import express from 'express';
import path from 'path';
import mime from 'mime-types';
import fs from 'fs';
import {
  scanPlugins,
  getPluginsConfig,
  savePluginsConfig,
  resolvePluginAssetPath,
  installPluginFromGit,
  updatePluginFromGit,
  uninstallPlugin,
} from '../utils/plugin-loader.js';

const router = express.Router();

// GET / — List all installed plugins
router.get('/', (req, res) => {
  try {
    const plugins = scanPlugins();
    res.json({ plugins });
  } catch (err) {
    res.status(500).json({ error: 'Failed to scan plugins', details: err.message });
  }
});

// GET /:name/manifest — Get single plugin manifest
router.get('/:name/manifest', (req, res) => {
  try {
    const plugins = scanPlugins();
    const plugin = plugins.find(p => p.name === req.params.name);
    if (!plugin) {
      return res.status(404).json({ error: 'Plugin not found' });
    }
    res.json(plugin);
  } catch (err) {
    res.status(500).json({ error: 'Failed to read plugin manifest', details: err.message });
  }
});

// GET /:name/assets/* — Serve plugin static files
router.get('/:name/assets/*', (req, res) => {
  const pluginName = req.params.name;
  const assetPath = req.params[0];

  if (!assetPath) {
    return res.status(400).json({ error: 'No asset path specified' });
  }

  const resolvedPath = resolvePluginAssetPath(pluginName, assetPath);
  if (!resolvedPath) {
    return res.status(404).json({ error: 'Asset not found' });
  }

  const contentType = mime.lookup(resolvedPath) || 'application/octet-stream';
  res.setHeader('Content-Type', contentType);
  fs.createReadStream(resolvedPath).pipe(res);
});

// PUT /:name/enable — Toggle plugin enabled/disabled
router.put('/:name/enable', (req, res) => {
  try {
    const { enabled } = req.body;
    if (typeof enabled !== 'boolean') {
      return res.status(400).json({ error: '"enabled" must be a boolean' });
    }

    const plugins = scanPlugins();
    const plugin = plugins.find(p => p.name === req.params.name);
    if (!plugin) {
      return res.status(404).json({ error: 'Plugin not found' });
    }

    const config = getPluginsConfig();
    config[req.params.name] = { ...config[req.params.name], enabled };
    savePluginsConfig(config);

    res.json({ success: true, name: req.params.name, enabled });
  } catch (err) {
    res.status(500).json({ error: 'Failed to update plugin', details: err.message });
  }
});

// POST /install — Install plugin from git URL
router.post('/install', async (req, res) => {
  try {
    const { url } = req.body;
    if (!url || typeof url !== 'string') {
      return res.status(400).json({ error: '"url" is required and must be a string' });
    }

    // Basic URL validation
    if (!url.startsWith('https://') && !url.startsWith('git@')) {
      return res.status(400).json({ error: 'URL must start with https:// or git@' });
    }

    const manifest = await installPluginFromGit(url);
    res.json({ success: true, plugin: manifest });
  } catch (err) {
    res.status(400).json({ error: 'Failed to install plugin', details: err.message });
  }
});

// POST /:name/update — Pull latest from git
router.post('/:name/update', async (req, res) => {
  try {
    const pluginName = req.params.name;

    if (!/^[a-zA-Z0-9_-]+$/.test(pluginName)) {
      return res.status(400).json({ error: 'Invalid plugin name' });
    }

    const manifest = await updatePluginFromGit(pluginName);
    res.json({ success: true, plugin: manifest });
  } catch (err) {
    res.status(400).json({ error: 'Failed to update plugin', details: err.message });
  }
});

// DELETE /:name — Uninstall plugin
router.delete('/:name', (req, res) => {
  try {
    const pluginName = req.params.name;

    // Validate name format to prevent path traversal
    if (!/^[a-zA-Z0-9_-]+$/.test(pluginName)) {
      return res.status(400).json({ error: 'Invalid plugin name' });
    }

    uninstallPlugin(pluginName);
    res.json({ success: true, name: pluginName });
  } catch (err) {
    res.status(400).json({ error: 'Failed to uninstall plugin', details: err.message });
  }
});

export default router;