let totalInvestment = 0;
let transactionCount = 0;

function lockInInvestment() {
    const predefinedAmounts = document.getElementById('predefined-amounts');
    const selectedAmount = parseFloat(predefinedAmounts.value);

    if (isNaN(selectedAmount) || selectedAmount <= 0) {
        alert('Please select a valid investment amount.');
        return;
    }

     // Get the current date and time in the format "DD/MM/YYYY"
    const currentDate = new Date();
    const day = currentDate.getDate().toString().padStart(2, '0');
    const month = (currentDate.getMonth() + 1).toString().padStart(2, '0');
    const year = currentDate.getFullYear();
    const transactionDateTime = `${day}/${month}/${year} ${currentDate.toLocaleTimeString()}`;

    // Add logic to handle the investment, update the portfolio, etc.
    totalInvestment += selectedAmount;

    // Add a row to the portfolio table with transaction date and time
    addPortfolioRow(`Transaction ${++transactionCount} (${transactionDateTime})`, selectedAmount);

    // Update the total portfolio amount
    updatePortfolioAmount();
}

function addPortfolioRow(investmentType, amount) {
    const portfolioTable = document.getElementById('portfolio-body');
    const newRow = portfolioTable.insertRow();
    const investmentCell = newRow.insertCell(0);
    const amountCell = newRow.insertCell(1);

    investmentCell.textContent = investmentType;
    amountCell.textContent = '$' + amount.toFixed(2);
}

function updatePortfolioAmount() {
    const portfolioAmount = document.getElementById('portfolio-amount');

    // Increment the total investment by 0.001% every 10 seconds
    setInterval(() => {
        const increasePercentage = 0.001;
        const increasedAmount = totalInvestment * (increasePercentage / 100);
        totalInvestment += increasedAmount;
        portfolioAmount.textContent = '$' + totalInvestment.toFixed(2);

        // Add animation class for a brief scale effect
        portfolioAmount.classList.add('increaseAmount');
        setTimeout(() => {
            portfolioAmount.classList.remove('increaseAmount');
        }, 300);
    }, 10000);
}

// Call the updatePortfolioAmount function to start the updating process
updatePortfolioAmount();