/*
 * Filter feature matrix
 */
$(document).ready(function(){
    // Show/hide column based on whether supplied checkbox is checked.
    function filter_version(checkbox)
    {
        var total_checked = $('form#featurematrix_version_filter .featurematrix_version:checked').length;
        var column=$("table tr:first th").index($("table tr:first th:contains('" + checkbox.val() + "')")) + 1;
        if (total_checked) {
            $('.feature-version-col').css('width', (70 / total_checked) + '%');
        }
        $("table th:nth-child(" + column + "), table td:nth-child(" + column + ")").toggle(checkbox.is(":checked")).toggleClass('hidden');
        hide_unchanged();
        // Lastly, if at this point an entire row is obsolete, then hide
        $('tbody tr').each(function(i, el) {
            var $tr = $(el),
                visible_count = $tr.find('td:not(.hidden)').length,
                obsolete_count = $tr.find('td.fm_obs:not(.hidden)').length;
            // if visible count matches obsolete count, then hide this row
            $tr.toggle(visible_count !== obsolete_count);
        });
    }

    // Show/hide rows if all values are the same in displayed cells
    function hide_unchanged()
    {
        var hide_unchanged=$('form#featurematrix_version_filter input#hide_unchanged').is(':checked');
        $('table tr').has('td').each(function(){
            var row_values=$(this).children('td').not('.colFirst, .hidden');
            var yes_count=row_values.filter(":contains('Yes')").length;
            var no_count=row_values.filter(":contains('No')").length;
            var obsolete_count=row_values.filter(":contains('Obsolete')").length;
            $(this).toggle(hide_unchanged == false || (yes_count != row_values.length && no_count != row_values.length && obsolete_count != row_values.length));
        });
    }

    // Upon loading the page, apply the filter based on EOL versions that are
    // unchecked.
    $('form#featurematrix_version_filter input.featurematrix_version').not(':checked').each(function(){
        filter_version($(this));
    });

    // Apply filter based on change in check status of clicked version filter.
    $('form#featurematrix_version_filter input.featurematrix_version').on("change", function(){
        filter_version($(this));
    });

    // Show/hide unchanged feature rows when checkbox clicked.
    $('form#featurematrix_version_filter input#hide_unchanged').on("change", function(){
        hide_unchanged();
    });
});