import { exec, execSync } from 'child_process';
import { promises as fs } from 'fs';
import chalk from 'chalk';
import ora from 'ora';

const commitTypes: Record<string, string> = {
  feat: '✨',
  fix: '🐛',
  docs: '📚',
  style: '🎨',
  refactor: '🔨',
  test: '✅',
  chore: '🛠️',
  perf: '⚡',
  ci: '🔧',
  build: '📦',
  revert: '⏪',
};

const defaultEmoji = '🔖';

async function run(): Promise<void> {
  const spinner = ora('Running custom commit message check...').start();

  try {
    console.log(chalk.blue('Running custom commit message check...'));
    console.log();

    const commitMsgFile = process.argv[2];

    if (!commitMsgFile) {
      spinner.fail('Error: Commit message file path not provided.');
      console.error(chalk.red('Error: Commit message file path not provided.'));
      process.exit(1);
    }

    const commitMsg = (await fs.readFile(commitMsgFile, 'utf8')).trim();

    // Check for duplicate commit messages in the last 100 commits
    const duplicateCommitMsg = execSync(`git log -n 100 --pretty=format:%s`)
      .toString()
      .split('\n');

    // Extract emojis from commitTypes
    const emojis = Object.values(commitTypes);

    // Function to remove an emoji from the start of the string
    const removeEmoji = (message: string): string => {
      for (const emoji of emojis) {
        if (message.startsWith(emoji)) {
          return message.slice(emoji.length).trim();
        }
      }
      if (message.startsWith(defaultEmoji)) {
        return message.slice(defaultEmoji.length).trim();
      }
      return message;
    };

    const cleanMessages = duplicateCommitMsg.map(removeEmoji);

    if (cleanMessages.includes(commitMsg)) {
      spinner.fail(chalk.bold.red('Duplicate Commit Detected'));
      console.log();
      console.error(
        chalk.white.bgRed.bold(' ERROR: ') +
          chalk.redBright(' A duplicate commit message has been detected.')
      );
      console.log();
      console.log(
        chalk.yellowBright('TIP: ') +
          chalk.white(' Please use a unique commit message to keep the history clean.')
      );
      console.log();
      process.exit(1);
    }

    spinner.succeed('Message is not duplicated');
    console.log(chalk.green('Message is not duplicated'));
    console.log();
  } catch (err) {
    spinner.fail('Error running custom commit message check.');
    console.error(chalk.red('Error:', err));
    process.exit(1);
  }

  const spinner2 = ora('Running commitlint...').start();

  try {
    console.log(chalk.blue('Running commitlint...'));
    console.log();

    const commitMsgFile = process.argv[2];

    if (!commitMsgFile) {
      spinner2.fail('Error: Commit message file path not provided.');
      console.error(chalk.red('Error: Commit message file path not provided.'));
      process.exit(1);
    }

    const commitMsg = (await fs.readFile(commitMsgFile, 'utf8')).trim();

    // Run commitlint
    exec(
      `npx commitlint --edit ${commitMsgFile}`,
      async (error, stdout, stderr) => {
        if (error) {
          spinner2.fail('Commitlint check failed.');
          console.error(chalk.red(stdout || stderr));
          console.error(chalk.red('Commitlint check failed.'));
          console.log();
          console.error(
            chalk.yellow('Hint: Commit message should follow the Conventional Commits standard.')
          );
          console.error(chalk.yellow('See: https://www.conventionalcommits.org/en/v1.0.0/'));
          console.error(chalk.yellow('Examples:'));
          console.error(chalk.yellow('  feat: add a new feature'));
          console.error(chalk.yellow('  fix: fix a bug'));
          console.error(chalk.yellow('  docs: update documentation'));
          process.exit(1);
        } else {
          spinner2.succeed('Commitlint check passed.');
          console.log(chalk.green('Commitlint check passed.'));
          console.log(chalk.green(stdout));

          // Add emoji to the commit message
          const commitRegex = /^(feat|fix|docs|style|refactor|test|chore|perf|ci|build|revert)(\(.+\))?:\s.+/;
          const match = commitMsg.match(commitRegex);

          if (match) {
            const commitType = match[1];
            const emoji = commitTypes[commitType] || defaultEmoji;
            const newCommitMsg = `${emoji} ${commitMsg}`;
            await fs.writeFile(commitMsgFile, newCommitMsg + '\n', 'utf8');
            console.log(chalk.green('Commit message updated with emoji:'), newCommitMsg);
          } else {
            const newCommitMsg = `${defaultEmoji} ${commitMsg}`;
            await fs.writeFile(commitMsgFile, newCommitMsg + '\n', 'utf8');
            console.log(
              chalk.yellow('Commit message did not match expected format, added default emoji:'),
              newCommitMsg
            );
          }

          process.exit(0);
        }
      }
    );
  } catch (err) {
    spinner2.fail('Error running commitlint.');
    console.error(chalk.red('Error:', err));
    process.exit(1);
  }
}

run();