import React, { useState, useEffect } from "react";
import { useRecoilValue } from "recoil";
import { selectedPoiState } from "../../store/atoms/poiState";
import { currentPoiState } from "../../store/atoms/currentPoiState";

const PoiUpdateModal = ({ onClose, poiData, onSubmit }) => {
  const currentPoi = useRecoilValue(currentPoiState);
  const selectedPoi = useRecoilValue(selectedPoiState);

  const [poiId, setPoiId] = useState(poiData ? poiData.idPoi : "");
  const [name, setName] = useState(poiData ? poiData.name : "");
  const [poiTypData, setPoiTypData] = useState([]);
  const [poiTypeId, setPoiTypeId] = useState("");
  const [locationDeviceData, setLocationDeviceData] = useState([]);
  const [deviceName, setDeviceName] = useState("");
  const [idLD, setIdLD] = useState(poiData ? poiData.idLD : "");
  const [description, setDescription] = useState(poiData ? poiData.description : "");

  // Fetch and set POI data
  useEffect(() => {
    if (poiData) {
      setPoiId(poiData.idPoi);
      setName(poiData.name);
      setPoiTypeId(poiData.idPoiTyp);
      setIdLD(poiData.idLD);
      setDescription(poiData.description);
    }
  }, [poiData]);

  // Fetch POI types and pre-select the current POI type
  useEffect(() => {
    const fetchPoiTypData = async () => {
      const cachedPoiTypData = localStorage.getItem("poiTypData");
      if (cachedPoiTypData) {
        const data = JSON.parse(cachedPoiTypData);
        setPoiTypData(data);
        if (poiData) {
          setPoiTypeId(poiData.idPoiTyp); // Set the selected POI type ID
        }
      } else {
        try {
          const response = await fetch("/api/talas_v5_DB/poiTyp/readPoiTyp");
          const data = await response.json();
          setPoiTypData(data);
          localStorage.setItem("poiTypData", JSON.stringify(data));
          if (poiData) {
            setPoiTypeId(poiData.idPoiTyp); // Set the selected POI type ID
          }
        } catch (error) {
          console.error("Fehler beim Abrufen der poiTyp Daten:", error);
        }
      }
    };
    fetchPoiTypData();
  }, [poiData]);

  // Fetch location devices and pre-select the current device
  useEffect(() => {
    const fetchLocationDevices = async () => {
      const cachedDeviceData = localStorage.getItem("locationDeviceData");
      if (cachedDeviceData) {
        const data = JSON.parse(cachedDeviceData);
        setLocationDeviceData(data);
        if (poiData) {
          const selectedDevice = data.find((device) => device.idLD === poiData.idLD);
          setDeviceName(selectedDevice ? selectedDevice.name : ""); // Pre-select the current device
        }
      } else {
        try {
          const response = await fetch("/api/talas_v5_DB/locationDevice/locationDevices");
          const data = await response.json();
          setLocationDeviceData(data);
          localStorage.setItem("locationDeviceData", JSON.stringify(data));
          if (poiData) {
            const selectedDevice = data.find((device) => device.idLD === poiData.idLD);
            setDeviceName(selectedDevice ? selectedDevice.name : ""); // Pre-select the current device
          }
        } catch (error) {
          console.error("Fehler beim Abrufen der Standort- und Gerätedaten:", error);
        }
      }
    };
    fetchLocationDevices();
  }, [poiData]);

  const handleDeletePoi = async () => {
    if (confirm("Sind Sie sicher, dass Sie diesen POI löschen möchten?")) {
      try {
        const response = await fetch(`/api/talas_v5_DB/pois/deletePoi?id=${poiId}`, {
          method: "DELETE",
        });
        if (response.ok) {
          onClose();
          window.location.reload();
        } else {
          throw new Error("Fehler beim Löschen des POI.");
        }
      } catch (error) {
        console.error("Fehler beim Löschen des POI:", error);
        alert("Fehler beim Löschen des POI.");
      }
    }
  };

  const handleSubmit = async (event) => {
    event.preventDefault();
    const idLDResponse = await fetch(`/api/talas_v5_DB/locationDevice/getDeviceId?deviceName=${encodeURIComponent(deviceName)}`);
    const idLDData = await idLDResponse.json();
    const idLD = idLDData.idLD;

    try {
      const response = await fetch("/api/talas_v5_DB/pois/updatePoi", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          idPoi: poiId,
          name: name,
          description: description,
          idPoiTyp: poiTypeId,
          idLD: idLD,
        }),
      });

      if (response.ok) {
        onClose();
        window.location.reload();
      } else {
        const errorResponse = await response.json();
        throw new Error(errorResponse.error || "Fehler beim Aktualisieren des POI.");
      }
    } catch (error) {
      console.error("Fehler beim Aktualisieren des POI:", error);
      alert("Fehler beim Aktualisieren des POI.");
    }
  };

  return (
    <div className="fixed inset-0 bg-black bg-opacity-10 flex justify-center items-center z-[1000]" onClick={onClose}>
      <div className="relative bg-white p-6 rounded-lg shadow-lg" onClick={(e) => e.stopPropagation()}>
        <button onClick={onClose} className="absolute top-0 right-0 mt-2 mr-2 p-1 text-gray-700 hover:text-gray-900 focus:outline-none focus:ring-2 focus:ring-gray-600" aria-label="Close">
          <svg xmlns="http://www.w3.org/2000/svg" className="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor">
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
          </svg>
        </button>
        <form onSubmit={handleSubmit} className="m-0 p-2 w-full">
          <div className="flex items-center mb-4">
            <label htmlFor="description" className="block mr-2 flex-none">
              Beschreibung:
            </label>
            <input type="text" id="description" name="description" value={description} onChange={(e) => setDescription(e.target.value)} placeholder="Beschreibung der Station" className="block p-2 w-full border-2 border-gray-200 rounded-md text-sm" />
          </div>

          <div className="flex items-center mb-4">
            <label htmlFor="deviceName" className="block mr-2 flex-none">
              Gerät:
            </label>
            <select id="deviceName" name="deviceName" value={deviceName} onChange={(e) => setDeviceName(e.target.value)} className="block p-2 w-full border-2 border-gray-200 rounded-md text-sm">
              {locationDeviceData.map((device) => (
                <option key={device.idLD} value={device.name}>
                  {device.name}
                </option>
              ))}
            </select>
          </div>

          <div className="flex items-center mb-4">
            <label htmlFor="idPoiTyp2" className="block mr-2 flex-none">
              Typ:
            </label>
            <select id="idPoiTyp2" name="idPoiTyp2" value={poiTypeId} onChange={(e) => setPoiTypeId(e.target.value)} className="block p-2 w-full border-2 border-gray-200 rounded-md text-sm">
              {poiTypData.map((poiTyp) => (
                <option key={poiTyp.idPoiTyp} value={poiTyp.idPoiTyp}>
                  {poiTyp.name}
                </option>
              ))}
            </select>
          </div>

          <button type="button" onClick={handleDeletePoi} className="bg-red-400 hover:bg-red-600 text-white font-bold py-2 px-4 rounded w-full mb-4">
            POI löschen
          </button>

          <button type="submit" className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded w-full">
            POI aktualisieren
          </button>
        </form>
      </div>
    </div>
  );
};

export default PoiUpdateModal;