<?php
/**
 * @copyright Copyright (c) 2013 2amigOS! Consulting Group LLC
 * @link http://2amigos.us
 * @license http://www.opensource.org/licenses/bsd-license.php New BSD License
 */

Yii::import('yiiwheels.widgets.grid.operations.WhPercentOfTypeOperation');

/**
 *
 * WhPercentOfTypeGooglePieOperation class
 *
 * Displays an chart based on jquery.easy.pie plugin
 *
* @author Antonio Ramirez <amigo.cobos@gmail.com>
 * @package YiiWheels.widgets.grid.operations
 * @uses Yiistrap.widgets.WhPercentOfTypeOperation
 */
class WhPercentOfTypeGooglePieOperation extends WhPercentOfTypeOperation
{
    /**
     * @var string $chartCssClass the class name of the layer holding the chart
     */
    public $chartCssClass = 'bootstrap-operation-google-pie-chart';

    /**
     * The options
     * @var array $chartOptions
     * @see https://google-developers.appspot.com/chart/interactive/docs/gallery/piechart
     */
    public $chartOptions = array(
        'title' => 'Google Pie Chart'
    );

    /**
     * @var array $data the configuration data of the chart
     */
    protected $data = array();

    /**
     * @see TbOperation
     * @return mixed|void
     */
    public function displaySummary()
    {
        $this->data[] = array('Label', 'Percent');

        foreach ($this->types as $type) {
            if (!isset($type['value'])) {
                $type['value'] = 0;
            }

            $this->data[] = $this->getTotal() ? array(
                $type['label'],
                (float)number_format(($type['value'] / $this->getTotal()) * 100, 1)
            ) : 0;
        }
        $data = CJavaScript::jsonEncode($this->data);
        $options = CJavaScript::jsonEncode($this->chartOptions);
        echo "<div id='{$this->id}' class='{$this->chartCssClass}' data-data='{$data}' data-options='{$options}'></div>";

        $this->registerClientScript();
    }

    /**
     * Registers required scripts
     * @see WhVisualizationChart
     */
    public function registerClientScript()
    {
        // Run chart
        $chart = Yii::createComponent(
            array(
                'class' => 'yiiwheels.widgets.google.WhVisualizationChart',
                'visualization' => 'PieChart',
                'containerId' => $this->getId(),
                'data' => $this->data,
                'options' => $this->chartOptions
            )
        );
        $chart->init();
        $chart->run();

        // create custom chart update by using the global chart variable
        $this->column->grid->componentsAfterAjaxUpdate[__CLASS__] =
            'var $el = $("#' . $this->getId() . '");var data = $el.data("data");var opts = $el.data("options");
			data = google.visualization.arrayToDataTable(data);
			' . $chart->getId() . '=new google.visualization.PieChart(document.getElementById("' . $this->getId() . '"));
			' . $chart->getId() . '.draw(data,opts);';
    }

}
