<?php





namespace Sabberworm\CSS\Value;





use Sabberworm\CSS\Parsing\ParserState;





class Color extends CSSFunction {





	public function __construct($aColor, $iLineNo = 0) {


		parent::__construct(implode('', array_keys($aColor)), $aColor, ',', $iLineNo);


	}





	public static function parse(ParserState $oParserState) {


		$aColor = array();


		if ($oParserState->comes('#')) {


			$oParserState->consume('#');


			$sValue = $oParserState->parseIdentifier(false);


			if ($oParserState->strlen($sValue) === 3) {


				$sValue = $sValue[0] . $sValue[0] . $sValue[1] . $sValue[1] . $sValue[2] . $sValue[2];


			} else if ($oParserState->strlen($sValue) === 4) {


				$sValue = $sValue[0] . $sValue[0] . $sValue[1] . $sValue[1] . $sValue[2] . $sValue[2] . $sValue[3] . $sValue[3];


			}





			if ($oParserState->strlen($sValue) === 8) {


				$aColor = array(


					'r' => new Size(intval($sValue[0] . $sValue[1], 16), null, true, $oParserState->currentLine()),


					'g' => new Size(intval($sValue[2] . $sValue[3], 16), null, true, $oParserState->currentLine()),


					'b' => new Size(intval($sValue[4] . $sValue[5], 16), null, true, $oParserState->currentLine()),


					'a' => new Size(round(self::mapRange(intval($sValue[6] . $sValue[7], 16), 0, 255, 0, 1), 2), null, true, $oParserState->currentLine())


				);


			} else {


				$aColor = array(


					'r' => new Size(intval($sValue[0] . $sValue[1], 16), null, true, $oParserState->currentLine()),


					'g' => new Size(intval($sValue[2] . $sValue[3], 16), null, true, $oParserState->currentLine()),


					'b' => new Size(intval($sValue[4] . $sValue[5], 16), null, true, $oParserState->currentLine())


				);


			}


		} else {


			$sColorMode = $oParserState->parseIdentifier(true);


			$oParserState->consumeWhiteSpace();


			$oParserState->consume('(');


			$iLength = $oParserState->strlen($sColorMode);


			for ($i = 0; $i < $iLength; ++$i) {


				$oParserState->consumeWhiteSpace();


				$aColor[$sColorMode[$i]] = Size::parse($oParserState, true);


				$oParserState->consumeWhiteSpace();


				if ($i < ($iLength - 1)) {


					$oParserState->consume(',');


				}


			}


			$oParserState->consume(')');


		}


		return new Color($aColor, $oParserState->currentLine());


	}





	private static function mapRange($fVal, $fFromMin, $fFromMax, $fToMin, $fToMax) {


		$fFromRange = $fFromMax - $fFromMin;


		$fToRange = $fToMax - $fToMin;


		$fMultiplier = $fToRange / $fFromRange;


		$fNewVal = $fVal - $fFromMin;


		$fNewVal *= $fMultiplier;


		return $fNewVal + $fToMin;


	}





	public function getColor() {


		return $this->aComponents;


	}





	public function setColor($aColor) {


		$this->setName(implode('', array_keys($aColor)));


		$this->aComponents = $aColor;


	}





	public function getColorDescription() {


		return $this->getName();


	}





	public function __toString() {


		return $this->render(new \Sabberworm\CSS\OutputFormat());


	}





	public function render(\Sabberworm\CSS\OutputFormat $oOutputFormat) {


		// Shorthand RGB color values


		if($oOutputFormat->getRGBHashNotation() && implode('', array_keys($this->aComponents)) === 'rgb') {


			$sResult = sprintf(


				'%02x%02x%02x',


				$this->aComponents['r']->getSize(),


				$this->aComponents['g']->getSize(),


				$this->aComponents['b']->getSize()


			);


			return '#'.(($sResult[0] == $sResult[1]) && ($sResult[2] == $sResult[3]) && ($sResult[4] == $sResult[5]) ? "$sResult[0]$sResult[2]$sResult[4]" : $sResult);


		}


		return parent::render($oOutputFormat);


	}


}


