const express = require('express');
const router = express.Router();
const svc = require('../services/userPosts');

const getUserId = (req) => parseInt(req.headers['x-user-id']) || null;

// GET /api/user-posts?channel_id=N&status=draft
router.get('/', async (req, res) => {
  try {
    const userId = getUserId(req);
    if (!userId) return res.status(401).json({ error: 'Unauthorized' });
    const posts = await svc.listUserPosts({
      userId,
      channelId: req.query.channel_id ? parseInt(req.query.channel_id) : null,
      status: req.query.status || null,
      limit: parseInt(req.query.limit) || 50,
    });
    res.json(posts);
  } catch (err) { res.status(500).json({ error: err.message }); }
});

// POST /api/user-posts
router.post('/', async (req, res) => {
  try {
    const userId = getUserId(req);
    if (!userId) return res.status(401).json({ error: 'Unauthorized' });
    const { channel_id, content, image_url, image_credit, topic, status, scheduled_at } = req.body;
    if (!channel_id || !content) return res.status(400).json({ error: 'channel_id and content required' });
    const post = await svc.savePost({
      userId, channelId: channel_id, content,
      imageUrl: image_url,
      imageCredit: image_credit ?? null,
      topic,
      status: status || 'draft',
      scheduledAt: scheduled_at,
    });
    res.json(post);
  } catch (err) { res.status(500).json({ error: err.message }); }
});

// GET /api/user-posts/:id
router.get('/:id', async (req, res) => {
  try {
    const userId = getUserId(req);
    if (!userId) return res.status(401).json({ error: 'Unauthorized' });
    const post = await svc.getPost(userId, req.params.id);
    if (!post) return res.status(404).json({ error: 'Not found' });
    res.json(post);
  } catch (err) { res.status(500).json({ error: err.message }); }
});

// PATCH /api/user-posts/:id
router.patch('/:id', async (req, res) => {
  try {
    const userId = getUserId(req);
    if (!userId) return res.status(401).json({ error: 'Unauthorized' });
    const post = await svc.updatePost(userId, req.params.id, req.body);
    if (!post) return res.status(404).json({ error: 'Not found' });
    res.json(post);
  } catch (err) { res.status(500).json({ error: err.message }); }
});

// DELETE /api/user-posts/:id
router.delete('/:id', async (req, res) => {
  try {
    const userId = getUserId(req);
    if (!userId) return res.status(401).json({ error: 'Unauthorized' });
    await svc.deletePost(userId, req.params.id);
    res.json({ ok: true });
  } catch (err) { res.status(500).json({ error: err.message }); }
});

// POST /api/user-posts/:id/publish — опубликовать прямо сейчас
router.post('/:id/publish', async (req, res) => {
  try {
    const userId = getUserId(req);
    if (!userId) return res.status(401).json({ error: 'Unauthorized' });
    const result = await svc.publishPost(userId, req.params.id);
    res.json(result);
  } catch (err) { res.status(500).json({ error: err.message }); }
});

// POST /api/user-posts/run-scheduled — внутренний endpoint для cron
router.post('/run-scheduled', async (req, res) => {
  try {
    const result = await svc.runScheduledPublications();
    res.json(result);
  } catch (err) { res.status(500).json({ error: err.message }); }
});

module.exports = router;