const downloadFileFromGithub = require('./download-file-from-github');
const fs = require('fs-extra');
const os = require('os');
const path = require('path');
const { spawnSync } = require('child_process');

module.exports = function(filesToSign) {
  if (
    !process.env.ATOM_WIN_CODE_SIGNING_CERT_DOWNLOAD_URL &&
    !process.env.ATOM_WIN_CODE_SIGNING_CERT_PATH
  ) {
    console.log(
      'Skipping code signing because the ATOM_WIN_CODE_SIGNING_CERT_DOWNLOAD_URL environment variable is not defined'
        .gray
    );
    return;
  }

  let certPath = process.env.ATOM_WIN_CODE_SIGNING_CERT_PATH;
  if (!certPath) {
    certPath = path.join(os.tmpdir(), 'win.p12');
    downloadFileFromGithub(
      process.env.ATOM_WIN_CODE_SIGNING_CERT_DOWNLOAD_URL,
      certPath
    );
  }
  try {
    for (const fileToSign of filesToSign) {
      console.log(`Code-signing executable at ${fileToSign}`);
      signFile(fileToSign);
    }
  } finally {
    if (!process.env.ATOM_WIN_CODE_SIGNING_CERT_PATH) {
      fs.removeSync(certPath);
    }
  }

  function signFile(fileToSign) {
    const signCommand = path.resolve(
      __dirname,
      '..',
      'node_modules',
      '@atom',
      'electron-winstaller',
      'vendor',
      'signtool.exe'
    );
    const args = [
      'sign',
      `/f ${certPath}`, // Signing cert file
      `/p ${process.env.ATOM_WIN_CODE_SIGNING_CERT_PASSWORD}`, // Signing cert password
      '/fd sha256', // File digest algorithm
      '/tr http://timestamp.digicert.com', // Time stamp server
      '/td sha256', // Times stamp algorithm
      `"${fileToSign}"`
    ];
    const result = spawnSync(signCommand, args, {
      stdio: 'inherit',
      shell: true
    });
    if (result.status !== 0) {
      // Ensure we do not dump the signing password into the logs if something goes wrong
      throw new Error(
        `Command ${signCommand} ${args
          .map(a =>
            a.replace(process.env.ATOM_WIN_CODE_SIGNING_CERT_PASSWORD, '******')
          )
          .join(' ')} exited with code ${result.status}`
      );
    }
  }
};