package v3

import (
	"encoding/json"
	"log/slog"
	"net/http"
)

/*

{
  "hydra:member": [
    {
      "@context": "string",
      "@id": "string",
      "@type": "string",
      "id": "string",
      "kuerzel": "string",
      "beschreibung": "string",
      "hinweisOne": "string",
      "hinweisTwo": "string",
      "plaetze": 0
    }
  ],
  "hydra:totalItems": 0,
  "hydra:view": {
    "@id": "string",
    "type": "string",
    "hydra:first": "string",
    "hydra:last": "string",
    "hydra:previous": "string",
    "hydra:next": "string"
  },
  "hydra:search": {
    "@type": "string",
    "hydra:template": "string",
    "hydra:variableRepresentation": "string",
    "hydra:mapping": [
      {
        "@type": "string",
        "variable": "string",
        "property": "string",
        "required": true
      }
    ]
  }
}

*/

// room Model for fetching json data

type Rooms struct {
	TotalItems int    `json:"hydra:totalItems"`
	Rooms      []Room `json:"hydra:member"`
}

type Room struct {
	ID          string `json:"id"`
	ShortCut    string `json:"kuerzel"`
	Description string `json:"beschreibung"`
	Seats       int    `json:"plaetze"`
	Note1       string `json:"hinweisOne"`
	Note2       string `json:"hinweisTwo"`
}

func parseRooms(url string, client *http.Client) (Rooms, error) {

	// the url is paginated, so we need to fetch all pages
	// example url: https://luna.htwk-leipzig.de/api/raum?page=1&itemsPerPage=100
	// the itemsPerPage is set to 100, so we need to fetch all pages until we get an empty response

	var fetchedRooms Rooms
	var itemsPerPage = 999

	responses, err := paginatedFetch(url, itemsPerPage, client)

	if err != nil {
		slog.Error("Error while fetching paginated api", err)
		return fetchedRooms, err
	}

	for _, response := range responses {
		var rooms Rooms
		err = json.Unmarshal([]byte(response), &rooms)
		if err != nil {
			slog.Error("Error while unmarshalling rooms", err)
			return fetchedRooms, err
		}
		fetchedRooms.Rooms = append(fetchedRooms.Rooms, rooms.Rooms...)
	}
	return fetchedRooms, nil
}