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

export class UIManager {
  ui;
  mainmanager;

  uiElements = {};
  floorsEmpty = true;

  constructor(ui) {
    this.ui = ui;
  }

  mainmanagerInit() {
    this.__initUIElements();

    this.__initZoom();

    this.__initEvents();

    this.__initInspector();
  }

  // State

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

  setZoomDisabled(state = 0) {
    if (state > 0) {
      this.uiElements.zoomIn.disabled = true;
      this.uiElements.zoomOut.disabled = false;
    } else if (state < 0) {
      this.uiElements.zoomIn.disabled = false;
      this.uiElements.zoomOut.disabled = true;
    } else {
      this.uiElements.zoomIn.disabled = false;
      this.uiElements.zoomOut.disabled = false;
    }
  }

  setEventsMinimized(state) {
    if (state) {
      this.uiElements.eventsContainer.classList.add("minimized");
    } else {
      this.uiElements.eventsContainer.classList.remove("minimized");
    }
  }

  setEventsInspector(state) {
    this.setEventsMinimized(false);
    if (state) {
      this.uiElements.eventsContainer.classList.add("inspector");
    } else {
      this.uiElements.eventsContainer.classList.remove("inspector");
    }
  }

  getEventsEmpty() {
    return this.uiElements.events.classList.contains("empty");
  }

  // Init

  __initUIElements() {
    // 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.eventsInspector =
      this.uiElements.eventsContainer.querySelector("#events-inspector");
    this.uiElements.eventsInspectorHeader =
      this.uiElements.eventsInspector.querySelector("#events-header");
    this.uiElements.eventsInspectorRoomName =
      this.uiElements.eventsInspectorHeader.querySelector("#room-name");
    this.uiElements.eventsInspectorEventLength =
      this.uiElements.eventsInspectorHeader.querySelector("#event-length");
    this.uiElements.eventsInspectorRoomTime =
      this.uiElements.eventsInspector.querySelector("#room-time");
    this.uiElements.eventsInspectorMinimized =
      this.uiElements.eventsContainer.querySelector(
        "#events-inspector-minimized"
      );
    this.uiElements.eventsInspectorBackButton =
      this.uiElements.eventsInspector.querySelector("#back");
    this.uiElements.eventsInspectorBody =
      this.uiElements.eventsInspector.querySelector("#event-body");
    this.uiElements.eventsInspectorMinimizedBackButton =
      this.uiElements.eventsInspectorMinimized.querySelector("#back");

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

    this.uiElements.eventsInspectorMinimizeButton =
      this.uiElements.eventsInspector.querySelector(
        "#footer #footer-buttons #minimize"
      );
    this.uiElements.eventsInspectorMaximizeButton =
      this.uiElements.eventsInspectorMinimized.querySelector("#maximize");

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

  __initZoom() {
    this.uiElements.zoomIn.addEventListener("click", () =>
      this.mainmanager.callManagerFunction("map", "zoomIn")
    );
    this.uiElements.zoomOut.addEventListener("click", () =>
      this.mainmanager.callManagerFunction("map", "zoomOut")
    );
    this.mainmanager.addManagerEventListener("map", "zoomMin", () => {
      this.setZoomDisabled(-1);
    });
    this.mainmanager.addManagerEventListener("map", "zoomMax", () => {
      this.setZoomDisabled(1);
    });
    this.mainmanager.addManagerEventListener("map", "zoom", () => {
      this.setZoomDisabled(0);
    });
  }

  __initInspector() {
    this.uiElements.eventsInspectorMinimizeButton.addEventListener(
      "click",
      () => this.setEventsMinimized(true)
    );
    this.uiElements.eventsInspectorMaximizeButton.addEventListener(
      "click",
      () => this.setEventsMinimized(false)
    );
    this.uiElements.eventsInspectorBackButton.addEventListener("click", () => {
      window.location.hash = this.mainmanager.getCurrentFocus("room");
    });
    this.uiElements.eventsInspectorMinimizedBackButton.addEventListener(
      "click",
      () => {
        window.location.hash = this.mainmanager.getCurrentFocus("room");
      }
    );
  }

  updateInspector() {
    const currentLocalization = this.mainmanager.getCurrentLocalization();

    const currentEvent = this.mainmanager.getCurrentFocusObject("event");
    const eventRoom = this.mainmanager.getCurrentFocusObject("room");

    this.uiElements.eventsInspectorBackButton.title =
      currentLocalization.event_inspector_back;
    this.uiElements.eventsInspectorMinimizedBackButton.title =
      currentLocalization.event_inspector_back;
    this.uiElements.eventsInspectorMinimizeButton.title =
      currentLocalization.event_inspector_minimize;
    this.uiElements.eventsInspectorMaximizeButton.title =
      currentLocalization.event_inspector_maximize;

    const currentDate = new Date();
    const eventDateStart = new Date(currentEvent.when.start);
    const eventDateEnd = new Date(currentEvent.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;
    }

    this.uiElements.eventsInspectorRoomName.textContent =
      currentLocalization.event_inspector_header(currentEvent.name);
    this.uiElements.eventsInspectorRoomTime.textContent =
      currentLocalization.date_summary(
        datePrefix,
        getRelativeTime(
          eventDateStart,
          currentDate,
          this.mainmanager.getCurrentLangCode()
        )
      ) +
      " " +
      currentLocalization.parenthesis(
        DatetoLocaleDynamicString(
          eventDateStart,
          currentDate,
          this.mainmanager.getCurrentLangCode()
        )
      );
    this.uiElements.eventsInspectorEventLength.textContent =
      currentLocalization.separator(
        currentLocalization.minutes_long(
          getMinutesDifference(eventDateStart, eventDateEnd)
        ),
        ""
      );

    const eventWhere = document.createElement("a");
    eventWhere.href = "#" + eventRoom.id;
    eventWhere.textContent = eventRoom.name;

    this.uiElements.eventsInspectorEventLength.appendChild(eventWhere);

    // Remove all children

    this.uiElements.eventsInspectorBody.replaceChildren();

    if (currentEvent.url) {
      const eventLink = document.createElement("p");
      eventLink.classList.add("widget-description");
      const eventAnchor = document.createElement("a");
      const eventURL = new URL(currentEvent.url);

      eventAnchor.href = eventURL;
      eventAnchor.target = "_blank";
      eventAnchor.textContent = eventURL.toString();

      eventLink.appendChild(eventAnchor);

      this.uiElements.eventsInspectorBody.appendChild(eventLink);
    }

    this.uiElements.eventsInspectorBody.appendChild(
      document.createElement("hr")
    );

    const eventDescription = document.createElement("p");
    eventDescription.classList.add("widget-description");

    eventDescription.textContent = currentEvent.description;

    this.uiElements.eventsInspectorBody.appendChild(eventDescription);
  }

  __initEvents() {
    this.uiElements.eventsBackButton.addEventListener("click", () => {
      window.location.hash = this.mainmanager.getCurrentFocus("floor");
    });
    this.uiElements.eventsMinimizedBackButton.addEventListener("click", () => {
      window.location.hash = this.mainmanager.getCurrentFocus("floor");
    });

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

  __updateEventsSoft() {
    const focusedFloor = this.mainmanager.getCurrentFocusObject("floor");

    if (focusedFloor == null) {
      this.uiElements.eventsContainer.classList.add("empty");
    } else {
      this.uiElements.eventsContainer.classList.remove("empty");
    }
  }

  updateEvents() {
    const currentLocalization = this.mainmanager.getCurrentLocalization();

    const currentEvents = this.mainmanager.getAllFocusObject("event");

    const focusedFloor = this.mainmanager.getCurrentFocusObject("floor");
    const focusedRoom = this.mainmanager.getCurrentFocusObject("room");

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

    if (this.mainmanager.getIsFocused("room")) {
      if (currentEvents.size < 1) {
        this.uiElements.eventsRoomName.textContent = focusedRoom.name;
      } else {
        this.uiElements.eventsRoomName.textContent =
          currentLocalization.events_in(focusedRoom.name);
      }
      this.uiElements.eventsRoomDescription.textContent =
        focusedRoom.description;
      this.uiElements.eventsBackButton.disabled = false;
      this.uiElements.eventsBackButton.title =
        currentLocalization.view_events_in(focusedFloor.name);
      this.uiElements.eventsMinimizedBackButton.disabled = false;
      this.uiElements.eventsMinimizedBackButton.title =
        currentLocalization.view_events_in(focusedFloor.name);
    } else {
      if (currentEvents.size < 1) {
        this.uiElements.eventsRoomName.textContent = focusedFloor.name;
      } else {
        this.uiElements.eventsRoomName.textContent =
          currentLocalization.events_in(focusedFloor.name);
      }
      this.uiElements.eventsRoomDescription.textContent =
        focusedFloor.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();
    currentEvents.forEach((event, id) => {
      const eventRoom = this.mainmanager
        .getAllFocusObject("room")
        .get(this.mainmanager.convertIdFocus(event.id, "room"));
      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("div");
      eventListContainer.classList.add("event-list-container");
      eventListContainer.id = "event-" + id;

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

      const eventListContainerSummaryName = document.createElement("a");
      eventListContainerSummaryName.href = "#" + id;
      eventListContainerSummaryName.textContent = event.name;

      eventListContainerSummary.appendChild(eventListContainerSummaryName);

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

      if (!this.mainmanager.getIsFocused("room")) {
        const eventListContainerSummaryRoom = document.createElement("a");
        eventListContainerSummaryRoom.href = "#" + eventRoom.id;
        eventListContainerSummaryRoom.textContent =
          currentLocalization.parenthesis(eventRoom.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.mainmanager.getCurrentLangCode(),
        {
          dateStyle: "short",
          timeStyle: "short",
        }
      );
      eventListContainerSummaryTime.textContent =
        currentLocalization.date_summary(
          datePrefix,
          getRelativeTime(
            eventDateStart,
            currentDate,
            this.mainmanager.getCurrentLangCode()
          )
        );

      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);

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

    if (currentEvents.size < 1) {
      this.uiElements.events.classList.add("empty");
    } else {
      this.uiElements.events.classList.remove("empty");
    }
  }

  __updateFloorsHard() {
    const currentLocalization = this.mainmanager.getCurrentLocalization();
    const currentFloors = this.mainmanager.getAllFocusObject("floor");
    const mainFocus = this.mainmanager.getCurrentFocus("floor");
    // Remove all children
    this.uiElements.floorButtons.replaceChildren();
    this.uiElements.floorsHeading.textContent =
      currentLocalization.floors_header;

    // Put them back
    currentFloors.forEach(({ name }, id) => {
      const floorButton = document.createElement("button");
      floorButton.textContent = name;
      floorButton.classList.add("floor-button");
      floorButton.id = "floor-" + id;
      if (id === mainFocus) floorButton.classList.add("selected");
      floorButton.addEventListener("click", () => {
        window.location.hash = id;
      });

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

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

  __updateFloorsSoft() {
    const currentLocalization = this.mainmanager.getCurrentLocalization();
    const currentFloors = this.mainmanager.getAllFocusObject("floor");
    const mainFocus = this.mainmanager.getCurrentFocus("floor");

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

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