const allData = {
    jual: [
        { x: new Date('2025-12-13'), y: 2469965 },
    { x: new Date('2025-12-15'), y: 2482599 },
    { x: new Date('2025-12-16'), y: 2479232 },
    { x: new Date('2025-12-17'), y: 2465180 },
    { x: new Date('2025-12-18'), y: 2480810 },
    { x: new Date('2025-12-19'), y: 2492211 },
    { x: new Date('2025-12-20'), y: 2476005 },
    { x: new Date('2025-12-22'), y: 2488670 },
    { x: new Date('2025-12-23'), y: 2556815 },
    { x: new Date('2025-12-24'), y: 2583403 },
    { x: new Date('2025-12-25'), y: 2543961 },
    { x: new Date('2025-12-26'), y: 2560231 },
    { x: new Date('2025-12-29'), y: 2558043 },
    { x: new Date('2025-12-30'), y: 2475524 },
    { x: new Date('2025-12-31'), y: 2488528 },
    { x: new Date('2026-01-02'), y: 2486634 },
    { x: new Date('2026-01-03'), y: 2475026 },
    { x: new Date('2026-01-04'), y: 2475026 },
    { x: new Date('2026-01-05'), y: 2512129 },
    { x: new Date('2026-01-06'), y: 2512129 },
    { x: new Date('2026-01-07'), y: 2528589 },
    { x: new Date('2026-01-08'), y: 2532894 },
    { x: new Date('2026-01-09'), y: 2517686 },
    { x: new Date('2026-01-10'), y: 2523079 },
    { x: new Date('2026-01-11'), y: 2407594 },
    { x: new Date('2026-01-13'), y: 2590784 },
    { x: new Date('2026-01-14'), y: 2595386 },
    { x: new Date('2026-01-15'), y: 2614979 },
    { x: new Date('2026-01-16'), y: 2602334 },
    { x: new Date('2026-01-17'), y: 2588954 },
    { x: new Date('2026-01-19'), y: 2602334 },
    { x: new Date('2026-01-20'), y: 2644640 },
    { x: new Date('2026-01-21'), y: 2659988 },
    { x: new Date('2026-01-22'), y: 2701484 },
    { x: new Date('2026-01-23'), y: 2739384 },
    { x: new Date('2026-01-24'), y: 2811292 },
    { x: new Date('2026-01-26'), y: 2812730 },
    { x: new Date('2026-01-27'), y: 2854000 },
    { x: new Date('2026-01-28'), y: 2900237 },
    { x: new Date('2026-01-29'), y: 3026549 },
    { x: new Date('2026-01-30'), y: 2952692 },
    { x: new Date('2026-01-31'), y: 2746832 },
    { x: new Date('2026-02-02'), y: 2680802 },
    { x: new Date('2026-02-03'), y: 2625360 },
    { x: new Date('2026-02-04'), y: 2731164 },
    { x: new Date('2026-02-05'), y: 2704731 },
    { x: new Date('2026-02-06'), y: 2610297 },
    { x: new Date('2026-02-07'), y: 2757161 },
    { x: new Date('2026-02-09'), y: 2790820 },
    { x: new Date('2026-02-10'), y: 2813018 },
    { x: new Date('2026-02-11'), y: 2797756 }    ],
    beli: [
        { x: new Date('2025-12-13'), y: 2583673 },
    { x: new Date('2025-12-15'), y: 2571039 },
    { x: new Date('2025-12-16'), y: 2567552 },
    { x: new Date('2025-12-17'), y: 2553000 },
    { x: new Date('2025-12-18'), y: 2569186 },
    { x: new Date('2025-12-19'), y: 2580993 },
    { x: new Date('2025-12-20'), y: 2589991 },
    { x: new Date('2025-12-22'), y: 2577326 },
    { x: new Date('2025-12-23'), y: 2671320 },
    { x: new Date('2025-12-24'), y: 2675433 },
    { x: new Date('2025-12-25'), y: 2735384 },
    { x: new Date('2025-12-26'), y: 2733459 },
    { x: new Date('2025-12-29'), y: 2702715 },
    { x: new Date('2025-12-30'), y: 2624970 },
    { x: new Date('2025-12-31'), y: 2655716 },
    { x: new Date('2026-01-02'), y: 2627268 },
    { x: new Date('2026-01-03'), y: 2641308 },
    { x: new Date('2026-01-04'), y: 2641308 },
    { x: new Date('2026-01-05'), y: 2654205 },
    { x: new Date('2026-01-06'), y: 2663504 },
    { x: new Date('2026-01-07'), y: 2698116 },
    { x: new Date('2026-01-08'), y: 2676144 },
    { x: new Date('2026-01-09'), y: 2660076 },
    { x: new Date('2026-01-10'), y: 2692589 },
    { x: new Date('2026-01-11'), y: 2779678 },
    { x: new Date('2026-01-13'), y: 2737308 },
    { x: new Date('2026-01-14'), y: 2742170 },
    { x: new Date('2026-01-15'), y: 2763423 },
    { x: new Date('2026-01-16'), y: 2749510 },
    { x: new Date('2026-01-17'), y: 2762890 },
    { x: new Date('2026-01-19'), y: 2749510 },
    { x: new Date('2026-01-20'), y: 2794210 },
    { x: new Date('2026-01-21'), y: 2810426 },
    { x: new Date('2026-01-22'), y: 2868588 },
    { x: new Date('2026-01-23'), y: 2896630 },
    { x: new Date('2026-01-24'), y: 2914355 },
    { x: new Date('2026-01-26'), y: 2915852 },
    { x: new Date('2026-01-27'), y: 2958628 },
    { x: new Date('2026-01-28'), y: 3001753 },
    { x: new Date('2026-01-29'), y: 3205336 },
    { x: new Date('2026-01-30'), y: 3165186 },
    { x: new Date('2026-01-31'), y: 3035191 },
    { x: new Date('2026-02-02'), y: 3012937 },
    { x: new Date('2026-02-03'), y: 2853411 },
    { x: new Date('2026-02-04'), y: 3030494 },
    { x: new Date('2026-02-05'), y: 3057247 },
    { x: new Date('2026-02-06'), y: 2969972 },
    { x: new Date('2026-02-07'), y: 2916558 },
    { x: new Date('2026-02-09'), y: 2920761 },
    { x: new Date('2026-02-10'), y: 2956487 },
    { x: new Date('2026-02-11'), y: 2945983 }    ]
};

  const chartOptions = {
    chart: {
      type: 'area',
      height: '300',
      zoom: { enabled: false },
      toolbar: { show: false },
      offsetX: 0
    },
    colors: ['#008FFB', '#DFBD69'],
    dataLabels: { enabled: false },
    stroke: { curve: 'smooth', width: 2 },
    series: [],
    xaxis: {
      type: 'datetime',
      labels: { datetimeUTC: false },
      min: undefined,
      max: undefined
    },
    yaxis: {
      tickAmount: 4,
      labels: {
        style: { fontSize: '12px' },
        offsetX: -15,
        formatter: function (value) {
          const text = value.toLocaleString('id-ID');
          return text.length > 5 ? text.slice(0, 5) + '…' : text;
        }
      }
    },
    grid: {
      padding: {
        left: -10,
        right: 0
      }
    },
    tooltip: {
      x: { format: 'dd MMM yyyy' },
      y: {
        formatter: value => new Intl.NumberFormat('id-ID', {
          style: 'currency',
          currency: 'IDR',
          maximumFractionDigits: 0
        }).format(value)
      }
    },
    fill: {
      type: 'gradient',
      gradient: {
        shadeIntensity: 1,
        opacityFrom: 0.4,
        opacityTo: 0.05,
        stops: [0, 90, 100]
      }
    },
    legend: {
      position: 'top',
      horizontalAlign: 'right'
    }
  };

  const chart = new ApexCharts(document.querySelector("#chart"), chartOptions);
  chart.render();

  function padIfTooFew(data, cutoff, now) {
    if (data.length === 1) {
      return [
        { x: cutoff.getTime(), y: null },
        ...data,
        { x: now.getTime(), y: null }
      ];
    }
    return data;
  }

  function filterData(months) {
    const now = new Date();
    let cutoff;

    if (months === 'all') {
      cutoff = new Date('2000-01-01');
    } else {
      cutoff = new Date();
      cutoff.setMonth(cutoff.getMonth() - parseInt(months));
    }

    let filteredJual = allData.jual.filter(d => d.x >= cutoff.getTime());
    let filteredBeli = allData.beli.filter(d => d.x >= cutoff.getTime());

    filteredJual = padIfTooFew(filteredJual, cutoff, now);
    filteredBeli = padIfTooFew(filteredBeli, cutoff, now);

    chart.updateSeries([
      { name: 'Jual', data: filteredJual },
      { name: 'Beli', data: filteredBeli }
    ]);

    chart.updateOptions({
      xaxis: {
        min: cutoff.getTime(),
        max: now.getTime()
      }
    });
  }

  document.querySelectorAll(".filter-btn").forEach(btn => {
    btn.addEventListener("click", function () {
      document.querySelectorAll(".filter-btn").forEach(b => b.classList.remove("active"));
      this.classList.add("active");
      const months = this.getAttribute("data-months");
      if (months) {
        filterData(months);
      }
    });
  });

  // Initial load (1 Bulan)
  filterData('1');