<?php

namespace app\common\service\watermark;

use app\common\service\watermark\image\Image;
use app\common\service\watermark\pdf\Pdf;

/**
 * Class WaterMarkBase
 * 生成水印
 *
 * @Author: Yeshihao
 * @DateTime: 2024/11/27 14:03
 * @package app\common\service\watermark
 */
class WaterMarkBase
{

	/**
	 * @var string
	 */
	public $error = '';

	/**
	 * @var
	 */
	public $url;

	public $water;

	public $water2;

	public $wxapp_id;

	public $type;

	public $tempDownloadFileName;

	/**
	 * WaterMarkBase constructor.
	 *
	 * @param $url //图片路径
	 * @param $water //水印内容
	 * @param $wxapp_id //wxappid
	 */
	public function __construct($url, $water, $wxapp_id, $type = 'image', $water2 = '')
	{
		$this->url      = $url;
		$this->water    = $water;
		$this->water2   = $water2;
		$this->wxapp_id = $wxapp_id;
		$this->type     = $type;
	}

	/**
	 * [waterMark]
	 *
	 * @Author: Yeshihao
	 * @DateTime: 2024/11/28 17:19
	 * @return array
	 * @throws \Mpdf\MpdfException
	 * @throws \setasign\Fpdi\PdfParser\CrossReference\CrossReferenceException
	 * @throws \setasign\Fpdi\PdfParser\PdfParserException
	 * @throws \setasign\Fpdi\PdfParser\Type\PdfTypeException
	 */
	public function waterMark()
	{
		//获取文件路径查看是否存在本地
		$filePath = $this->saveTempImage($this->wxapp_id, $this->url);
		//根据类型调用水印方法
		switch ($this->type) {
			case 'image':
				$image = new Image();
				$image->waterMark($filePath, $this->water, 1, $this->water2);
				break;
			case 'pdf':
				$pdf = new Pdf();
				$pdf->waterMark($filePath, $this->water, 1, $this->water2);
				break;
		}

		return ['file_path' => $filePath, 'file_name' => $this->tempDownloadFileName];
	}


	/**
	 * [saveTempImage]
	 * 保存临时文件
	 *
	 * @Author: Yeshihao
	 * @DateTime: 2024/11/25 14:28
	 * @param        $wxapp_id
	 * @param        $url
	 * @param string $mark
	 * @return string
	 */
	private function saveTempImage($wxapp_id, $url, $mark = 'temp')
	{
		$savePath = $this->getTempSavePath($wxapp_id, $url, $mark);
		if (file_exists($savePath)) {
			return $savePath;
		}
		$ch = curl_init($url);
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
		$img = curl_exec($ch);
		curl_close($ch);
		$fp = fopen($savePath, 'w');
		fwrite($fp, $img);
		fclose($fp);
		return $savePath;
	}


	/**
	 * 获取保存路径
	 *
	 * @param int    $wxapp_id
	 * @param string $url
	 * @param string $mark
	 * @return string
	 * @Author Mark
	 * @DateTime 2024-08-14
	 */
	private function getTempSavePath($wxapp_id, $url, $mark = 'temp'): string
	{
		$dirPath = WEB_PATH.'temp/image'.'/'.$wxapp_id;
		!is_dir($dirPath) && mkdir($dirPath, 0755, true);
		if ($this->type == 'pdf') {
			$fileName = $mark.'_'.date('YmdHis').'_'.md5($url).'.pdf';
		} else {
			$fileName = $mark.'_'.date('YmdHis').'_'.md5($url).'.png';
		}

		$savePath                   = $dirPath.'/'.$fileName;
		$this->tempDownloadFileName = $fileName;
		return $savePath;
	}


	/**
	 * gif转png
	 *
	 * @param string $path
	 * @return void
	 * @Author Mark
	 * @DateTime 2024-06-12
	 */
	private function git2png($path)
	{
		$image = imagecreatefromgif($path);
		if ($image === false) {
			return true;
		}
		// 设置PNG的背景颜色（透明度）
		$background = imagecolorallocatealpha($image, 0, 0, 0, 127);
		// 创建一个全新的真彩色图像
		$png_image = imagecreatetruecolor(imagesx($image), imagesy($image));
		// 设置透明度，以便将GIF的透明区域变成半透明的黑色
		imagefill($png_image, 0, 0, $background);
		// 如果GIF有透明区域，将其合并到新图片中
		if (imagecolortransparent($image) >= 0) {
			// 获取GIF图片的透明颜色索引
			$transparent_index = imagecolortransparent($image);
			// 获取透明颜色
			$transparent_color = imagecolorsforindex($image, $transparent_index);
			// 设置新图片的透明颜色
			$background = imagecolorallocatealpha($png_image, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue'], $transparent_color['alpha']);
			// 设置新图片的透明区域
			imagefill($png_image, 0, 0, $background);
			imagecolortransparent($png_image, $background);
		}
		// 将原始图片拷贝到新图片上
		imagecopy($png_image, $image, 0, 0, 0, 0, imagesx($image), imagesy($image));
		imagepng($png_image, $path);

		// 释放内存
		imagedestroy($image);
		imagedestroy($png_image);
	}

	/**
	 * 设置错误信息
	 *
	 * @param string $msg
	 * @return false
	 * @Author Mark
	 * @DateTime 2024-08-23
	 */
	public function setError(string $msg): bool
	{
		$this->error = $msg;
		return false;
	}

	/**
	 * 获取错误信息
	 *
	 * @return string
	 * @Author Mark
	 * @DateTime 2024-08-23
	 */
	public function getError(): string
	{
		return $this->error;
	}
}