const fullData = [
    { x: new Date('2024-10-26'), y: 186.81 },
    { x: new Date('2024-10-27'), y: 186.81 },
    { x: new Date('2024-10-28'), y: 185.99 },
    { x: new Date('2024-10-29'), y: 187.24 },
    { x: new Date('2024-10-30'), y: 187.37 },
    { x: new Date('2024-10-31'), y: 186.61 },
    { x: new Date('2024-11-01'), y: 187.00 },
    { x: new Date('2024-11-02'), y: 188.38 },
    { x: new Date('2024-11-03'), y: 188.38 },
    { x: new Date('2024-11-04'), y: 188.38 },
    { x: new Date('2024-11-05'), y: 187.46 },
    { x: new Date('2024-11-06'), y: 186.85 },
    { x: new Date('2024-11-07'), y: 187.88 },
    { x: new Date('2024-11-08'), y: 184.64 },
    { x: new Date('2024-11-09'), y: 185.44 },
    { x: new Date('2024-11-10'), y: 185.44 },
    { x: new Date('2024-11-11'), y: 185.72 },
    { x: new Date('2024-11-12'), y: 186.86 },
    { x: new Date('2024-11-13'), y: 187.53 },
    { x: new Date('2024-11-14'), y: 187.36 },
    { x: new Date('2024-11-15'), y: 189.12 },
    { x: new Date('2024-11-16'), y: 188.22 },
    { x: new Date('2024-11-17'), y: 188.22 },
    { x: new Date('2024-11-18'), y: 187.77 },
    { x: new Date('2024-11-19'), y: 187.82 },
    { x: new Date('2024-11-21'), y: 188.85 },
    { x: new Date('2024-11-22'), y: 188.44 },
    { x: new Date('2024-11-23'), y: 188.71 },
    { x: new Date('2024-11-24'), y: 188.71 },
    { x: new Date('2024-11-26'), y: 188.29 },
    { x: new Date('2024-11-27'), y: 188.73 },
    { x: new Date('2024-11-28'), y: 187.78 },
    { x: new Date('2024-11-29'), y: 187.63 },
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    { x: new Date('2024-12-17'), y: 188.90 },
    { x: new Date('2024-12-18'), y: 188.99 },
    { x: new Date('2024-12-19'), y: 191.34 },
    { x: new Date('2024-12-20'), y: 191.81 },
    { x: new Date('2024-12-22'), y: 190.46 },
    { x: new Date('2024-12-23'), y: 190.46 },
    { x: new Date('2024-12-24'), y: 190.80 },
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    { x: new Date('2024-12-30'), y: 190.12 },
    { x: new Date('2024-12-31'), y: 188.65 },
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    { x: new Date('2025-01-03'), y: 189.26 },
    { x: new Date('2025-01-04'), y: 188.84 },
    { x: new Date('2025-01-06'), y: 188.84 },
    { x: new Date('2025-01-15'), y: 188.31 },
    { x: new Date('2025-01-16'), y: 189.59 },
    { x: new Date('2025-01-17'), y: 189.59 },
    { x: new Date('2025-01-19'), y: 189.20 },
    { x: new Date('2025-01-20'), y: 189.02 },
    { x: new Date('2025-01-21'), y: 189.11 },
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    { x: new Date('2025-01-23'), y: 188.21 },
    { x: new Date('2025-01-24'), y: 187.81 },
    { x: new Date('2025-01-25'), y: 187.65 },
    { x: new Date('2025-01-26'), y: 187.65 },
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    { x: new Date('2025-01-28'), y: 187.52 },
    { x: new Date('2025-01-29'), y: 187.21 },
    { x: new Date('2025-01-31'), y: 187.88 },
    { x: new Date('2025-02-01'), y: 188.64 },
    { x: new Date('2025-02-03'), y: 188.94 },
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    { x: new Date('2025-02-06'), y: 186.47 },
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    { x: new Date('2025-02-09'), y: 185.87 },
    { x: new Date('2025-02-10'), y: 185.66 },
    { x: new Date('2025-02-11'), y: 185.66 },
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    { x: new Date('2025-02-14'), y: 188.10 },
    { x: new Date('2025-02-17'), y: 186.92 },
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    { x: new Date('2025-02-19'), y: 187.54 },
    { x: new Date('2025-02-20'), y: 188.10 },
    { x: new Date('2025-02-24'), y: 188.10 },
    { x: new Date('2025-02-25'), y: 187.68 },
    { x: new Date('2025-02-26'), y: 187.44 },
    { x: new Date('2025-02-27'), y: 187.73 },
    { x: new Date('2025-02-28'), y: 188.64 },
    { x: new Date('2025-03-01'), y: 189.41 },
    { x: new Date('2025-03-02'), y: 189.42 },
    { x: new Date('2025-03-03'), y: 189.04 },
    { x: new Date('2025-03-04'), y: 188.28 },
    { x: new Date('2025-03-06'), y: 187.62 },
    { x: new Date('2025-03-07'), y: 187.31 },
    { x: new Date('2025-03-08'), y: 187.11 },
    { x: new Date('2025-03-10'), y: 186.87 },
    { x: new Date('2025-03-11'), y: 187.37 },
    { x: new Date('2025-03-12'), y: 188.33 },
    { x: new Date('2025-03-13'), y: 188.41 },
    { x: new Date('2025-03-14'), y: 188.49 },
    { x: new Date('2025-03-15'), y: 187.87 },
    { x: new Date('2025-03-16'), y: 187.91 },
    { x: new Date('2025-03-17'), y: 187.91 },
    { x: new Date('2025-03-18'), y: 187.80 },
    { x: new Date('2025-03-19'), y: 190.19 },
    { x: new Date('2025-03-20'), y: 191.21 },
    { x: new Date('2025-03-21'), y: 190.89 },
    { x: new Date('2025-03-22'), y: 191.64 },
    { x: new Date('2025-03-23'), y: 191.67 },
    { x: new Date('2025-03-24'), y: 191.79 },
    { x: new Date('2025-03-25'), y: 191.79 },
    { x: new Date('2025-03-26'), y: 193.64 },
    { x: new Date('2025-03-27'), y: 193.56 },
    { x: new Date('2025-03-28'), y: 193.50 },
    { x: new Date('2025-03-30'), y: 193.82 },
    { x: new Date('2025-03-31'), y: 193.70 },
    { x: new Date('2025-04-01'), y: 194.15 },
    { x: new Date('2025-04-02'), y: 193.97 },
    { x: new Date('2025-04-03'), y: 194.72 },
    { x: new Date('2025-04-04'), y: 194.76 },
    { x: new Date('2025-04-05'), y: 195.66 },
    { x: new Date('2025-04-06'), y: 196.20 },
    { x: new Date('2025-04-07'), y: 196.38 },
    { x: new Date('2025-04-08'), y: 194.52 },
    { x: new Date('2025-04-09'), y: 196.29 },
    { x: new Date('2025-04-10'), y: 194.92 },
    { x: new Date('2025-04-11'), y: 195.20 },
    { x: new Date('2025-04-12'), y: 194.94 },
    { x: new Date('2025-04-13'), y: 195.03 },
    { x: new Date('2025-04-14'), y: 195.03 },
    { x: new Date('2025-04-15'), y: 194.90 },
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    { x: new Date('2025-04-18'), y: 197.34 },
    { x: new Date('2025-04-19'), y: 197.19 },
    { x: new Date('2025-04-20'), y: 197.23 },
    { x: new Date('2025-04-21'), y: 197.07 },
    { x: new Date('2025-04-22'), y: 197.46 },
    { x: new Date('2025-04-23'), y: 197.82 },
    { x: new Date('2025-04-24'), y: 197.47 },
    { x: new Date('2025-04-26'), y: 197.21 },
    { x: new Date('2025-04-27'), y: 197.22 },
    { x: new Date('2025-04-28'), y: 196.96 },
    { x: new Date('2025-05-02'), y: 196.29 },
    { x: new Date('2025-05-05'), y: 194.59 },
    { x: new Date('2025-05-06'), y: 194.59 },
    { x: new Date('2025-05-08'), y: 194.80 },
    { x: new Date('2025-05-09'), y: 192.87 },
    { x: new Date('2025-05-10'), y: 193.54 },
    { x: new Date('2025-05-11'), y: 193.49 },
    { x: new Date('2025-05-12'), y: 193.48 },
    { x: new Date('2025-05-13'), y: 195.31 },
    { x: new Date('2025-05-14'), y: 194.02 },
    { x: new Date('2025-05-15'), y: 193.91 },
    { x: new Date('2025-05-16'), y: 192.91 },
    { x: new Date('2025-05-17'), y: 192.30 },
    { x: new Date('2025-05-19'), y: 192.39 },
    { x: new Date('2025-05-20'), y: 192.52 },
    { x: new Date('2025-05-21'), y: 191.83 },
    { x: new Date('2025-05-22'), y: 191.41 },
    { x: new Date('2025-05-24'), y: 189.97 },
    { x: new Date('2025-05-26'), y: 190.41 },
    { x: new Date('2025-05-27'), y: 190.63 },
    { x: new Date('2025-06-04'), y: 190.44 },
    { x: new Date('2025-06-05'), y: 189.70 },
    { x: new Date('2025-06-06'), y: 189.42 },
    { x: new Date('2025-06-07'), y: 189.94 },
    { x: new Date('2025-06-08'), y: 189.92 },
    { x: new Date('2025-06-10'), y: 190.03 },
    { x: new Date('2025-06-11'), y: 190.08 },
    { x: new Date('2025-06-12'), y: 190.22 },
    { x: new Date('2025-06-13'), y: 189.54 },
    { x: new Date('2025-06-14'), y: 189.73 },
    { x: new Date('2025-06-15'), y: 189.69 },
    { x: new Date('2025-06-16'), y: 189.24 },
    { x: new Date('2025-06-17'), y: 189.54 },
    { x: new Date('2025-06-18'), y: 188.58 },
    { x: new Date('2025-06-20'), y: 188.63 },
    { x: new Date('2025-06-21'), y: 189.11 },
    { x: new Date('2025-06-22'), y: 189.18 },
    { x: new Date('2025-06-23'), y: 189.34 },
    { x: new Date('2025-06-24'), y: 190.51 },
    { x: new Date('2025-06-25'), y: 189.81 },
    { x: new Date('2025-06-26'), y: 189.47 },
    { x: new Date('2025-06-27'), y: 189.16 },
    { x: new Date('2025-06-28'), y: 189.77 },
    { x: new Date('2025-06-29'), y: 189.71 },
    { x: new Date('2025-06-30'), y: 189.70 },
    { x: new Date('2025-07-01'), y: 189.05 },
    { x: new Date('2025-07-02'), y: 189.32 },
    { x: new Date('2025-07-04'), y: 189.65 },
    { x: new Date('2025-07-05'), y: 189.44 },
    { x: new Date('2025-07-06'), y: 189.46 },
    { x: new Date('2025-07-07'), y: 189.33 },
    { x: new Date('2025-07-08'), y: 189.20 },
    { x: new Date('2025-07-09'), y: 189.63 },
    { x: new Date('2025-07-10'), y: 189.71 },
    { x: new Date('2025-07-12'), y: 189.07 },
    { x: new Date('2025-07-13'), y: 188.99 },
    { x: new Date('2025-07-14'), y: 188.88 },
    { x: new Date('2025-07-16'), y: 189.32 },
    { x: new Date('2025-07-17'), y: 189.75 },
    { x: new Date('2025-07-19'), y: 189.31 },
    { x: new Date('2025-07-20'), y: 189.20 },
    { x: new Date('2025-07-21'), y: 188.96 },
    { x: new Date('2025-07-22'), y: 189.08 },
    { x: new Date('2025-07-23'), y: 188.51 },
    { x: new Date('2025-07-24'), y: 188.27 },
    { x: new Date('2025-07-25'), y: 188.37 },
    { x: new Date('2025-07-26'), y: 188.79 },
    { x: new Date('2025-07-27'), y: 188.76 },
    { x: new Date('2025-07-29'), y: 188.68 },
    { x: new Date('2025-07-30'), y: 188.32 },
    { x: new Date('2025-07-31'), y: 187.40 },
    { x: new Date('2025-08-01'), y: 188.19 },
    { x: new Date('2025-08-02'), y: 188.13 },
    { x: new Date('2025-08-03'), y: 188.23 },
    { x: new Date('2025-08-04'), y: 188.22 },
    { x: new Date('2025-08-05'), y: 186.61 },
    { x: new Date('2025-08-06'), y: 186.58 },
    { x: new Date('2025-08-07'), y: 186.41 },
    { x: new Date('2025-08-08'), y: 186.50 },
    { x: new Date('2025-08-09'), y: 186.07 },
    { x: new Date('2025-08-10'), y: 186.00 },
    { x: new Date('2025-08-11'), y: 185.76 },
    { x: new Date('2025-08-12'), y: 185.58 },
    { x: new Date('2025-08-13'), y: 185.52 },
    { x: new Date('2025-08-14'), y: 184.67 },
    { x: new Date('2025-08-15'), y: 184.11 },
    { x: new Date('2025-08-16'), y: 184.58 },
    { x: new Date('2025-08-18'), y: 184.73 },
    { x: new Date('2025-08-19'), y: 185.48 },
    { x: new Date('2025-08-20'), y: 186.81 },
    { x: new Date('2025-08-21'), y: 187.05 },
    { x: new Date('2025-08-22'), y: 187.00 },
    { x: new Date('2025-08-23'), y: 186.48 },
    { x: new Date('2025-08-24'), y: 186.40 },
    { x: new Date('2025-08-25'), y: 186.41 },
    { x: new Date('2025-08-26'), y: 185.59 },
    { x: new Date('2025-08-27'), y: 185.92 },
    { x: new Date('2025-08-28'), y: 186.85 },
    { x: new Date('2025-08-29'), y: 186.61 },
    { x: new Date('2025-08-30'), y: 187.09 },
    { x: new Date('2025-08-31'), y: 187.08 },
    { x: new Date('2025-09-01'), y: 186.64 },
    { x: new Date('2025-09-02'), y: 186.51 },
    { x: new Date('2025-09-03'), y: 186.42 },
    { x: new Date('2025-09-04'), y: 186.59 },
    { x: new Date('2025-09-05'), y: 186.48 },
    { x: new Date('2025-09-06'), y: 185.90 },
    { x: new Date('2025-09-07'), y: 185.89 },
    { x: new Date('2025-09-08'), y: 185.82 },
    { x: new Date('2025-09-09'), y: 186.06 },
    { x: new Date('2025-09-10'), y: 186.52 },
    { x: new Date('2025-09-11'), y: 186.95 },
    { x: new Date('2025-09-12'), y: 186.25 },
    { x: new Date('2025-09-13'), y: 185.44 },
    { x: new Date('2025-09-14'), y: 185.57 },
    { x: new Date('2025-09-15'), y: 185.62 },
    { x: new Date('2025-09-16'), y: 186.03 },
    { x: new Date('2025-09-17'), y: 186.46 },
    { x: new Date('2025-09-18'), y: 186.99 },
    { x: new Date('2025-09-20'), y: 188.62 },
    { x: new Date('2025-09-21'), y: 188.58 },
    { x: new Date('2025-09-22'), y: 188.73 },
    { x: new Date('2025-09-23'), y: 188.07 },
    { x: new Date('2025-09-24'), y: 187.59 },
    { x: new Date('2025-09-25'), y: 188.22 },
    { x: new Date('2025-09-26'), y: 188.92 },
    { x: new Date('2025-09-27'), y: 188.57 },
    { x: new Date('2025-09-28'), y: 188.56 },
    { x: new Date('2025-09-29'), y: 188.38 },
    { x: new Date('2025-09-30'), y: 187.63 },
    { x: new Date('2025-10-01'), y: 187.63 },
    { x: new Date('2025-10-02'), y: 187.39 },
    { x: new Date('2025-10-03'), y: 187.18 },
    { x: new Date('2025-10-04'), y: 186.70 },
    { x: new Date('2025-10-05'), y: 186.66 },
    { x: new Date('2025-10-07'), y: 186.97 },
    { x: new Date('2025-10-08'), y: 186.88 },
    { x: new Date('2025-10-09'), y: 186.92 },
    { x: new Date('2025-10-10'), y: 186.24 },
    { x: new Date('2025-10-11'), y: 186.80 },
    { x: new Date('2025-10-12'), y: 186.80 },
    { x: new Date('2025-10-13'), y: 186.80 },
    { x: new Date('2025-10-14'), y: 186.70 },
    { x: new Date('2025-10-15'), y: 186.73 },
    { x: new Date('2025-10-16'), y: 188.39 },
    { x: new Date('2025-10-17'), y: 188.36 },
    { x: new Date('2025-10-18'), y: 188.18 },
    { x: new Date('2025-10-20'), y: 188.25 },
    { x: new Date('2025-10-21'), y: 188.33 },
    { x: new Date('2025-10-22'), y: 188.47 },
    { x: new Date('2025-10-23'), y: 188.73 },
    { x: new Date('2025-10-24'), y: 189.27 },
    { x: new Date('2025-10-25'), y: 189.21 },
    { x: new Date('2025-10-26'), y: 189.21 },
    { x: new Date('2025-10-27'), y: 189.20 },
    { x: new Date('2025-10-28'), y: 188.97 },
    { x: new Date('2025-10-29'), y: 188.34 },
    { x: new Date('2025-10-30'), y: 188.14 },
    { x: new Date('2025-10-31'), y: 187.71 },
    { x: new Date('2025-11-01'), y: 187.50 },
    { x: new Date('2025-11-02'), y: 187.50 },
    { x: new Date('2025-11-03'), y: 187.31 },
    { x: new Date('2025-11-04'), y: 188.01 },
    { x: new Date('2025-11-05'), y: 188.40 },
    { x: new Date('2025-11-06'), y: 188.17 },
    { x: new Date('2025-11-07'), y: 188.31 },
    { x: new Date('2025-11-08'), y: 188.03 },
    { x: new Date('2025-11-09'), y: 188.19 },
    { x: new Date('2025-11-10'), y: 188.12 },
    { x: new Date('2025-11-11'), y: 188.07 },
    { x: new Date('2025-11-12'), y: 187.99 },
    { x: new Date('2025-11-13'), y: 188.66 },
    { x: new Date('2025-11-14'), y: 188.66 },
    { x: new Date('2025-11-15'), y: 188.23 },
    { x: new Date('2025-11-16'), y: 188.27 },
    { x: new Date('2025-11-17'), y: 188.27 },
    { x: new Date('2025-11-18'), y: 188.32 },
    { x: new Date('2025-11-19'), y: 188.77 },
    { x: new Date('2025-11-20'), y: 188.83 },
    { x: new Date('2025-11-21'), y: 188.77 },
    { x: new Date('2025-11-22'), y: 188.73 },
    { x: new Date('2025-11-23'), y: 186.79 },
    { x: new Date('2025-11-24'), y: 186.79 },
    { x: new Date('2025-11-25'), y: 186.72 },
    { x: new Date('2025-11-26'), y: 186.72 },
    { x: new Date('2025-11-27'), y: 186.39 },
    { x: new Date('2025-11-28'), y: 186.82 },
    { x: new Date('2025-11-29'), y: 186.26 },
    { x: new Date('2025-11-30'), y: 186.18 },
    { x: new Date('2025-12-01'), y: 186.14 },
    { x: new Date('2025-12-02'), y: 185.44 },
    { x: new Date('2025-12-03'), y: 184.82 },
    { x: new Date('2025-12-04'), y: 184.15 },
    { x: new Date('2025-12-05'), y: 185.13 },
    { x: new Date('2025-12-06'), y: 185.28 },
    { x: new Date('2025-12-07'), y: 185.22 }];

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);