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

type SlugParam = { Params: { slug: string } }

const hotelSettings: 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

  // ── GET /api/hotels/:slug/hotel-settings ─────────────────────────────────
  fastify.get<SlugParam>(
    '/api/hotels/:slug/hotel-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: settingsRows }, { rows: hotelRows }] = await Promise.all([
        db.query('SELECT key, value FROM hotel_settings WHERE hotel_id = $1', [hotelId]),
        db.query('SELECT check_in_time, check_out_time FROM hotels WHERE id = $1', [hotelId]),
      ])
      const out: Record<string, unknown> = {}
      for (const row of settingsRows) {
        out[row.key] = row.value
      }
      if (hotelRows[0]) {
        out.check_in_time  = hotelRows[0].check_in_time
        out.check_out_time = hotelRows[0].check_out_time
      }
      return out
    },
  )

  // ── PATCH /api/hotels/:slug/hotel-settings ───────────────────────────────
  fastify.patch<SlugParam & { Body: Record<string, unknown> }>(
    '/api/hotels/:slug/hotel-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 updates = request.body
      for (const [key, value] of Object.entries(updates)) {
        await db.query(
          `INSERT INTO hotel_settings (hotel_id, key, value, updated_at)
           VALUES ($1, $2, $3::jsonb, NOW())
           ON CONFLICT (hotel_id, key) DO UPDATE
             SET value = EXCLUDED.value, updated_at = NOW()`,
          [hotelId, key, JSON.stringify(value)],
        )
      }
      return { ok: true }
    },
  )
}

export default hotelSettings