<!--PAYPAL-->
<div id="smart-button-container" class="form">
	<p id="invoiceidError" class="description">Please enter an Invoice ID</p>
	<p id="descriptionError" class="description">Please enter a description</p>
	<p id="priceLabelError" class="description">Please enter a price</p>

	<div id="invoiceidDiv"><label for="invoiceid">Invoice ID</label>
		<input name="invoiceid" maxlength="127" type="text" id="invoiceid" value="<?php echo $_GET['invoice'] ?? ''; ?> ">
	</div>

	<div><label for="description">Description of services </label>
		<input type="text" name="descriptionInput" id="description" maxlength="127" value="<?php echo $_GET['desc'] ?? ''; ?> ">
	</div>
	<div><label for="amount">Amount (USD)</label>
		<input name="amountInput" type="number" id="amount" value="<?php echo $_GET['amount'] ?? ''; ?>">
	</div>
	<div style="text-align: center; margin-top: 0.625rem;" id="paypal-button-container"></div>
</div>

<script src="https://www.paypal.com/sdk/js?client-id=sb&enable-funding=venmo&currency=USD" data-sdk-integration-source="button-factory"></script>

<script>
	function initPayPalButton() {
		var description = document.querySelector('#smart-button-container #description');
		var amount = document.querySelector('#smart-button-container #amount');
		var descriptionError = document.querySelector('#smart-button-container #descriptionError');
		var priceError = document.querySelector('#smart-button-container #priceLabelError');
		var invoiceid = document.querySelector('#smart-button-container #invoiceid');
		var invoiceidError = document.querySelector('#smart-button-container #invoiceidError');
		var invoiceidDiv = document.querySelector('#smart-button-container #invoiceidDiv');

		var elArr = [description, amount];

		if (invoiceidDiv.firstChild.innerHTML.length > 1) {
			invoiceidDiv.style.display = "block";
		}

		var purchase_units = [];
		purchase_units[0] = {};
		purchase_units[0].amount = {};

		function validate(event) {
			return event.value.length > 0;
		}

		//		var result = elArr.every(validate);
		//		if (result) {
		//			actions.enable();
		//		}

		paypal.Buttons({
			style: {
				color: 'white',
				shape: 'pill',
				label: 'pay',
				layout: 'horizontal',

			},

			onInit: function(data, actions) {
				actions.disable();

				if (invoiceidDiv.style.display === "block") {
					elArr.push(invoiceid);
				}

				elArr.forEach(function(item) {
					item.addEventListener('keyup', function(event) {
						var result = elArr.every(validate);
						if (result) {
							actions.enable();
						} else {
							actions.disable();
						}
					});
				});
			},

			onClick: function() {
				if (description.value.length < 1) {
					descriptionError.style.display = "block";
				} else {
					descriptionError.style.display = "none";
				}

				if (amount.value.length < 1) {
					priceError.style.display = "block";
				} else {
					priceError.style.display = "none";
				}

				if (invoiceid.value.length < 1 && invoiceidDiv.style.display === "block") {
					invoiceidError.style.display = "block";
				} else {
					invoiceidError.style.display = "none";
				}

				purchase_units[0].description = description.value;
				purchase_units[0].amount.value = amount.value;

				if (invoiceid.value !== '') {
					purchase_units[0].invoice_id = invoiceid.value;
				}
			},

			createOrder: function(data, actions) {
				return actions.order.create({
					purchase_units: purchase_units,
				});
			},

			onApprove: function(data, actions) {
				return actions.order.capture().then(function(orderData) {

					// Full available details
					console.log('Capture result', orderData, JSON.stringify(orderData, null, 2));

					// Show a success message within this page, e.g.
					const element = document.getElementById('paypal-button-container');
					element.innerHTML = '';
					element.innerHTML = '<h3>Thank you for your payment!</h3>';

					// Or go to another URL:  actions.redirect('thank_you.html');

				});
			},

			onError: function(err) {
				console.log(err);
			}
		}).render('#paypal-button-container');
	}
	initPayPalButton();
</script>