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

type SlugParam   = { Params: { slug: string } }
type SlugIdParam = { Params: { slug: string; id: string } }

// ── Push event log (check-in / check-out calls to NetUP) ─────────────────────
export type PushEvent = {
  ts:            string
  action:        'check-in' | 'check-out' | 'message'
  hotelId:       string
  roomNumber:    string
  netupRoom:     string
  url:           string
  requestBody?:  unknown
  status:        'ok' | 'error' | 'skipped'
  httpStatus?:   number
  responseBody?: string
  error?:        string
}
// In-memory fallback (used before DB write completes; also keeps last 50)
export const pushLog: PushEvent[] = []

function recordPush(e: PushEvent) {
  pushLog.push(e)
  if (pushLog.length > 50) pushLog.shift()

  // Persist to DB (fire-and-forget); also enforce 50-row limit per hotel
  db.query(
    `INSERT INTO netup_push_log
       (hotel_id, ts, action, room_number, netup_room, url, request_body, status, http_status, response_body, error)
     VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11)`,
    [e.hotelId, e.ts, e.action, e.roomNumber, e.netupRoom, e.url,
     e.requestBody ? JSON.stringify(e.requestBody) : null,
     e.status, e.httpStatus ?? null, e.responseBody ?? null, e.error ?? null],
  ).then(() =>
    // Keep only last 50 rows per hotel
    db.query(
      `DELETE FROM netup_push_log WHERE hotel_id = $1 AND id NOT IN (
         SELECT id FROM netup_push_log WHERE hotel_id = $1 ORDER BY ts DESC LIMIT 50
       )`,
      [e.hotelId],
    )
  ).catch(() => { /* best-effort */ })
}

const netup: FastifyPluginAsync = async (fastify) => {
  const getHotelId = async (slug: string): Promise<string | null> => {
    const { rows } = await db.query('SELECT id FROM hotels WHERE slug = $1', [slug])
    return rows[0]?.id ?? null
  }

  const canAccess = (userSlug: string | null, role: string, slug: string) =>
    role === 'super_admin' || userSlug === slug

  // ── Вспомогательная функция: HTTP запрос к NetUP MW ──────────────────────
  async function netupReq(
    serverUrl: string,
    username: string,
    password: string,
    method: string,
    path: string,
    body?: unknown,
  ): Promise<{ ok: boolean; status: number; data: unknown }> {
    const base = serverUrl.replace(/\/$/, '')
    const url  = `${base}/mw/api${path}`
    const cred = Buffer.from(`${username}:${password}`).toString('base64')

    const res = await fetch(url, {
      method,
      headers: {
        'Authorization': `Basic ${cred}`,
        'Content-Type': 'application/json',
      },
      body: body ? JSON.stringify(body) : undefined,
      signal: AbortSignal.timeout(8000),
    })

    let data: unknown = null
    try { data = await res.json() } catch { /* empty response */ }

    return { ok: res.ok, status: res.status, data }
  }

  // ── GET /api/hotels/:slug/netup/settings ────────────────────────────────
  fastify.get<SlugParam>(
    '/api/hotels/:slug/netup/settings',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      const { slug } = request.params
      if (!canAccess(request.user.hotelSlug, request.user.role, slug)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const hotelId = await getHotelId(slug)
      if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })

      const { rows } = await db.query(
        'SELECT server_url, username, password, default_language, enabled, tl_token FROM netup_settings WHERE hotel_id = $1',
        [hotelId],
      )
      return rows[0] ?? { server_url: '', username: 'admin', password: '', default_language: 'ru_RU', enabled: false, tl_token: '' }
    },
  )

  // ── PATCH /api/hotels/:slug/netup/settings ───────────────────────────────
  fastify.patch<SlugParam & { Body: { server_url?: string; username?: string; password?: string; default_language?: string; enabled?: boolean; tl_token?: string } }>(
    '/api/hotels/:slug/netup/settings',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      if (request.user.role === 'housekeeper') return reply.code(403).send({ error: 'Forbidden' })
      const { slug } = request.params
      if (!canAccess(request.user.hotelSlug, request.user.role, slug)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const hotelId = await getHotelId(slug)
      if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })

      const { server_url, username, password, default_language, enabled, tl_token } = request.body

      await db.query(
        `INSERT INTO netup_settings (hotel_id, server_url, username, password, default_language, enabled, tl_token, updated_at)
         VALUES ($1, $2, $3, $4, $5, $6, $7, NOW())
         ON CONFLICT (hotel_id) DO UPDATE SET
           server_url       = EXCLUDED.server_url,
           username         = EXCLUDED.username,
           password         = CASE WHEN EXCLUDED.password = '' THEN netup_settings.password ELSE EXCLUDED.password END,
           default_language = EXCLUDED.default_language,
           enabled          = EXCLUDED.enabled,
           tl_token         = EXCLUDED.tl_token,
           updated_at       = NOW()`,
        [hotelId, server_url ?? '', username ?? 'admin', password ?? '', default_language ?? 'ru_RU', enabled ?? true, tl_token ?? ''],
      )
      return { ok: true }
    },
  )

  // ── POST /api/hotels/:slug/netup/test ────────────────────────────────────
  fastify.post<SlugParam>(
    '/api/hotels/:slug/netup/test',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      const { slug } = request.params
      if (!canAccess(request.user.hotelSlug, request.user.role, slug)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const hotelId = await getHotelId(slug)
      if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })

      const { rows } = await db.query(
        'SELECT server_url, username, password FROM netup_settings WHERE hotel_id = $1',
        [hotelId],
      )
      const cfg = rows[0]
      if (!cfg?.server_url) return reply.code(400).send({ error: 'Настройки не заполнены' })

      try {
        const result = await netupReq(cfg.server_url, cfg.username, cfg.password, 'GET', '/hotel-room')
        if (result.ok) return { ok: true, message: 'Подключение успешно' }
        return reply.code(502).send({ error: `NetUP вернул статус ${result.status}` })
      } catch (err) {
        const msg = err instanceof Error ? err.message : 'Ошибка соединения'
        return reply.code(502).send({ error: msg })
      }
    },
  )

  // ── GET /api/hotels/:slug/netup/rooms ────────────────────────────────────
  fastify.get<SlugParam>(
    '/api/hotels/:slug/netup/rooms',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      const { slug } = request.params
      if (!canAccess(request.user.hotelSlug, request.user.role, slug)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const hotelId = await getHotelId(slug)
      if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })

      const { rows } = await db.query(
        `SELECT r.id, r.number, r.type, COALESCE(m.netup_room_number, '') as netup_room_number
         FROM rooms r
         LEFT JOIN netup_room_mapping m ON m.pms_room_id = r.id AND m.hotel_id = $1
         WHERE r.hotel_id = $1
         ORDER BY r.number`,
        [hotelId],
      )
      return rows
    },
  )

  // ── POST /api/hotels/:slug/netup/rooms ───────────────────────────────────
  // Body: { mappings: [{ pms_room_id, netup_room_number }] }
  fastify.post<SlugParam & { Body: { mappings: { pms_room_id: string; netup_room_number: string }[] } }>(
    '/api/hotels/:slug/netup/rooms',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      if (request.user.role === 'housekeeper') return reply.code(403).send({ error: 'Forbidden' })
      const { slug } = request.params
      if (!canAccess(request.user.hotelSlug, request.user.role, slug)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const hotelId = await getHotelId(slug)
      if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })

      const { mappings } = request.body
      if (!Array.isArray(mappings)) return reply.code(400).send({ error: 'mappings required' })

      // Delete existing and insert fresh
      await db.query('DELETE FROM netup_room_mapping WHERE hotel_id = $1', [hotelId])

      for (const m of mappings) {
        if (m.netup_room_number?.trim()) {
          await db.query(
            `INSERT INTO netup_room_mapping (hotel_id, pms_room_id, netup_room_number)
             VALUES ($1, $2, $3) ON CONFLICT DO NOTHING`,
            [hotelId, m.pms_room_id, m.netup_room_number.trim()],
          )
        }
      }
      return { ok: true }
    },
  )

  // ── POST /api/hotels/:slug/netup/message ─────────────────────────────────
  // Отправить сообщение на TV в номер (из карточки брони)
  fastify.post<SlugParam & { Body: { room_id: string; message: string; guest_name?: string } }>(
    '/api/hotels/:slug/netup/message',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      if (request.user.role === 'housekeeper') return reply.code(403).send({ error: 'Forbidden' })
      const { slug } = request.params
      if (!canAccess(request.user.hotelSlug, request.user.role, slug)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const hotelId = await getHotelId(slug)
      if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })

      const { room_id, message, guest_name } = request.body
      if (!room_id || !message?.trim()) return reply.code(400).send({ error: 'room_id and message required' })

      // Get NetUP settings
      const { rows: [cfg] } = await db.query(
        'SELECT server_url, username, password FROM netup_settings WHERE hotel_id = $1 AND enabled = true',
        [hotelId],
      )
      if (!cfg?.server_url) return reply.code(400).send({ error: 'NetUP не настроен' })

      // Get room mapping
      const { rows: [mapping] } = await db.query(
        `SELECT m.netup_room_number, r.number as room_number
         FROM netup_room_mapping m
         JOIN rooms r ON r.id = m.pms_room_id
         WHERE m.hotel_id = $1 AND m.pms_room_id = $2`,
        [hotelId, room_id],
      )
      if (!mapping) return reply.code(400).send({ error: 'Сопоставление для этого номера не найдено' })

      try {
        const result = await netupReq(
          cfg.server_url, cfg.username, cfg.password,
          'POST', '/system-message',
          {
            name:           guest_name ? `Сообщение для ${guest_name}` : `Сообщение в номер ${mapping.room_number}`,
            recipient_type: 'all',
            recipient:      0,
            message,
          },
        )
        if (!result.ok) {
          return reply.code(502).send({ error: `NetUP вернул ошибку: ${result.status}` })
        }
        return { ok: true }
      } catch (err) {
        const msg = err instanceof Error ? err.message : 'Ошибка соединения'
        return reply.code(502).send({ error: msg })
      }
    },
  )

  // ── GET /api/hotels/:slug/netup/log ─────────────────────────────────────
  fastify.get<SlugParam>(
    '/api/hotels/:slug/netup/log',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      const { slug } = request.params
      if (!canAccess(request.user.hotelSlug, request.user.role, slug)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const hotelId = await getHotelId(slug)
      const { rows } = await db.query(
        `SELECT ts, action, room_number, netup_room, url, request_body,
                status, http_status, response_body, error
         FROM netup_push_log WHERE hotel_id = $1 ORDER BY ts DESC LIMIT 50`,
        [hotelId],
      )
      const pushEvents = rows.map((r: Record<string, unknown>) => ({
        ts:           (r.ts as Date).toISOString(),
        action:       r.action,
        roomNumber:   r.room_number,
        netupRoom:    r.netup_room,
        url:          r.url,
        requestBody:  r.request_body,
        status:       r.status,
        httpStatus:   r.http_status,
        responseBody: r.response_body,
        error:        r.error,
      }))
      return { pushEvents, pullRequests: [] }
    },
  )

  // ── DELETE /api/hotels/:slug/netup/log — очистить оба лога ───────────────
  fastify.delete<SlugParam>(
    '/api/hotels/:slug/netup/log',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      const { slug } = request.params
      if (!canAccess(request.user.hotelSlug, request.user.role, slug)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const hotelId2 = await getHotelId(slug)
      if (hotelId2) await db.query('DELETE FROM netup_push_log WHERE hotel_id = $1', [hotelId2])
      pushLog.length = 0
      return { ok: true }
    },
  )

  // ── POST /api/hotels/:slug/netup/test-checkin — ручной тест заселения ────
  fastify.post<SlugParam & { Body: { room_id: string } }>(
    '/api/hotels/:slug/netup/test-checkin',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      const { slug } = request.params
      if (!canAccess(request.user.hotelSlug, request.user.role, slug)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const hotelId = await getHotelId(slug)
      if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })

      const { room_id } = request.body
      if (!room_id) return reply.code(400).send({ error: 'room_id required' })

      // Get room info
      const { rows: [room] } = await db.query(
        'SELECT id, number FROM rooms WHERE id = $1 AND hotel_id = $2',
        [room_id, hotelId],
      )
      if (!room) return reply.code(404).send({ error: 'Room not found' })

      const result = await notifyNetupCheckinInternal(
        hotelId, room_id, room.number, 'Тестовый гость', '99999999',
      )
      if (result.ok) return { ok: true, message: `Check-in отправлен в NetUP (номер ${result.netupRoom})` }
      return reply.code(502).send({ error: result.error ?? 'Ошибка' })
    },
  )
}

// ── Internal helpers ──────────────────────────────────────────────────────────

async function getNetupCfg(hotelId: string, needEnabled = true) {
  const cond = needEnabled ? 'AND enabled = true' : ''
  const { rows: [cfg] } = await db.query(
    `SELECT server_url, username, password, default_language FROM netup_settings WHERE hotel_id = $1 ${cond}`,
    [hotelId],
  )
  return cfg as { server_url: string; username: string; password: string; default_language: string } | undefined
}

async function getMapping(hotelId: string, roomId: string) {
  const { rows: [m] } = await db.query(
    `SELECT m.netup_room_number, r.number as room_number
     FROM netup_room_mapping m
     JOIN rooms r ON r.id = m.pms_room_id
     WHERE m.hotel_id = $1 AND m.pms_room_id = $2`,
    [hotelId, roomId],
  )
  return m as { netup_room_number: string; room_number: string } | undefined
}

async function notifyNetupCheckinInternal(
  hotelId: string, roomId: string, roomNumber: string,
  guestName: string, reservationId: string, language?: string,
): Promise<{ ok: boolean; netupRoom?: string; error?: string }> {
  const cfg = await getNetupCfg(hotelId)
  if (!cfg?.server_url) {
    recordPush({ ts: new Date().toISOString(), action: 'check-in', hotelId, roomNumber, netupRoom: '', url: '', status: 'skipped', error: 'NetUP не настроен или отключён' })
    return { ok: false, error: 'NetUP не настроен или отключён' }
  }

  const mapping = await getMapping(hotelId, roomId)
  if (!mapping) {
    recordPush({ ts: new Date().toISOString(), action: 'check-in', hotelId, roomNumber, netupRoom: '', url: '', status: 'skipped', error: 'Сопоставление номера не найдено' })
    return { ok: false, error: 'Сопоставление номера не найдено' }
  }

  const base = cfg.server_url.replace(/\/$/, '')
  const url  = `${base}/mw/api/hotel-room/${encodeURIComponent(mapping.netup_room_number)}/check-in`
  const cred = Buffer.from(`${cfg.username}:${cfg.password}`).toString('base64')

  // NetUP expects reservation_id as a numeric string (parses with strconv.Atoi)
  // Convert UUID to a stable numeric string by taking first 8 hex chars → decimal
  const resIdStr = String(parseInt(reservationId.replace(/-/g, '').slice(0, 8), 16) % 100000000)
  const requestBody = { reservation_id: resIdStr, name: guestName, language: language ?? cfg.default_language }

  try {
    const res = await fetch(url, {
      method:  'POST',
      headers: { Authorization: `Basic ${cred}`, 'Content-Type': 'application/json' },
      body:    JSON.stringify(requestBody),
      signal:  AbortSignal.timeout(6000),
    })
    const responseText = await res.text().catch(() => '')
    const event: PushEvent = {
      ts: new Date().toISOString(), action: 'check-in', hotelId,
      roomNumber, netupRoom: mapping.netup_room_number, url,
      requestBody,
      status: res.ok ? 'ok' : 'error', httpStatus: res.status,
      responseBody: responseText || undefined,
    }
    if (!res.ok) event.error = `HTTP ${res.status}`
    recordPush(event)
    return res.ok ? { ok: true, netupRoom: mapping.netup_room_number } : { ok: false, error: `HTTP ${res.status}: ${responseText}` }
  } catch (err) {
    const error = err instanceof Error ? err.message : 'Ошибка соединения'
    recordPush({ ts: new Date().toISOString(), action: 'check-in', hotelId, roomNumber, netupRoom: mapping.netup_room_number, url, requestBody, status: 'error', error })
    return { ok: false, error }
  }
}

// ── Public functions called from bookings.ts ──────────────────────────────────

export async function notifyNetupCheckin(hotelId: string, roomId: string, guestName: string, reservationId: string, language?: string) {
  // Get room number for logging
  const { rows: [r] } = await db.query('SELECT number FROM rooms WHERE id = $1', [roomId]).catch(() => ({ rows: [] }))
  await notifyNetupCheckinInternal(hotelId, roomId, r?.number ?? roomId, guestName, reservationId, language)
}

export async function notifyNetupCheckout(hotelId: string, roomId: string) {
  const cfg = await getNetupCfg(hotelId)
  if (!cfg?.server_url) return

  const mapping = await getMapping(hotelId, roomId)
  const { rows: [r] } = await db.query('SELECT number FROM rooms WHERE id = $1', [roomId]).catch(() => ({ rows: [] }))
  const roomNumber = r?.number ?? roomId

  if (!mapping) {
    recordPush({ ts: new Date().toISOString(), action: 'check-out', hotelId, roomNumber, netupRoom: '', url: '', status: 'skipped', error: 'Сопоставление номера не найдено' })
    return
  }

  const base = cfg.server_url.replace(/\/$/, '')
  const url  = `${base}/mw/api/hotel-room/${encodeURIComponent(mapping.netup_room_number)}/check-out`
  const cred = Buffer.from(`${cfg.username}:${cfg.password}`).toString('base64')

  try {
    const res = await fetch(url, {
      method:  'POST',
      headers: { Authorization: `Basic ${cred}` },
      signal:  AbortSignal.timeout(6000),
    })
    const responseText = await res.text().catch(() => '')
    recordPush({
      ts: new Date().toISOString(), action: 'check-out', hotelId,
      roomNumber, netupRoom: mapping.netup_room_number, url,
      status: res.ok ? 'ok' : 'error', httpStatus: res.status,
      responseBody: responseText || undefined,
      error: res.ok ? undefined : `HTTP ${res.status}`,
    })
  } catch (err) {
    const error = err instanceof Error ? err.message : 'Ошибка соединения'
    recordPush({ ts: new Date().toISOString(), action: 'check-out', hotelId, roomNumber, netupRoom: mapping.netup_room_number, url, status: 'error', error })
  }
}

export default netup