/**
* Accordion-folding functionality.
*
* Markup with the appropriate classes will be automatically hidden,
* with one section opening at a time when its title is clicked.
* Use the following markup structure for accordion behavior:
*
* <div class="accordion-container">
* <div class="accordion-section open">
* <h3 class="accordion-section-title"><button type="button" aria-expanded="true" aria-controls="target-1"></button></h3>
* <div class="accordion-section-content" id="target">
* </div>
* </div>
* <div class="accordion-section">
* <h3 class="accordion-section-title"><button type="button" aria-expanded="false" aria-controls="target-2"></button></h3>
* <div class="accordion-section-content" id="target-2">
* </div>
* </div>
* <div class="accordion-section">
* <h3 class="accordion-section-title"><button type="button" aria-expanded="false" aria-controls="target-3"></button></h3>
* <div class="accordion-section-content" id="target-3">
* </div>
* </div>
* </div>
*
* Note that any appropriate tags may be used, as long as the above classes are present.
*
* @since 3.6.0
* @output wp-admin/js/accordion.js
*/

( function( $ ){

$( function () {

// Expand/Collapse accordion sections on click.
$( '.accordion-container' ).on( 'click', '.accordion-section-title button', function() {
accordionSwitch( $( this ) );
});

});

/**
* Close the current accordion section and open a new one.
*
* @param {Object} el Title element of the accordion section to toggle.
* @since 3.6.0
*/
function accordionSwitch ( el ) {
var section = el.closest( '.accordion-section' ),
container = section.closest( '.accordion-container' ),
siblings = container.find( '.open' ),
siblingsToggleControl = siblings.find( '[aria-expanded]' ).first(),
content = section.find( '.accordion-section-content' );

// This section has no content and cannot be expanded.
if ( section.hasClass( 'cannot-expand' ) ) {
return;
}

// Add a class to the container to let us know something is happening inside.
// This helps in cases such as hiding a scrollbar while animations are executing.
container.addClass( 'opening' );

if ( section.hasClass( 'open' ) ) {
section.toggleClass( 'open' );
content.toggle( true ).slideToggle( 150 );
} else {
siblingsToggleControl.attr( 'aria-expanded', 'false' );
siblings.removeClass( 'open' );
siblings.find( '.accordion-section-content' ).show().slideUp( 150 );
content.toggle( false ).slideToggle( 150 );
section.toggleClass( 'open' );
}

// We have to wait for the animations to finish.
setTimeout(function(){
container.removeClass( 'opening' );
}, 150);

// If there's an element with an aria-expanded attribute, assume it's a toggle control and toggle the aria-expanded value.
if ( el ) {
el.attr( 'aria-expanded', String( el.attr( 'aria-expanded' ) === 'false' ) );
}
}

})(jQuery);