<!-- Styles for the form and buttons -->
<style>
    body {
        font-family: Arial, sans-serif;
        background-color: #f0f0f0;
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
        margin: 0;
    }

    .payment-container {
        background-color: #fff;
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        max-width: 400px;
        width: 100%;
    }

    h2 {
        text-align: center;
        color: #333;
    }

    label {
        font-size: 14px;
        color: #555;
        margin-bottom: 10px;
        display: block;
    }

    input[type="number"] {
        width: 100%;
        padding: 10px;
        margin-bottom: 20px;
        border: 1px solid #ccc;
        border-radius: 5px;
        font-size: 16px;
    }

    button {
        background-color: #e2136e;
        color: white;
        padding: 10px 20px;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        width: 100%;
        font-size: 16px;
    }

    button:hover {
        background-color: #b50f53;
    }

    .info {
        text-align: center;
        font-size: 12px;
        color: #888;
        margin-top: 10px;
    }

    .error {
        color: red;
        text-align: center;
        margin-bottom: 20px;
    }
</style>

<div class="payment-container">
    <h2>bKash Payment</h2>

    <form id="bkashPaymentForm">
        <label for="amount">Enter Amount:</label>
        <input type="number" id="amount" name="amount" placeholder="Enter amount" required>

        <div id="error-message" class="error"></div>

        <button type="button" id="payWithBkashBtn">Pay with bKash</button>
    </form>

    <div class="info">
        <p>Powered by bKash</p>
    </div>
</div>

<!-- Include bKash JS library -->
<script src="https://scripts.bka.sh/versions/1.2.0-beta/bKash-checkout-sandbox.js"></script>

<script>
    let paymentID = '';

    bKash.init({
        paymentMode: 'checkout',
        paymentRequest: function () {
            const amount = document.getElementById('amount').value;
            const errorMessage = document.getElementById('error-message');

            if (amount > 0) {
                errorMessage.textContent = '';
                fetch('your_payment_initialization_url', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({ amount: amount })
                })
                .then(response => response.json())
                .then(data => {
                    paymentID = data.paymentID;
                    bKash.create().onSuccess(paymentID);
                })
                .catch(error => {
                    console.error('Error:', error);
                    errorMessage.textContent = 'Payment initialization failed. Please try again.';
                });
            } else {
                errorMessage.textContent = 'Please enter a valid amount.';
            }
        },
        onClose: function () {
            alert('Payment window closed.');
        }
    });

    document.getElementById('payWithBkashBtn').addEventListener('click', function () {
        bKash.execute();
    });
</script>