<?php

namespace PhpOffice\PhpSpreadsheet\Worksheet;

/**
 * Copyright (c) 2006 - 2016 PhpSpreadsheet.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @category   PhpSpreadsheet
 *
 * @copyright  Copyright (c) 2006 - 2016 PhpSpreadsheet (https://github.com/PHPOffice/PhpSpreadsheet)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 */
class MemoryDrawing extends BaseDrawing implements \PhpOffice\PhpSpreadsheet\IComparable
{
    /* Rendering functions */
    const RENDERING_DEFAULT = 'imagepng';
    const RENDERING_PNG = 'imagepng';
    const RENDERING_GIF = 'imagegif';
    const RENDERING_JPEG = 'imagejpeg';

    /* MIME types */
    const MIMETYPE_DEFAULT = 'image/png';
    const MIMETYPE_PNG = 'image/png';
    const MIMETYPE_GIF = 'image/gif';
    const MIMETYPE_JPEG = 'image/jpeg';

    /**
     * Image resource.
     *
     * @var resource
     */
    private $imageResource;

    /**
     * Rendering function.
     *
     * @var string
     */
    private $renderingFunction;

    /**
     * Mime type.
     *
     * @var string
     */
    private $mimeType;

    /**
     * Unique name.
     *
     * @var string
     */
    private $uniqueName;

    /**
     * Create a new MemoryDrawing.
     */
    public function __construct()
    {
        // Initialise values
        $this->imageResource = null;
        $this->renderingFunction = self::RENDERING_DEFAULT;
        $this->mimeType = self::MIMETYPE_DEFAULT;
        $this->uniqueName = md5(rand(0, 9999) . time() . rand(0, 9999));

        // Initialize parent
        parent::__construct();
    }

    /**
     * Get image resource.
     *
     * @return resource
     */
    public function getImageResource()
    {
        return $this->imageResource;
    }

    /**
     * Set image resource.
     *
     * @param $value resource
     *
     * @return MemoryDrawing
     */
    public function setImageResource($value = null)
    {
        $this->imageResource = $value;

        if (!is_null($this->imageResource)) {
            // Get width/height
            $this->width = imagesx($this->imageResource);
            $this->height = imagesy($this->imageResource);
        }

        return $this;
    }

    /**
     * Get rendering function.
     *
     * @return string
     */
    public function getRenderingFunction()
    {
        return $this->renderingFunction;
    }

    /**
     * Set rendering function.
     *
     * @param string $value
     *
     * @return MemoryDrawing
     */
    public function setRenderingFunction($value = self::RENDERING_DEFAULT)
    {
        $this->renderingFunction = $value;

        return $this;
    }

    /**
     * Get mime type.
     *
     * @return string
     */
    public function getMimeType()
    {
        return $this->mimeType;
    }

    /**
     * Set mime type.
     *
     * @param string $value
     *
     * @return MemoryDrawing
     */
    public function setMimeType($value = self::MIMETYPE_DEFAULT)
    {
        $this->mimeType = $value;

        return $this;
    }

    /**
     * Get indexed filename (using image index).
     *
     * @return string
     */
    public function getIndexedFilename()
    {
        $extension = strtolower($this->getMimeType());
        $extension = explode('/', $extension);
        $extension = $extension[1];

        return $this->uniqueName . $this->getImageIndex() . '.' . $extension;
    }

    /**
     * Get hash code.
     *
     * @return string Hash code
     */
    public function getHashCode()
    {
        return md5(
            $this->renderingFunction .
            $this->mimeType .
            $this->uniqueName .
            parent::getHashCode() .
            __CLASS__
        );
    }

    /**
     * Implement PHP __clone to create a deep clone, not just a shallow copy.
     */
    public function __clone()
    {
        $vars = get_object_vars($this);
        foreach ($vars as $key => $value) {
            if (is_object($value)) {
                $this->$key = clone $value;
            } else {
                $this->$key = $value;
            }
        }
    }
}