// Copyright 2019-2021 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

const { readFileSync, readdirSync, writeFileSync, copyFileSync } = require('fs')
const { copySync } = require('fs-extra')

/**
 * append our api modules to `exports` in `package.json` then write it to `./dist`
 */
const pkg = JSON.parse(readFileSync('package.json', 'utf8'))
const modules = readdirSync('src').map((mod) => mod.replace('.ts', ''))
if (!pkg.exports) {
  pkg.exports = {}
}
const outputPkg = Object.assign(
  pkg.exports,
  ...modules.map((mod) => {
    let temp = {}
    let key = `./${mod}`
    if (mod === 'index') {
      key = '.'
    }

    temp[key] = {
      import: `./${mod}.js`,
      require: `./${mod}.cjs`
    }
    return temp
  }),
  // if for some reason in the future we manually add something in the `exports` field
  // this will ensure it doesn't get overwritten by the logic above
  { ...pkg.exports }
)
writeFileSync('dist/package.json', JSON.stringify(outputPkg, undefined, 2))

/**
 * copy necessary files like `CHANGELOG.md` and Licenses to `./dist`
 */
const files = readdirSync('.').filter(
  (f) => f === 'CHANGELOG.md' || f.startsWith('LICENSE')
)
files.forEach((f) => copyFileSync(f, `dist/${f}`))

/**
 * copy typescript src files to `./dist`
 */
copySync('src', 'dist')