<?php
/**
 * Created by PhpStorm.
 * User: Bear
 * Date: 2019/1/22
 * Time: 下午8:27
 */

namespace app\common\service;

use app\common\constants\AppConstants;
use app\common\constants\ErrorCodeConstants;
use app\common\helper\ArrayHelper;
use app\common\library\Redis;
use Endroid\QrCode\QrCode;
use think\Config;

class ImageService extends BaseService
{
    /**
     * @var ImageService
     */
    private static $self;

    /**
     * @return $this|ImageService
     */
    public static function instance()
    {
        if (self::$self == NULL) {
            self::$self = new self();
        }

        return self::$self;
    }

    /**
     * 获取二维码
     * @param        $url
     * @param        $width
     * @param int    $margin
     * @param string $path_dir
     * @return \app\common\model\object\ReturnObject
     */
    public function getQrImage($url, $width = '164', $margin = 10, $path_dir = '')
    {
        try {
            $qrCode = new QrCode($url);
            $qrCode->setSize($width); //二维码尺寸
            $qrCode->setWriterByName('png');
            $qrCode->setEncoding('UTF-8');
            $qrCode->setMargin($margin);
            $tmpFile = AppConstants::getTmpFilePath($path_dir);
            $qrCode->writeFile($tmpFile);
            return $this->setData($tmpFile)->getReturn();
        } catch (\Exception $e) {
            return $this->setCode(ErrorCodeConstants::EXCEPTION)->setMsg($e->getMessage())->getReturn();
        }
    }

    /**
     * @param        $width
     * @param        $height
     * @return \app\common\model\object\ReturnObject
     */
    public function getBackGroundImage($width, $height)
    {
        try {
            $image = imagecreatetruecolor($width, $height);
            $background = imagecolorallocate($image, 255, 255, 255);
            imagefill($image,0,0,$background);
            return $this->setData($image)->getReturn();
        } catch (\Exception $e) {
            return $this->setCode(ErrorCodeConstants::EXCEPTION)->setMsg($e->getMessage())->getReturn();
        }
    }

    public function setImageText($image, $content, $font_size = 5, $x = 0, $y = 0)
    {
        try {
            $color = imagecolorallocate($image, 255, 0, 0);

            $font_file = ROOT_PATH . 'public/assets/fonts/ht.ttf';
            imagettftext($image, $font_size, 0, $x, $y, $color, $font_file, $content);

            return $this->setData($image)->getReturn();
        } catch (\Exception $e) {
            return $this->setCode(ErrorCodeConstants::EXCEPTION)->setMsg($e->getMessage())->getReturn();
        }
    }

    /**
     * 获取文字行
     * @param $line
     * @return \app\common\model\object\ReturnObject
     */
    public function getLine($line)
    {
        $list = [];
        if (mb_strlen($line) > 16) {
            $list[] = mb_substr($line, 0, 16);
            $left = mb_substr($line, 16);
            if (mb_strlen($left) > 16) {
                $list[] = mb_substr($left, 0, 10) . "....";
            } else {
                $list[] = $left;
            }
        } else {
            $list[] = $line;
        }

        return $this->setData($list)->getReturn();
    }

    /**
     * 获取推广链接图
     * @param $id
     * @param $channel_id
     * @return \app\common\model\object\ReturnObject
     */
    public function getReferralImage($id, $channel_id)
    {
        $referral = ReferralService::instance()->getReferralModel()->where('id', '=', $id)->find();
        if (!$referral) {
            return $this->setCode(ErrorCodeConstants::PERMISSION_DENY)->getReturn();
        }
        $cache = 'QRIMAGE:' . $id;
        if ($path = Redis::instance()->get($cache)) {
            return $this->setData($path)->getReturn();
        }

        $jmp_url = getCurrentDomain($channel_id, '/t/' . $id);
        $mergeImage = ImageService::instance()->getMergeImage($jmp_url, $referral->getData("share_title"));
        if ($mergeImage->code == ErrorCodeConstants::SUCCESS) {
            Redis::instance()->set($cache, $mergeImage->data, 600);
        }
        return $mergeImage;
    }

    /**
     * 生成大图
     * @param $url
     * @param $content
     * @return \app\common\model\object\ReturnObject
     */
    public function getMergeImage($url, $content)
    {
        $returnQrcode = ImageService::instance()->getQrImage($url, 110, 0);
        $qrImage = imagecreatefrompng($returnQrcode->data);
        $cover = ResourceService::instance()->getRandomCover();
        $filename = $cover->data;
        $fileInfo = pathinfo($filename);
        $extension = ArrayHelper::arrayGet($fileInfo, 'extension');
        switch ($extension) {
            case 'png':
                $coverImage = imagecreatefrompng($filename);
                break;
            case 'jpg':
            case 'jpeg':
                $coverImage = imagecreatefromjpeg($filename);
                break;
            default:
                return $this->setCode(ErrorCodeConstants::PARAMS_ERROR_INVALID)->setMsg("只支持JPEG,PNG图片")->getReturn();
        }
        list($width, $height) = getimagesize($filename);
        $return = ImageService::instance()->getBackGroundImage(500, 469);
        $bgImage = $return->data;
        imagecopyresampled($bgImage, $qrImage, 6, 346, 0, 0, 110, 110, 110, 110);
        $color = imagecolorallocate($bgImage, 255, 0, 0);
        $font_file = ROOT_PATH . 'public/assets/fonts/weiruanyahei.ttf';
        $lines = $this->getLine($content)->data;
        foreach ($lines as $index => $line) {
            $offsetY = 365 + $index * 30;
            imagettftext($bgImage, 16, 0, 131, $offsetY, $color, $font_file, $line);
        }

        $color = imagecolorallocate($bgImage, 121, 121, 121);
        imagettftext($bgImage, 13, 0, 131, 445, $color, $font_file, "长按识别二维码查看精彩内容");

        imagecopyresampled($bgImage, $coverImage, 0, 0, 0, 0, 500, 313, $width, $height);
        $uploadPath = AppConstants::getUploadQrPath();
        imagepng($bgImage, $uploadPath, 9);
        imagedestroy($bgImage);
        imagedestroy($qrImage);
        imagedestroy($coverImage);
        $url = AppConstants::getPublicUrl($uploadPath);
        return $this->setData($url)->getReturn();
    }
}