const express = require('express');
const fs = require('fs');
const path = require('path');

const router = express.Router();
const PLUGINS_DIR = path.join(__dirname, '..', 'plugins');

// Ensure plugins directory exists
if (!fs.existsSync(PLUGINS_DIR)) {
  fs.mkdirSync(PLUGINS_DIR, { recursive: true });
}

// List all available plugins
router.get('/', (req, res) => {
  try {
    if (!fs.existsSync(PLUGINS_DIR)) {
      return res.json([]);
    }
    const plugins = [];
    const dirs = fs.readdirSync(PLUGINS_DIR);
    for (const dir of dirs) {
      const pluginPath = path.join(PLUGINS_DIR, dir);
      const manifestPath = path.join(pluginPath, 'plugin.json');
      if (fs.existsSync(manifestPath)) {
        try {
          const manifest = JSON.parse(fs.readFileSync(manifestPath, 'utf-8'));
          plugins.push({ id: dir, ...manifest });
        } catch (e) {
          console.warn(`Invalid plugin manifest: ${dir}`);
        }
      }
    }
    res.json(plugins);
  } catch (err) {
    console.error('Plugin list error:', err);
    res.status(500).json({ error: 'Failed to list plugins' });
  }
});

// Serve plugin code as JavaScript module
router.get('/:id/code', (req, res) => {
  try {
    const pluginDir = path.join(PLUGINS_DIR, req.params.id);
    const codePath = path.join(pluginDir, 'plugin.js');
    if (!fs.existsSync(codePath)) {
      return res.status(404).json({ error: 'Plugin code not found' });
    }
    res.setHeader('Content-Type', 'application/javascript');
    res.sendFile(codePath);
  } catch (err) {
    console.error('Plugin code error:', err);
    res.status(500).json({ error: 'Failed to load plugin code' });
  }
});

module.exports = router;