/**
 * NetUP PMS pull-integration endpoint.
 *
 * NetUP polls this URL every N minutes (configured as "TravelLine" integration type in NetUP).
 * We log every request so we can see exactly what NetUP sends, and respond with active bookings.
 *
 * Configure in NetUP:
 *   Integration type: TravelLine
 *   API URL: https://api.hotelsync.ru/netup-pms
 *   Token: <tl_token from netup_settings>
 */

import type { FastifyPluginAsync } from 'fastify'
import { db } from '../db'

// In-memory ring buffer — last 100 captured requests (shared with netup.ts via export)
const MAX_CAPTURE = 100
export const captured: {
  ts: string
  method: string
  url: string
  headers: Record<string, string | string[] | undefined>
  query: Record<string, unknown>
  body: unknown
}[] = []

function recordRequest(request: {
  method: string
  url: string
  headers: Record<string, string | string[] | undefined>
  query: unknown
  body: unknown
}) {
  captured.push({
    ts:      new Date().toISOString(),
    method:  request.method,
    url:     request.url,
    headers: request.headers,
    query:   request.query as Record<string, unknown>,
    body:    request.body,
  })
  if (captured.length > MAX_CAPTURE) captured.shift()
}

const netupPms: FastifyPluginAsync = async (fastify) => {

  // Catch /netup-pms and /netup-pms/* — everything NetUP might call
  for (const pattern of ['/netup-pms', '/netup-pms/*']) {
    fastify.all(pattern, async (request, reply) => {
      recordRequest(request as Parameters<typeof recordRequest>[0])
      fastify.log.info({ method: request.method, url: request.url }, 'NetUP PMS poll')

      const token = extractToken(request)
      if (!token) return reply.code(401).send({ error: 'Unauthorized' })

      const { rows: [row] } = await db.query(
        `SELECT hs.hotel_id FROM netup_settings hs WHERE hs.tl_token = $1`,
        [token],
      ).catch(() => ({ rows: [] as { hotel_id: string }[] }))

      if (!row) return reply.send(buildEmptyResponse())

      return reply.send(await buildResponse(row.hotel_id))
    })
  }
}

// ── Helpers ───────────────────────────────────────────────────────────────────

function extractToken(request: { headers: Record<string, string | string[] | undefined>; query: unknown }): string | null {
  const auth = request.headers['authorization'] as string | undefined
  if (auth?.startsWith('Bearer ')) return auth.slice(7)
  if (auth?.startsWith('Token '))  return auth.slice(6)
  const q = request.query as Record<string, string>
  return q?.token ?? q?.api_key ?? null
}

function buildEmptyResponse() {
  return { success: true, reservations: [], rooms: [] }
}

async function buildResponse(hotelId: string) {
  const { rows: bookings } = await db.query(
    `SELECT b.id, b.guest_name, b.guest_email, b.guest_phone,
            b.check_in, b.check_out, b.status, b.adults, b.children,
            r.number as room_number, r.id as room_id,
            m.netup_room_number
     FROM bookings b
     JOIN rooms r ON r.id = b.room_id
     LEFT JOIN netup_room_mapping m ON m.pms_room_id = r.id AND m.hotel_id = $1
     WHERE b.hotel_id = $1
       AND b.status IN ('confirmed','checked_in')
       AND b.check_out >= CURRENT_DATE
     ORDER BY b.check_in`,
    [hotelId],
  )

  const reservations = bookings.map((b: Record<string, unknown>) => ({
    id:         b.id,
    status:     b.status === 'checked_in' ? 'CheckedIn' : 'Confirmed',
    guestName:  b.guest_name,
    guestEmail: b.guest_email ?? '',
    guestPhone: b.guest_phone ?? '',
    roomNumber: b.netup_room_number ?? b.room_number,
    pmsRoomId:  b.room_id,
    checkIn:    b.check_in,
    checkOut:   b.check_out,
    adults:     b.adults,
    children:   b.children ?? 0,
  }))

  return { success: true, reservations }
}

export default netupPms