// /components/pois/PoiUpdateModal.js
import React, { useState, useEffect } from "react";
import Select from "react-select";
import { useSelector, useDispatch } from "react-redux";
import { fetchLocationDevicesThunk } from "../../redux/thunks/database/fetchLocationDevicesThunk";
import { fetchPoiTypThunk } from "../../redux/thunks/database/fetchPoiTypThunk";
import { selectMapLayersState } from "../../redux/slices/mapLayersSlice";
import { selectPoiTypData, selectPoiTypStatus } from "../../redux/slices/database/poiTypSlice";
import { deletePoiThunk } from "../../redux/thunks/database/deletePoiThunk";
import { updatePoiThunk } from "../../redux/thunks/database/updatePoiThunk";

const PoiUpdateModal = ({ onClose, poiData }) => {
  const dispatch = useDispatch();
  const mapLayersVisibility = useSelector(selectMapLayersState);
  const poiTypData = useSelector(selectPoiTypData);
  const poiTypStatus = useSelector(selectPoiTypStatus);
  const devices = useSelector((state) => state.locationDevicesFromDB.devices);

  const [poiId, setPoiId] = useState(poiData?.idPoi || "");
  const [name, setName] = useState(poiData?.name || "");
  const [description, setDescription] = useState(poiData?.description || "");
  const [deviceName, setDeviceName] = useState(null);
  const [poiTypeId, setPoiTypeId] = useState(null);

  const systemNameToIdMap = {
    TALAS: 1,
    ECI: 2,
    ULAF: 3,
    GSMModem: 5,
    CiscoRouter: 6,
    WAGO: 7,
    Siemens: 8,
    OTDR: 9,
    WDM: 10,
    GMA: 11,
    Messdatensammler: 12,
    Messstellen: 13,
    TALASICL: 100,
    DAUZ: 110,
    SMSFunkmodem: 111,
    Basisgerät: 200,
  };

  useEffect(() => {
    dispatch(fetchLocationDevicesThunk());
    if (poiTypStatus === "idle") {
      dispatch(fetchPoiTypThunk());
    }
  }, [dispatch, poiTypStatus]);

  useEffect(() => {
    if (poiData && devices.length > 0) {
      const selectedDevice = devices.find((device) => device.idLD === poiData.idLD);
      if (selectedDevice) {
        setDeviceName({ value: selectedDevice.idLD, label: selectedDevice.name });
      }
    }
  }, [poiData, devices]);

  useEffect(() => {
    if (poiData && poiTypData.length > 0) {
      const selectedTyp = poiTypData.find((typ) => typ.idPoiTyp === poiData.idPoiTyp);
      if (selectedTyp) {
        setPoiTypeId({ value: selectedTyp.idPoiTyp, label: selectedTyp.name });
      }
    }
  }, [poiData, poiTypData]);

  const filterDevices = () => {
    const activeSystems = Object.keys(mapLayersVisibility).filter((system) => mapLayersVisibility[system]);
    const activeSystemIds = activeSystems.map((system) => systemNameToIdMap[system]).filter((id) => id !== undefined);
    return devices.filter((device) => activeSystemIds.includes(device.idsystem_typ));
  };

  const handleSubmit = async (event) => {
    event.preventDefault();
    try {
      await dispatch(
        updatePoiThunk({
          idPoi: poiId,
          name,
          description,
          idPoiTyp: poiTypeId?.value ?? poiData?.idPoiTyp,
          idLD: deviceName?.value,
        })
      ).unwrap();
      onClose();
      window.location.reload();
    } catch (error) {
      console.error("Fehler beim Aktualisieren des POI:", error);
      alert("Fehler beim Aktualisieren des POI.");
    }
  };

  const handleDeletePoi = async () => {
    if (confirm("Sind Sie sicher, dass Sie diesen POI löschen möchten?")) {
      try {
        await dispatch(deletePoiThunk(poiId)).unwrap();
        onClose();
        window.location.reload();
      } catch (error) {
        console.error("Fehler beim Löschen des POI:", error);
        alert("Fehler beim Löschen des POI.");
      }
    }
  };

  const poiTypeOptions = Array.isArray(poiTypData)
    ? poiTypData.map((poiTyp) => ({
        value: poiTyp.idPoiTyp,
        label: poiTyp.name,
      }))
    : [];

  const deviceOptions = filterDevices().map((device) => ({
    value: device.idLD,
    label: device.name,
  }));

  const customStyles = {
    control: (provided) => ({
      ...provided,
      width: "100%",
      minWidth: "300px",
      maxWidth: "100%",
    }),
    menu: (provided) => ({
      ...provided,
      width: "100%",
      minWidth: "300px",
    }),
  };

  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 flex-col mb-4">
            <label htmlFor="description" className="block mb-2 font-bold text-sm text-gray-700">
              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 flex-col mb-4">
            <label htmlFor="deviceName" className="block mb-2 font-bold text-sm text-gray-700">
              Gerät:
            </label>
            <Select id="deviceName" value={deviceName} onChange={setDeviceName} options={deviceOptions} placeholder="Gerät auswählen..." isClearable={true} styles={customStyles} />
          </div>

          <div className="flex flex-col mb-4">
            <label htmlFor="idPoiTyp" className="block mb-2 font-bold text-sm text-gray-700">
              Typ:
            </label>
            <Select id="idPoiTyp" value={poiTypeId} onChange={setPoiTypeId} options={poiTypeOptions} placeholder="Typ auswählen..." isClearable={true} styles={customStyles} />
          </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;