#!/usr/bin/env node

if (!process.env.CI) require('dotenv-safe').load()
require('colors')
const args = require('minimist')(process.argv.slice(2), {
  boolean: [
    'validateRelease',
    'skipVersionCheck',
    'automaticRelease',
    'verboseNugget'
  ],
  default: { 'verboseNugget': false }
})
const fs = require('fs')
const { execSync } = require('child_process')
const nugget = require('nugget')
const got = require('got')
const pkg = require('../package.json')
const pkgVersion = `v${pkg.version}`
const pass = '\u2713'.green
const path = require('path')
const fail = '\u2717'.red
const sumchecker = require('sumchecker')
const temp = require('temp').track()
const { URL } = require('url')

const octokit = require('@octokit/rest')()
octokit.authenticate({
  type: 'token',
  token: process.env.ELECTRON_GITHUB_TOKEN
})

const targetRepo = pkgVersion.indexOf('nightly') > 0 ? 'nightlies' : 'electron'
let failureCount = 0

async function getDraftRelease (version, skipValidation) {
  const releaseInfo = await octokit.repos.listReleases({
    owner: 'electron',
    repo: targetRepo
  })

  const versionToCheck = version || pkgVersion
  const drafts = releaseInfo.data.filter(release => {
    return release.tag_name === versionToCheck && release.draft === true
  })

  const draft = drafts[0]
  if (!skipValidation) {
    failureCount = 0
    check(drafts.length === 1, 'one draft exists', true)
    if (versionToCheck.indexOf('beta') > -1) {
      check(draft.prerelease, 'draft is a prerelease')
    }
    check(draft.body.length > 50 && !draft.body.includes('(placeholder)'), 'draft has release notes')
    check((failureCount === 0), `Draft release looks good to go.`, true)
  }
  return draft
}

async function validateReleaseAssets (release, validatingRelease) {
  const requiredAssets = assetsForVersion(release.tag_name, validatingRelease).sort()
  const extantAssets = release.assets.map(asset => asset.name).sort()
  const downloadUrls = release.assets.map(asset => asset.browser_download_url).sort()

  failureCount = 0
  requiredAssets.forEach(asset => {
    check(extantAssets.includes(asset), asset)
  })
  check((failureCount === 0), `All required GitHub assets exist for release`, true)

  if (!validatingRelease || !release.draft) {
    if (release.draft) {
      await verifyAssets(release)
    } else {
      await verifyShasums(downloadUrls)
        .catch(err => {
          console.log(`${fail} error verifyingShasums`, err)
        })
    }
    const s3Urls = s3UrlsForVersion(release.tag_name)
    await verifyShasums(s3Urls, true)
  }
}

function check (condition, statement, exitIfFail = false) {
  if (condition) {
    console.log(`${pass} ${statement}`)
  } else {
    failureCount++
    console.log(`${fail} ${statement}`)
    if (exitIfFail) process.exit(1)
  }
}

function assetsForVersion (version, validatingRelease) {
  const patterns = [
    `electron-${version}-darwin-x64-dsym.zip`,
    `electron-${version}-darwin-x64-symbols.zip`,
    `electron-${version}-darwin-x64.zip`,
    `electron-${version}-linux-arm64-symbols.zip`,
    `electron-${version}-linux-arm64.zip`,
    `electron-${version}-linux-armv7l-symbols.zip`,
    `electron-${version}-linux-armv7l.zip`,
    `electron-${version}-linux-ia32-symbols.zip`,
    `electron-${version}-linux-ia32.zip`,
    `electron-${version}-linux-x64-symbols.zip`,
    `electron-${version}-linux-x64.zip`,
    `electron-${version}-mas-x64-dsym.zip`,
    `electron-${version}-mas-x64-symbols.zip`,
    `electron-${version}-mas-x64.zip`,
    `electron-${version}-win32-ia32-pdb.zip`,
    `electron-${version}-win32-ia32-symbols.zip`,
    `electron-${version}-win32-ia32.zip`,
    `electron-${version}-win32-x64-pdb.zip`,
    `electron-${version}-win32-x64-symbols.zip`,
    `electron-${version}-win32-x64.zip`,
    `electron-api.json`,
    `electron.d.ts`,
    `ffmpeg-${version}-darwin-x64.zip`,
    `ffmpeg-${version}-linux-arm64.zip`,
    `ffmpeg-${version}-linux-armv7l.zip`,
    `ffmpeg-${version}-linux-ia32.zip`,
    `ffmpeg-${version}-linux-x64.zip`,
    `ffmpeg-${version}-mas-x64.zip`,
    `ffmpeg-${version}-win32-ia32.zip`,
    `ffmpeg-${version}-win32-x64.zip`
  ]
  if (!validatingRelease) {
    patterns.push('SHASUMS256.txt')
  }
  return patterns
}

function s3UrlsForVersion (version) {
  const bucket = `https://gh-contractor-zcbenz.s3.amazonaws.com/`
  const patterns = [
    `${bucket}atom-shell/dist/${version}/iojs-${version}-headers.tar.gz`,
    `${bucket}atom-shell/dist/${version}/iojs-${version}.tar.gz`,
    `${bucket}atom-shell/dist/${version}/node-${version}.tar.gz`,
    `${bucket}atom-shell/dist/${version}/node.lib`,
    `${bucket}atom-shell/dist/${version}/win-x64/iojs.lib`,
    `${bucket}atom-shell/dist/${version}/win-x86/iojs.lib`,
    `${bucket}atom-shell/dist/${version}/x64/node.lib`,
    `${bucket}atom-shell/dist/${version}/SHASUMS.txt`,
    `${bucket}atom-shell/dist/${version}/SHASUMS256.txt`,
    `${bucket}atom-shell/dist/index.json`
  ]
  return patterns
}

function checkVersion () {
  if (args.skipVersionCheck) return

  console.log(`Verifying that app version matches package version ${pkgVersion}.`)
  const startScript = path.join(__dirname, 'start.py')
  const scriptArgs = ['--version']
  if (args.automaticRelease) {
    scriptArgs.unshift('-R')
  }
  const appVersion = runScript(startScript, scriptArgs).trim()
  check((pkgVersion.indexOf(appVersion) === 0), `App version ${appVersion} matches ` +
    `package version ${pkgVersion}.`, true)
}

function runScript (scriptName, scriptArgs, cwd) {
  const scriptCommand = `${scriptName} ${scriptArgs.join(' ')}`
  const scriptOptions = {
    encoding: 'UTF-8'
  }
  if (cwd) scriptOptions.cwd = cwd
  try {
    return execSync(scriptCommand, scriptOptions)
  } catch (err) {
    console.log(`${fail} Error running ${scriptName}`, err)
    process.exit(1)
  }
}

function uploadNodeShasums () {
  console.log('Uploading Node SHASUMS file to S3.')
  const scriptPath = path.join(__dirname, 'upload-node-checksums.py')
  runScript(scriptPath, ['-v', pkgVersion])
  console.log(`${pass} Done uploading Node SHASUMS file to S3.`)
}

function uploadIndexJson () {
  console.log('Uploading index.json to S3.')
  const scriptPath = path.join(__dirname, 'upload-index-json.py')
  runScript(scriptPath, [pkgVersion])
  console.log(`${pass} Done uploading index.json to S3.`)
}

async function createReleaseShasums (release) {
  const fileName = 'SHASUMS256.txt'
  const existingAssets = release.assets.filter(asset => asset.name === fileName)
  if (existingAssets.length > 0) {
    console.log(`${fileName} already exists on GitHub; deleting before creating new file.`)
    await octokit.repos.deleteReleaseAsset({
      owner: 'electron',
      repo: targetRepo,
      asset_id: existingAssets[0].id
    }).catch(err => {
      console.log(`${fail} Error deleting ${fileName} on GitHub:`, err)
    })
  }
  console.log(`Creating and uploading the release ${fileName}.`)
  const scriptPath = path.join(__dirname, 'merge-electron-checksums.py')
  const checksums = runScript(scriptPath, ['-v', pkgVersion])

  console.log(`${pass} Generated release SHASUMS.`)
  const filePath = await saveShaSumFile(checksums, fileName)

  console.log(`${pass} Created ${fileName} file.`)
  await uploadShasumFile(filePath, fileName, release.id)

  console.log(`${pass} Successfully uploaded ${fileName} to GitHub.`)
}

async function uploadShasumFile (filePath, fileName, releaseId) {
  const uploadUrl = `https://uploads.github.com/repos/electron/${targetRepo}/releases/${releaseId}/assets{?name,label}`
  return octokit.repos.uploadReleaseAsset({
    url: uploadUrl,
    headers: {
      'content-type': 'text/plain',
      'content-length': fs.statSync(filePath).size
    },
    file: fs.createReadStream(filePath),
    name: fileName
  }).catch(err => {
    console.log(`${fail} Error uploading ${filePath} to GitHub:`, err)
    process.exit(1)
  })
}

function saveShaSumFile (checksums, fileName) {
  return new Promise((resolve, reject) => {
    temp.open(fileName, (err, info) => {
      if (err) {
        console.log(`${fail} Could not create ${fileName} file`)
        process.exit(1)
      } else {
        fs.writeFileSync(info.fd, checksums)
        fs.close(info.fd, (err) => {
          if (err) {
            console.log(`${fail} Could close ${fileName} file`)
            process.exit(1)
          }
          resolve(info.path)
        })
      }
    })
  })
}

async function publishRelease (release) {
  return octokit.repos.updateRelease({
    owner: 'electron',
    repo: targetRepo,
    release_id: release.id,
    tag_name: release.tag_name,
    draft: false
  }).catch(err => {
    console.log(`${fail} Error publishing release:`, err)
    process.exit(1)
  })
}

async function makeRelease (releaseToValidate) {
  if (releaseToValidate) {
    if (releaseToValidate === true) {
      releaseToValidate = pkgVersion
    } else {
      console.log('Release to validate !=== true')
    }
    console.log(`Validating release ${releaseToValidate}`)
    const release = await getDraftRelease(releaseToValidate)
    await validateReleaseAssets(release, true)
  } else {
    checkVersion()
    let draftRelease = await getDraftRelease()
    uploadNodeShasums()
    uploadIndexJson()

    await createReleaseShasums(draftRelease)

    // Fetch latest version of release before verifying
    draftRelease = await getDraftRelease(pkgVersion, true)
    await validateReleaseAssets(draftRelease)
    await publishRelease(draftRelease)
    console.log(`${pass} SUCCESS!!! Release has been published. Please run ` +
      `"npm run publish-to-npm" to publish release to npm.`)
  }
}

async function makeTempDir () {
  return new Promise((resolve, reject) => {
    temp.mkdir('electron-publish', (err, dirPath) => {
      if (err) {
        reject(err)
      } else {
        resolve(dirPath)
      }
    })
  })
}

async function verifyAssets (release) {
  const downloadDir = await makeTempDir()

  console.log(`Downloading files from GitHub to verify shasums`)
  const shaSumFile = 'SHASUMS256.txt'

  let filesToCheck = await Promise.all(release.assets.map(async asset => {
    const requestOptions = await octokit.repos.getReleaseAsset.endpoint({
      owner: 'electron',
      repo: targetRepo,
      asset_id: asset.id,
      headers: {
        Accept: 'application/octet-stream'
      }
    })

    const { url, headers } = requestOptions
    headers.authorization = `token ${process.env.ELECTRON_GITHUB_TOKEN}`

    const response = await got(url, {
      followRedirect: false,
      method: 'HEAD',
      headers
    })

    await downloadFiles(response.headers.location, downloadDir, asset.name)
    return asset.name
  })).catch(err => {
    console.log(`${fail} Error downloading files from GitHub`, err)
    process.exit(1)
  })

  filesToCheck = filesToCheck.filter(fileName => fileName !== shaSumFile)
  let checkerOpts
  await validateChecksums({
    algorithm: 'sha256',
    filesToCheck,
    fileDirectory: downloadDir,
    shaSumFile,
    checkerOpts,
    fileSource: 'GitHub'
  })
}

function downloadFiles (urls, directory, targetName) {
  return new Promise((resolve, reject) => {
    const nuggetOpts = { dir: directory }
    nuggetOpts.quiet = !args.verboseNugget
    if (targetName) nuggetOpts.target = targetName

    nugget(urls, nuggetOpts, (err) => {
      if (err) {
        reject(err)
      } else {
        console.log(`${pass} all files downloaded successfully!`)
        resolve()
      }
    })
  })
}

async function verifyShasums (urls, isS3) {
  const fileSource = isS3 ? 'S3' : 'GitHub'
  console.log(`Downloading files from ${fileSource} to verify shasums`)
  const downloadDir = await makeTempDir()
  let filesToCheck = []
  try {
    if (!isS3) {
      await downloadFiles(urls, downloadDir)
      filesToCheck = urls.map(url => {
        const currentUrl = new URL(url)
        return path.basename(currentUrl.pathname)
      }).filter(file => file.indexOf('SHASUMS') === -1)
    } else {
      const s3VersionPath = `/atom-shell/dist/${pkgVersion}/`
      await Promise.all(urls.map(async (url) => {
        const currentUrl = new URL(url)
        const dirname = path.dirname(currentUrl.pathname)
        const filename = path.basename(currentUrl.pathname)
        const s3VersionPathIdx = dirname.indexOf(s3VersionPath)
        if (s3VersionPathIdx === -1 || dirname === s3VersionPath) {
          if (s3VersionPathIdx !== -1 && filename.indexof('SHASUMS') === -1) {
            filesToCheck.push(filename)
          }
          await downloadFiles(url, downloadDir)
        } else {
          const subDirectory = dirname.substr(s3VersionPathIdx + s3VersionPath.length)
          const fileDirectory = path.join(downloadDir, subDirectory)
          try {
            fs.statSync(fileDirectory)
          } catch (err) {
            fs.mkdirSync(fileDirectory)
          }
          filesToCheck.push(path.join(subDirectory, filename))
          await downloadFiles(url, fileDirectory)
        }
      }))
    }
  } catch (err) {
    console.log(`${fail} Error downloading files from ${fileSource}`, err)
    process.exit(1)
  }
  console.log(`${pass} Successfully downloaded the files from ${fileSource}.`)
  let checkerOpts
  if (isS3) {
    checkerOpts = { defaultTextEncoding: 'binary' }
  }

  await validateChecksums({
    algorithm: 'sha256',
    filesToCheck,
    fileDirectory: downloadDir,
    shaSumFile: 'SHASUMS256.txt',
    checkerOpts,
    fileSource
  })

  if (isS3) {
    await validateChecksums({
      algorithm: 'sha1',
      filesToCheck,
      fileDirectory: downloadDir,
      shaSumFile: 'SHASUMS.txt',
      checkerOpts,
      fileSource
    })
  }
}

async function validateChecksums (validationArgs) {
  console.log(`Validating checksums for files from ${validationArgs.fileSource} ` +
    `against ${validationArgs.shaSumFile}.`)
  const shaSumFilePath = path.join(validationArgs.fileDirectory, validationArgs.shaSumFile)
  const checker = new sumchecker.ChecksumValidator(validationArgs.algorithm,
    shaSumFilePath, validationArgs.checkerOpts)
  await checker.validate(validationArgs.fileDirectory, validationArgs.filesToCheck)
    .catch(err => {
      if (err instanceof sumchecker.ChecksumMismatchError) {
        console.error(`${fail} The checksum of ${err.filename} from ` +
          `${validationArgs.fileSource} did not match the shasum in ` +
          `${validationArgs.shaSumFile}`)
      } else if (err instanceof sumchecker.ChecksumParseError) {
        console.error(`${fail} The checksum file ${validationArgs.shaSumFile} ` +
          `from ${validationArgs.fileSource} could not be parsed.`, err)
      } else if (err instanceof sumchecker.NoChecksumFoundError) {
        console.error(`${fail} The file ${err.filename} from ` +
          `${validationArgs.fileSource} was not in the shasum file ` +
          `${validationArgs.shaSumFile}.`)
      } else {
        console.error(`${fail} Error matching files from ` +
          `${validationArgs.fileSource} shasums in ${validationArgs.shaSumFile}.`, err)
      }
      process.exit(1)
    })
  console.log(`${pass} All files from ${validationArgs.fileSource} match ` +
    `shasums defined in ${validationArgs.shaSumFile}.`)
}

makeRelease(args.validateRelease)