import { Router } from 'express';
import { getMediaFiles, getSetting, getUserFolderAccess } from './db.js';

const router = Router();
const MEDIA_PATH = process.env.MEDIA_PATH || './data/media';

// GET /api/media?users=folder1,folder2&type=video,image
router.get('/api/media', (req, res) => {
  const { users, type } = req.query;

  if (!users) return res.status(400).json({ error: 'users parameter is required' });
  if (!type) return res.status(400).json({ error: 'type parameter is required' });

  const folders = users.split(',').map(u => u.trim()).filter(Boolean);
  const types = type.split(',').map(t => t.trim().toLowerCase()).filter(Boolean);

  if (folders.length === 0) return res.status(400).json({ error: 'at least one user/folder is required' });

  const validTypes = ['video', 'image'];
  const invalid = types.find(t => !validTypes.includes(t));
  if (invalid) return res.status(400).json({ error: `invalid type: ${invalid}. Must be video, image, or both` });

  // Enforce folder access for non-admin users
  if (req.user && req.user.role !== 'admin') {
    const allowed = getUserFolderAccess(req.user.id);
    if (allowed.length > 0) {
      const denied = folders.filter(f => !allowed.includes(f));
      if (denied.length > 0) {
        return res.status(403).json({ error: `access denied to folders: ${denied.join(', ')}` });
      }
    }
  }

  // If both types requested, query all; otherwise query the single type
  const typeFilter = types.length === 2 ? 'all' : types[0];

  const { rows } = getMediaFiles({
    folders,
    type: typeFilter,
    offset: 0,
    limit: 999999999,
  });

  const hlsEnabled = getSetting('hls_enabled') === 'true' || process.env.HLS_ENABLED === 'true';

  const results = rows.map(r => {
    const item = {
      folder: r.folder,
      path: `${MEDIA_PATH}/${r.folder}/${r.filename}`,
      type: r.type,
    };
    if (r.type === 'video' && hlsEnabled) {
      item.hlsUrl = `/api/hls/${encodeURIComponent(r.folder)}/${encodeURIComponent(r.filename)}/master.m3u8`;
    } else if (r.type === 'video') {
      item.mediaUrl = `/api/gallery/media/${encodeURIComponent(r.folder)}/${encodeURIComponent(r.filename)}`;
    }
    if (r.type === 'image') {
      item.mediaUrl = `/api/gallery/media/${encodeURIComponent(r.folder)}/${encodeURIComponent(r.filename)}`;
    }
    return item;
  });

  res.json(results);
});

export default router;