import test from 'ava'
import { promises as fs } from 'fs'
import path from 'path'
import {
  deleteDir,
  ensureDirectoryExists,
  extractZip,
  FileDoesNotExist,
  moveDirContents,
  readJSONFile,
  writeJSONFile,
} from '../app/javascripts/Main/Utils/FileUtils'

const dataPath = path.join(__dirname, 'data')
const tmpPath = path.join(dataPath, 'tmp', path.basename(__filename))
const zipFileDestination = path.join(tmpPath, 'zip-file-output')
const root = path.join(tmpPath, 'tmp1')

test.beforeEach(async () => {
  await ensureDirectoryExists(root)
})

test.afterEach(async () => {
  await deleteDir(tmpPath)
})

test('extracts a zip and unnests the folders by one level', async (t) => {
  await extractZip(path.join(dataPath, 'zip-file.zip'), zipFileDestination)
  t.deepEqual(await fs.readdir(zipFileDestination), ['package.json', 'test-file.txt'])
})

test('creates a directory even when parent directories are non-existent', async (t) => {
  await ensureDirectoryExists(path.join(root, 'tmp2', 'tmp3'))
  t.deepEqual(await fs.readdir(root), ['tmp2'])
  t.deepEqual(await fs.readdir(path.join(root, 'tmp2')), ['tmp3'])
})

test('deletes a deeply-nesting directory', async (t) => {
  await ensureDirectoryExists(path.join(root, 'tmp2', 'tmp3'))
  await deleteDir(root)
  try {
    await fs.readdir(path.join(tmpPath, 'tmp1'))
    t.fail('Should not have been able to read')
  } catch (error: any) {
    if (error.code === FileDoesNotExist) {
      t.pass()
    } else {
      t.fail(error)
    }
  }
})

test('moves the contents of one directory to the other', async (t) => {
  const fileNames = ['1.txt', '2.txt', '3.txt', 'nested/4.txt', 'nested/5.txt', 'nested/6.txt']

  /** Create a temp directory and fill it with files */
  const dir = path.join(tmpPath, 'move_contents_src')
  await ensureDirectoryExists(dir)
  await ensureDirectoryExists(path.join(dir, 'nested'))
  await Promise.all(fileNames.map((fileName) => fs.writeFile(path.join(dir, fileName), fileName)))

  /** Now move its contents */
  const dest = path.join(tmpPath, 'move_contents_dest')
  await moveDirContents(dir, dest)
  await Promise.all(
    fileNames.map(async (fileName) => {
      const contents = await fs.readFile(path.join(dest, fileName), 'utf8')
      t.is(contents, fileName)
    }),
  )
})

test('moves the contents of one directory to a child directory', async (t) => {
  const srcFileNames = ['1.txt', '2.txt', '3.txt', 'nested/4.txt', 'nested/5.txt', 'nested/6.txt']
  const destFileNames = ['1.txt', '2.txt', '3.txt', '4.txt', '5.txt', '6.txt']

  /** Create a temp directory and fill it with files */
  const dir = path.join(tmpPath, 'move_contents_src')
  await ensureDirectoryExists(dir)
  await ensureDirectoryExists(path.join(dir, 'nested'))
  await Promise.all(srcFileNames.map((fileName) => fs.writeFile(path.join(dir, fileName), fileName)))

  /** Now move its contents */
  const dest = path.join(dir, 'nested')
  await moveDirContents(dir, dest)

  /** Ensure everything is there */
  t.deepEqual((await fs.readdir(dest)).sort(), destFileNames.sort())
  await Promise.all(
    destFileNames.map(async (fileName, index) => {
      const contents = await fs.readFile(path.join(dest, fileName), 'utf8')
      t.is(contents, srcFileNames[index])
    }),
  )
})

test('serializes and deserializes an object to the same values', async (t) => {
  const data = {
    meter: {
      4: 4,
    },
    chorus: {
      passengers: 2,
      destination: 'moon',
      activities: [{ type: 'play', environment: 'stars' }],
    },
  }
  const filePath = path.join(tmpPath, 'data.json')
  await writeJSONFile(filePath, data)
  t.deepEqual(data, await readJSONFile(filePath))
})