// components/main/kabelueberwachung/kue705FO/Charts/LoopMeasurementChart/LoopMeasurementChart.tsx
import React, { useEffect, useRef } from "react";
import { useSelector } from "react-redux";
import Chart from "chart.js/auto";
import "chartjs-adapter-moment";

const LoopMeasurementChart = () => {
  const chartRef = useRef<HTMLCanvasElement>(null);
  const chartInstance = useRef<Chart | null>(null);

  // Daten aus dem Redux-Store abrufen
  const chartData =
    useSelector(
      (state: { chartData: { data: any[] } }) => state.chartData.data
    ) ?? [];

  // Ermittlung des ausgewählten Modus (DIA0, DIA1, DIA2)
  const selectedMode = useSelector(
    (state: { chartMode: { mode: "DIA0" | "DIA1" | "DIA2" } }) =>
      state.chartMode?.mode ?? "DIA0"
  );

  useEffect(() => {
    if (chartRef.current) {
      if (chartInstance.current) {
        chartInstance.current.destroy();
      }

      // Datenvorbereitung: Konvertieren der Zeitstempel in Millisekunden
      const processedData = chartData.map((entry) => ({
        ...entry,
        timestampMs: new Date(entry.t).getTime(),
      }));

      const datasets = [
        {
          label: "Messwert Minimum (kOhm)",
          data: processedData.map((entry) => ({
            x: entry.timestampMs,
            y: entry.i,
          })),
          borderColor: "rgba(75, 192, 192, 1)",
          backgroundColor: "rgba(75, 192, 192, 0.2)",
          fill: true,
        },
        {
          label: "Messwert Maximum (kOhm)",
          data: processedData.map((entry) => ({
            x: entry.timestampMs,
            y: entry.a,
          })),
          borderColor: "rgba(192, 75, 75, 1)",
          backgroundColor: "rgba(192, 75, 75, 0.2)",
          fill: true,
        },
        {
          label:
            selectedMode === "DIA0"
              ? "Messwert Mittelwert (m)"
              : "Messwert Durchschnitt (g)",
          data: processedData.map((entry) => ({
            x: entry.timestampMs,
            y: selectedMode === "DIA0" ? entry.m : entry.g,
          })),
          borderColor: "rgba(75, 75, 192, 1)",
          backgroundColor: "rgba(75, 75, 192, 0.2)",
          fill: true,
        },
      ];

      const ctx = chartRef.current.getContext("2d");
      if (ctx) {
        chartInstance.current = new Chart(ctx, {
          type: "line",
          data: { datasets },
          options: {
            responsive: true,
            maintainAspectRatio: false,
            scales: {
              x: {
                type: "time",
                time: {
                  unit: "day",
                  tooltipFormat: "dd.MM.yyyy HH:mm",
                  displayFormats: { day: "dd.MM.yyyy" },
                },
                title: { display: true, text: "Zeit" },
              },
              y: {
                title: { display: true, text: "kOhm" },
                min: 0,
                max: 80,
              },
            },
          },
        });
      }
    }
  }, [chartData, selectedMode]);

  return (
    <div style={{ position: "relative", width: "100%", height: "400px" }}>
      <canvas ref={chartRef} />
    </div>
  );
};

export default LoopMeasurementChart;