export class EventManager {
  mainmanager;

  #events = new Map([]);

  constructor() {}

  async getAllEvents() {
    // DO NOT use this function for general use - may overload the server(s). get ONCE and then cache!
    const currentLocalization = this.mainmanager.getCurrentLangCode();

    let allEventsReqSend = fetch(`/data/${currentLocalization}/events/`);

    let allEventsReq = await allEventsReqSend;
    let allEvents;
    if (allEventsReq.ok) allEvents = await allEventsReq.json();

    allEvents.sort(
      (e1, e2) =>
        new Date(e2.when.start).getTime() - new Date(e1.when.start).getTime()
    );

    return allEvents;
  }

  async getEvents() {
    const currentLocalization = this.mainmanager.getCurrentLangCode();
    const currentFloor = this.mainmanager.getCurrentFocus("floor");

    let allEventsReqSend = fetch(
      `/data/${currentLocalization}/events/${currentFloor}`
    );

    let allEventsReq = await allEventsReqSend;
    let allEvents;
    if (allEventsReq.ok) allEvents = await allEventsReq.json();

    // Sort by date

    allEvents.sort(
      (e1, e2) =>
        new Date(e2.when.start).getTime() - new Date(e1.when.start).getTime()
    );

    this.#events.clear();

    allEvents.forEach((event) => this.#events.set(event.id, event));
  }

  setCurrentEvent(id) {
    if (id == null) this.mainmanager.setCurrentFocus("event", id);
    else {
      const event = this.#events.get(id);
      if (event != null) this.mainmanager.setCurrentFocus("event", id);
      else throw "Event does not exist";
    }
  }

  get currentRoomEvents() {
    const currentFocus = this.mainmanager.getCurrentFocus("room");
    let currentFloorRooms = new Map([]);
    this.#events.forEach((v, k) => {
      if (k.startsWith(currentFocus)) currentFloorRooms.set(k, v);
    });
    return currentFloorRooms;
  }

  get allEvents() {
    return this.#events;
  }

  get currentEventId() {
    return this.mainmanager.getCurrentFocus("event");
  }

  get currentEvent() {
    const currentEvent = this.#events.get(
      this.mainmanager.getCurrentFocus("event")
    );
    return currentEvent;
  }
}