<?php

class IHMPlotContextFileClass
{
	public static function parse($filePath)
	{

		if (!file_exists($filePath))
			return array("success" => false, "message" => "Cannot load plot context file");

		$doc = new DOMDocument("1.0", "UTF-8");
		$doc->preserveWhiteSpace = false;
		$doc->formatOutput = true;

		if (!$doc->load($filePath))
			return array("success" => false, "message" => "Cannot load plot context file");

		//<page>
		$pageNodes = $doc->getElementsByTagName('page');

		if ($pageNodes->length <= 0)
			return array("success" => false, "message" => "Cannot load context page node");

		$pageNode = $pageNodes->item(0);

		$isPortrait = $pageNode->getAttribute('portrait') == "true";

		$pageContext = array(
			'startTime' => $pageNode->getAttribute('startTime'),
			'stopTime'  => $pageNode->getAttribute('stopTime'),

			'superposeMode' => ($pageNode->getAttribute('superposeMode') == "true"),

			'ttName' => $pageNode->getAttribute('ttName'),
			'ttIndex' => ($pageNode->getAttribute('ttIndex') == '') ? 0 : intval($pageNode->getAttribute('ttIndex')),
			'ttNbIntervals' => ($pageNode->getAttribute('ttNbIntervals') == '') ? 0 : intval($pageNode->getAttribute('ttNbIntervals')),

			'portrait'  => $isPortrait,

			//An image rotation of 90 deg. is done after request execution if a page is in "portrait" mode

			'width'     => ($isPortrait ? intval($pageNode->getAttribute('height')) : intval($pageNode->getAttribute('width'))),
			'height'    => ($isPortrait ? intval($pageNode->getAttribute('width')) : intval($pageNode->getAttribute('height'))),

			'panels'    => array()
		);

		//<panel>
		$panelNodes = $pageNode->getElementsByTagName('panel');

		foreach ($panelNodes as $panelNode) {

			$panelContext = array(
				'id'     => $panelNode->getAttribute('id')
			);

			if ($isPortrait) {

				$panelContext['x']      = intval($panelNode->getAttribute('y'));
				$panelContext['width']  = intval($panelNode->getAttribute('height'));
				$panelContext['height'] = intval($panelNode->getAttribute('width'));
				$panelContext['y']      = $pageContext['height'] - intval($panelNode->getAttribute('x')) - $panelContext['height'];

			} else {

				$panelContext['x']      = intval($panelNode->getAttribute('x'));
				$panelContext['height'] = intval($panelNode->getAttribute('height'));
				$panelContext['y']      = $pageContext['height'] - intval($panelNode->getAttribute('y')) - $panelContext['height'];
				$panelContext['width']  = intval($panelNode->getAttribute('width'));
			}

			//Parameters
			$PARAMETERS_TAG = 'parameters';
			$parametersNodes = $panelNode->getElementsByTagName($PARAMETERS_TAG);
			$PARAMETER_TAG = 'parameter';
			if ($parametersNodes->length > 0) {
				$panelContext[$PARAMETERS_TAG] = array();
				$parametersNode = $parametersNodes->item(0);
				$items = $parametersNode->getElementsByTagName($PARAMETER_TAG);
				foreach ($items as $item) {
					$pContext = array(
						'id' => $item->getAttribute('id'),
						'MinSampling' => $item->getAttribute('MinSampling')
					);

					$panelContext[$PARAMETERS_TAG][] = $pContext;
				}
			}

			//<intervals>
			$intervalsNodes = $panelNode->getElementsByTagName('intervals');
			if ($intervalsNodes->length > 0) {
				$panelContext['intervals'] = array();

				foreach ($intervalsNodes as $intervalsNode) {
					$intervalsContext = array(
						'name' => $intervalsNode->getAttribute('name'),
						'id' => $intervalsNode->getAttribute('id'),
						'startTime' => $intervalsNode->getAttribute('startTime'),
						'stopTime'  => $intervalsNode->getAttribute('stopTime'),
						'params' => $intervalsNode->getAttribute('params')
					);

					$panelContext['intervals'][] = $intervalsContext;
				}

			}

			//<plotArea>
			$plotAreaNodes = $panelNode->getElementsByTagName('plotArea');

			if ($plotAreaNodes->length > 0) {

				$panelContext['plotArea'] = array();
				$plotAreaNode = $plotAreaNodes->item(0);

				if ($isPortrait) {

					$panelContext['plotArea']['x']      = intval($plotAreaNode->getAttribute('y'));
					$panelContext['plotArea']['width']  = intval($plotAreaNode->getAttribute('height'));
					$panelContext['plotArea']['height'] = intval($plotAreaNode->getAttribute('width'));
					$panelContext['plotArea']['y']      = $pageContext['height'] - intval($plotAreaNode->getAttribute('x')) - $panelContext['plotArea']['height'];

				} else {

					$panelContext['plotArea']['x']      = intval($plotAreaNode->getAttribute('x'));
					$panelContext['plotArea']['height'] = intval($plotAreaNode->getAttribute('height'));
					$panelContext['plotArea']['y']      = $pageContext['height'] - intval($plotAreaNode->getAttribute('y')) - $panelContext['plotArea']['height'];
					$panelContext['plotArea']['width']  = intval($plotAreaNode->getAttribute('width'));
				}

				//BG COLOR
				$panelContext['plotArea']['plotAreaBackgroundColor'] = ($plotAreaNode->getAttribute('plotAreaBackgroundColor'));

				//hasSpectro
				$panelContext['plotArea']['hasSpectro']  = ($plotAreaNode->getAttribute('hasSpectro') == "true");

				//<axis>
				$panelContext['plotArea']['axes'] = array();

				$axisNodes = $plotAreaNode->getElementsByTagName('axis');

				foreach ($axisNodes as $axisNode) {

					$axisContext = array(

						'id' => $axisNode->getAttribute('id'),
						'logarithmic' => ($axisNode->getAttribute('logarithmic') == "true"),
						'min' => floatval($axisNode->getAttribute('min')),

						'max' => floatval($axisNode->getAttribute('max')),
						'colorsList' => $axisNode->getAttribute('colorsList')

					);

					$panelContext['plotArea']['axes'][] = $axisContext;
				}
			}

			$pageContext['panels'][] = $panelContext;
		}

		$instantTimeNavNodes = $pageNode->getElementsByTagName('instantTimeNav');
		foreach($instantTimeNavNodes as $instantTimeNavNode){
			if ($instantTimeNavNode != "")
			{
				$instantTimeNavContext = array(
					'prevTime' => $instantTimeNavNode->getAttribute('prevTime'),
					'nextTime' => $instantTimeNavNode->getAttribute('nextTime'),
				);
				$pageContext['instantTimeNav']= $instantTimeNavContext;
			}
			
		}

		return array("success" => true, "page" => $pageContext);
	}
}