<?php
// Own namespace
namespace Org\Mxchange\CoreFramework\Image;

// Import framework stuff
use Org\Mxchange\CoreFramework\Object\BaseFrameworkSystem;
use Org\Mxchange\CoreFramework\Registry\Registerable;

/**
 * A general image class
 *
 * @author		Roland Haeder <webmaster@shipsimu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2019 Core Developer Team
 * @license		GNU GPL 3.0 or any newer version
 * @link		http://www.shipsimu.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
abstract class BaseImage extends BaseFrameworkSystem implements Registerable {
	/**
	 * Image type
	 */
	private $imageType = '';

	/**
	 * Width of the image
	 */
	private $width = '';

	/**
	 * Height of the image
	 */
	private $height = '';

	/**
	 * X/Y
	 */
	private $x = '';
	private $y = '';

	/**
	 * Font size
	 */
	private $fontSize = '';

	/**
	 * Image string
	 */
	private $imageString = '';

	/**
	 * Background color in RGB
	 */
	private $backgroundColor = array(
		'red'   => '',
		'green' => '',
		'blue'  => ''
	);

	/**
	 * Foreground color in RGB
	 */
	private $foregroundColor = array(
		'red'   => '',
		'green' => '',
		'blue'  => ''
	);

	/**
	 * Current choosen color array
	 */
	private $colorMode = '';

	/**
	 * Image resource
	 */
	private $imageResource = NULL;

	/**
	 * Image name
	 */
	private $imageName = '';

	/**
	 * String name
	 */
	private $stringName = '';

	/**
	 * Groupable image strings?
	 */
	private $groupable = 'single';

	/**
	 * Protected constructor
	 *
	 * @param	$className	Name of the class
	 * @return	void
	 */
	protected function __construct ($className) {
		// Call parent constructor
		parent::__construct($className);
	}

	/**
	 * Private setter for all colors
	 *
	 * @param	$colorMode		Whether background or foreground color
	 * @param	$colorChannel	Red, green or blue channel?
	 * @param	$colorValue		Value to set
	 */
	private final function setColor ($colorMode, $colorChannel, $colorValue) {
		// Construct the eval() command
		$eval = sprintf("\$this->%s['%s'] = \"%s\";",
			$colorMode,
			$colorChannel,
			$colorValue
		);

		// Run the command
		//* DEBUG: */ echo "mode={$colorMode}, channel={$colorChannel}, value={$colorValue}<br />\n";
		eval($eval);
	}

	/**
	 * Setter for image width
	 *
	 * @param	$width	Width of the image
	 * @return	void
	 */
	public final function setWidth ($width) {
		$this->width = $width;
	}

	/**
	 * Getter for image width
	 *
	 * @return	$width	Width of the image
	 */
	public final function getWidth () {
		return $this->width;
	}

	/**
	 * Setter for image height
	 *
	 * @param	$height	Height of the image
	 * @return	void
	 */
	public final function setHeight ($height) {
		$this->height = $height;
	}

	/**
	 * Getter for image height
	 *
	 * @return	$height	Height of the image
	 */
	public final function getHeight () {
		return $this->height;
	}

	/**
	 * Finish the type handling (unused at the moment)
	 *
	 * @return	void
	 * @todo	Find something usefull for this method.
	 */
	public function finishType () {
		// Empty at the momemt
	}

	/**
	 * Prepares the class for resolution (unused at the moment)
	 *
	 * @return	void
	 * @todo	Find something usefull for this method.
	 */
	public function initResolution () {
		// Empty at the momemt
	}

	/**
	 * Finish resolution handling (unused at the moment)
	 *
	 * @return	void
	 * @todo	Find something usefull for this method.
	 */
	public function finishResolution () {
		// Empty at the momemt
	}

	/**
	 * Prepares the class for base (unused at the moment)
	 *
	 * @return	void
	 * @todo	Find something usefull for this method.
	 */
	public function initBase () {
		// Empty at the momemt
	}

	/**
	 * Finish base handling (unused at the moment)
	 *
	 * @return	void
	 * @todo	Find something usefull for this method.
	 */
	public function finishBase () {
		// Empty at the momemt
	}

	/**
	 * Prepares the class for background color
	 *
	 * @return	void
	 */
	public function initBackgroundColor () {
		$this->colorMode = 'backgroundColor';
	}

	/**
	 * Finish background color handling
	 *
	 * @return	void
	 * @todo	Find something usefull for this method.
	 */
	public function finishBackgroundColor () {
		// Empty at the moment
	}

	/**
	 * Prepares the class for foreground color
	 *
	 * @return	void
	 */
	public function initForegroundColor () {
		$this->colorMode = 'foregroundColor';
	}

	/**
	 * Finish foreground color handling
	 *
	 * @return	void
	 * @todo	Find something usefull for this method.
	 */
	public function finishForegroundColor () {
		// Empty at the moment
	}

	/**
	 * Prepares the class for string (unused at the moment)
	 *
	 * @param	$groupable	Whether this image string is groupable or single
	 * @return	void
	 * @todo	Find something usefull for this method.
	 */
	public function initImageString ($groupable = 'single') {
		$this->groupable = $groupable;
	}

	/**
	 * Finish string handling (unused at the moment)
	 *
	 * @return	void
	 * @todo	Find something usefull for this method.
	 */
	public function finishImageString () {
		// Empty at the momemt
	}

	/**
	 * Setter for red color
	 *
	 * @param	$red	Red color value
	 * @return	void
	 */
	public final function setRed ($red) {
		// Get array name
		$arrayName = $this->colorMode;

		// Set image color
		$this->setColor($arrayName, 'red', $red);
	}

	/**
	 * Setter for green color
	 *
	 * @param	$green	Green color value
	 * @return	void
	 */
	public final function setGreen ($green) {
		// Get array name
		$arrayName = $this->colorMode;

		// Set image color
		$this->setColor($arrayName, 'green', $green);
	}

	/**
	 * Setter for blue color
	 *
	 * @param	$blue	Blue color value
	 * @return	void
	 */
	public final function setBlue ($blue) {
		// Get array name
		$arrayName = $this->colorMode;

		// Set image color
		$this->setColor($arrayName, 'blue', $blue);
	}

	/**
	 * Setter for image string
	 *
	 * @param	$string		String to set in image
	 * @return	void
	 */
	public final function setString ($string) {
		$this->imageString = (string) $string;
	}

	/**
	 * Getter for image string
	 *
	 * @return	$string		String to set in image
	 */
	public final function getString () {
		return $this->imageString;
	}

	/**
	 * Setter for image type
	 *
	 * @param	$imageType		Type to set in image
	 * @return	void
	 */
	protected final function setImageType ($imageType) {
		$this->imageType = (string) $imageType;
	}

	/**
	 * Getter for image type
	 *
	 * @return	$imageType		Type to set in image
	 */
	public final function getImageType () {
		return $this->imageType;
	}

	/**
	 * Setter for image name
	 *
	 * @param	$name	Name of the image
	 * @return	void
	 */
	public final function setImageName ($name) {
		$this->imageName = (string) $name;
	}

	/**
	 * Getter for image name
	 *
	 * @return	$name	Name of the image
	 */
	public final function getImageName () {
		return $this->imageName;
	}

	/**
	 * Getter for image resource
	 *
	 * @return	$imageResource	An image resource from imagecreatetruecolor() function
	 */
	public final function getImageResource() {
		return $this->imageResource;
	}

	/**
	 * Setter for X coordinate
	 *
	 * @param	$x	X coordinate
	 * @return	void
	 */
	public final function setX ($x) {
		$this->x = $x;
	}

	/**
	 * Getter for X coordinate
	 *
	 * @return	$x	X coordinate
	 */
	public final function getX () {
		return $this->x;
	}

	/**
	 * Setter for Y coordinate
	 *
	 * @param	$y	Y coordinate
	 * @return	void
	 */
	public final function setY ($y) {
		$this->y = $y;
	}

	/**
	 * Getter for Y coordinate
	 *
	 * @return	$y	Y coordinate
	 */
	public final function getY () {
		return $this->y;
	}

	/**
	 * Setter for font size
	 *
	 * @param	$fontSize	Font size for strings
	 * @return	void
	 */
	public final function setFontSize ($fontSize) {
		$this->fontSize = $fontSize;
	}

	/**
	 * Getter for font size
	 *
	 * @return	$fontSize	Font size for strings
	 */
	public final function getFontSize () {
		return $this->fontSize;
	}

	/**
	 * Setter for string name
	 *
	 * @param	$stringName		String name to set
	 * @return	void
	 */
	public final function setStringName($stringName) {
		$this->stringName = $stringName;
	}

	/**
	 * Finish this image by producing it
	 *
	 * @return	void
	 */
	public function finishImage () {
		// Get template instance
		$templateInstance = $this->getTemplateInstance();

		// Compile width and height
		$width = $templateInstance->compileRawCode($this->getWidth());
		$height = $templateInstance->compileRawCode($this->getHeight());

		// Set both again
		$this->setWidth($width);
		$this->setHeight($height);

		// Get a image resource
		$this->imageResource = imagecreatetruecolor($width, $height);

		// Compile background colors
		$red   = $templateInstance->compileRawCode($this->backgroundColor['red']);
		$green = $templateInstance->compileRawCode($this->backgroundColor['green']);
		$blue  = $templateInstance->compileRawCode($this->backgroundColor['blue']);

		// Set all back
		$this->initBackgroundColor();
		$this->setRed($red);
		$this->setGreen($green);
		$this->setBlue($blue);

		// Get a pointer for background color
		$backColor = imagecolorallocate($this->getImageResource(), $red, $green, $blue);

		// Fill the image
		imagefill($this->getImageResource(), 0, 0, $backColor);

		// Compile foreground colors
		$red   = $templateInstance->compileRawCode($this->foregroundColor['red']);
		$green = $templateInstance->compileRawCode($this->foregroundColor['green']);
		$blue  = $templateInstance->compileRawCode($this->foregroundColor['blue']);

		// Set all fore
		$this->initForegroundColor();
		$this->setRed($red);
		$this->setGreen($green);
		$this->setBlue($blue);

		// Get a pointer for foreground color
		$foreColor = imagecolorallocate($this->getImageResource(), $red, $green, $blue);

		switch ($this->groupable) {
			case 'single': // Single image string
				// Compile image string
				$imageString = $templateInstance->compileRawCode($this->getString());

				// Set it back
				$this->setString($imageString);

				// Compile X/Y coordinates and font size
				$x    = $templateInstance->compileRawCode($this->getX());
				$y    = $templateInstance->compileRawCode($this->getY());
				$size = $templateInstance->compileRawCode($this->getFontSize());

				// Set the image string
				imagestring($this->getImageResource(), $size, $x, $y, $imageString, $foreColor);
				break;

			case 'groupable': // More than one string allowed
				// Walk through all groups
				foreach ($templateInstance->getVariableGroups() as $group => $set) {
					// Set the group
					$templateInstance->setVariableGroup($group, false);

					// Compile image string
					$imageString = $templateInstance->compileRawCode($this->getString());

					// Compile X/Y coordinates and font size
					$x    = $templateInstance->compileRawCode($this->getX());
					$y    = $templateInstance->compileRawCode($this->getY());
					$size = $templateInstance->compileRawCode($this->getFontSize());

					// Set the image string
					//* DEBUG: */ print __METHOD__.": size={$size}, x={$x}, y={$y}, string={$imageString}<br />\n";
					imagestring($this->getImageResource(), $size, $x, $y, $imageString, $foreColor);
				} // END - foreach
				break;
		}

		// You need finishing in your image class!
	}

	/**
	 * Getter for full created image content
	 *
	 * @return	$imageContent	The raw image content
	 */
	public function getContent () {
		// Get cache file name
		$cacheFile = $this->getTemplateInstance()->getImageCacheFile();

		// Open it for reading
		$fileObject = $cacheFile->openFile('r');

		// Rewind to beginning
		$fileObject->rewind();

		// Load the content
		$imageContent = $fileObject->fread($cacheFile->getSize());

		// And return it
		return $imageContent;
	}

}