

    const extFile = path.extname(file)
    const newFile = file.replace(extFile, '.ktx2')

    // move image file from root to destination folder
    fs.renameSync(path.resolve(process.cwd(), newFile), path.resolve(pathOut, `${file}.ktx2`))

    next()
  },
  undefined,
  { exts: ['png', 'jpg'], name: 'Image Supercompression' },
)

export default imageSuperCompression