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

type SlugParam    = { Params: { slug: string } }
type SlugRoleParam = { Params: { slug: string; roleKey: string } }

const rolePermissionsRoute: 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

  const canManage = (role: string) =>
    ['manager', 'hotel_admin', 'super_admin'].includes(role)

  // ── GET /api/hotels/:slug/role-permissions ─────────────────────────────────
  fastify.get<SlugParam>(
    '/api/hotels/:slug/role-permissions',
    { 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 id, hotel_id, role_key, name, color, is_system, permissions, created_at, updated_at
           FROM role_permissions
          WHERE hotel_id = $1
          ORDER BY is_system DESC, name`,
        [hotelId],
      )
      return rows
    },
  )

  // ── PUT /api/hotels/:slug/role-permissions/:roleKey ────────────────────────
  fastify.put<SlugRoleParam & {
    Body: { name: string; color: string; isSystem?: boolean; permissions: Record<string, boolean> }
  }>(
    '/api/hotels/:slug/role-permissions/:roleKey',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      if (!canManage(request.user.role)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const { slug, roleKey } = 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, color, isSystem = false, permissions } = request.body

      const { rows } = await db.query(
        `INSERT INTO role_permissions (hotel_id, role_key, name, color, is_system, permissions)
              VALUES ($1, $2, $3, $4, $5, $6)
         ON CONFLICT (hotel_id, role_key) DO UPDATE
                 SET name = EXCLUDED.name,
                     color = EXCLUDED.color,
                     permissions = EXCLUDED.permissions,
                     updated_at = NOW()
           RETURNING *`,
        [hotelId, roleKey, name, color, isSystem, JSON.stringify(permissions)],
      )
      return rows[0]
    },
  )

  // ── DELETE /api/hotels/:slug/role-permissions/:roleKey ─────────────────────
  fastify.delete<SlugRoleParam>(
    '/api/hotels/:slug/role-permissions/:roleKey',
    { onRequest: [fastify.authenticate] },
    async (request, reply) => {
      if (!canManage(request.user.role)) {
        return reply.code(403).send({ error: 'Forbidden' })
      }
      const { slug, roleKey } = 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' })

      // System roles cannot be deleted
      const { rows: existing } = await db.query(
        'SELECT is_system FROM role_permissions WHERE hotel_id = $1 AND role_key = $2',
        [hotelId, roleKey],
      )
      if (existing[0]?.is_system) {
        return reply.code(403).send({ error: 'Нельзя удалить системную роль' })
      }

      const { rowCount } = await db.query(
        'DELETE FROM role_permissions WHERE hotel_id = $1 AND role_key = $2',
        [hotelId, roleKey],
      )
      if (!rowCount) return reply.code(404).send({ error: 'Role not found' })
      return reply.code(204).send()
    },
  )
}

export default rolePermissionsRoute