<?php

/**
 * This file is part of the CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace CodeIgniter\Images;

use CodeIgniter\Files\File;
use CodeIgniter\Images\Exceptions\ImageException;

/**
 * Encapsulation of an Image file
 */
class Image extends File
{
	/**
	 * The original image width in pixels.
	 *
	 * @var integer|float
	 */
	public $origWidth;

	/**
	 * The original image height in pixels.
	 *
	 * @var integer|float
	 */
	public $origHeight;

	/**
	 * The image type constant.
	 *
	 * @see http://php.net/manual/en/image.constants.php
	 *
	 * @var integer
	 */
	public $imageType;

	/**
	 * attributes string with size info:
	 * 'height="100" width="200"'
	 *
	 * @var string
	 */
	public $sizeStr;

	/**
	 * The image's mime type, i.e. image/jpeg
	 *
	 * @var string
	 */
	public $mime;

	/**
	 * Makes a copy of itself to the new location. If no filename is provided
	 * it will use the existing filename.
	 *
	 * @param string      $targetPath The directory to store the file in
	 * @param string|null $targetName The new name of the copied file.
	 * @param integer     $perms      File permissions to be applied after copy.
	 *
	 * @return boolean
	 */
	public function copy(string $targetPath, string $targetName = null, int $perms = 0644): bool
	{
		$targetPath = rtrim($targetPath, '/ ') . '/';

		$targetName = is_null($targetName) ? $this->getFilename() : $targetName;

		if (empty($targetName))
		{
			throw ImageException::forInvalidFile($targetName);
		}

		if (! is_dir($targetPath))
		{
			mkdir($targetPath, 0755, true);
		}

		if (! copy($this->getPathname(), "{$targetPath}{$targetName}"))
		{
			throw ImageException::forCopyError($targetPath);
		}

		chmod("{$targetPath}/{$targetName}", $perms);

		return true;
	}

	//--------------------------------------------------------------------

	/**
	 * Get image properties
	 *
	 * A helper function that gets info about the file
	 *
	 * @param boolean $return
	 *
	 * @return array|boolean
	 */
	public function getProperties(bool $return = false)
	{
		$path = $this->getPathname();

		if (! $vals = getimagesize($path))
		{
			throw ImageException::forFileNotSupported();
		}

		$types = [
			IMAGETYPE_GIF  => 'gif',
			IMAGETYPE_JPEG => 'jpeg',
			IMAGETYPE_PNG  => 'png',
			IMAGETYPE_WEBP => 'webp',
		];

		$mime = 'image/' . ($types[$vals[2]] ?? 'jpg');

		if ($return === true)
		{
			return [
				'width'      => $vals[0],
				'height'     => $vals[1],
				'image_type' => $vals[2],
				'size_str'   => $vals[3],
				'mime_type'  => $mime,
			];
		}

		$this->origWidth  = $vals[0];
		$this->origHeight = $vals[1];
		$this->imageType  = $vals[2];
		$this->sizeStr    = $vals[3];
		$this->mime       = $mime;

		return true;
	}

	//--------------------------------------------------------------------
}