const fullData = [
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    { x: new Date('2025-07-16'), y: 501.23 },
    { x: new Date('2025-07-17'), y: 502.46 },
    { x: new Date('2025-07-18'), y: 503.17 },
    { x: new Date('2025-07-21'), y: 505.97 },
    { x: new Date('2025-07-22'), y: 506.84 },
    { x: new Date('2025-07-23'), y: 506.37 },
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    { x: new Date('2025-07-30'), y: 500.76 },
    { x: new Date('2025-07-31'), y: 502.29 },
    { x: new Date('2025-08-01'), y: 507.78 },
    { x: new Date('2025-08-04'), y: 506.33 },
    { x: new Date('2025-08-05'), y: 506.18 },
    { x: new Date('2025-08-06'), y: 505.8 },
    { x: new Date('2025-08-07'), y: 503.87 },
    { x: new Date('2025-08-08'), y: 503.95 },
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    { x: new Date('2025-08-19'), y: 498.54 },
    { x: new Date('2025-08-20'), y: 499.69 },
    { x: new Date('2025-08-21'), y: 499.01 },
    { x: new Date('2025-08-22'), y: 504.24 },
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    { x: new Date('2025-12-03'), y: 521.25 },
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    { x: new Date('2025-12-29'), y: 530.67 },
    { x: new Date('2025-12-30'), y: 532.91 },
    { x: new Date('2025-12-31'), y: 529.37 },
    { x: new Date('2026-01-01'), y: 529.37 },
    { x: new Date('2026-01-02'), y: 531.13 },
    { x: new Date('2026-01-05'), y: 534.65 },
    { x: new Date('2026-01-06'), y: 536.34 },
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    { x: new Date('2026-01-08'), y: 533.02 },
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    { x: new Date('2026-01-20'), y: 545.72 },
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    { x: new Date('2026-03-10'), y: 534.14 },
    { x: new Date('2026-03-11'), y: 529.34 },
    { x: new Date('2026-03-12'), y: 524.7 },
    { x: new Date('2026-03-13'), y: 522.04 },
    { x: new Date('2026-03-16'), y: 525.68 },
    { x: new Date('2026-03-17'), y: 525.37 },
    { x: new Date('2026-03-18'), y: 517.84 },
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    { x: new Date('2026-03-30'), y: 517.75 },
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    { x: new Date('2026-05-21'), y: 540.93 },
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    { x: new Date('2026-06-01'), y: 546.99 },
    { x: new Date('2026-06-02'), y: 546 },
    { x: new Date('2026-06-03'), y: 548.02 },
    { x: new Date('2026-06-04'), y: 552.24 },
    { x: new Date('2026-06-05'), y: 548.99 },
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    { x: new Date('2026-06-09'), y: 548.62 },
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    { x: new Date('2026-06-18'), y: 540.03 },
    { x: new Date('2026-06-19'), y: 540.76 },
    { x: new Date('2026-06-22'), y: 540.88 },
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    { x: new Date('2026-06-24'), y: 536.51 },
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    { x: new Date('2026-07-06'), y: 540.48 },
    { x: new Date('2026-07-07'), y: 539.06 },
    { x: new Date('2026-07-08'), y: 537.78 },
    { x: new Date('2026-07-09'), y: 541.49 },
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    { x: new Date('2026-07-13'), y: 540.37 },
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    { x: new Date('2026-07-28'), y: 539.03 },
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    { x: new Date('2026-07-30'), y: 541.08 },
    { x: new Date('2026-07-31'), y: 538.42 },
    { x: new Date('2026-08-03'), y: 538.8 },
    { x: new Date('2026-08-04'), y: 541.96 },
    { x: new Date('2026-08-05'), y: 541.2 },
    { x: new Date('2026-08-06'), y: 540.91 },
    { x: new Date('2026-08-07'), y: 541.22 },
    { x: new Date('2026-08-10'), y: 537.95 },
    { x: new Date('2026-08-11'), y: 538.17 },
    { x: new Date('2026-08-12'), y: 539.72 },
    { x: new Date('2026-08-13'), y: 538.59 },
    { x: new Date('2026-08-14'), y: 537.95 },
    { x: new Date('2026-08-17'), y: 539.5 },
    { x: new Date('2026-08-18'), y: 539.59 },
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    { x: new Date('2026-08-20'), y: 539.94 },
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    { x: new Date('2026-08-24'), y: 541.34 },
    { x: new Date('2026-08-25'), y: 541.84 },
    { x: new Date('2026-08-26'), y: 539.14 },
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    { x: new Date('2026-08-28'), y: 533.56 },
    { x: new Date('2026-08-31'), y: 534.23 },
    { x: new Date('2026-09-01'), y: 531.82 },
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    { x: new Date('2026-09-03'), y: 536.14 },
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    { x: new Date('2026-09-11'), y: 531.5 },
    { x: new Date('2026-09-14'), y: 531.4 },
    { x: new Date('2026-09-15'), y: 531.4 },
    { x: new Date('2026-09-16'), y: 529.9 },
    { x: new Date('2026-09-17'), y: 532.89 },
    { x: new Date('2026-09-18'), y: 532.18 },
    { x: new Date('2026-09-21'), y: 536.24 },
    { x: new Date('2026-09-22'), y: 539.26 },
    { x: new Date('2026-09-23'), y: 532.46 },
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    { x: new Date('2026-09-25'), y: 535.4 },
    { x: new Date('2026-09-28'), y: 534.9 },
    { x: new Date('2026-09-29'), y: 535.15 },
    { x: new Date('2026-09-30'), y: 532.47 },
    { x: new Date('2026-10-01'), y: 533.21 },
    { x: new Date('2026-10-02'), y: 532.65 },
    { x: new Date('2026-10-05'), y: 531.79 },
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    { x: new Date('2026-10-07'), y: 531.04 },
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    { x: new Date('2026-10-09'), y: 533.18 },
    { x: new Date('2026-10-12'), y: 532.34 },
    { x: new Date('2026-10-13'), y: 533.16 },
    { x: new Date('2026-10-14'), y: 532.42 },
    { x: new Date('2026-10-15'), y: 534.6 },
    { x: new Date('2026-10-16'), y: 538.11 },
    { x: new Date('2026-10-19'), y: 536.92 },
    { x: new Date('2026-10-20'), y: 535.67 },
    { x: new Date('2026-10-21'), y: 536.44 },
    { x: new Date('2026-10-22'), y: 535.49 },
    { x: new Date('2026-10-23'), y: 536.148823 },
    { x: new Date('2026-10-24'), y: 535.861088 },
    { x: new Date('2026-10-25'), y: 535.861088 },
    { x: new Date('2026-10-26'), y: 535.906659 },
    { x: new Date('2026-10-27'), y: 537.897244 },
    { x: new Date('2026-10-28'), y: 537.591565 },
    { x: new Date('2026-10-29'), y: 538.229722 },
    { x: new Date('2026-10-30'), y: 537.846446 },
    { x: new Date('2026-10-31'), y: 537.354385 },
    { x: new Date('2026-11-01'), y: 537.387873 },
    { x: new Date('2026-11-02'), y: 537.326996 },
    { x: new Date('2026-11-03'), y: 537.837113 },
    { x: new Date('2026-11-04'), y: 537.356657 },
    { x: new Date('2026-11-05'), y: 539.080709 },
    { x: new Date('2026-11-06'), y: 540.602298 },
    { x: new Date('2026-11-07'), y: 539.429148 },
    { x: new Date('2026-11-08'), y: 539.453295 }];

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);