const express = require('express');
const fs = require('fs');
const cors = require('cors');
const path = require('path');
const { initDatabase } = require('./lib/db');

const db = initDatabase();
console.log('Database initialized successfully');

const app = express();
const PORT = process.env.PORT || 3000;

app.use(cors({
  origin: ['http://localhost:5173', 'http://localhost:3000', 'chrome-extension://*', 'https://ark.xiaohongshu.com', 'https://www.xiaohongshu.com'],
  credentials: true,
}));
app.use((req, res, next) => { const start = Date.now(); res.on("finish", () => { const ms = Date.now() - start; if (req.path.startsWith("/api/")) console.log(new Date().toISOString() + " " + req.method + " " + req.path + " " + res.statusCode + " " + ms + "ms"); }); next(); });
app.use(express.json({ limit: '50mb' }));
app.use(express.urlencoded({ extended: true, limit: '50mb' }));

// Read configured image save path from database
let imagesRoot = path.join(__dirname, 'images');
try {
  const savePathRow = db.prepare("SELECT value FROM configs WHERE key = 'image_save_path'").get();
  if (savePathRow && savePathRow.value && savePathRow.value.trim()) {
    imagesRoot = savePathRow.value.trim();
  }
} catch (e) { /* config table may not exist yet */ }
console.log('Image save path:', imagesRoot);

if (!fs.existsSync(imagesRoot)) fs.mkdirSync(imagesRoot, { recursive: true });
app.use('/images', express.static(imagesRoot));
app.use('/api/images', express.static(imagesRoot));

const webDist = path.join(__dirname, '..', 'web', 'dist');
app.use(express.static(webDist));

const createShopRoutes = require('./routes/shops');
const createProductRoutes = require('./routes/products');
const createNoteRoutes = require('./routes/notes');
const createConfigRoutes = require('./routes/configs');
const createTaskRoutes = require('./routes/tasks');
const createGenerateRoutes = require('./routes/generate');
const createLicenseRoutes = require('./routes/license');
const { requireLicense } = require('./lib/licenseAuth');

app.use('/api/license', createLicenseRoutes());
app.use('/api', requireLicense({ allowPaths: ['/health'] }));

app.use('/api/shops', createShopRoutes(db));
app.use('/api/products', createProductRoutes(db));
app.use('/api/notes', createNoteRoutes(db));
app.use('/api/configs', createConfigRoutes(db));
app.use('/api/tasks', createTaskRoutes(db));
app.use('/api/generate', createGenerateRoutes(db));
app.use('/api/notes/generate', createGenerateRoutes(db));

app.get('/api/health', (req, res) => {
  res.json({ status: 'ok', timestamp: new Date().toISOString() });
});

app.get('/api/stats', (req, res) => {
  const shopCount = db.prepare('SELECT COUNT(*) as cnt FROM shops').get().cnt;
  const productCount = db.prepare('SELECT COUNT(*) as cnt FROM products').get().cnt;
  const noteCount = db.prepare('SELECT COUNT(*) as cnt FROM notes').get().cnt;
  const publishedCount = db.prepare("SELECT COUNT(*) as cnt FROM notes WHERE use_status = 'used'").get().cnt;
  const pendingReviewCount = db.prepare("SELECT COUNT(*) as cnt FROM notes WHERE status = 'generated'").get().cnt;
  const failedCount = db.prepare("SELECT COUNT(*) as cnt FROM notes WHERE status = 'failed' OR use_status = 'failed'").get().cnt;
  res.json({ shops: shopCount, products: productCount, notes: noteCount, published: publishedCount, pendingReview: pendingReviewCount, failed: failedCount });
});

// SPA fallback
app.use((req, res, next) => {
  if (req.path.startsWith('/api/')) {
    return res.status(404).json({ error: 'API endpoint not found' });
  }
  res.sendFile(path.join(webDist, 'index.html'), (err) => {
    if (err) res.status(404).json({ error: 'Frontend not built. Run: cd web && npm run build' });
  });
});

//定时释放超时的 publishing 任务（每5分钟检查一次）
setInterval(() => {
  try {
    const stale = db.prepare(
      "UPDATE notes SET status = 'approved', use_status = 'pending', worker_id = NULL, claimed_at = NULL, updated_at = CURRENT_TIMESTAMP WHERE status = 'publishing' AND claimed_at < datetime('now', '-10 minutes')"
    ).run();
    if (stale.changes > 0) {
      console.log(`[定时任务] 释放了 ${stale.changes} 条超时的 publishing 笔记`);
    }
    // 同步清理 publish_tasks 表
    const staleTasks = db.prepare(
      "UPDATE publish_tasks SET status = 'pending', claimed_by = NULL, claimed_at = NULL, updated_at = CURRENT_TIMESTAMP WHERE status IN ('claimed', 'executing') AND claimed_at < datetime('now', '-10 minutes')"
    ).run();
    if (staleTasks.changes > 0) {
      console.log(`[定时任务] 释放了 ${staleTasks.changes} 条超时的 publish_tasks`);
    }
  } catch (e) {
    console.error('[定时任务] 释放超时任务失败:', e.message);
  }
}, 5 * 60 * 1000);

app.listen(PORT, () => {
  console.log(`Server running at http://localhost:${PORT}`);
  console.log(`API: http://localhost:${PORT}/api`);
});