import { createServer } from 'http'
import express from 'express'
import { WebSocketServer } from 'ws'
import { fileURLToPath } from 'url'
import { dirname, join } from 'path'
import { setupWebSocketHandler } from './src/websocket-handler.js'
import { printServerInfo } from './src/server-utils.js'
import { getPartite, getPartita } from './src/db.js'

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

// --- Configurazione del server ---

const DISPLAY_PORT = process.env.PORT || 3000
const CONTROLLER_PORT = process.env.CONTROLLER_PORT || 3001

// ========================================
// Server Display (porta principale)
// ========================================

const displayApp = express()

// Espone i file generati dalla build di Vite.
displayApp.use(express.static(join(__dirname, 'dist')))

// API REST per le partite salvate.
displayApp.get('/api/partite', (_req, res) => {
    try { res.json(getPartite()) }
    catch (err) { res.status(500).json({ error: err.message }) }
})

displayApp.get('/api/partite/:id', (req, res) => {
    try {
        const p = getPartita(Number(req.params.id))
        if (!p) return res.status(404).json({ error: 'Not found' })
        res.json(p)
    } catch (err) { res.status(500).json({ error: err.message }) }
})

// Fallback per SPA: restituisce `index.html` per tutte le route.
displayApp.get(/.*/, (_req, res) => {
    res.sendFile(join(__dirname, 'dist', 'index.html'))
})

const displayServer = createServer(displayApp)

// Inizializza il server WebSocket condiviso.
const wss = new WebSocketServer({ noServer: true })
setupWebSocketHandler(wss)

displayServer.on('upgrade', (request, socket, head) => {
    const pathname = new URL(request.url, `http://${request.headers.host}`).pathname
    if (pathname === '/ws') {
        wss.handleUpgrade(request, socket, head, (ws) => {
            wss.emit('connection', ws, request)
        })
    } else {
        socket.destroy()
    }
})

displayServer.listen(DISPLAY_PORT, '0.0.0.0', () => {
    console.log(`[Display] Server running on port ${DISPLAY_PORT}`)
})

// ========================================
// Server Controller (porta separata)
// ========================================

const controllerApp = express()

// Espone gli stessi file statici della build.
// IMPORTANTE: { index: false } impedisce di servire index.html (il display) sulla root.
controllerApp.use(express.static(join(__dirname, 'dist'), { index: false }))

// Fallback: restituisce `controller.html` per tutte le route.
controllerApp.get(/.*/, (_req, res) => {
    res.sendFile(join(__dirname, 'dist', 'controller.html'))
})

const controllerServer = createServer(controllerApp)

// Gestisce l'upgrade WebSocket anche sulla porta del controller.
controllerServer.on('upgrade', (request, socket, head) => {
    const pathname = new URL(request.url, `http://${request.headers.host}`).pathname
    if (pathname === '/ws') {
        wss.handleUpgrade(request, socket, head, (ws) => {
            wss.emit('connection', ws, request)
        })
    } else {
        socket.destroy()
    }
})

controllerServer.listen(CONTROLLER_PORT, '0.0.0.0', () => {
    printServerInfo(DISPLAY_PORT, CONTROLLER_PORT)
})