const express = require('express');
const router = express.Router();
const roomStore = require('../store/roomStore');
const { validateRoom } = require('../middleware/validate');
const { generateStreamUrls } = require('../utils/streamUrl');
const { getActiveStreamKeys } = require('../utils/srsHttpApi');

 const getRequestHost = (req) => {
   const hostHeader = req && req.get ? req.get('host') : null;
   const fromHeader = hostHeader ? String(hostHeader).split(':')[0] : null;
   return req && req.hostname ? req.hostname : fromHeader;
 };

// GET /api/rooms - 获取所有房间
router.get('/', async (req, res) => {
  const rooms = roomStore.getAll();
  const activeStreamKeys = await getActiveStreamKeys({ app: 'live' });
  const requestHost = getRequestHost(req);

  res.json({
    success: true,
    data: rooms.map(room => ({
      ...room,
      isLive: activeStreamKeys.size ? activeStreamKeys.has(room.streamKey) : room.isLive,
      streamUrls: generateStreamUrls(room.streamKey, requestHost)
    }))
  });
});

// POST /api/rooms - 创建房间
router.post('/', validateRoom, (req, res) => {
  const { title, streamerName } = req.body;
  const room = roomStore.create({ title, streamerName });
  const requestHost = getRequestHost(req);
  
  res.status(201).json({
    success: true,
    data: {
      ...room,
      streamUrls: generateStreamUrls(room.streamKey, requestHost)
    }
  });
});

// GET /api/rooms/:id - 获取单个房间
router.get('/:id', async (req, res) => {
  const room = roomStore.getById(req.params.id);
  const requestHost = getRequestHost(req);
  
  if (!room) {
    return res.status(404).json({
      success: false,
      error: { code: 'ROOM_NOT_FOUND', message: '房间不存在' }
    });
  }
  
  res.json({
    success: true,
    data: {
      ...room,
      isLive: (await getActiveStreamKeys({ app: 'live' })).has(room.streamKey) || room.isLive,
      streamUrls: generateStreamUrls(room.streamKey, requestHost)
    }
  });
});

// DELETE /api/rooms/:id - 删除房间
router.delete('/:id', (req, res) => {
  const deleted = roomStore.delete(req.params.id);
  
  if (!deleted) {
    return res.status(404).json({
      success: false,
      error: { code: 'ROOM_NOT_FOUND', message: '房间不存在' }
    });
  }
  
  res.json({ success: true });
});

module.exports = router;