/* SQL Chart Builder 3.0 front-end helpers (Chart.js v4) */

/* Legacy compat: cached shortcode output generated by v2.x may still reference
   the 'horizontalBar' chart type that Chart.js v4 removed. Alias it to a bar
   chart with a horizontal index axis so old inline scripts keep rendering. */
(function () {
    if (typeof Chart === 'undefined' || !Chart.registry || !Chart.BarController) return;
    try {
        Chart.registry.getController('horizontalBar');
    } catch (e) {
        var HorizontalBarController = function () {
            return Reflect.construct(Chart.BarController, arguments, HorizontalBarController);
        };
        HorizontalBarController.prototype = Object.create(Chart.BarController.prototype);
        Object.setPrototypeOf(HorizontalBarController, Chart.BarController);
        HorizontalBarController.id = 'horizontalBar';
        HorizontalBarController.defaults = Object.assign({}, Chart.BarController.defaults, { indexAxis: 'y' });
        try { Chart.register(HorizontalBarController); } catch (err) { /* noop */ }
    }
})();

/* "Force tooltips" feature: draws every value directly on the chart
   (v4 replacement of the old v2 beforeRender/Tooltip hack).
   Activated per chart via options.showAllTooltips = true. */
(function () {
    if (typeof Chart === 'undefined') return;
    Chart.register({
        id: 'gvnShowAllValues',
        afterDatasetsDraw: function (chart) {
            if (!chart.config.options || !chart.config.options.showAllTooltips) return;
            var ctx = chart.ctx;
            ctx.save();
            ctx.font = 'bold 12px sans-serif';
            ctx.textAlign = 'center';
            ctx.textBaseline = 'middle';
            chart.data.datasets.forEach(function (dataset, i) {
                var meta = chart.getDatasetMeta(i);
                if (meta.hidden) return;
                meta.data.forEach(function (element, index) {
                    var value = dataset.data[index];
                    if (value === null || typeof value === 'undefined') return;
                    if (typeof value === 'object') value = value.y;
                    var pos = element.tooltipPosition ? element.tooltipPosition() : element;
                    ctx.fillStyle = '#fff';
                    ctx.strokeStyle = 'rgba(0,0,0,0.6)';
                    ctx.lineWidth = 3;
                    ctx.strokeText(String(value), pos.x, pos.y);
                    ctx.fillText(String(value), pos.x, pos.y);
                });
            });
            ctx.restore();
        }
    });
})();

/* Datepicker for [type: date] dynamic filters */
jQuery(function ($) {
    if ($.fn.datepicker) {
        $('[data-toggle="datepicker"]').datepicker({ format: 'yyyy-mm-dd', autoHide: true });
    }
});

/* Export helpers (kept for backward compatibility with custom setups) */
function saveaspng(id) {
    var canvas = jQuery('#' + id + ' canvas, canvas#' + id).get(0);
    if (canvas && canvas.toDataURL) {
        window.open(canvas.toDataURL('image/png'));
        return;
    }
    window.open(jQuery('#' + id + ' img').attr('src'));
}

function exportcsv() {
    var csvFile = csv_title + csv_data;
    csvFile = csvFile.split('<br>').join('\n');
    var filename = 'mycsv.csv';
    var blob = new Blob([csvFile], { type: 'text/csv;charset=utf-8;' });
    var link = document.createElement('a');
    if (link.download !== undefined) {
        var url = URL.createObjectURL(blob);
        link.setAttribute('href', url);
        link.setAttribute('download', filename);
        link.style.visibility = 'hidden';
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
    }
}

/* ajax on dismissed admin notice */
jQuery(function ($) {
    $(document).on('click', '.guaven-sqlcharts-notice .notice-dismiss', function () {
        var type = $(this).closest('.guaven-sqlcharts-notice').data('notice');
        if (typeof guaven_sqlcharts_notice_dismissed === 'undefined') return;
        $.ajax(ajaxurl, {
            type: 'POST',
            data: {
                action: guaven_sqlcharts_notice_dismissed.action,
                type: type,
                nonce: guaven_sqlcharts_notice_dismissed.nonce
            }
        });
    });
});

/* Legacy no-op: v2.x cached output may call this before our plugin exists */
window.guaven_sqlcharts_show_pie_labels = window.guaven_sqlcharts_show_pie_labels || function () {};