import React, { useEffect, useState } from "react";
import { useRecoilValue } from "recoil";
import { gisStationsStaticDistrictState } from "../features/gisStationState";

function DataSheet() {
  // useState für uniqueAreas und stationListing
  const [uniqueAreas, setUniqueAreas] = useState([]);
  const [stationListing, setStationListing] = useState([]);
  const GisStationsStaticDistrict = useRecoilValue(
    gisStationsStaticDistrictState
  );

  useEffect(() => {
    console.log(
      "GisStationsStaticDistrict in DataSheet:",
      GisStationsStaticDistrict
    );

    const seenNames = new Set();
    const filteredAreas = GisStationsStaticDistrict.filter((item) => {
      const isUnique = !seenNames.has(item.Area_Name);
      if (isUnique) {
        seenNames.add(item.Area_Name);
      }
      return isUnique;
    });

    setUniqueAreas(filteredAreas);

    // Erzeugen von stationListing aus uniqueAreas und alphabetisches Sortieren
    const newStationListing = filteredAreas
      .map((area, index) => ({
        id: index + 1, // Zuweisung einer eindeutigen ID
        name: area.Area_Name,
      }))
      .sort((a, b) => a.name.localeCompare(b.name)); // Alphabetisches Sortieren der Namen

    setStationListing(newStationListing);
  }, [GisStationsStaticDistrict]);

  const [checkedStations, setCheckedStations] = useState({});

  const handleCheckboxChange = (id) => {
    setCheckedStations((prev) => ({
      ...prev,
      [id]: !prev[id],
    }));
  };

  const handleStationChange = (event) => {
    console.log("Station selected:", event.target.value);
  };

  const resetView = () => {
    console.log("View has been reset");
  };

  return (
    <div
      id="mainDataSheet"
      className="absolute top-3 right-3 w-1/6 min-w-[300px] z-10 bg-white p-2 rounded-lg shadow-lg"
    >
      <div className="flex flex-col gap-4 p-4">
        <div className="flex items-center justify-between">
          {/* Dropdown */}
          <select
            onChange={handleStationChange}
            id="stationListing"
            className="border-solid-1 p-2 rounded ml-1"
          >
            <option>Station wählen</option>
            {stationListing.map((station) => (
              <option key={station.id} value={station.id}>
                {station.name}
              </option>
            ))}
          </select>
          {/* Icon */}
          <img
            src="/img/expand-icon.svg"
            alt="Expand"
            className="h-6 w-6 ml-2"
          />
        </div>

        {/* Liste der Stationen mit Checkboxen */}
        {stationListing.map((station) => (
          <div key={station.id} className="flex items-center">
            <input
              type="checkbox"
              id={`box-${station.id}`}
              className="accent-blue-500 checked:bg-blue-500"
              checked={checkedStations[station.id] || false}
              onChange={() => handleCheckboxChange(station.id)}
            />
            <label
              htmlFor={`box-${station.id}`}
              className="text-sm font-bold ml-2"
            >
              {station.name}
            </label>
          </div>
        ))}
      </div>
    </div>
  );
}

export default DataSheet;