import { generateTag, generateTagsFromSystem } from "@/utils/generateTag"

import { getHotel } from "../../hotels/query"
import { getHotelIdsByCityIdentifier } from "../../hotels/utils"
import { getHotelPageUrl } from "../hotelPage/utils"

import type { HotelData } from "@/types/hotel"
import type { System } from "@/types/requests/system"
import type { GetDestinationCityPageRefsSchema } from "@/types/trpc/routers/contentstack/destinationCityPage"
import type { Lang } from "@/constants/languages"

export function generatePageTags(
  validatedData: GetDestinationCityPageRefsSchema,
  lang: Lang
): string[] {
  const connections = getConnections(validatedData)
  return [
    generateTagsFromSystem(lang, connections),
    generateTag(lang, validatedData.destination_city_page.system.uid),
  ].flat()
}

export function getConnections({
  destination_city_page,
}: GetDestinationCityPageRefsSchema) {
  const connections: System["system"][] = [destination_city_page.system]
  if (destination_city_page.sidepeek_content) {
    destination_city_page.sidepeek_content.content.embedded_itemsConnection.edges.forEach(
      ({ node }) => {
        connections.push(node.system)
      }
    )
  }

  return connections
}

export async function getHotelListData(
  lang: Lang,
  serviceToken: string,
  cityIdentifier: string
) {
  const hotelIds = await getHotelIdsByCityIdentifier(
    cityIdentifier,
    serviceToken
  )

  const hotels = await Promise.all(
    hotelIds.map(async (hotelId) => {
      const [hotelData, url] = await Promise.all([
        getHotel({ hotelId, language: lang }, serviceToken),
        getHotelPageUrl(lang, hotelId),
      ])

      return hotelData ? { ...hotelData, url } : null
    })
  )

  return hotels.filter(
    (hotel): hotel is HotelData & { url: string | null } => !!hotel
  )
}