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 { config } from './config'
import './types' // side-effect: augments fastify types

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'

export async function buildApp() {
  const fastify = Fastify({
    logger: {
      level: config.nodeEnv === 'production' ? 'warn' : 'info',
      ...(config.nodeEnv !== 'production' && {
        transport: { target: 'pino-pretty', options: { colorize: true } },
      }),
    },
  })

  // ── Security ───────────────────────────────────────────────────────────────
  await fastify.register(helmet, { contentSecurityPolicy: false })

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

  return fastify
}