import Fastify, { FastifyRequest, FastifyReply } from 'fastify'
import jwt from '@fastify/jwt'
import cookie from '@fastify/cookie'
import cors from '@fastify/cors'
import helmet from '@fastify/helmet'
import rateLimit from '@fastify/rate-limit'
import multipart from '@fastify/multipart'
import staticFiles from '@fastify/static'
import { join } from 'path'
import { config } from './config'
import './types' // side-effect: augments fastify types

import fastifyWebsocket   from '@fastify/websocket'
import wsRoutes          from './routes/ws'
import authRoutes        from './routes/auth'
import hotelsRoutes      from './routes/hotels'
import roomsRoutes       from './routes/rooms'
import bookingsRoutes    from './routes/bookings'
import housekeepingRoutes from './routes/housekeeping'
import channelsRoutes    from './routes/channels'
import usersRoutes       from './routes/users'
import netupRoutes       from './routes/netup'
import guestsRoutes        from './routes/guests'
import bookingGuestsRoutes from './routes/booking-guests'
import hotelSettingsRoutes from './routes/hotel-settings'
import rentalRoutes        from './routes/rental'
import categoriesRoutes    from './routes/categories'
import tariffsRoutes       from './routes/tariffs'
import ratePeriodsRoutes   from './routes/rate-periods'
import rateOverridesRoutes from './routes/rate-overrides'
import uploadRoutes        from './routes/upload'
import housekeepingSettingsRoutes from './routes/housekeeping-settings'
import notificationsRoutes from './routes/notifications'
import scheduleRoutes      from './routes/schedule'
import loyaltyRoutes       from './routes/loyalty'
import chatRoutes          from './routes/chat'
import workstationRoutes   from './routes/workstations'
import agentReleaseRoutes  from './routes/agent-release'
import wifiSettingsRoutes, { wifiAuthVerify } from './routes/wifi-settings'
import { setupAgentWsRoute } from './agent-ws'
import { startJobs } from './jobs'

export async function buildApp() {
  const fastify = Fastify({
    logger: {
      level: config.nodeEnv === 'production' ? 'warn' : 'info',
      ...(config.nodeEnv !== 'production' && {
        transport: { target: 'pino-pretty', options: { colorize: true } },
      }),
    },
    bodyLimit: 20 * 1024 * 1024, // 20MB — for base64 photo uploads
    trustProxy: true, // get real IP from X-Real-IP / X-Forwarded-For via nginx
  })

  // ── File uploads & static ─────────────────────────────────────────────────
  await fastify.register(multipart)
  const uploadsDir = process.env.UPLOADS_DIR ?? join(process.cwd(), 'uploads')
  await fastify.register(staticFiles, { root: uploadsDir, prefix: '/uploads/' })
  const agentUpdatesDir = process.env.AGENT_UPDATES_DIR ?? join(process.cwd(), '..', 'agent-updates')
  await fastify.register(staticFiles, { root: agentUpdatesDir, prefix: '/agent-updates/', decorateReply: false })

  // ── WebSocket ──────────────────────────────────────────────────────────────
  await fastify.register(fastifyWebsocket)

  // ── Security ───────────────────────────────────────────────────────────────
  await fastify.register(helmet, { contentSecurityPolicy: false, crossOriginResourcePolicy: { policy: 'cross-origin' } })

  await fastify.register(cors, {
    origin: config.cors.origins,
    credentials: true,
    methods: ['GET', 'POST', 'PATCH', 'PUT', 'DELETE', 'OPTIONS'],
  })

  await fastify.register(rateLimit, {
    max: 200,
    timeWindow: '1 minute',
  })

  // ── Cookies & JWT ──────────────────────────────────────────────────────────
  await fastify.register(cookie)

  await fastify.register(jwt, {
    secret: config.jwt.secret,
  })

  // Authenticate decorator used as onRequest hook in routes
  fastify.decorate(
    'authenticate',
    async (request: FastifyRequest, reply: FastifyReply) => {
      try {
        await request.jwtVerify()
      } catch (err) {
        reply.code(401).send({ error: 'Unauthorized' })
      }
    },
  )

  // ── Health check ───────────────────────────────────────────────────────────
  fastify.get('/health', async () => ({ status: 'ok', ts: new Date().toISOString() }))

  // ── Routes ─────────────────────────────────────────────────────────────────
  await fastify.register(wsRoutes)
  await fastify.register(authRoutes)
  await fastify.register(hotelsRoutes)
  await fastify.register(roomsRoutes)
  await fastify.register(bookingsRoutes)
  await fastify.register(housekeepingRoutes)
  await fastify.register(channelsRoutes)
  await fastify.register(usersRoutes)
  await fastify.register(netupRoutes)
  await fastify.register(guestsRoutes)
  await fastify.register(bookingGuestsRoutes)
  await fastify.register(hotelSettingsRoutes)
  await fastify.register(rentalRoutes)
  await fastify.register(categoriesRoutes)
  await fastify.register(tariffsRoutes)
  await fastify.register(ratePeriodsRoutes)
  await fastify.register(rateOverridesRoutes)
  await fastify.register(uploadRoutes)
  await fastify.register(housekeepingSettingsRoutes)
  await fastify.register(notificationsRoutes)
  await fastify.register(scheduleRoutes)
  await fastify.register(loyaltyRoutes)
  await fastify.register(chatRoutes)
  await fastify.register(workstationRoutes)
  await fastify.register(agentReleaseRoutes)
  await fastify.register(wifiSettingsRoutes)
  await fastify.register(wifiAuthVerify)
  await fastify.register(setupAgentWsRoute)

  startJobs()

  return fastify
}