const fullData = [
    { x: new Date('2025-04-09'), y: 55269.64 },
    { x: new Date('2025-04-10'), y: 55131.74 },
    { x: new Date('2025-04-11'), y: 55147.15 },
    { x: new Date('2025-04-12'), y: 54995.79 },
    { x: new Date('2025-04-13'), y: 55120.35 },
    { x: new Date('2025-04-14'), y: 55031.42 },
    { x: new Date('2025-04-15'), y: 55187.19 },
    { x: new Date('2025-04-16'), y: 55245.52 },
    { x: new Date('2025-04-17'), y: 55105.15 },
    { x: new Date('2025-04-18'), y: 55208.08 },
    { x: new Date('2025-04-19'), y: 55192.89 },
    { x: new Date('2025-04-20'), y: 55257.80 },
    { x: new Date('2025-04-21'), y: 55151.79 },
    { x: new Date('2025-04-22'), y: 55099.75 },
    { x: new Date('2025-04-23'), y: 55269.29 },
    { x: new Date('2025-04-24'), y: 55345.94 },
    { x: new Date('2025-04-26'), y: 55299.14 },
    { x: new Date('2025-04-27'), y: 55327.72 },
    { x: new Date('2025-04-28'), y: 55256.42 },
    { x: new Date('2025-05-02'), y: 54638.74 },
    { x: new Date('2025-05-05'), y: 53279.41 },
    { x: new Date('2025-05-06'), y: 53279.41 },
    { x: new Date('2025-05-08'), y: 53241.06 },
    { x: new Date('2025-05-09'), y: 53451.54 },
    { x: new Date('2025-05-10'), y: 53457.28 },
    { x: new Date('2025-05-11'), y: 53300.92 },
    { x: new Date('2025-05-12'), y: 53395.96 },
    { x: new Date('2025-05-13'), y: 53565.10 },
    { x: new Date('2025-05-14'), y: 53719.40 },
    { x: new Date('2025-05-15'), y: 53322.82 },
    { x: new Date('2025-05-16'), y: 53281.25 },
    { x: new Date('2025-05-17'), y: 53463.84 },
    { x: new Date('2025-05-19'), y: 53285.00 },
    { x: new Date('2025-05-20'), y: 53185.24 },
    { x: new Date('2025-05-21'), y: 53215.98 },
    { x: new Date('2025-05-22'), y: 53063.24 },
    { x: new Date('2025-05-24'), y: 53069.32 },
    { x: new Date('2025-05-26'), y: 52881.02 },
    { x: new Date('2025-05-27'), y: 52928.60 },
    { x: new Date('2025-06-04'), y: 53052.14 },
    { x: new Date('2025-06-05'), y: 53048.18 },
    { x: new Date('2025-06-06'), y: 53114.47 },
    { x: new Date('2025-06-07'), y: 52843.21 },
    { x: new Date('2025-06-08'), y: 52845.61 },
    { x: new Date('2025-06-10'), y: 53146.97 },
    { x: new Date('2025-06-11'), y: 53032.55 },
    { x: new Date('2025-06-12'), y: 53005.95 },
    { x: new Date('2025-06-13'), y: 52956.55 },
    { x: new Date('2025-06-14'), y: 53142.53 },
    { x: new Date('2025-06-15'), y: 53017.02 },
    { x: new Date('2025-06-16'), y: 53056.87 },
    { x: new Date('2025-06-17'), y: 53013.05 },
    { x: new Date('2025-06-18'), y: 53098.41 },
    { x: new Date('2025-06-20'), y: 53151.17 },
    { x: new Date('2025-06-21'), y: 53216.88 },
    { x: new Date('2025-06-22'), y: 53101.63 },
    { x: new Date('2025-06-23'), y: 53225.74 },
    { x: new Date('2025-06-24'), y: 53589.17 },
    { x: new Date('2025-06-25'), y: 53415.08 },
    { x: new Date('2025-06-26'), y: 53325.71 },
    { x: new Date('2025-06-27'), y: 52976.20 },
    { x: new Date('2025-06-28'), y: 53039.85 },
    { x: new Date('2025-06-29'), y: 53004.30 },
    { x: new Date('2025-06-30'), y: 52918.91 },
    { x: new Date('2025-07-01'), y: 53177.55 },
    { x: new Date('2025-07-02'), y: 52948.74 },
    { x: new Date('2025-07-04'), y: 52995.64 },
    { x: new Date('2025-07-05'), y: 53044.53 },
    { x: new Date('2025-07-06'), y: 52987.22 },
    { x: new Date('2025-07-07'), y: 52965.24 },
    { x: new Date('2025-07-08'), y: 53095.70 },
    { x: new Date('2025-07-09'), y: 53105.66 },
    { x: new Date('2025-07-10'), y: 53075.75 },
    { x: new Date('2025-07-12'), y: 53134.61 },
    { x: new Date('2025-07-13'), y: 53046.73 },
    { x: new Date('2025-07-14'), y: 53017.09 },
    { x: new Date('2025-07-16'), y: 53151.58 },
    { x: new Date('2025-07-17'), y: 53144.90 },
    { x: new Date('2025-07-19'), y: 53330.42 },
    { x: new Date('2025-07-20'), y: 53232.00 },
    { x: new Date('2025-07-21'), y: 53265.99 },
    { x: new Date('2025-07-22'), y: 53231.77 },
    { x: new Date('2025-07-23'), y: 53432.54 },
    { x: new Date('2025-07-24'), y: 53377.61 },
    { x: new Date('2025-07-25'), y: 53176.95 },
    { x: new Date('2025-07-26'), y: 53310.30 },
    { x: new Date('2025-07-27'), y: 53218.46 },
    { x: new Date('2025-07-29'), y: 53376.79 },
    { x: new Date('2025-07-30'), y: 53359.48 },
    { x: new Date('2025-07-31'), y: 53551.89 },
    { x: new Date('2025-08-01'), y: 53657.30 },
    { x: new Date('2025-08-02'), y: 53520.97 },
    { x: new Date('2025-08-03'), y: 53437.56 },
    { x: new Date('2025-08-04'), y: 54147.34 },
    { x: new Date('2025-08-05'), y: 53348.50 },
    { x: new Date('2025-08-06'), y: 53365.95 },
    { x: new Date('2025-08-07'), y: 53317.00 },
    { x: new Date('2025-08-08'), y: 53165.52 },
    { x: new Date('2025-08-09'), y: 53336.43 },
    { x: new Date('2025-08-10'), y: 53217.62 },
    { x: new Date('2025-08-11'), y: 53189.92 },
    { x: new Date('2025-08-12'), y: 53248.22 },
    { x: new Date('2025-08-13'), y: 53195.80 },
    { x: new Date('2025-08-14'), y: 52917.01 },
    { x: new Date('2025-08-15'), y: 52761.99 },
    { x: new Date('2025-08-16'), y: 52737.78 },
    { x: new Date('2025-08-18'), y: 53051.12 },
    { x: new Date('2025-08-19'), y: 52864.98 },
    { x: new Date('2025-08-20'), y: 53168.32 },
    { x: new Date('2025-08-21'), y: 53221.92 },
    { x: new Date('2025-08-22'), y: 53283.75 },
    { x: new Date('2025-08-23'), y: 53167.99 },
    { x: new Date('2025-08-24'), y: 53104.25 },
    { x: new Date('2025-08-25'), y: 53258.47 },
    { x: new Date('2025-08-26'), y: 53200.05 },
    { x: new Date('2025-08-27'), y: 53276.43 },
    { x: new Date('2025-08-28'), y: 53363.96 },
    { x: new Date('2025-08-29'), y: 53270.15 },
    { x: new Date('2025-08-30'), y: 53806.41 },
    { x: new Date('2025-08-31'), y: 53588.08 }];

const options = {
    chart: {
        type: 'area',
        height: 300,
        toolbar: { show: false },
        zoom: { enabled: false }
    },
    series: [{ name: '', data: fullData }],
    xaxis: {
        type: 'datetime'
    },
    yaxis: {
        tickAmount: 7,
        labels: {
            formatter: val => `${val.toLocaleString('id-ID')}`,
            offsetX: -17
        }
    },
    grid: {
        padding: {
            left: -10,
            right: 0
        }
    },
    tooltip: {
        x: { format: 'dd MMM yyyy' },
        y: {
            formatter: val => `Rp ${val.toLocaleString('id-ID')}`
        }
    },
    stroke: {
        curve: 'smooth',
        width: 2
    },
    fill: {
        type: 'gradient',
        gradient: {
            shadeIntensity: 1,
            opacityFrom: 0.8,
            opacityTo: 0,
            stops: [0, 90, 100]
        }
    },
    colors: ['#007bff'],
    legend: { show: false },
    dataLabels: { enabled: false }
};

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

function updateChart(months) {
    const sortedData = [...fullData].sort((a, b) => a.x - b.x);
    const latestDate = sortedData[sortedData.length - 1].x;
    const start = new Date(latestDate);
    start.setMonth(start.getMonth() - months);

    const filtered = fullData.filter(item => item.x >= start && item.x <= latestDate);
    chart.updateSeries([{ name: '', data: filtered }]);
}

document.querySelectorAll('.filter-btn').forEach(btn => {
    btn.addEventListener('click', () => {
        document.querySelectorAll('.filter-btn').forEach(b => b.classList.remove('active'));
        btn.classList.add('active');
        const months = parseInt(btn.dataset.months);
        updateChart(months);
    });
});
updateChart(1);