/**
 * Express API Server
 * @author Descomplicar® | @link descomplicar.pt | @copyright 2026
 */
import 'dotenv/config'
import express from 'express'
import cors from 'cors'
import path from 'path'
import { fileURLToPath } from 'url'
import dashboardRouter from './routes/dashboard.js'
import monitorRouter from './routes/monitor.js'
import diagnosticRouter from './routes/diagnostic.js'
import hetznerRouter from './routes/hetzner.js'
import wpMonitorRouter from './routes/wp-monitor.js'
import serverMetricsRouter from './routes/server-metrics.js'
import financialRouter from './routes/financial.js'
import { collectAllServerMetrics } from './services/server-metrics.js'

const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)

const app = express()
const PORT = process.env.API_PORT || 3001
const isProduction = process.env.NODE_ENV === 'production'

// Middleware
app.use(cors({
  origin: process.env.FRONTEND_URL || 'http://localhost:5173',
  credentials: true
}))
app.use(express.json())

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

// Routes
app.use('/api/dashboard', dashboardRouter)
app.use('/api/monitor', monitorRouter)
app.use('/api/diagnostic', diagnosticRouter)
app.use('/api/hetzner', hetznerRouter)
app.use('/api/wp-monitor', wpMonitorRouter)
app.use('/api/server-metrics', serverMetricsRouter)
app.use('/api/financial', financialRouter)

// Serve static files in production
if (isProduction) {
  // __dirname is /app/api/dist, need to go up 2 levels to /app/dist
  const distPath = path.join(__dirname, '..', '..', 'dist')
  app.use(express.static(distPath))

  // SPA fallback - serve index.html for all non-API routes
  app.get('*', (req, res, next) => {
    if (req.path.startsWith('/api')) {
      return next()
    }
    res.sendFile(path.join(distPath, 'index.html'))
  })
}

// Error handling
app.use((err: any, _req: express.Request, res: express.Response, _next: express.NextFunction) => {
  console.error('Server error:', err)
  res.status(500).json({ error: 'Internal server error' })
})

// Start server
app.listen(PORT, () => {
  console.log('='.repeat(50))
  console.log(`API Server running on http://localhost:${PORT}`)
  console.log(`Dashboard: http://localhost:${PORT}/api/dashboard`)
  console.log(`Monitor: http://localhost:${PORT}/api/monitor`)
  console.log(`Hetzner: http://localhost:${PORT}/api/hetzner`)
  console.log('='.repeat(50))

  // Auto-collect server metrics every 5 minutes
  if (isProduction) {
    const INTERVAL = 5 * 60 * 1000
    console.log('[SCHEDULER] Server metrics collection every 5min')

    // Initial collection after 30s (let server stabilize)
    setTimeout(() => {
      collectAllServerMetrics().catch(err =>
        console.error('[SCHEDULER] Initial collection failed:', err)
      )
    }, 30000)

    // Recurring collection
    setInterval(() => {
      collectAllServerMetrics().catch(err =>
        console.error('[SCHEDULER] Collection failed:', err)
      )
    }, INTERVAL)
  }
})