/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import {readFileSync} from 'fs';
import {resolve} from 'path';

import {getRepoBaseDir} from '../utils/config';
import {error, green, info, red} from '../utils/console';

import {deleteCommitMessageDraft, saveCommitMessageDraft} from './commit-message-draft';
import {printValidationErrors, validateCommitMessage} from './validate';

/** Validate commit message at the provided file path. */
export function validateFile(filePath: string) {
  const commitMessage = readFileSync(resolve(getRepoBaseDir(), filePath), 'utf8');
  const {valid, errors} = validateCommitMessage(commitMessage);
  if (valid) {
    info(`${green('√')}  Valid commit message`);
    deleteCommitMessageDraft(filePath);
    return;
  }

  error(`${red('✘')}  Invalid commit message`);
  printValidationErrors(errors);
  error('Aborting commit attempt due to invalid commit message.');

  // On all invalid commit messages, the commit message should be saved as a draft to be
  // restored on the next commit attempt.
  saveCommitMessageDraft(filePath, commitMessage);
  // If the validation did not return true, exit as a failure.
  process.exit(1);
}