script.js

for (let year = 1971; year <= 2100; year++) {
    document.getElementById('bsYear').innerHTML += `<option value="${year}">${year} BS</option>`;
}

for (let year = 1914; year <= 2044; year++) {
    document.getElementById('adYear').innerHTML += `<option value="${year}">${year} AD</option>`;
}

function clearResults() {
    document.getElementById('result1').textContent = '';
    document.getElementById('error1').textContent = '';
    document.getElementById('result2').textContent = '';
    document.getElementById('error2').textContent = '';
}

function toggleConversionSection() {
    clearResults();
    const conversionType = document.getElementById('conversionType').value;
    const bsToADSection = document.getElementById('bsToADSection');
    const adToBSSection = document.getElementById('adToBSSection');

    if (conversionType === 'BStoAD') {
        bsToADSection.style.display = 'block';
        adToBSSection.style.display = 'none';
    } else if (conversionType === 'ADtoBS') {
        adToBSSection.style.display = 'block';
        bsToADSection.style.display = 'none';
    } else {
        bsToADSection.style.display = 'none';
        adToBSSection.style.display = 'none';
    }
}

async function convertBSToAD() {
    clearResults();
    const year = document.getElementById('bsYear').value;
    const month = document.getElementById('bsMonth').value;
    const day = document.getElementById('bsDay').value;

    if (!year || !month || !day) {
        document.getElementById('error1').textContent = 'Please fill in all fields.';
        return;
    }

    try {
        const response = await fetch(`https://sudhang.pythonanywhere.com/BStoAD/${year}/${month}/${day}`);
        const data = await response.json();

        if (response.ok) {
            const formattedADDate = `${data.ad_date.day}, ${getMonthName(data.ad_date.month)} ${data.ad_date.year}`;
            document.getElementById('result1').textContent = formattedADDate; 
        } else {
            document.getElementById('error1').textContent = data.error || 'An error occurred.';
        }
    } catch (error) {
        document.getElementById('error1').textContent = 'Error fetching the date. Please try again.';
        console.error('Fetch error:', error);
    }
}

async function convertADToBS() {
    clearResults();
    const year = document.getElementById('adYear').value;
    const month = document.getElementById('adMonth').value;
    const day = document.getElementById('adDay').value;

    if (!year || !month || !day) {
        document.getElementById('error2').textContent = 'Please fill in all fields.';
        return;
    }

    try {
        const response = await fetch(`https://sudhang.pythonanywhere.com/ADtoBS/${year}/${month}/${day}`);
        const data = await response.json();

        if (response.ok) {
            const formattedBSDate = `${data.bs_date.day} ${getBSMonthName(data.bs_date.month)} ${data.bs_date.year}`;
            document.getElementById('result2').textContent = formattedBSDate;
        } else {
            document.getElementById('error2').textContent = data.error || 'An error occurred.';
        }
    } catch (error) {
        document.getElementById('error2').textContent = 'Error fetching the date. Please try again.';
        console.error('Fetch error:', error);
    }
}

function getMonthName(month) {
    const monthNames = [
        "", 
        "January", "February", "March", "April", "May", "June",
        "July", "August", "September", "October", "November", "December"
    ];
    return monthNames[month];
}

function getBSMonthName(month) {
    const bsMonthNames = [
        "", 
        "Baishak", "Jestha", "Ashadh", "Shrawan", "Bhadra",
        "Ashwin", "Kartik", "Mangsir", "Poush", "Magh", "Falgun", "Chaitra"
    ];
    return bsMonthNames[month];
}