$(document).ready(function() {
    // Sorting state management
    const sortState = {};

    // Function to sort articles
    function sortArticles(columnClass) {
        const $list = $('.alist');
        const $listItems = $list.children('li');

        // Determine sort direction
        if (!sortState[columnClass]) {
            sortState[columnClass] = 'asc';
        } else {
            sortState[columnClass] = (sortState[columnClass] === 'asc') ? 'desc' : 'asc';
        }

        // Sort the list items based on the text of the specified column
        $listItems.sort(function(a, b) {
            const aText = $(a).find('.' + columnClass).text().trim().toLowerCase();
            const bText = $(b).find('.' + columnClass).text().trim().toLowerCase();
            
            // Special handling for period (numeric sorting)
            if (columnClass === 'period') {
                const aNum = parseInt(aText);
                const bNum = parseInt(bText);
                return sortState[columnClass] === 'asc' 
                    ? aNum - bNum 
                    : bNum - aNum;
            }
            
            // Default alphabetical sorting
            return sortState[columnClass] === 'asc'
                ? aText.localeCompare(bText)
                : bText.localeCompare(aText);
        });

        // Detach and reappend sorted items to maintain DOM structure
        $list.empty().append($listItems);

        // Update sort direction indicators
        $('.legend li').removeClass('sort-asc sort-desc');
        $(`.legend li[data-sort="${columnClass}"]`).addClass(
            sortState[columnClass] === 'asc' ? 'sort-asc' : 'sort-desc'
        );
    }

    // Add click event to legend spans for sorting
    $('.legend li').on('click', function() {
        const columnClass = $(this).attr("data-sort");
        
        // If the column exists in the article items, sort by that column
        if ($('.alist li').first().find('.' + columnClass).length > 0) {
            sortArticles(columnClass);
        }
    });

    // Toggle content visibility
    $(".alist").on('click', 'li', function(e) {
        // Prevent sorting when clicking on content
        if (!$(e.target).closest('.legend').length) {
            // Check if click is outside content-wrapper and not on its child elements
            if (!$(e.target).closest('.content-wrapper').length) {
                const $contentWrapper = $(this).find('.content-wrapper');
                $contentWrapper.toggleClass("open");
            }
        }
    });
});