<?php
/*
* 2007-2014 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Academic Free License (AFL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/afl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2014 PrestaShop SA
*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

if (!defined('_PS_VERSION_'))
	exit;

class GraphNvD3 extends ModuleGraphEngine
{
	private $_width;
	private $_height;
	private $_values;
	private $_legend;
	private $_titles;
	
    function __construct($type = null)
    {
		if ($type !== null)
			return parent::__construct($type);

		$this->name = 'graphnvd3';
		$this->tab = 'administration';
		$this->version = 1.1;
		$this->author = 'PrestaShop';
		$this->need_instance = 0;

		Module::__construct();
			
		$this->displayName = $this->l('NVD3 Charts');
		$this->description = '';
		$this->ps_versions_compliancy = array('min' => '1.5.6.1', 'max' => _PS_VERSION_);
    }

	function install()
	{
		return (parent::install() && $this->registerHook('GraphEngine') && $this->registerHook('actionAdminControllerSetMedia'));
	}

	public function hookActionAdminControllerSetMedia($params)
	{
		$admin_webpath = str_ireplace(_PS_ROOT_DIR_, '', _PS_ADMIN_DIR_);
		$admin_webpath = preg_replace('/^'.preg_quote(DIRECTORY_SEPARATOR, '/').'/', '', $admin_webpath);

		$this->context->controller->addJS(array(
			_PS_JS_DIR_.'vendor/d3.v3.min.js',
			__PS_BASE_URI__.$admin_webpath.'/themes/'.$this->context->employee->bo_theme.'/js/vendor/nv.d3.min.js',
		));
		$this->context->controller->addCSS(__PS_BASE_URI__.$admin_webpath.'/themes/'.$this->context->employee->bo_theme.'/css/vendor/nv.d3.css');
	}

	public static function hookGraphEngine($params, $drawer)
	{
		static $divid = 1;

		$nvd3_func = array(
			'line' => '
				nv.models.lineChart()',
			'pie' => '
				nv.models.pieChart()
					.x(function(d) { return d.label; })
					.y(function(d) { return d.value; })
					.showLabels(true)
					.showLegend(false)'
		);

		return '
		<div id="nvd3_chart_'.$divid.'" class="chart with-transitions">
			<svg style="width:'.(int)$params['width'].'px;height:'.(int)$params['height'].'px"></svg>
		</div>
		<script>
			$.ajax({
			url: "'.addslashes($drawer).'",
			dataType: "json",
			type: "GET",
			cache: false,
			headers: {"cache-control": "no-cache"},
			success: function(jsonData){
				nv.addGraph(function(){
					var chart = '.$nvd3_func[$params['type']].';

					if (jsonData.axisLabels.xAxis != null)
						chart.xAxis.axisLabel(jsonData.axisLabels.xAxis);
					if (jsonData.axisLabels.yAxis != null)
						chart.yAxis.axisLabel(jsonData.axisLabels.yAxis);

					d3.select("#nvd3_chart_'.($divid++).' svg")
						.datum(jsonData.data)
						.transition().duration(500)
						.call(chart);

					nv.utils.windowResize(chart.update);

					return chart;
				});
			}
		});
		</script>';
	}

	public function createValues($values)
	{		
		$this->_values = $values;
	}
	
	public function setSize($width, $height)
	{
		$this->_width = $width;
		$this->_height = $height;
	}
	
	public function setLegend($legend)
	{
		$this->_legend = $legend;
	}

	public function setTitles($titles)
	{
		$this->_titles = $titles;
	}

	public function draw()
	{
		$array = array(
			'axisLabels' => array('xAxis' => $this->_titles['x'], 'yAxis' => $this->_titles['y']),
			'data' => array()
		);

		if (!isset($this->_values[0]) || !is_array($this->_values[0]))
		{
			$nvd3_values = array();
			if (Tools::getValue('type') == 'pie')
			{
				foreach ($this->_values as $x => $y)
					$nvd3_values[] = array('label' => $this->_legend[$x], 'value' => $y);
				$array['data'] = $nvd3_values;
			}
			else
			{
				foreach ($this->_values as $x => $y)
					$nvd3_values[] = array('x' => $x, 'y' => $y);
				$array['data'][] = array('values' => $nvd3_values, 'key' => $this->_titles['main']);
			}
		}
		else
			foreach ($this->_values as $layer => $gross_values)
			{
				$nvd3_values = array();
				foreach ($gross_values as $x => $y)
					$nvd3_values[] = array('x' => $x, 'y' => $y);
				$array['data'][] = array('values' => $nvd3_values, 'key' => $this->_titles['main'][$layer]);
			}
		die(preg_replace('/"([0-9]+)"/', '$1', Tools::jsonEncode($array)));
	}
}