import { execa } from 'execa';
import * as fs from 'fs';
import { resolve } from 'path';
import chalk from 'chalk';

const removeNewline = (string) => {
  return string.replace(/(\r\n|\n|\r)/gm, "");
}

const readConfigFile = (file) => {
  if (fs.existsSync(file)) {
    return fs.readFileSync(file, { encoding: 'utf-8' });
  }

  return '';
}

// These files are optional, so we don't want to error if they don't exist
const display = removeNewline(readConfigFile('docker-display.txt'));
const displayVolume = removeNewline(readConfigFile('docker-display-volume.txt'));

// Using --mount requires an absolute path which is what this gives us.
const pwd = resolve('./');

/**
 * -it will let the user gracefully kill the process using Ctrl+C (or equivalent)
 * -e DISPLAY and -v handle configuration for headed mode
 * --ipc=host is recommended when using Chromium to avoid out of memory crashes: https://playwright.dev/docs/ci#docker
 * --init is recommended to avoid zombie processes: https://playwright.dev/docs/ci#docker
 * --mount allow us to mount the local Ionic project inside of the Docker container so devs do not need to re-build the project in Docker.
 */
const args = ['run', '--rm', '--init', `-e DISPLAY=${display}`, `-v ${displayVolume}`, '--ipc=host', `--mount=type=bind,source=${pwd},target=/ionic`, 'ionic-playwright', 'npm run test.e2e --', ...process.argv.slice(2)];

// Set the CI env variable so Playwright uses the CI config
if (process.env.CI) {
  args.splice(1, 0, '-e CI=true');
/**
 * Otherwise, we should let the session be interactive locally. This will
 * not work on CI which is why we do not apply it there.
 */
} else {
  args.splice(1, 0, '-it');
}

/**
 * While these config files are optional to run the tests, they are required to run
 * the tests in headed mode. Add a warning if dev tries to run headed tests without
 * the correct config files.
 */
const requestHeaded = process.argv.find(arg => arg.includes('headed'));
const hasHeadedConfigFiles = display && displayVolume;
if (requestHeaded && !hasHeadedConfigFiles) {
  console.warn(chalk.yellow.bold('\n⚠️ You are running tests in headed mode, but one or more of your headed config files was not found.\nPlease ensure that both docker-display.txt and docker-display-volume.txt have been created in the correct location.\n'));
}

const res = await execa('docker', args, { shell: true, stdio: 'inherit' });

// If underlying scripts failed this whole process should fail too
process.exit(res.exitCode);