<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         DebugKit 1.0
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */

App::uses('AppHelper', 'View/Helper');
App::uses('HtmlHelper', 'View/Helper');

/**
 * Class SimpleGraphHelper
 *
 * Allows creation and display of extremely simple graphing elements
 *
 * @since         DebugKit 1.0
 */
class SimpleGraphHelper extends AppHelper {

/**
 * Helpers
 *
 * @var array
 */
	public $helpers = array('Html');

/**
 * Default settings to be applied to each Simple Graph
 *
 * Allowed options:
 *
 * - max => (int) Maximum value in the graphs
 * - width => (int)
 * - valueType => string (value, percentage)
 * - style => array
 *
 * @var array
 */
	protected $_defaultSettings = array(
		'max' => 100,
		'width' => 350,
		'valueType' => 'value',
	);

/**
 * Bar
 *
 * @param mixed $value Value to be graphed.
 * @param mixed $offset How much indentation.
 * @param array|\Graph $options Graph options.
 * @return string HTML graph.
 */
	public function bar($value, $offset, $options = array()) {
		$settings = array_merge($this->_defaultSettings, $options);
		extract($settings);

		$graphValue = ((float)$value / $max) * $width;
		$graphValue = max(round($graphValue), 1);

		if ($valueType === 'percentage') {
			$graphOffset = 0;
		} else {
			$graphOffset = ((float)$offset / $max) * $width;
			$graphOffset = round($graphOffset);
		}
		return $this->Html->div(
			'debug-kit-graph-bar',
				$this->Html->div(
					'debug-kit-graph-bar-value',
					' ',
					array(
						'style' => "margin-left: {$graphOffset}px; width: {$graphValue}px",
						'title' => __d('debug_kit', "Starting %sms into the request, taking %sms", $offset, $value),
					)
				),
			array('style' => "width: {$width}px;"),
			false
		);
	}

}
