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

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

const categories: 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/categories
  fastify.get<SlugParam>(
    '/api/hotels/:slug/categories',
    { 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 * FROM room_categories WHERE hotel_id = $1 ORDER BY sort_order, created_at`,
        [hotelId],
      )
      return rows
    },
  )

  // POST /api/hotels/:slug/categories
  fastify.post<SlugParam & { Body: {
    name: string; description?: string; color?: string
    amenities?: string[]; photos?: string[]; sort_order?: number
  } }>(
    '/api/hotels/:slug/categories',
    { 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 { name, description = '', color = '#4F46E5', amenities = [], photos = [], sort_order = 0 } = request.body
      const { rows } = await db.query(
        `INSERT INTO room_categories (hotel_id, name, description, color, amenities, photos, sort_order)
         VALUES ($1,$2,$3,$4,$5,$6,$7) RETURNING *`,
        [hotelId, name, description, color, amenities, photos, sort_order],
      )
      return reply.code(201).send(rows[0])
    },
  )

  // PATCH /api/hotels/:slug/categories/:id
  fastify.patch<SlugIdParam & { Body: {
    name?: string; description?: string; color?: string
    amenities?: string[]; photos?: string[]; sort_order?: number
  } }>(
    '/api/hotels/:slug/categories/:id',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      const { slug, id } = 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 b = request.body
      const sets: string[] = ['updated_at = NOW()']
      const vals: unknown[] = [hotelId, id]
      let i = 3
      if (b.name        !== undefined) { sets.push(`name = $${i++}`);        vals.push(b.name) }
      if (b.description !== undefined) { sets.push(`description = $${i++}`); vals.push(b.description) }
      if (b.color       !== undefined) { sets.push(`color = $${i++}`);       vals.push(b.color) }
      if (b.amenities   !== undefined) { sets.push(`amenities = $${i++}`);   vals.push(b.amenities) }
      if (b.photos      !== undefined) { sets.push(`photos = $${i++}`);      vals.push(b.photos) }
      if (b.sort_order  !== undefined) { sets.push(`sort_order = $${i++}`);  vals.push(b.sort_order) }
      const { rows } = await db.query(
        `UPDATE room_categories SET ${sets.join(', ')} WHERE hotel_id=$1 AND id=$2 RETURNING *`,
        vals,
      )
      if (!rows[0]) return reply.code(404).send({ error: 'Not found' })
      return rows[0]
    },
  )

  // DELETE /api/hotels/:slug/categories/:id
  fastify.delete<SlugIdParam>(
    '/api/hotels/:slug/categories/:id',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      const { slug, id } = 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' })
      await db.query('DELETE FROM room_categories WHERE hotel_id=$1 AND id=$2', [hotelId, id])
      return reply.code(204).send()
    },
  )
}

export default categories