import {
  getMinutesDifference,
  getRelativeTime,
} from "../modules/relative_time.js";
import localization from "./localization.js";

export class UIManager {
  ui;
  map;
  floormanager;
  eventmanager;

  uiElements = {};
  floorsEmpty = true;
  eventsEmpty = true;

  constructor(ui, map) {
    this.ui = ui;
    this.map = map;

    // Zoom
    this.uiElements.zoomButtons = this.ui.querySelector("#zoom");
    this.uiElements.zoomIn =
      this.uiElements.zoomButtons.querySelector("#zoom-in");
    this.uiElements.zoomOut =
      this.uiElements.zoomButtons.querySelector("#zoom-out");

    // Floors
    this.uiElements.floors = this.ui.querySelector("#floors");
    this.uiElements.floorsHeading = this.ui.querySelector(
      "#floors .widget-heading"
    );
    this.uiElements.floorButtons =
      this.uiElements.floors.querySelector("#floor-buttons");

    // Events
    this.uiElements.eventsContainer =
      this.ui.querySelector("#events-container");
    this.uiElements.events =
      this.uiElements.eventsContainer.querySelector("#events");
    this.uiElements.eventsBackButton = this.uiElements.events.querySelector(
      "#events-header #back"
    );
    this.uiElements.eventsRoomName = this.uiElements.events.querySelector(
      "#events-header #room-name"
    );
    this.uiElements.eventsRoomDescription =
      this.uiElements.events.querySelector("#events-header #room-description");
    this.uiElements.eventList =
      this.uiElements.events.querySelector("#event-list");
    this.uiElements.eventsMinimized =
      this.uiElements.eventsContainer.querySelector("#events-minimized");
    this.uiElements.eventsMinimizedBackButton =
      this.uiElements.eventsMinimized.querySelector("#back");

    this.uiElements.minimizeButton = this.uiElements.events.querySelector(
      "#footer #footer-buttons #minimize"
    );
    this.uiElements.maximizeButton =
      this.uiElements.eventsMinimized.querySelector("#maximize");

    // Loading
    this.uiElements.loading = this.ui.querySelector("#loading");

    // Zoom buttons
    this.__initZoom();

    this.__initEvents();
  }

  __initZoom() {
    this.uiElements.zoomIn.addEventListener("click", () => {
      this.map.zoomLevel += 1;
    });
    this.uiElements.zoomOut.addEventListener("click", () => {
      this.map.zoomLevel -= 1;
    });
    this.map.kp.onUpdate(() => {
      if (this.map.zoomLevelLimit > 0) {
        this.uiElements.zoomIn.disabled = true;
        this.uiElements.zoomOut.disabled = false;
      } else if (this.map.zoomLevelLimit < 0) {
        this.uiElements.zoomIn.disabled = false;
        this.uiElements.zoomOut.disabled = true;
      } else {
        this.uiElements.zoomIn.disabled = false;
        this.uiElements.zoomOut.disabled = false;
      }
    });
  }

  toggleEventsMinimized() {
    this.uiElements.eventsContainer.classList.toggle("minimized");
  }

  eventsMinimize() {
    this.uiElements.eventsContainer.classList.add("minimized");
  }

  eventsMaximize() {
    this.uiElements.eventsContainer.classList.remove("minimized");
  }

  __updateAll() {
    this.__updateEvents();
    this.__updateFloorsHard();
  }

  __initEvents() {
    this.uiElements.eventsBackButton.addEventListener("click", () => {
      this.floormanager.setCurrentRoom("");
    });
    this.uiElements.eventsMinimizedBackButton.addEventListener("click", () => {
      this.floormanager.setCurrentRoom("", false);
    });

    this.uiElements.minimizeButton.addEventListener("click", () => {
      this.uiElements.eventsContainer.classList.add("minimized");
    });
    this.uiElements.maximizeButton.addEventListener("click", () => {
      this.uiElements.eventsContainer.classList.remove("minimized");
    });
  }

  __updateEvents() {
    const currentLocalization = localization.get(this.floormanager.lang);

    this.uiElements.minimizeButton.title = currentLocalization.minimize;
    this.uiElements.maximizeButton.title = currentLocalization.maximize;
    // Figure out header

    if (this.floormanager.currentRoomItem != null) {
      this.uiElements.eventsRoomName.textContent =
        currentLocalization.events_in(this.floormanager.currentRoomItem.name);
      this.uiElements.eventsRoomDescription.textContent =
        this.floormanager.currentRoomItem.description;
      this.uiElements.eventsBackButton.disabled = false;
      this.uiElements.eventsBackButton.title =
        currentLocalization.view_events_in(
          this.floormanager.currentFloorItem.name
        );
      this.uiElements.eventsMinimizedBackButton.disabled = false;
      this.uiElements.eventsMinimizedBackButton.title =
        currentLocalization.view_events_in(
          this.floormanager.currentFloorItem.name
        );
    } else {
      this.uiElements.eventsRoomName.textContent =
        currentLocalization.events_in(this.floormanager.currentFloorItem.name);
      this.uiElements.eventsRoomDescription.textContent =
        this.floormanager.currentFloorItem.description;
      this.uiElements.eventsBackButton.disabled = true;
      this.uiElements.eventsBackButton.title = "";
      this.uiElements.eventsMinimizedBackButton.disabled = true;
      this.uiElements.eventsMinimizedBackButton.title = "";
    }

    // Remove all children
    this.uiElements.eventList.replaceChildren();

    // Put them back

    const currentDate = new Date();
    this.eventmanager.events.forEach((event, id) => {
      if (
        this.floormanager.currentRoomItem &&
        event.where != this.floormanager.currentRoom
      )
        return; // Don't display this event

      const eventFloor = this.floormanager.currentFloorRooms.get(event.where);
      const eventDateStart = new Date(event.when.start);
      const eventDateEnd = new Date(event.when.end);

      const eventStarted = currentDate > eventDateStart;
      const eventEnded = currentDate > eventDateEnd;

      let datePrefix;

      if (eventEnded) {
        return; // Don't display this event
      } else if (eventStarted) {
        datePrefix = currentLocalization.date_started;
      } else {
        datePrefix = currentLocalization.date_starting;
      }

      const eventListContainer = document.createElement("details");
      eventListContainer.classList.add("event-list-container");
      eventListContainer.id = "event-" + id;

      const eventListContainerSummary = document.createElement("summary");

      const eventListContainerSummaryName = document.createElement("b");
      eventListContainerSummaryName.textContent = event.name;

      eventListContainerSummary.appendChild(eventListContainerSummaryName);

      eventListContainerSummary.appendChild(document.createTextNode(" "));

      if (this.floormanager.currentRoomItem == null) {
        const eventListContainerSummaryRoom = document.createElement("button");
        eventListContainerSummaryRoom.classList.add("link");
        eventListContainerSummaryRoom.addEventListener("click", () => {
          this.floormanager.setCurrentRoom(eventFloor.id);
        });
        eventListContainerSummaryRoom.textContent =
          currentLocalization.parenthesis(eventFloor.name);

        eventListContainerSummary.appendChild(eventListContainerSummaryRoom);
      }

      eventListContainerSummary.appendChild(document.createElement("br"));

      const eventListContainerSummarySmall = document.createElement("small");

      const eventListContainerSummaryTime = document.createElement("span");
      eventListContainerSummaryTime.classList.add("clarification");
      eventListContainerSummaryTime.title = eventDateStart.toLocaleString(
        this.floormanager.lang.replace(/_/g, "-")
      );
      eventListContainerSummaryTime.textContent =
        currentLocalization.date_summary(
          datePrefix,
          getRelativeTime(
            eventDateStart,
            currentDate,
            this.floormanager.lang.replace(/_/g, "-")
          )
        );

      eventListContainerSummarySmall.appendChild(eventListContainerSummaryTime);

      eventListContainerSummarySmall.appendChild(document.createTextNode(" "));

      const eventListContainerSummaryLength = document.createElement("span");
      eventListContainerSummaryLength.textContent =
        currentLocalization.parenthesis(
          currentLocalization.minutes_long(
            getMinutesDifference(eventDateStart, eventDateEnd)
          )
        );

      eventListContainerSummarySmall.appendChild(
        eventListContainerSummaryLength
      );

      eventListContainerSummary.appendChild(eventListContainerSummarySmall);

      eventListContainer.appendChild(eventListContainerSummary);

      const eventListContainerDescription = document.createElement("p");
      eventListContainerDescription.textContent = event.description;

      eventListContainer.appendChild(eventListContainerDescription);

      this.uiElements.eventList.appendChild(eventListContainer);
    });

    if (this.eventmanager.events.size < 1) {
      this.uiElements.eventList.classList.add("empty");
      this.eventsEmpty = true;
    } else {
      this.uiElements.eventList.classList.remove("empty");
      this.eventsEmpty = false;
    }
  }

  setLoading(state) {
    if (state) {
      this.ui.classList.add("loading");
    } else {
      this.ui.classList.remove("loading");
    }
  }

  __updateFloorsHard() {
    const currentLocalization = localization.get(this.floormanager.lang);
    // Remove all children
    this.uiElements.floorButtons.replaceChildren();
    this.uiElements.floorsHeading.textContent =
      currentLocalization.floors_header;

    // Put them back
    this.floormanager.floors.forEach(({ name }, id) => {
      const floorButton = document.createElement("button");
      floorButton.textContent = name;
      floorButton.classList.add("floor-button");
      floorButton.id = "floor-" + id;
      if (id === this.floormanager.currentFloor)
        floorButton.classList.add("selected");
      floorButton.addEventListener("click", () =>
        this.floormanager.changeFloor(id)
      );

      this.uiElements.floorButtons.appendChild(floorButton);
    });

    if (this.floormanager.floors.size < 1) {
      this.uiElements.floors.classList.add("empty");
      this.floorsEmpty = true;
    } else {
      this.uiElements.floors.classList.remove("empty");
      this.floorsEmpty = false;
    }
  }

  __updateFloorsSoft() {
    const currentLocalization = localization.get(this.floormanager.lang);

    this.uiElements.floorsHeading.textContent =
      currentLocalization.floors_header;

    this.floormanager.floors.forEach(({ name }, id) => {
      const child = this.uiElements.floorButtons.querySelector("#floor-" + id);
      if (id === this.floormanager.currentFloor)
        child.classList.add("selected");
      else child.classList.remove("selected");
    });
  }
}