const fullData = [
    { x: new Date('2025-04-09'), y: 11886.01 },
    { x: new Date('2025-04-10'), y: 11924.29 },
    { x: new Date('2025-04-11'), y: 12009.93 },
    { x: new Date('2025-04-12'), y: 12085.71 },
    { x: new Date('2025-04-13'), y: 12094.27 },
    { x: new Date('2025-04-14'), y: 12105.66 },
    { x: new Date('2025-04-15'), y: 12076.38 },
    { x: new Date('2025-04-16'), y: 12082.23 },
    { x: new Date('2025-04-17'), y: 12090.97 },
    { x: new Date('2025-04-18'), y: 12162.75 },
    { x: new Date('2025-04-19'), y: 12148.86 },
    { x: new Date('2025-04-20'), y: 12149.93 },
    { x: new Date('2025-04-21'), y: 12171.87 },
    { x: new Date('2025-04-22'), y: 12171.32 },
    { x: new Date('2025-04-23'), y: 12185.69 },
    { x: new Date('2025-04-24'), y: 12183.76 },
    { x: new Date('2025-04-26'), y: 12154.52 },
    { x: new Date('2025-04-27'), y: 12153.76 },
    { x: new Date('2025-04-28'), y: 12143.24 },
    { x: new Date('2025-05-02'), y: 12015.55 },
    { x: new Date('2025-05-05'), y: 11898.78 },
    { x: new Date('2025-05-06'), y: 11898.78 },
    { x: new Date('2025-05-08'), y: 11918.20 },
    { x: new Date('2025-05-09'), y: 11879.30 },
    { x: new Date('2025-05-10'), y: 11882.67 },
    { x: new Date('2025-05-11'), y: 11880.01 },
    { x: new Date('2025-05-12'), y: 11872.89 },
    { x: new Date('2025-05-13'), y: 11823.58 },
    { x: new Date('2025-05-14'), y: 11818.41 },
    { x: new Date('2025-05-15'), y: 11873.71 },
    { x: new Date('2025-05-16'), y: 11803.48 },
    { x: new Date('2025-05-17'), y: 11766.78 },
    { x: new Date('2025-05-19'), y: 11784.13 },
    { x: new Date('2025-05-20'), y: 11781.82 },
    { x: new Date('2025-05-21'), y: 11780.23 },
    { x: new Date('2025-05-22'), y: 11783.78 },
    { x: new Date('2025-05-24'), y: 11777.00 },
    { x: new Date('2025-05-26'), y: 11750.51 },
    { x: new Date('2025-05-27'), y: 11803.86 },
    { x: new Date('2025-06-04'), y: 11883.89 },
    { x: new Date('2025-06-05'), y: 11902.19 },
    { x: new Date('2025-06-06'), y: 11907.20 },
    { x: new Date('2025-06-07'), y: 11896.63 },
    { x: new Date('2025-06-08'), y: 11897.37 },
    { x: new Date('2025-06-10'), y: 11894.19 },
    { x: new Date('2025-06-11'), y: 11892.79 },
    { x: new Date('2025-06-12'), y: 11896.93 },
    { x: new Date('2025-06-13'), y: 11911.50 },
    { x: new Date('2025-06-14'), y: 12003.89 },
    { x: new Date('2025-06-15'), y: 11993.42 },
    { x: new Date('2025-06-16'), y: 11989.26 },
    { x: new Date('2025-06-17'), y: 12009.44 },
    { x: new Date('2025-06-18'), y: 11927.87 },
    { x: new Date('2025-06-20'), y: 11940.51 },
    { x: new Date('2025-06-21'), y: 11937.41 },
    { x: new Date('2025-06-22'), y: 11939.95 },
    { x: new Date('2025-06-23'), y: 11935.41 },
    { x: new Date('2025-06-24'), y: 12005.33 },
    { x: new Date('2025-06-25'), y: 11910.11 },
    { x: new Date('2025-06-26'), y: 11885.25 },
    { x: new Date('2025-06-27'), y: 11878.23 },
    { x: new Date('2025-06-28'), y: 11869.27 },
    { x: new Date('2025-06-29'), y: 11868.70 },
    { x: new Date('2025-06-30'), y: 11856.60 },
    { x: new Date('2025-07-01'), y: 11897.92 },
    { x: new Date('2025-07-02'), y: 11889.01 },
    { x: new Date('2025-07-04'), y: 11921.63 },
    { x: new Date('2025-07-05'), y: 11905.75 },
    { x: new Date('2025-07-06'), y: 11907.35 },
    { x: new Date('2025-07-07'), y: 11899.60 },
    { x: new Date('2025-07-08'), y: 11887.38 },
    { x: new Date('2025-07-09'), y: 11888.34 },
    { x: new Date('2025-07-10'), y: 11877.51 },
    { x: new Date('2025-07-12'), y: 11862.97 },
    { x: new Date('2025-07-13'), y: 11854.67 },
    { x: new Date('2025-07-14'), y: 11854.80 },
    { x: new Date('2025-07-16'), y: 11876.78 },
    { x: new Date('2025-07-17'), y: 11887.43 },
    { x: new Date('2025-07-19'), y: 11882.83 },
    { x: new Date('2025-07-20'), y: 11879.88 },
    { x: new Date('2025-07-21'), y: 11871.28 },
    { x: new Date('2025-07-22'), y: 11908.86 },
    { x: new Date('2025-07-23'), y: 11940.93 },
    { x: new Date('2025-07-24'), y: 11960.93 },
    { x: new Date('2025-07-25'), y: 11940.19 },
    { x: new Date('2025-07-26'), y: 11915.74 },
    { x: new Date('2025-07-27'), y: 11921.32 },
    { x: new Date('2025-07-29'), y: 11907.88 },
    { x: new Date('2025-07-30'), y: 11910.56 },
    { x: new Date('2025-07-31'), y: 11886.16 },
    { x: new Date('2025-08-01'), y: 11900.04 },
    { x: new Date('2025-08-02'), y: 11917.40 },
    { x: new Date('2025-08-03'), y: 11913.53 },
    { x: new Date('2025-08-04'), y: 11940.73 },
    { x: new Date('2025-08-05'), y: 11891.36 },
    { x: new Date('2025-08-06'), y: 11890.14 },
    { x: new Date('2025-08-07'), y: 11897.76 },
    { x: new Date('2025-08-08'), y: 11877.18 },
    { x: new Date('2025-08-09'), y: 11867.62 },
    { x: new Date('2025-08-10'), y: 11861.80 },
    { x: new Date('2025-08-11'), y: 11842.74 },
    { x: new Date('2025-08-12'), y: 11801.74 },
    { x: new Date('2025-08-13'), y: 11802.82 },
    { x: new Date('2025-08-14'), y: 11742.68 },
    { x: new Date('2025-08-15'), y: 11676.43 },
    { x: new Date('2025-08-16'), y: 11686.99 },
    { x: new Date('2025-08-18'), y: 11699.84 },
    { x: new Date('2025-08-19'), y: 11737.85 },
    { x: new Date('2025-08-20'), y: 11748.18 },
    { x: new Date('2025-08-21'), y: 11741.54 },
    { x: new Date('2025-08-22'), y: 11741.84 },
    { x: new Date('2025-08-23'), y: 11778.54 },
    { x: new Date('2025-08-24'), y: 11774.67 },
    { x: new Date('2025-08-25'), y: 11798.60 },
    { x: new Date('2025-08-26'), y: 11748.83 },
    { x: new Date('2025-08-27'), y: 11775.15 },
    { x: new Date('2025-08-28'), y: 11871.25 },
    { x: new Date('2025-08-29'), y: 11882.64 },
    { x: new Date('2025-08-30'), y: 12012.48 },
    { x: new Date('2025-08-31'), y: 12003.91 }];

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);