package com.ycl.service.oss.impl;

import com.aliyun.oss.ClientBuilderConfiguration;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.comm.Protocol;
import com.aliyun.oss.model.ObjectMetadata;
import com.ycl.service.oss.OssService;
import com.ycl.utils.ConstantPropertiesUtils;
import com.ycl.utils.common.RandomUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.UUID;

@Service
public class OssServiceImpl implements OssService {
    @Override
    public String uploadImages(MultipartFile file) {
        String endpoint = ConstantPropertiesUtils.END_POINT;
        String accessKeyId = ConstantPropertiesUtils.ACCESS_KEY_ID;
        String accessKeySecret = ConstantPropertiesUtils.ACCESS_KEY_SECRET;
        String bucketName = ConstantPropertiesUtils.BUCKET_NAME;

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        // 上传文件流
        try {
            // 获取文件的名称
            String fileName = "sczf/" + file.getOriginalFilename();
            ObjectMetadata objectMetadata = new ObjectMetadata();
            objectMetadata.setContentType(getcontentType(fileName.substring(fileName.lastIndexOf("."))));
            // 调用oss的方法实现长传
            // 第一个参数 bucketName
            // 第二个参数 上传到oss的文件路径和文件名称
            ossClient.putObject(bucketName, fileName, new ByteArrayInputStream(file.getBytes()), objectMetadata);
            // 关闭OSSClient。
            ossClient.shutdown();
            // 把上传的文件路径返回 （手动拼接）
            // 这里设置图片有效时间 我设置了30年
            Date expiration = new Date(System.currentTimeMillis() + 946080000 * 1000);
            String url = ossClient.generatePresignedUrl(bucketName, fileName, expiration).toString();

            return url;
        } catch (Exception e) {
            System.out.println("uploadImages上传图片失败：");
            // e.printStackTrace();
            return null;
        }
    }

    private byte[] readInputStream(InputStream inStream) throws Exception {
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        //创建一个Buffer字符串
        byte[] buffer = new byte[1024];
        //每次读取的字符串长度，如果为-1，代表全部读取完毕
        int len = 0;
        //使用一个输入流从buffer里把数据读取出来
        while ((len = inStream.read(buffer)) != -1) {
            //用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
            outStream.write(buffer, 0, len);
        }
        //关闭输入流
        inStream.close();
        //把outStream里的数据写入内存
        return outStream.toByteArray();
    }

    @Override
    public boolean deleteImages(String fileUrl) {
        String endpoint = ConstantPropertiesUtils.END_POINT;
        String accessKeyId = ConstantPropertiesUtils.ACCESS_KEY_ID;
        String accessKeySecret = ConstantPropertiesUtils.ACCESS_KEY_SECRET;
        String bucketName = ConstantPropertiesUtils.BUCKET_NAME;
        //创建OSSClient实例
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        String imgFile = fileUrl.replace("https://bucket-ans.oss-cn-hangzhou.aliyuncs.com/", "");
        String fileName = imgFile.substring(0, imgFile.indexOf("?"));

        // 根据BucketName,objectName删除文件
        ossClient.deleteObject(bucketName, fileName);
        ossClient.shutdown();
        return true;
    }

    @Override
    public String uploadImages(InputStream inputStream, String ext) {
        String endpoint = ConstantPropertiesUtils.END_POINT;
        String accessKeyId = ConstantPropertiesUtils.ACCESS_KEY_ID;
        String accessKeySecret = ConstantPropertiesUtils.ACCESS_KEY_SECRET;
        String bucketName = ConstantPropertiesUtils.BUCKET_NAME;

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        // 上传文件流
        try {
            // 获取文件的名称
            LocalDate date = LocalDate.now();
            DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd");
            String fileName = "sczf/" + date.format(formatter) + RandomUtils.generateRandomInt(8) + "." + ext;
            System.out.println("文件地址：" + fileName);
            ObjectMetadata objectMetadata = new ObjectMetadata();
            objectMetadata.setContentType(getcontentType(ext));
            // 调用oss的方法实现长传
            // 第一个参数 bucketName
            // 第二个参数 上传到oss的文件路径和文件名称
            ossClient.putObject(bucketName, fileName, inputStream, objectMetadata);
            // 关闭OSSClient。
            ossClient.shutdown();
            // 把上传的文件路径返回 （手动拼接）
            // 这里设置图片有效时间 我设置了30年
            Date expiration = new Date(System.currentTimeMillis() + 946080000 * 1000);
            String url = ossClient.generatePresignedUrl(bucketName, fileName, expiration).toString();
            System.out.println("oss上传成功：" + url);

            URL urlO = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) urlO.openConnection();
            conn.setRequestMethod("GET");
            conn.setConnectTimeout(10 * 1000);
            conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");

            InputStream inputStream2 = conn.getInputStream();// 通过输入流获取图片数据

            byte[] data = readInputStream(inputStream2);

            System.out.println("获取图片成功:" + url);
            return url;
        } catch (Exception e) {
            System.out.println("oss异常：" + e.getMessage());
            // e.printStackTrace();
            return this.uploadImages(inputStream, ext);
        }
    }

    public static String getcontentType(String FilenameExtension) {
        if (FilenameExtension.equalsIgnoreCase(".bmp")) {
            return "image/bmp";
        }
        if (FilenameExtension.equalsIgnoreCase(".gif")) {
            return "image/gif";
        }
        if (FilenameExtension.equalsIgnoreCase(".jpeg") ||
                FilenameExtension.equalsIgnoreCase(".jpg") ||
                FilenameExtension.equalsIgnoreCase(".png")) {
            return "image/jpg";
        }
        if (FilenameExtension.equalsIgnoreCase(".html")) {
            return "text/html";
        }
        if (FilenameExtension.equalsIgnoreCase(".txt")) {
            return "text/plain";
        }
        if (FilenameExtension.equalsIgnoreCase(".vsd")) {
            return "application/vnd.visio";
        }
        if (FilenameExtension.equalsIgnoreCase(".pptx") ||
                FilenameExtension.equalsIgnoreCase(".ppt")) {
            return "application/vnd.ms-powerpoint";
        }
        if (FilenameExtension.equalsIgnoreCase(".docx") ||
                FilenameExtension.equalsIgnoreCase(".doc")) {
            return "application/msword";
        }
        if (FilenameExtension.equalsIgnoreCase(".xml")) {
            return "text/xml";
        }
        return "image/jpg";
    }
}