( function( $ ) {

	var deleteIds = [];

	$( document ).ready( function () {

		var changeNotSaved          = false;
		var codesAddedSinceLastSave = 0;

		$( '#llms_voucher_add_codes' ).click(function ( e ) {
			e.preventDefault();

			var qty  = $( '#llms_voucher_add_quantity' ).val();
			var uses = $( '#llms_voucher_add_uses' ).val();
			var html = '';

			changeNotSaved = true;

			if ( $.isNumeric( qty ) && $.isNumeric( uses ) ) {
				if ( parseInt( qty ) > 0 && parseInt( uses ) > 0 ) {

					if ( qty > 50 ) {
						alert( "You can only generate 50 rows at a time" );
						return;
					}

					codesAddedSinceLastSave += parseInt( qty );

					if ( codesAddedSinceLastSave > 50 ) {
						alert( "Please save before adding any more codes, limit is 50 at a time" );
						codesAddedSinceLastSave -= parseInt( qty );
						return;
					}

					for ( var i = 1; i <= parseInt( qty ); i++ ) {
						html += '<tr>' +
							'<td></td>' +
							'<td>' +
							'<input type="text" maxlength="20" placeholder="Code" value="' + randomizeCode() + '" name="llms_voucher_code[]">' +
							'<input type="hidden" name="llms_voucher_code_id[]" value="0">' +
							'</td>' +
							'<td><span>0 / </span><input type="text" placeholder="Uses" value="' + uses + '" class="llms-voucher-uses" name="llms_voucher_uses[]"></td>' +
							'<td><a href="#" class="llms-voucher-delete">' + delete_icon + '</a></td>' +
							'</tr>';
					}
				}
			}

			$( '#llms_voucher_tbody' ).append( html );

			bindDeleteVoucherCode();
		} );

		bindDeleteVoucherCode();

		$( '#llms_voucher_tbody input' ).change( function() {
			changeNotSaved = true;
		} );

		$( "#post" ).on( 'submit', function() {
			if ( $( '#publish' ).attr( 'name' ) === 'publish' ) {
				$( '<input />' ).attr( 'type', 'hidden' )
					.attr( 'name', "publish" )
					.attr( 'value', "true" )
					.appendTo( '#post' );
			}
			return true;
		} );

		window.onbeforeunload = function() {
			return changeNotSaved ? "If you leave this page you will lose your unsaved changes." : null;
		};

		$( 'input[type=submit][name=publish], input[type=submit][name=save]' ).click( function ( e ) {
			var unique_values = {};
			var duplicate     = false;

			$( 'input[name="llms_voucher_code[]"]' ).each( function() {
				var val = $( this ).val()
				if ( ! unique_values[val] ) {
					unique_values[val] = true;
				} else {
					$( this ).css( 'background-color', 'rgba(226, 96, 73, 0.6)' );
					duplicate = true;
				}
			} );

			if ( duplicate ) {
				alert( 'Please make sure that there are no duplicate voucher codes.' );
				return false;
			}

			// If course or membership is not selected, don't allow user to save.
			if ( ! $( '#_llms_voucher_courses' ).val().length && ! $( '#_llms_voucher_membership' ).val().length ) {
				alert( 'Please select course or membership before saving.' );
				return false;
			}

			changeNotSaved = false;
			check_voucher_duplicate();
			return false;
		} );

		function bindDeleteVoucherCode() {
			$( '.llms-voucher-delete' ).unbind( 'click' );
			$( '.llms-voucher-delete' ).click( function ( e ) {
				e.preventDefault();

				var t   = $( this );
				var old = t.data( 'id' );

				changeNotSaved = true;

				if ( old ) {
					deleteIds.push( old );

					$( '#delete_ids' ).val( deleteIds.join( ',' ) );
				} else {
					codesAddedSinceLastSave--;
				}

				// remove html block
				t.closest( 'tr' ).remove();
			} );
		}
	} );

	function randomizeCode() {
		var text     = '';
		var possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

		for ( var i = 0; i < 12; i++ ) {
			text += possible.charAt( Math.floor( Math.random() * possible.length ) );
		}

		return text;
	}

	/**
	 * Check for voucher duplicates in other posts.
	 *
	 * @since Unknown
	 * @since 5.9.0 Add nonce.
	 * @since 7.1.3 Add check for empty vouchers.
	 *
	 * @return {void}
	 */
	function check_voucher_duplicate() {

		var vouchers = get_codes_from_inputs();

		if( ! vouchers.length ) {
			$( "#post" ).submit();
			return;
		}

		var data = {
			action: 'check_voucher_duplicate',
			postId: $( '#post_ID' ).val(),
			codes: vouchers,
			_ajax_nonce: window.llms.ajax_nonce,
		};

		var ajax = new Ajax( 'post', data, false );
		ajax.check_voucher_duplicate();
	}

	function get_codes_from_inputs() {
		var codes = [];
		$( 'input[name="llms_voucher_code[]"]' ).each( function() {
			codes.push( $( this ).val() );
		} );

		return codes;
	}

} )( jQuery );

function llms_on_voucher_duplicate( results ) {
	if ( results.length ) {
		for ( var i = 0; i < results.length; i++ ) {
			jQuery( 'input[value="' + results[i].code + '"]' ).css( 'background-color', 'rgba(226, 96, 73, 0.6)' );
		}
		alert( 'Please make sure that there are no duplicate voucher codes.' );
	} else {
		jQuery( "#post" ).submit();
	}
}