import simpleGit from 'simple-git';
import fs from 'fs';
import path from 'path';

// Format git URL with token if present
function getAuthUrl(repoUrl, token) {
  if (!token) return repoUrl;
  try {
    const url = new URL(repoUrl);
    url.username = token;
    return url.toString();
  } catch (e) {
    // If not a valid URL format, try basic string replace
    if (repoUrl.startsWith('https://')) {
      return `https://${token}@${repoUrl.substring(8)}`;
    }
    return repoUrl;
  }
}

// Clone repo
export async function cloneRepo(repoUrl, destDir, branch = 'main', token = '') {
  fs.mkdirSync(destDir, { recursive: true });
  const git = simpleGit(destDir);
  const authUrl = getAuthUrl(repoUrl, token);
  
  try {
    await git.clone(authUrl, '.', ['--branch', branch]);
  } catch (e) {
    // If it fails (e.g. because branch main doesn't exist yet on empty repo)
    try {
      console.log('Cloning failed or repo is empty. Initializing empty local repository...');
      await git.init();
      await git.addRemote('origin', authUrl);
      
      // Configure user details if not set
      try {
        await git.addConfig('user.name', 'MC Hoster Bot', false, 'local');
        await git.addConfig('user.email', 'bot@mchoster.local', false, 'local');
      } catch (configErr) {}

      // Create a dummy file to establish the branch
      fs.writeFileSync(path.join(destDir, '.gitignore'), '# Minecraft Server Data\nservers.json\n');
      await git.add('.');
      await git.commit('Initial commit');
      await git.push('origin', 'main', ['-u']);
    } catch (innerErr) {
      console.error('Failed to initialize empty repository:', innerErr);
      throw e; // throw the original error if fallback also fails
    }
  }
  return true;
}

// Pull repo updates
export async function pullRepo(destDir) {
  const git = simpleGit(destDir);
  const status = await git.status();
  
  // If there are uncommitted changes, stash them first or commit them
  const result = await git.pull();
  return result;
}

// Commit and Push repo updates
export async function pushRepo(destDir, commitMessage = 'Auto-backup from MC Hoster Panel') {
  const git = simpleGit(destDir);
  
  // Configure user details if not set
  try {
    await git.addConfig('user.name', 'MC Hoster Bot', false, 'local');
    await git.addConfig('user.email', 'bot@mchoster.local', false, 'local');
  } catch (e) {
    console.error('Failed to configure git user info locally:', e);
  }
  
  await git.add('.');
  const status = await git.status();
  
  if (status.staged.length > 0 || status.not_added.length > 0 || status.modified.length > 0) {
    await git.commit(commitMessage);
    await git.push();
    return true;
  }
  return false;
}