// pages/api/jekyll/create.js
import { exec } from 'child_process';
import { promisify } from 'util';
import path from 'path';
import fs from 'fs-extra';

const execAsync = promisify(exec);

export default async function handler(req, res) {
  if (req.method !== 'POST') {
    return res.status(405).json({ error: 'Method not allowed' });
  }

  try {
    const { siteName, template = 'blog', config = {} } = req.body;

    if (!siteName || !/^[a-zA-Z0-9-_]+$/.test(siteName)) {
      return res.status(400).json({ 
        error: 'Invalid site name. Use only alphanumeric, dash, and underscore.' 
      });
    }

    const sitePath = path.join('/app/projects', siteName);

    // Check if site already exists
    if (await fs.pathExists(sitePath)) {
      return res.status(409).json({ 
        error: 'Site already exists' 
      });
    }

    // Create Jekyll site menggunakan entrypoint script
    console.log(`Creating Jekyll site: ${siteName}`);
    
    const { stdout, stderr } = await execAsync(
      `/usr/local/bin/entrypoint.sh create-site ${siteName}`,
      { 
        timeout: 30000,
        cwd: '/app'
      }
    );

    // Customize site based on template
    await customizeJekyllSite(sitePath, template, config);

    console.log('Jekyll site created:', stdout);
    if (stderr) console.warn('Jekyll warnings:', stderr);

    res.status(201).json({
      success: true,
      message: 'Jekyll site created successfully',
      siteName,
      path: sitePath,
      previewUrl: `/preview/${siteName}`,
      output: stdout
    });

  } catch (error) {
    console.error('Error creating Jekyll site:', error);
    
    res.status(500).json({
      error: 'Failed to create Jekyll site',
      details: error.message,
      stderr: error.stderr || null
    });
  }
}

async function customizeJekyllSite(sitePath, template, config) {
  try {
    // Update _config.yml dengan konfigurasi custom
    const configPath = path.join(sitePath, '_config.yml');
    const defaultConfig = await fs.readFile(configPath, 'utf8');
    
    const customConfig = `${defaultConfig}

# Jekyll Studio Configuration
title: ${config.title || 'My Jekyll Site'}
description: ${config.description || 'Created with Jekyll Studio'}
url: ""
baseurl: ""

# Build settings
markdown: kramdown
highlighter: rouge
theme: minima

plugins:
  - jekyll-feed

# Exclude from processing
exclude:
  - Gemfile
  - Gemfile.lock
  - node_modules
  - vendor/bundle/
  - vendor/cache/
  - vendor/gems/
  - vendor/ruby/
`;

    await fs.writeFile(configPath, customConfig);

    // Create sample post berdasarkan template
    const postsDir = path.join(sitePath, '_posts');
    await fs.ensureDir(postsDir);

    const samplePost = `---
layout: post
title: "Welcome to Jekyll Studio!"
date: ${new Date().toISOString().split('T')[0]} 12:00:00 +0000
categories: jekyll update
---

# Welcome to Your New Jekyll Site!

This site was created using **Jekyll Studio** on Hugging Face Spaces.

## Features

- 🚀 Fast static site generation
- 📝 Markdown support  
- 🎨 Customizable themes
- 📱 Mobile responsive
- 🔍 SEO optimized

## Getting Started

Edit this post in \`_posts/\` directory or create new posts using the Jekyll Studio interface.

Happy blogging! ✨
`;

    const postPath = path.join(postsDir, `${new Date().toISOString().split('T')[0]}-welcome-to-jekyll-studio.md`);
    await fs.writeFile(postPath, samplePost);

    console.log(`Jekyll site customized with ${template} template`);
  } catch (error) {
    console.warn('Failed to customize Jekyll site:', error.message);
  }
}