import React, { useEffect, useRef, useState, useCallback } from "react";
import { Widget } from "../../../store/useWidgetStore";
import { MoveArrowLeft, MoveArrowRight } from "../../icons/SimulationIcons";
import { InfoIcon } from "../../icons/ExportCommonIcons";
import { useDroppedObjectsStore } from "../../../store/useDroppedObjectsStore";
import { getSelect2dZoneData } from "../../../services/realTimeVisulization/zoneData/getSelect2dZoneData";
import { getFloatingZoneData } from "../../../services/realTimeVisulization/zoneData/getFloatingData";

// Define the type for `Side`
type Side = "top" | "bottom" | "left" | "right";

interface DisplayZoneProps {
  zonesData: {
    [key: string]: {
      activeSides: Side[];
      panelOrder: Side[];

      lockedPanels: Side[];
      widgets: Widget[];
      zoneId: string;
      zoneViewPortTarget: number[];
      zoneViewPortPosition: number[];
    };
  };
  selectedZone: {
    zoneName: string;
    activeSides: Side[];
    panelOrder: Side[];

    lockedPanels: Side[];
    zoneId: string;
    zoneViewPortTarget: number[];
    zoneViewPortPosition: number[];
    widgets: {
      id: string;
      type: string;
      title: string;
      panel: Side;
      data: any;
    }[];
  };
  setSelectedZone: React.Dispatch<
    React.SetStateAction<{
      zoneName: string;
      activeSides: Side[];
      panelOrder: Side[];

      lockedPanels: Side[];
      zoneId: string;
      zoneViewPortTarget: number[];
      zoneViewPortPosition: number[];
      widgets: {
        id: string;
        type: string;
        title: string;
        panel: Side;
        data: any;
      }[];
    }>
  >;
}

const DisplayZone: React.FC<DisplayZoneProps> = ({
  zonesData,
  selectedZone,
  setSelectedZone,
}) => {

  // Ref for the container element
  const containerRef = useRef<HTMLDivElement | null>(null);

  // State to track overflow visibility
  const [showLeftArrow, setShowLeftArrow] = useState(false);
  const [showRightArrow, setShowRightArrow] = useState(false);

  // Function to calculate overflow state
  const updateOverflowState = useCallback(() => {
    const container = containerRef.current;

    if (container) {
      const isOverflowing = container.scrollWidth > container.clientWidth;
      const canScrollLeft = container.scrollLeft > 0;
      const canScrollRight =
        container.scrollLeft + container.clientWidth < container.scrollWidth;

      setShowLeftArrow(isOverflowing && canScrollLeft);
      setShowRightArrow(isOverflowing && canScrollRight);
    }
  }, []);

  useEffect(() => {
    const container = containerRef.current;

    if (container) {
      // Initial calculation after the DOM has been rendered
      const handleInitialRender = () => {
        requestAnimationFrame(updateOverflowState);
      };

      handleInitialRender();

      // Update on window resize or scroll
      const handleResize = () => updateOverflowState();
      const handleScroll = () => updateOverflowState();

      // Add mouse wheel listener for horizontal scrolling
      const handleWheel = (event: WheelEvent) => {
        event.preventDefault(); // Prevent default vertical scrolling
        if (container) {
          container.scrollBy({
            left: event.deltaY * 2, // Translate vertical scroll to horizontal scroll
            behavior: "smooth",
          });
        }
      };

      container.addEventListener("scroll", handleScroll);
      window.addEventListener("resize", handleResize);
      container.addEventListener("wheel", handleWheel, { passive: false });

      return () => {
        container.removeEventListener("scroll", handleScroll);
        window.removeEventListener("resize", handleResize);
        container.removeEventListener("wheel", handleWheel);
      };
    }
  }, [updateOverflowState]);

  // Handle scrolling with navigation arrows
  const handleScrollLeft = () => {
    const container = containerRef.current;
    if (container) {
      container.scrollBy({
        left: -200, // Scroll left by 200px
        behavior: "smooth",
      });
    }
  };

  const handleScrollRight = () => {
    const container = containerRef.current;
    if (container) {
      container.scrollBy({
        left: 200, // Scroll right by 200px
        behavior: "smooth",
      });
    }
  };

  async function handleSelect2dZoneData(zoneId: string, zoneName: string) {
    try {
      if (selectedZone?.zoneId === zoneId) {
        console.log("Zone is already selected:", zoneName);
        return;
      }
      const email = localStorage.getItem("email") || "";
      const organization = email?.split("@")[1]?.split(".")[0];
      // Fetch data from backend
      let response = await getSelect2dZoneData(zoneId, organization);
      let res = await getFloatingZoneData(zoneId, organization);
      // Set the selected zone in the store
      useDroppedObjectsStore.getState().setZone(zoneName, zoneId);
      if (Array.isArray(res)) {
        res.forEach((val) => {
          useDroppedObjectsStore.getState().addObject(zoneName, val);
        });
      }
      // Update selected zone state
      setSelectedZone({
        zoneName,
        activeSides: response.activeSides || [],
        panelOrder: response.panelOrder || [],
        lockedPanels: response.lockedPanels || [],
        widgets: response.widgets || [],
        zoneId: zoneId,
        zoneViewPortTarget: response.viewPortCenter || {},
        zoneViewPortPosition: response.viewPortposition || {},
      });
    } catch (error) {
      console.log('error: ', error);
      
    }
  }


  return (
    <div
      ref={containerRef}
      className={`zone-wrapper ${
        selectedZone?.activeSides?.includes("bottom") && "bottom"
      }`}
    >
      {/* Left Arrow */}
      {showLeftArrow && (
        <button className="arrow left-arrow" onClick={handleScrollLeft}>
          <MoveArrowLeft />
        </button>
      )}

      {/* Zones Wrapper */}
      {Object.keys(zonesData).length !== 0 ? (
        <div ref={containerRef} className="zones-wrapper">
          {Object.keys(zonesData).map((zoneName, index) => (
            <div
              key={index}
              className={`zone ${selectedZone.zoneName === zoneName ? "active" : ""
                }`}
              onClick={() => {
                handleSelect2dZoneData(zonesData[zoneName]?.zoneId, zoneName)
              }}
            >
              {zoneName}
            </div>
          ))}
        </div>
      ) : (
        <div className="no-zone">
          <InfoIcon />
          No zones? Create one!
        </div>
      )}

      {/* Right Arrow */}
      {showRightArrow && (
        <button className="arrow right-arrow" onClick={handleScrollRight}>
          <MoveArrowRight />
        </button>
      )}
    </div>
  );
};

export default DisplayZone;