/**
 * HTS (High-Tech SMAs) - Combined Fast and Slow SMA Indicator
 * This indicator displays both Fast SMA and Slow SMA on the same chart
 */
const HTS_INDICATOR = {
    name: 'HTS',
    label: 'HTS (Fast & Slow SMA)',
    usesBaseData: false, // This indicator uses the chart's currently displayed data
    params: [
        { name: 'fastPeriod', type: 'number', defaultValue: 33, min: 2, label: 'Fast SMA Period' },
        { name: 'slowPeriod', type: 'number', defaultValue: 133, min: 2, label: 'Slow SMA Period' },
    ],
    calculateFull: calculateFullHTS,
};

function calculateFullHTS(data, params) {
    const fastPeriod = params.fastPeriod;
    const slowPeriod = params.slowPeriod;
    
    if (!data || data.length < Math.max(fastPeriod, slowPeriod)) {
        return {
            fastSMA: [],
            slowSMA: []
        };
    }
    
    // Calculate Fast SMA
    const fastSMA = calculateSMA(data, fastPeriod);
    
    // Calculate Slow SMA
    const slowSMA = calculateSMA(data, slowPeriod);
    
    return {
        fastSMA: fastSMA,
        slowSMA: slowSMA
    };
}

function calculateSMA(data, period) {
    if (!data || data.length < period) return [];
    
    let smaData = [];
    let sum = 0;
    
    // Calculate initial sum for the first period
    for (let i = 0; i < period; i++) {
        sum += data[i].close;
    }
    
    // Add the first SMA point
    smaData.push({ time: data[period - 1].time, value: sum / period });
    
    // Calculate remaining SMA points using sliding window
    for (let i = period; i < data.length; i++) {
        sum = sum - data[i - period].close + data[i].close;
        smaData.push({ time: data[i].time, value: sum / period });
    }
    
    return smaData;
}