const fullData = [
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    { x: new Date('2024-02-05'), y: 16966 },
    { x: new Date('2024-02-06'), y: 16918 },
    { x: new Date('2024-02-07'), y: 16876 },
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    { x: new Date('2024-05-20'), y: 17373 },
    { x: new Date('2024-08-01'), y: 17572 },
    { x: new Date('2024-08-02'), y: 17538 },
    { x: new Date('2024-08-05'), y: 17655 },
    { x: new Date('2024-08-06'), y: 17731 },
    { x: new Date('2024-08-07'), y: 17517 },
    { x: new Date('2024-08-28'), y: 17272 },
    { x: new Date('2024-08-29'), y: 17148 },
    { x: new Date('2024-08-30'), y: 17105 },
    { x: new Date('2024-09-02'), y: 17157 },
    { x: new Date('2024-09-03'), y: 17205 },
    { x: new Date('2024-09-04'), y: 17178 },
    { x: new Date('2024-09-05'), y: 17130 },
    { x: new Date('2024-09-05'), y: 17111 },
    { x: new Date('2024-09-06'), y: 17111 },
    { x: new Date('2024-09-07'), y: 17110 },
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    { x: new Date('2024-09-19'), y: 17026 },
    { x: new Date('2024-09-20'), y: 16849 },
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    { x: new Date('2024-11-03'), y: 17110 },
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    { x: new Date('2024-11-14'), y: 16724 },
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    { x: new Date('2024-11-23'), y: 16534 },
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    { x: new Date('2024-11-27'), y: 16709 },
    { x: new Date('2024-11-28'), y: 16705 },
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    { x: new Date('2024-12-01'), y: 16750 },
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    { x: new Date('2024-12-03'), y: 16723 },
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    { x: new Date('2024-12-08'), y: 16740 },
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    { x: new Date('2025-01-02'), y: 16889 },
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    { x: new Date('2025-01-04'), y: 16701 },
    { x: new Date('2025-01-06'), y: 16701 },
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    { x: new Date('2025-01-20'), y: 16899 },
    { x: new Date('2025-01-21'), y: 16935 },
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    { x: new Date('2025-01-23'), y: 16958 },
    { x: new Date('2025-01-24'), y: 16906 },
    { x: new Date('2025-01-25'), y: 16901 },
    { x: new Date('2025-01-26'), y: 16901 },
    { x: new Date('2025-01-27'), y: 16901 },
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    { x: new Date('2025-01-31'), y: 16881 },
    { x: new Date('2025-02-01'), y: 16902 },
    { x: new Date('2025-02-03'), y: 16659 },
    { x: new Date('2025-02-04'), y: 16429 },
    { x: new Date('2025-02-06'), y: 16948 },
    { x: new Date('2025-02-07'), y: 16908 },
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    { x: new Date('2025-02-09'), y: 16866 },
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    { x: new Date('2025-02-11'), y: 16790 },
    { x: new Date('2025-02-12'), y: 16822 },
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    { x: new Date('2025-02-14'), y: 17037 },
    { x: new Date('2025-02-17'), y: 17040 },
    { x: new Date('2025-02-18'), y: 16993 },
    { x: new Date('2025-02-19'), y: 17026 },
    { x: new Date('2025-02-20'), y: 17036 },
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    { x: new Date('2025-02-25'), y: 17037 },
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    { x: new Date('2025-02-28'), y: 17128 },
    { x: new Date('2025-03-01'), y: 17224 },
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    { x: new Date('2025-04-01'), y: 17915.67 },
    { x: new Date('2025-04-02'), y: 17895.29 },
    { x: new Date('2025-04-03'), y: 18035.93 },
    { x: new Date('2025-04-04'), y: 18285.64 },
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    { x: new Date('2025-04-12'), y: 19016.24 },
    { x: new Date('2025-04-13'), y: 19021.31 },
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    { x: new Date('2025-04-16'), y: 19015.39 },
    { x: new Date('2025-04-17'), y: 19109.29 },
    { x: new Date('2025-04-18'), y: 19160.06 },
    { x: new Date('2025-04-19'), y: 19162.57 },
    { x: new Date('2025-04-20'), y: 19160.68 },
    { x: new Date('2025-04-21'), y: 19246.87 },
    { x: new Date('2025-04-22'), y: 19374.76 },
    { x: new Date('2025-04-23'), y: 19268.32 },
    { x: new Date('2025-04-24'), y: 19189.73 },
    { x: new Date('2025-04-26'), y: 19149.93 },
    { x: new Date('2025-04-27'), y: 19148.08 },
    { x: new Date('2025-04-28'), y: 19119.92 },
    { x: new Date('2025-05-02'), y: 18801.40 },
    { x: new Date('2025-05-05'), y: 18630.48 },
    { x: new Date('2025-05-06'), y: 18630.48 },
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    { x: new Date('2025-05-10'), y: 18623.89 },
    { x: new Date('2025-05-11'), y: 18615.59 },
    { x: new Date('2025-05-12'), y: 18573.15 },
    { x: new Date('2025-05-13'), y: 18318.13 },
    { x: new Date('2025-05-14'), y: 18410.51 },
    { x: new Date('2025-05-15'), y: 18565.36 },
    { x: new Date('2025-05-16'), y: 18459.98 },
    { x: new Date('2025-05-17'), y: 18368.26 },
    { x: new Date('2025-05-19'), y: 18399.76 },
    { x: new Date('2025-05-20'), y: 18489.35 },
    { x: new Date('2025-05-21'), y: 18484.95 },
    { x: new Date('2025-05-22'), y: 18585.60 },
    { x: new Date('2025-05-24'), y: 18387.27 },
    { x: new Date('2025-05-26'), y: 18362.69 },
    { x: new Date('2025-05-27'), y: 18448.57 },
    { x: new Date('2025-06-04'), y: 18569.55 },
    { x: new Date('2025-06-05'), y: 18588.15 },
    { x: new Date('2025-06-06'), y: 18601.11 },
    { x: new Date('2025-06-07'), y: 18571.25 },
    { x: new Date('2025-06-08'), y: 18575.68 },
    { x: new Date('2025-06-10'), y: 18591.25 },
    { x: new Date('2025-06-11'), y: 18597.41 },
    { x: new Date('2025-06-12'), y: 18662.45 },
    { x: new Date('2025-06-13'), y: 18790.84 },
    { x: new Date('2025-06-14'), y: 18840.07 },
    { x: new Date('2025-06-15'), y: 18824.68 },
    { x: new Date('2025-06-16'), y: 18798.89 },
    { x: new Date('2025-06-17'), y: 18850.72 },
    { x: new Date('2025-06-18'), y: 18713.51 },
    { x: new Date('2025-06-20'), y: 18822 },
    { x: new Date('2025-06-21'), y: 18865.44 },
    { x: new Date('2025-06-22'), y: 18868.19 },
    { x: new Date('2025-06-23'), y: 18864.48 },
    { x: new Date('2025-06-24'), y: 19048.61 },
    { x: new Date('2025-06-25'), y: 18965.36 },
    { x: new Date('2025-06-26'), y: 18980.19 },
    { x: new Date('2025-06-27'), y: 18989.47 },
    { x: new Date('2025-06-28'), y: 18984.38 },
    { x: new Date('2025-06-29'), y: 18980.84 },
    { x: new Date('2025-06-30'), y: 18999.06 },
    { x: new Date('2025-07-01'), y: 19074.68 },
    { x: new Date('2025-07-02'), y: 19119.01 },
    { x: new Date('2025-07-04'), y: 19058.62 },
    { x: new Date('2025-07-05'), y: 19064.85 },
    { x: new Date('2025-07-06'), y: 19063.44 },
    { x: new Date('2025-07-07'), y: 19059.70 },
    { x: new Date('2025-07-08'), y: 19048.56 },
    { x: new Date('2025-07-09'), y: 19042.48 },
    { x: new Date('2025-07-10'), y: 19048.80 },
    { x: new Date('2025-07-12'), y: 18938.93 },
    { x: new Date('2025-07-13'), y: 18938.32 },
    { x: new Date('2025-07-14'), y: 18970.02 },
    { x: new Date('2025-07-16'), y: 18939.47 },
    { x: new Date('2025-07-17'), y: 18939.51 },
    { x: new Date('2025-07-19'), y: 18972.81 },
    { x: new Date('2025-07-20'), y: 18969.49 },
    { x: new Date('2025-07-21'), y: 18958.08 },
    { x: new Date('2025-07-22'), y: 19047.58 },
    { x: new Date('2025-07-23'), y: 19089.86 },
    { x: new Date('2025-07-24'), y: 19107.90 },
    { x: new Date('2025-07-25'), y: 19133.39 },
    { x: new Date('2025-07-26'), y: 19149.58 },
    { x: new Date('2025-07-27'), y: 19151.89 },
    { x: new Date('2025-07-29'), y: 18986.90 },
    { x: new Date('2025-07-30'), y: 18933.04 },
    { x: new Date('2025-07-31'), y: 18842.34 },
    { x: new Date('2025-08-01'), y: 18837.56 },
    { x: new Date('2025-08-02'), y: 18953.22 },
    { x: new Date('2025-08-03'), y: 18926.16 },
    { x: new Date('2025-08-04'), y: 19007.13 },
    { x: new Date('2025-08-05'), y: 18956.88 },
    { x: new Date('2025-08-06'), y: 18948.72 },
    { x: new Date('2025-08-07'), y: 19026.89 },
    { x: new Date('2025-08-08'), y: 19025.12 },
    { x: new Date('2025-08-09'), y: 19003.05 },
    { x: new Date('2025-08-10'), y: 18987.85 },
    { x: new Date('2025-08-11'), y: 18963.82 },
    { x: new Date('2025-08-12'), y: 18877.91 },
    { x: new Date('2025-08-13'), y: 18943.27 },
    { x: new Date('2025-08-14'), y: 18946.33 },
    { x: new Date('2025-08-15'), y: 18794.73 },
    { x: new Date('2025-08-16'), y: 18859.33 },
    { x: new Date('2025-08-18'), y: 18904.11 },
    { x: new Date('2025-08-19'), y: 18874.54 },
    { x: new Date('2025-08-20'), y: 18965.67 },
    { x: new Date('2025-08-21'), y: 18975.93 },
    { x: new Date('2025-08-22'), y: 18967.93 },
    { x: new Date('2025-08-23'), y: 19060.52 },
    { x: new Date('2025-08-24'), y: 19042.92 },
    { x: new Date('2025-08-25'), y: 19092.46 },
    { x: new Date('2025-08-26'), y: 18962.99 },
    { x: new Date('2025-08-27'), y: 18977.24 },
    { x: new Date('2025-08-28'), y: 19055.15 },
    { x: new Date('2025-08-29'), y: 19083.70 },
    { x: new Date('2025-08-30'), y: 19284.86 },
    { x: new Date('2025-08-31'), y: 19266.97 }];

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);