const fullData = [
    { x: new Date('2024-02-02'), y: 11733 },
    { x: new Date('2024-02-05'), y: 11714 },
    { x: new Date('2024-02-06'), y: 11692 },
    { x: new Date('2024-02-07'), y: 11675 },
    { x: new Date('2024-02-08'), y: 11653 },
    { x: new Date('2024-02-09'), y: 11630 },
    { x: new Date('2024-02-10'), y: 11597 },
    { x: new Date('2024-02-12'), y: 11601 },
    { x: new Date('2024-02-13'), y: 11575 },
    { x: new Date('2024-02-14'), y: 11587 },
    { x: new Date('2024-05-20'), y: 11874 },
    { x: new Date('2024-08-01'), y: 12150 },
    { x: new Date('2024-08-02'), y: 12163 },
    { x: new Date('2024-08-05'), y: 12214 },
    { x: new Date('2024-08-06'), y: 12220 },
    { x: new Date('2024-08-07'), y: 12090 },
    { x: new Date('2024-08-28'), y: 11881 },
    { x: new Date('2024-08-29'), y: 11836 },
    { x: new Date('2024-08-30'), y: 11885 },
    { x: new Date('2024-09-02'), y: 11898 },
    { x: new Date('2024-09-03'), y: 11902 },
    { x: new Date('2024-09-04'), y: 11840 },
    { x: new Date('2024-09-05'), y: 11828 },
    { x: new Date('2024-09-05'), y: 11832 },
    { x: new Date('2024-09-06'), y: 11822 },
    { x: new Date('2024-09-07'), y: 11867 },
    { x: new Date('2024-09-08'), y: 11867 },
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    { x: new Date('2024-09-10'), y: 11815 },
    { x: new Date('2024-09-19'), y: 11828 },
    { x: new Date('2024-09-20'), y: 11698 },
    { x: new Date('2024-09-23'), y: 11744 },
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    { x: new Date('2024-09-25'), y: 11757 },
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    { x: new Date('2024-10-02'), y: 11827 },
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    { x: new Date('2024-10-05'), y: 12020 },
    { x: new Date('2024-10-07'), y: 12009 },
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    { x: new Date('2024-10-10'), y: 12016 },
    { x: new Date('2024-10-11'), y: 11997 },
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    { x: new Date('2024-11-01'), y: 11915 },
    { x: new Date('2024-11-02'), y: 11947 },
    { x: new Date('2024-11-03'), y: 11947 },
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    { x: new Date('2024-11-14'), y: 11772 },
    { x: new Date('2024-11-15'), y: 11867 },
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    { x: new Date('2024-11-21'), y: 11855 },
    { x: new Date('2024-11-22'), y: 11829 },
    { x: new Date('2024-11-23'), y: 11832 },
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    { x: new Date('2024-11-26'), y: 11766 },
    { x: new Date('2024-11-27'), y: 11818 },
    { x: new Date('2024-11-28'), y: 11816 },
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    { x: new Date('2024-12-01'), y: 11821 },
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    { x: new Date('2024-12-03'), y: 11837 },
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    { x: new Date('2024-12-31'), y: 11878 },
    { x: new Date('2025-01-02'), y: 11921 },
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    { x: new Date('2025-01-20'), y: 11966 },
    { x: new Date('2025-01-21'), y: 12038 },
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    { x: new Date('2025-01-23'), y: 12009 },
    { x: new Date('2025-01-24'), y: 11976 },
    { x: new Date('2025-01-25'), y: 12015 },
    { x: new Date('2025-01-26'), y: 12015 },
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    { x: new Date('2025-01-28'), y: 11997 },
    { x: new Date('2025-01-29'), y: 11997 },
    { x: new Date('2025-01-31'), y: 12033 },
    { x: new Date('2025-02-01'), y: 12037 },
    { x: new Date('2025-02-03'), y: 11954 },
    { x: new Date('2025-02-04'), y: 12005 },
    { x: new Date('2025-02-06'), y: 12072 },
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    { x: new Date('2025-02-09'), y: 12038 },
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    { x: new Date('2025-02-12'), y: 12040 },
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    { x: new Date('2025-02-26'), y: 12220 },
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    { x: new Date('2025-02-28'), y: 12203 },
    { x: new Date('2025-03-01'), y: 12279 },
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    { x: new Date('2025-04-12'), y: 12720.17 },
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    { x: new Date('2025-04-16'), y: 12761.54 },
    { x: new Date('2025-04-17'), y: 12797.15 },
    { x: new Date('2025-04-18'), y: 12853.27 },
    { x: new Date('2025-04-19'), y: 12841.23 },
    { x: new Date('2025-04-20'), y: 12842.38 },
    { x: new Date('2025-04-21'), y: 12874.58 },
    { x: new Date('2025-04-22'), y: 12897.40 },
    { x: new Date('2025-04-23'), y: 12862.92 },
    { x: new Date('2025-04-24'), y: 12852.18 },
    { x: new Date('2025-04-26'), y: 12825.08 },
    { x: new Date('2025-04-27'), y: 12823.99 },
    { x: new Date('2025-04-28'), y: 12807.17 },
    { x: new Date('2025-05-02'), y: 12692.22 },
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    { x: new Date('2025-05-11'), y: 12744.82 },
    { x: new Date('2025-05-12'), y: 12739.56 },
    { x: new Date('2025-05-13'), y: 12660.83 },
    { x: new Date('2025-05-14'), y: 12664.50 },
    { x: new Date('2025-05-15'), y: 12751.02 },
    { x: new Date('2025-05-16'), y: 12712.54 },
    { x: new Date('2025-05-17'), y: 12657.89 },
    { x: new Date('2025-05-19'), y: 12665.56 },
    { x: new Date('2025-05-20'), y: 12699.05 },
    { x: new Date('2025-05-21'), y: 12668.77 },
    { x: new Date('2025-05-22'), y: 12724.32 },
    { x: new Date('2025-05-24'), y: 12614.34 },
    { x: new Date('2025-05-26'), y: 12616.98 },
    { x: new Date('2025-05-27'), y: 12621.25 },
    { x: new Date('2025-06-04'), y: 12655.71 },
    { x: new Date('2025-06-05'), y: 12655.65 },
    { x: new Date('2025-06-06'), y: 12654.37 },
    { x: new Date('2025-06-07'), y: 12645.41 },
    { x: new Date('2025-06-08'), y: 12649.20 },
    { x: new Date('2025-06-10'), y: 12662.33 },
    { x: new Date('2025-06-11'), y: 12650.44 },
    { x: new Date('2025-06-12'), y: 12656.90 },
    { x: new Date('2025-06-13'), y: 12682.58 },
    { x: new Date('2025-06-14'), y: 12736.24 },
    { x: new Date('2025-06-15'), y: 12727.68 },
    { x: new Date('2025-06-16'), y: 12705.60 },
    { x: new Date('2025-06-17'), y: 12725.64 },
    { x: new Date('2025-06-18'), y: 12642.90 },
    { x: new Date('2025-06-20'), y: 12716.08 },
    { x: new Date('2025-06-21'), y: 12734.90 },
    { x: new Date('2025-06-22'), y: 12738.14 },
    { x: new Date('2025-06-23'), y: 12736.80 },
    { x: new Date('2025-06-24'), y: 12824.56 },
    { x: new Date('2025-06-25'), y: 12763.32 },
    { x: new Date('2025-06-26'), y: 12754.75 },
    { x: new Date('2025-06-27'), y: 12728.71 },
    { x: new Date('2025-06-28'), y: 12720.46 },
    { x: new Date('2025-06-29'), y: 12714.60 },
    { x: new Date('2025-06-30'), y: 12706.11 },
    { x: new Date('2025-07-01'), y: 12751.24 },
    { x: new Date('2025-07-02'), y: 12738.58 },
    { x: new Date('2025-07-04'), y: 12706.87 },
    { x: new Date('2025-07-05'), y: 12706.97 },
    { x: new Date('2025-07-06'), y: 12707.20 },
    { x: new Date('2025-07-07'), y: 12701.77 },
    { x: new Date('2025-07-08'), y: 12699.70 },
    { x: new Date('2025-07-09'), y: 12696.11 },
    { x: new Date('2025-07-10'), y: 12699.83 },
    { x: new Date('2025-07-12'), y: 12682.49 },
    { x: new Date('2025-07-13'), y: 12675.23 },
    { x: new Date('2025-07-14'), y: 12675.33 },
    { x: new Date('2025-07-16'), y: 12681.27 },
    { x: new Date('2025-07-17'), y: 12691.64 },
    { x: new Date('2025-07-19'), y: 12698.21 },
    { x: new Date('2025-07-20'), y: 12696.32 },
    { x: new Date('2025-07-21'), y: 12685.20 },
    { x: new Date('2025-07-22'), y: 12732.56 },
    { x: new Date('2025-07-23'), y: 12725.26 },
    { x: new Date('2025-07-24'), y: 12734.77 },
    { x: new Date('2025-07-25'), y: 12740.46 },
    { x: new Date('2025-07-26'), y: 12740.09 },
    { x: new Date('2025-07-27'), y: 12742.18 },
    { x: new Date('2025-07-29'), y: 12716.51 },
    { x: new Date('2025-07-30'), y: 12730.96 },
    { x: new Date('2025-07-31'), y: 12696.98 },
    { x: new Date('2025-08-01'), y: 12700.56 },
    { x: new Date('2025-08-02'), y: 12739.00 },
    { x: new Date('2025-08-03'), y: 12732.87 },
    { x: new Date('2025-08-04'), y: 12762.92 },
    { x: new Date('2025-08-05'), y: 12725.61 },
    { x: new Date('2025-08-06'), y: 12726.16 },
    { x: new Date('2025-08-07'), y: 12722.93 },
    { x: new Date('2025-08-08'), y: 12714.24 },
    { x: new Date('2025-08-09'), y: 12696.46 },
    { x: new Date('2025-08-10'), y: 12688.15 },
    { x: new Date('2025-08-11'), y: 12669.07 },
    { x: new Date('2025-08-12'), y: 12640.18 },
    { x: new Date('2025-08-13'), y: 12663.37 },
    { x: new Date('2025-08-14'), y: 12639.03 },
    { x: new Date('2025-08-15'), y: 12558.46 },
    { x: new Date('2025-08-16'), y: 12576.44 },
    { x: new Date('2025-08-18'), y: 12595.48 },
    { x: new Date('2025-08-19'), y: 12599.52 },
    { x: new Date('2025-08-20'), y: 12662.45 },
    { x: new Date('2025-08-21'), y: 12671.77 },
    { x: new Date('2025-08-22'), y: 12666.56 },
    { x: new Date('2025-08-23'), y: 12714.28 },
    { x: new Date('2025-08-24'), y: 12709.85 },
    { x: new Date('2025-08-25'), y: 12730.89 },
    { x: new Date('2025-08-26'), y: 12660.20 },
    { x: new Date('2025-08-27'), y: 12679.29 },
    { x: new Date('2025-08-28'), y: 12744.49 },
    { x: new Date('2025-08-29'), y: 12741.85 },
    { x: new Date('2025-08-30'), y: 12855.53 },
    { x: new Date('2025-08-31'), y: 12845.66 }];

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);