/* global jQuery */

const configs = window.gfMultiDatePickerConfig || [];

function initializeMultiDatePickers() {
	const forms = document.querySelectorAll('.gform_wrapper');

	if (!forms.length) return;

	if (typeof jQuery === 'undefined' || typeof jQuery.fn.datepicker !== 'function') {
		console.warn('jQuery UI Datepicker is not available.');
		return;
	}

	configs.forEach((config) => {
		const gfInput = document.querySelector(`#input_${config.form_id}_${config.field_id}`);
		const hiddenField = document.querySelector(
			`#input_${config.form_id}_${config.hidden_field_id}`,
		);

		if (!gfInput || !hiddenField) return;

		// Hide original input
		gfInput.style.display = 'none';

		// Check if visible input already exists to avoid duplicates
		let visibleInput = gfInput.parentNode.querySelector('.multi-date-visible');
		if (!visibleInput) {
			visibleInput = document.createElement('input');
			visibleInput.type = 'text';
			visibleInput.className = 'multi-date-visible';
			visibleInput.placeholder = 'Select dates';
			visibleInput.readOnly = true;
			gfInput.parentNode.insertBefore(visibleInput, gfInput);
		}

		// Parse dates from hidden field and set visible input value on init
		const selectedDates = new Set((hiddenField.value || '').split(', ').filter(Boolean));
		visibleInput.value = Array.from(selectedDates).join(', ');

		jQuery(gfInput).datepicker('destroy'); // remove default GF datepicker

		// Destroy any existing datepicker on visibleInput before initializing
		if (jQuery(visibleInput).hasClass('hasDatepicker')) {
			jQuery(visibleInput).datepicker('destroy');
		}

		jQuery(visibleInput).datepicker({
			dateFormat: config.date_format,
			changeMonth: true,
			changeYear: true,
			yearRange: '-0:+20',
			beforeShow: (inputElem, inst) => {
				inputElem.classList.add('multi-date-picker-initialized');

				const dpWrap = inst.dpDiv[0];
				dpWrap.classList.add(
					'gform-theme-datepicker',
					'gform-theme--orbital',
					'gform-theme--framework',
					'gform-theme--foundation',
				);

				// Prevent page reload on month nav
				setTimeout(() => {
					const widget = document.querySelector('.ui-datepicker');
					if (widget && !widget.dataset.listenerSet) {
						widget.dataset.listenerSet = 'true';
						widget.addEventListener('click', (event) => {
							const target = event.target.closest(
								'.ui-datepicker-prev, .ui-datepicker-next',
							);
							if (target) {
								event.preventDefault();
								event.stopPropagation();
							}
						});
					}
				}, 10);
			},
			beforeShowDay: (date) => {
				const dateString = jQuery.datepicker.formatDate('mm/dd/yy', date);
				const isSelected = selectedDates.has(dateString);
				return [true, isSelected ? 'ui-state-highlight' : ''];
			},
			onSelect: (dateText, inst) => {
				inst.inline = true;

				if (selectedDates.has(dateText)) {
					selectedDates.delete(dateText);
				} else {
					selectedDates.add(dateText);
				}

				const datesArray = Array.from(selectedDates);
				visibleInput.value = datesArray.join(', '); // Show all selected
				hiddenField.value = datesArray.join(', '); // Store all selected
				gfInput.value = datesArray[0] || ''; // Submit only one
			},
			onClose: (dateText, inst) => {
				inst.inline = false;
			},
		});
	});
}

// Initialize on DOM ready and every AJAX form render (e.g., validation error)
document.addEventListener('DOMContentLoaded', initializeMultiDatePickers);

jQuery(document).on('gform_post_render', function () {
	initializeMultiDatePickers();
});
;
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