const fullData = [
    { x: new Date('2025-07-15'), y: 404.51 },
    { x: new Date('2025-07-16'), y: 404.18 },
    { x: new Date('2025-07-17'), y: 405.35 },
    { x: new Date('2025-07-18'), y: 403.27 },
    { x: new Date('2025-07-21'), y: 403.87 },
    { x: new Date('2025-07-22'), y: 403.78 },
    { x: new Date('2025-07-23'), y: 402.76 },
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    { x: new Date('2025-07-25'), y: 402.22 },
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    { x: new Date('2025-07-29'), y: 403.99 },
    { x: new Date('2025-07-30'), y: 403.81 },
    { x: new Date('2025-07-31'), y: 404.97 },
    { x: new Date('2025-08-01'), y: 405.99 },
    { x: new Date('2025-08-04'), y: 403.14 },
    { x: new Date('2025-08-05'), y: 402.75 },
    { x: new Date('2025-08-06'), y: 402.58 },
    { x: new Date('2025-08-07'), y: 401.16 },
    { x: new Date('2025-08-08'), y: 400.61 },
    { x: new Date('2025-08-11'), y: 401.26 },
    { x: new Date('2025-08-12'), y: 399.86 },
    { x: new Date('2025-08-13'), y: 397.16 },
    { x: new Date('2025-08-14'), y: 394.57 },
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    { x: new Date('2025-08-18'), y: 395.29 },
    { x: new Date('2025-08-19'), y: 397.13 },
    { x: new Date('2025-08-20'), y: 397.47 },
    { x: new Date('2025-08-21'), y: 397.84 },
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    { x: new Date('2025-12-02'), y: 392.53 },
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    { x: new Date('2025-12-25'), y: 391 },
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    { x: new Date('2025-12-30'), y: 390.31 },
    { x: new Date('2025-12-31'), y: 388.16 },
    { x: new Date('2026-01-01'), y: 388.22 },
    { x: new Date('2026-01-02'), y: 388.57 },
    { x: new Date('2026-01-05'), y: 388.98 },
    { x: new Date('2026-01-06'), y: 389.26 },
    { x: new Date('2026-01-07'), y: 389.8 },
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    { x: new Date('2026-01-20'), y: 391.62 },
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    { x: new Date('2026-03-10'), y: 382.56 },
    { x: new Date('2026-03-11'), y: 382.71 },
    { x: new Date('2026-03-12'), y: 382.75 },
    { x: new Date('2026-03-13'), y: 383.24 },
    { x: new Date('2026-03-16'), y: 384.69 },
    { x: new Date('2026-03-17'), y: 384.26 },
    { x: new Date('2026-03-18'), y: 384.07 },
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    { x: new Date('2026-03-23'), y: 383.26 },
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    { x: new Date('2026-03-25'), y: 381.44 },
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    { x: new Date('2026-03-30'), y: 382.36 },
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    { x: new Date('2026-04-01'), y: 381.8 },
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    { x: new Date('2026-05-20'), y: 386.26 },
    { x: new Date('2026-05-21'), y: 387.15 },
    { x: new Date('2026-05-22'), y: 387.1 },
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    { x: new Date('2026-05-28'), y: 387.55 },
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    { x: new Date('2026-06-01'), y: 389.34 },
    { x: new Date('2026-06-02'), y: 388.29 },
    { x: new Date('2026-06-03'), y: 390.43 },
    { x: new Date('2026-06-04'), y: 391.6 },
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    { x: new Date('2026-06-09'), y: 391.44 },
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    { x: new Date('2026-06-12'), y: 386.23 },
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    { x: new Date('2026-06-16'), y: 382.24 },
    { x: new Date('2026-06-17'), y: 382.57 },
    { x: new Date('2026-06-18'), y: 381.24 },
    { x: new Date('2026-06-19'), y: 382.91 },
    { x: new Date('2026-06-22'), y: 383.72 },
    { x: new Date('2026-06-23'), y: 383.89 },
    { x: new Date('2026-06-24'), y: 385.64 },
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    { x: new Date('2026-07-03'), y: 383.52 },
    { x: new Date('2026-07-06'), y: 384.22 },
    { x: new Date('2026-07-07'), y: 383.78 },
    { x: new Date('2026-07-08'), y: 384.11 },
    { x: new Date('2026-07-09'), y: 385.38 },
    { x: new Date('2026-07-10'), y: 384.23 },
    { x: new Date('2026-07-13'), y: 385.13 },
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    { x: new Date('2026-07-23'), y: 378.65 },
    { x: new Date('2026-07-24'), y: 379.01 },
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    { x: new Date('2026-07-28'), y: 381.19 },
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    { x: new Date('2026-07-30'), y: 381.14 },
    { x: new Date('2026-07-31'), y: 378.72 },
    { x: new Date('2026-08-03'), y: 378.38 },
    { x: new Date('2026-08-04'), y: 379.11 },
    { x: new Date('2026-08-05'), y: 376.9 },
    { x: new Date('2026-08-06'), y: 376.27 },
    { x: new Date('2026-08-07'), y: 375.05 },
    { x: new Date('2026-08-10'), y: 372.17 },
    { x: new Date('2026-08-11'), y: 373.67 },
    { x: new Date('2026-08-12'), y: 374.13 },
    { x: new Date('2026-08-13'), y: 373.58 },
    { x: new Date('2026-08-14'), y: 372.27 },
    { x: new Date('2026-08-17'), y: 372.09 },
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    { x: new Date('2026-08-19'), y: 372 },
    { x: new Date('2026-08-20'), y: 369.61 },
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    { x: new Date('2026-08-24'), y: 368.4 },
    { x: new Date('2026-08-25'), y: 368.26 },
    { x: new Date('2026-08-26'), y: 367.89 },
    { x: new Date('2026-08-27'), y: 368.11 },
    { x: new Date('2026-08-28'), y: 366.69 },
    { x: new Date('2026-08-31'), y: 367.12 },
    { x: new Date('2026-09-01'), y: 366.9 },
    { x: new Date('2026-09-02'), y: 367.72 },
    { x: new Date('2026-09-03'), y: 365.31 },
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    { x: new Date('2026-09-07'), y: 364.12 },
    { x: new Date('2026-09-08'), y: 363.8 },
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    { x: new Date('2026-09-10'), y: 361.22 },
    { x: new Date('2026-09-11'), y: 362.25 },
    { x: new Date('2026-09-14'), y: 362.91 },
    { x: new Date('2026-09-15'), y: 363.63 },
    { x: new Date('2026-09-16'), y: 363.36 },
    { x: new Date('2026-09-17'), y: 363.97 },
    { x: new Date('2026-09-18'), y: 363.68 },
    { x: new Date('2026-09-21'), y: 365.42 },
    { x: new Date('2026-09-22'), y: 366 },
    { x: new Date('2026-09-23'), y: 364.54 },
    { x: new Date('2026-09-24'), y: 366.3 },
    { x: new Date('2026-09-25'), y: 365.38 },
    { x: new Date('2026-09-28'), y: 366.88 },
    { x: new Date('2026-09-29'), y: 366.69 },
    { x: new Date('2026-09-30'), y: 364.73 },
    { x: new Date('2026-10-01'), y: 366.64 },
    { x: new Date('2026-10-02'), y: 363.76 },
    { x: new Date('2026-10-05'), y: 364.25 },
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    { x: new Date('2026-10-07'), y: 363.42 },
    { x: new Date('2026-10-08'), y: 363.35 },
    { x: new Date('2026-10-09'), y: 362.9 },
    { x: new Date('2026-10-12'), y: 363.14 },
    { x: new Date('2026-10-13'), y: 362.35 },
    { x: new Date('2026-10-14'), y: 362.37 },
    { x: new Date('2026-10-15'), y: 362.38 },
    { x: new Date('2026-10-16'), y: 363.63 },
    { x: new Date('2026-10-19'), y: 363.98 },
    { x: new Date('2026-10-20'), y: 362.82 },
    { x: new Date('2026-10-21'), y: 363.3 },
    { x: new Date('2026-10-22'), y: 363.59 },
    { x: new Date('2026-10-23'), y: 363.985311 },
    { x: new Date('2026-10-24'), y: 363.739661 },
    { x: new Date('2026-10-25'), y: 363.739661 },
    { x: new Date('2026-10-26'), y: 363.41279 },
    { x: new Date('2026-10-27'), y: 365.030448 },
    { x: new Date('2026-10-28'), y: 364.522587 },
    { x: new Date('2026-10-29'), y: 364.522797 },
    { x: new Date('2026-10-30'), y: 363.486351 },
    { x: new Date('2026-10-31'), y: 362.988702 },
    { x: new Date('2026-11-01'), y: 362.980211 },
    { x: new Date('2026-11-02'), y: 363.221841 },
    { x: new Date('2026-11-03'), y: 362.970312 },
    { x: new Date('2026-11-04'), y: 362.681364 },
    { x: new Date('2026-11-05'), y: 362.477873 },
    { x: new Date('2026-11-06'), y: 360.907294 },
    { x: new Date('2026-11-07'), y: 360.699851 },
    { x: new Date('2026-11-08'), y: 360.717189 }];

const options = {
    chart: {
        type: 'area',
        height: 300,
        toolbar: { show: false },
        zoom: { enabled: false }
    },
    series: [{ name: '', data: fullData }],
    xaxis: {
        type: 'datetime'
    },
    yaxis: {
        tickAmount: 10,
        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 startTime = start.getTime();

    const filtered = fullData.filter(item =>
        item.x >= startTime && item.x <= latestDate
    );

    chart.updateSeries([{ name: '', data: filtered }], true);

    chart.updateOptions({
        xaxis: {
            type: 'datetime',
            min: startTime,
            max: latestDate
        }
    });
}

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);