import { logger } from '../npmci.logging';
import * as plugins from '../npmci.plugins';
import * as paths from '../npmci.paths';
import * as npmciConfig from '../npmci.config';
import { bash, bashNoError, nvmAvailable } from '../npmci.bash';

/**
 * handle cli input
 * @param argvArg
 */
export let handleCli = async argvArg => {
  if (argvArg._.length >= 3) {
    const action: string = argvArg._[1];
    switch (action) {
      case 'install':
        await install(argvArg._[2]);
        break;
      default:
        logger.log('error', `>>npmci node ...<< action >>${action}<< not supported`);
        process.exit(1);
    }
  } else {
    logger.log(
      'error',
      `>>npmci node ...<< cli arguments invalid... Please read the documentation.`
    );
    process.exit(1);
  }
};

/**
 * Install a specific version of node
 * @param versionArg
 */
export let install = async versionArg => {
  logger.log('info', `now installing node version ${versionArg}`);
  let version: string;
  if (versionArg === 'stable') {
    version = '12';
  } else if (versionArg === 'lts') {
    version = '10';
  } else if (versionArg === 'legacy') {
    version = '8';
  } else {
    version = versionArg;
  }
  if (await nvmAvailable.promise) {
    await bash(`nvm install ${version} && nvm alias default ${version}`);
    logger.log('success', `Node version ${version} successfully installed!`);
  } else {
    logger.log('warn', 'Nvm not in path so staying at installed node version!');
  }
  await bash('node -v');
  await bash('npm -v');
  await bash(`npm config set cache ${paths.NpmciCacheDir}  --global `);
  // lets look for further config
  await npmciConfig.getConfig().then(async configArg => {
    logger.log('info', 'Now checking for needed global npm tools...');
    for (const npmTool of configArg.npmGlobalTools) {
      logger.log('info', `Checking for global "${npmTool}"`);
      const whichOutput: string = await bashNoError(`which ${npmTool}`);
      const toolAvailable: boolean = !(/not\sfound/.test(whichOutput) || whichOutput === '');
      if (toolAvailable) {
        logger.log('info', `Tool ${npmTool} is available`);
      } else {
        logger.log('info', `globally installing ${npmTool} from npm`);
        await bash(`npm install ${npmTool} -q -g`);
      }
    }
    logger.log('success', 'all global npm tools specified in npmextra.json are now available!');
  });
};