const fullData = [
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    { x: new Date('2025-07-16'), y: 189.44 },
    { x: new Date('2025-07-17'), y: 189.81 },
    { x: new Date('2025-07-18'), y: 189.09 },
    { x: new Date('2025-07-21'), y: 189.22 },
    { x: new Date('2025-07-22'), y: 188.95 },
    { x: new Date('2025-07-23'), y: 188.59 },
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    { x: new Date('2025-07-25'), y: 188.61 },
    { x: new Date('2025-07-28'), y: 188.48 },
    { x: new Date('2025-07-29'), y: 188.21 },
    { x: new Date('2025-07-30'), y: 186.91 },
    { x: new Date('2025-07-31'), y: 188.01 },
    { x: new Date('2025-08-01'), y: 189.01 },
    { x: new Date('2025-08-04'), y: 186.93 },
    { x: new Date('2025-08-05'), y: 186.5 },
    { x: new Date('2025-08-06'), y: 186.49 },
    { x: new Date('2025-08-07'), y: 186.29 },
    { x: new Date('2025-08-08'), y: 186.2 },
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    { x: new Date('2025-08-12'), y: 185.89 },
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    { x: new Date('2025-08-19'), y: 186.52 },
    { x: new Date('2025-08-20'), y: 186.95 },
    { x: new Date('2025-08-21'), y: 186.56 },
    { x: new Date('2025-08-22'), y: 187.11 },
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    { x: new Date('2025-12-02'), y: 184.83 },
    { x: new Date('2025-12-03'), y: 184.32 },
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    { x: new Date('2025-12-25'), y: 186.71 },
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    { x: new Date('2025-12-29'), y: 186.71 },
    { x: new Date('2025-12-30'), y: 186.7 },
    { x: new Date('2025-12-31'), y: 185.55 },
    { x: new Date('2026-01-01'), y: 185.35 },
    { x: new Date('2026-01-02'), y: 185.75 },
    { x: new Date('2026-01-05'), y: 185.52 },
    { x: new Date('2026-01-06'), y: 185.89 },
    { x: new Date('2026-01-07'), y: 186.68 },
    { x: new Date('2026-01-08'), y: 186.76 },
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    { x: new Date('2026-03-06'), y: 183.89 },
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    { x: new Date('2026-03-10'), y: 183.29 },
    { x: new Date('2026-03-11'), y: 182.92 },
    { x: new Date('2026-03-12'), y: 182.82 },
    { x: new Date('2026-03-13'), y: 183.06 },
    { x: new Date('2026-03-16'), y: 184.15 },
    { x: new Date('2026-03-17'), y: 183.78 },
    { x: new Date('2026-03-18'), y: 182.33 },
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    { x: new Date('2026-03-26'), y: 179.24 },
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    { x: new Date('2026-05-21'), y: 183.4 },
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    { x: new Date('2026-05-25'), y: 186.23 },
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    { x: new Date('2026-06-01'), y: 188.12 },
    { x: new Date('2026-06-02'), y: 187.21 },
    { x: new Date('2026-06-03'), y: 187.5 },
    { x: new Date('2026-06-04'), y: 188.17 },
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    { x: new Date('2026-06-16'), y: 187.1 },
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    { x: new Date('2026-06-18'), y: 187.68 },
    { x: new Date('2026-06-19'), y: 188.5 },
    { x: new Date('2026-06-22'), y: 188.32 },
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    { x: new Date('2026-06-24'), y: 189.4 },
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    { x: new Date('2026-07-06'), y: 188.58 },
    { x: new Date('2026-07-07'), y: 189.27 },
    { x: new Date('2026-07-08'), y: 188.3 },
    { x: new Date('2026-07-09'), y: 189.49 },
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    { x: new Date('2026-07-28'), y: 188.41 },
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    { x: new Date('2026-07-30'), y: 188.96 },
    { x: new Date('2026-07-31'), y: 188.64 },
    { x: new Date('2026-08-03'), y: 188.64 },
    { x: new Date('2026-08-04'), y: 188.93 },
    { x: new Date('2026-08-05'), y: 188.5 },
    { x: new Date('2026-08-06'), y: 188.26 },
    { x: new Date('2026-08-07'), y: 187.9 },
    { x: new Date('2026-08-10'), y: 186.3 },
    { x: new Date('2026-08-11'), y: 186.87 },
    { x: new Date('2026-08-12'), y: 187.44 },
    { x: new Date('2026-08-13'), y: 187.17 },
    { x: new Date('2026-08-14'), y: 186.75 },
    { x: new Date('2026-08-17'), y: 186.44 },
    { x: new Date('2026-08-18'), y: 186.6 },
    { x: new Date('2026-08-19'), y: 186.2 },
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    { x: new Date('2026-08-21'), y: 184.85 },
    { x: new Date('2026-08-24'), y: 184.96 },
    { x: new Date('2026-08-25'), y: 185.61 },
    { x: new Date('2026-08-26'), y: 185.49 },
    { x: new Date('2026-08-27'), y: 185.46 },
    { x: new Date('2026-08-28'), y: 185.47 },
    { x: new Date('2026-08-31'), y: 186.15 },
    { x: new Date('2026-09-01'), y: 186.55 },
    { x: new Date('2026-09-02'), y: 186.95 },
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    { x: new Date('2026-09-10'), y: 183.72 },
    { x: new Date('2026-09-11'), y: 184.08 },
    { x: new Date('2026-09-14'), y: 184.62 },
    { x: new Date('2026-09-15'), y: 184.29 },
    { x: new Date('2026-09-16'), y: 184.23 },
    { x: new Date('2026-09-17'), y: 184.92 },
    { x: new Date('2026-09-18'), y: 184.87 },
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    { x: new Date('2026-09-22'), y: 186.78 },
    { x: new Date('2026-09-23'), y: 185.9 },
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    { x: new Date('2026-09-25'), y: 186.66 },
    { x: new Date('2026-09-28'), y: 187.21 },
    { x: new Date('2026-09-29'), y: 187.17 },
    { x: new Date('2026-09-30'), y: 186.23 },
    { x: new Date('2026-10-01'), y: 186.3 },
    { x: new Date('2026-10-02'), y: 185.55 },
    { x: new Date('2026-10-05'), y: 185.88 },
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    { x: new Date('2026-10-07'), y: 184.74 },
    { x: new Date('2026-10-08'), y: 184.88 },
    { x: new Date('2026-10-09'), y: 184.76 },
    { x: new Date('2026-10-12'), y: 186.9 },
    { x: new Date('2026-10-13'), y: 187.75 },
    { x: new Date('2026-10-14'), y: 188.12 },
    { x: new Date('2026-10-15'), y: 188.57 },
    { x: new Date('2026-10-16'), y: 189.6 },
    { x: new Date('2026-10-19'), y: 189.98 },
    { x: new Date('2026-10-20'), y: 189.74 },
    { x: new Date('2026-10-21'), y: 190.6 },
    { x: new Date('2026-10-22'), y: 189.68 },
    { x: new Date('2026-10-23'), y: 190.568306 },
    { x: new Date('2026-10-24'), y: 190.347642 },
    { x: new Date('2026-10-25'), y: 190.347642 },
    { x: new Date('2026-10-26'), y: 190.144404 },
    { x: new Date('2026-10-27'), y: 190.758235 },
    { x: new Date('2026-10-28'), y: 190.728202 },
    { x: new Date('2026-10-29'), y: 190.75389 },
    { x: new Date('2026-10-30'), y: 190.395415 },
    { x: new Date('2026-10-31'), y: 190.72278 },
    { x: new Date('2026-11-01'), y: 190.762035 },
    { x: new Date('2026-11-02'), y: 190.790422 },
    { x: new Date('2026-11-03'), y: 191.146497 },
    { x: new Date('2026-11-04'), y: 191.284081 },
    { x: new Date('2026-11-05'), y: 191.651453 },
    { x: new Date('2026-11-06'), y: 191.244763 },
    { x: new Date('2026-11-07'), y: 192.257643 },
    { x: new Date('2026-11-08'), y: 192.296647 }];

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);