"use client"; // app/dashboard/page.jsx
import React, { useEffect, useState } from "react";
import { useRouter } from "next/navigation";
import "tailwindcss/tailwind.css";
import "@fontsource/roboto";
import "bootstrap-icons/font/bootstrap-icons.css";
import CPLStatus from "../components/modulesStatus/CPLStatus";
import Access1Status from "../components/modulesStatus/Access1Status";
import Access2Status from "../components/modulesStatus/Access2Status";
import KabelModulStatus from "../components/modulesStatus/KabelModulStatus";
import XioPM1Status from "../components/modulesStatus/XioPM1Status";
import XioPM2Status from "../components/modulesStatus/XioPM2Status";
import { Icon } from "@iconify/react";

function Dashboard() {
  const [last20Messages, setLast20Messages] = useState([]);
  const [kueOnline, setkueOnline] = useState([]);
  const [kueVersion, setKueVersion] = useState([]);
  const [ip, setIp] = useState("");
  const [subnet, setSubnet] = useState("");
  const [gateway, setGateway] = useState("");
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState(null);
  const [kueCableBreak, setKueCableBreak] = useState([]);
  const [appVersion, setAppVersion] = useState("");
  const [kueAlarm1, setKueAlarm1] = useState([]);
  const [kueAlarm2, setKueAlarm2] = useState([]);
  const [kueGroundFault, setKueGroundFault] = useState([]);
  const router = useRouter();

  const parseMessages = (messages) => {
    messages = messages
      .replace(/<tr>/g, "\n")
      .replace(/<\/?td>/g, "")
      .replace(/<\/tr>/g, "")
      .trim();
    const rows = messages.split("\n");
    return rows.map((row) => [
      row.substring(0, 5),
      row.substring(5, 10),
      row.substring(10, 29),
      row.substring(33, row.length - 1),
      row.substring(row.length - 1),
    ]);
  };
  //------------------------------------------------------------------
  //---------  Direkte Implementierung von `getFromIndexedDB` , um Importprobleme zu vermeiden in Produktionsumgebung -----
  async function getFromIndexedDB(key) {
    return new Promise((resolve, reject) => {
      const request = indexedDB.open("CPLDatabase", 1);
      request.onsuccess = () => {
        const db = request.result;
        const transaction = db.transaction("cplVariables", "readonly");
        const store = transaction.objectStore("cplVariables");
        const getRequest = store.get(key);
        getRequest.onsuccess = () => resolve(getRequest.result);
        getRequest.onerror = () => reject(getRequest.error);
      };
      request.onerror = () => reject(request.error);
    });
  }
  //------------------------------------------------------------------
  useEffect(() => {
    const loadDataOnce = async () => {
      try {
        // Daten aus IndexedDB laden
        const last20MessagesData = await getFromIndexedDB("last20Messages");
        const ipData = await getFromIndexedDB("ip");
        const subnetData = await getFromIndexedDB("subnet");
        const gatewayData = await getFromIndexedDB("gateway");
        const appVersionData = await getFromIndexedDB("appVersion");
        const kueCableBreakData = await getFromIndexedDB("kueCableBreak");
        const kueOnlineData = await getFromIndexedDB("kueOnline");
        const kueVersionData = await getFromIndexedDB("kueVersion");
        const kueAlarm1Data = await getFromIndexedDB("kueAlarm1");
        const kueAlarm2Data = await getFromIndexedDB("kueAlarm2");
        const kueGroundFaultData = await getFromIndexedDB("kueGroundFault");

        // Setze die States mit den geladenen Daten
        setLast20Messages(parseMessages(last20MessagesData || ""));
        setIp(ipData || "");
        setSubnet(subnetData || "");
        setGateway(gatewayData || "");
        setAppVersion(appVersionData || "");
        setKueCableBreak(
          Array.isArray(kueCableBreakData) ? kueCableBreakData.map(Number) : []
        );
        setkueOnline(
          Array.isArray(kueOnlineData) ? kueOnlineData.map(Number) : []
        );
        setKueVersion(Array.isArray(kueVersionData) ? kueVersionData : []);
        setKueAlarm1(
          Array.isArray(kueAlarm1Data) ? kueAlarm1Data.map(Number) : []
        );
        setKueAlarm2(
          Array.isArray(kueAlarm2Data) ? kueAlarm2Data.map(Number) : []
        );
        setKueGroundFault(
          Array.isArray(kueGroundFaultData)
            ? kueGroundFaultData.map(Number)
            : []
        );
        setLoading(false);
      } catch (error) {
        console.error("Fehler beim Laden der Daten aus IndexedDB:", error);
        setError(error);
        setLoading(false);
      }
    };

    loadDataOnce();

    const intervalId = setInterval(loadDataOnce, 10000);
    return () => clearInterval(intervalId);
  }, []);
  //------------------------------------------------------------------
  const handleModuleClick = (rackNumber) => {
    router.push(`/kabelueberwachung?rack=${rackNumber}`);
  };

  const renderBaugruppentraeger = () => {
    const baugruppen = [];
    const numBaugruppen = Math.ceil(kueOnline.length / 8);

    for (let i = 0; i < numBaugruppen; i++) {
      const slots = kueOnline.slice(i * 8, (i + 1) * 8);

      baugruppen.push(
        <div key={i} className="flex bg-white shadow-md rounded-lg mb-4">
          <div className="flex gap-1">
            {slots.map((version, index) => {
              const slotNumber = i * 8 + index + 1;
              const isSlotOnline = kueOnline[slotNumber - 1] === 1;
              const moduleVersion = kueVersion[slotNumber - 1] || version; // Verwende kueVersion

              return (
                <div
                  key={slotNumber}
                  className="cursor-pointer"
                  onClick={() => handleModuleClick(i + 1)}
                >
                  <KabelModulStatus
                    slot={slotNumber}
                    isOnline={isSlotOnline}
                    moduleVersion={moduleVersion}
                    kueCableBreak={kueCableBreak}
                    kueAlarm1={kueAlarm1}
                    kueAlarm2={kueAlarm2}
                    kueGroundFault={kueGroundFault}
                  />
                </div>
              );
            })}
          </div>
        </div>
      );
    }

    return baugruppen;
  };

  return (
    <div className="flex flex-col p-4">
      <div className="flex justify-between items-center w-full lg:w-2/3">
        <div className="flex justify-between gap-1">
          <Icon
            icon="ri:calendar-schedule-line"
            className="text-littwin-blue text-4xl"
          />
          <h1 className="text-xl font-bold text-gray-700">
            Letzten 20 Meldungen
          </h1>
        </div>
      </div>

      <div className="flex flex-col lg:flex-row gap-1 overflow-hidden">
        <div className="bg-white shadow-md rounded-lg w-full lg:w-2/3 overflow-auto flex flex-grow">
          <table className="min-w-full border border-gray-200 text-left">
            <thead className="bg-gray-100 border-b border-gray-300">
              <tr>
                <th className="py-1 px-4 text-gray-700 text-sm font-medium">
                  ID
                </th>
                <th className="py-1 px-4 text-gray-700 text-sm font-medium">
                  Modul
                </th>
                <th className="py-1 px-4 text-gray-700 text-sm font-medium">
                  Zeitstempel
                </th>
                <th className="py-1 px-4 text-gray-700 text-sm font-medium w-2/3">
                  Meldung
                </th>
                <th className="py-1 px-4 text-gray-700 text-sm font-medium">
                  Status
                </th>
              </tr>
            </thead>
            <tbody className="text-xs text-gray-600 flex-shrink-0">
              {last20Messages.length > 0 ? (
                last20Messages.map((columns, index) => (
                  <tr
                    key={index}
                    className="border-b border-gray-200 hover:bg-gray-50"
                  >
                    <td className="px-4 w-1/7">{columns[0]}</td>
                    <td className="px-4 w-1/7">{columns[1]}</td>
                    <td className="px-4 w-3/7 whitespace-nowrap">
                      <div className="flex flex-row space-x-2">
                        <span>{columns[2].split(" ")[0]}</span>
                        <span>{columns[2].split(" ")[1]}</span>
                      </div>
                    </td>
                    <td className="px-4 w-2/7">{columns[3]}</td>
                    <td className="px-4 w-1/7">{columns[4]}</td>
                  </tr>
                ))
              ) : (
                <tr>
                  <td className="px-4 text-center" colSpan="5">
                    Keine Meldungen verfügbar.
                  </td>
                </tr>
              )}
            </tbody>
          </table>
        </div>

        <div className="shadow-md rounded-lg lg:w-1/3 flex flex-col gap-2">
          <div className="bg-gray-50 p-4 rounded-lg shadow-sm border border-gray-200">
            <h2 className="text-lg font-semibold text-gray-700 mb-2">
              Versionsinformationen
            </h2>
            <div className="flex flex-row p-2 space-x-2">
              <Icon icon="bx:code-block" className="text-xl text-blue-400" />
              <p className="text-sm text-gray-600">
                <span className="font-bold"></span> Applikationsversion:{" "}
                {appVersion}{" "}
              </p>
            </div>
            <div className="flex flex-row p-2 space-x-2">
              <Icon icon="mdi:web" className="text-xl text-blue-400" />
              <p className="text-sm text-gray-600">
                <span className="font-bold"> </span>Webserverversion: 1.0.0
              </p>
            </div>
          </div>
          <div className="bg-gray-50 rounded-lg shadow-sm border border-gray-200 justify-between space-y-1">
            <div className="flex flex-row item-center justify-between p-1">
              <CPLStatus />
            </div>
            <div className="flex flex-col item-center justify-between gap-1">
              <div className="flex flex-row item-center justify-between space-y-0">
                <div className="flex flex-col gap-1 mt-2">
                  {loading ? (
                    <p>Lädt...</p>
                  ) : error ? (
                    <p className="text-red-500">{error.toString()}</p>
                  ) : (
                    renderBaugruppentraeger()
                  )}
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>

      <div className="flex-shrink-0 flex justify-between items-center mt-2 bg-white p-4 rounded-lg shadow-md border border-gray-200">
        <div className="flex items-center space-x-4">
          <img src="/images/IP-icon.svg" alt="IP Address" className="w-6 h-6" />
          <div>
            <p className="text-xs text-gray-500">IP-Adresse</p>
            <p className="text-sm font-medium text-gray-700">{ip}</p>
          </div>
        </div>
        <div className="flex items-center space-x-4">
          <img
            src="/images/subnet-mask.svg"
            alt="subnet mask"
            className="w-6 h-6"
          />
          <div>
            <p className="text-xs text-gray-500">Subnet-Maske</p>
            <p className="text-sm font-medium text-gray-700">{subnet}</p>
          </div>
        </div>
        <div className="flex items-center space-x-4">
          <img src="/images/gateway.svg" alt="gateway" className="w-6 h-6" />
          <div>
            <p className="text-xs text-gray-500">Gateway</p>
            <p className="text-sm font-medium text-gray-700">{gateway}</p>
          </div>
        </div>
      </div>
    </div>
  );
}

export default Dashboard;