package org.dromara.demo.util;


import io.minio.*;
import io.minio.messages.DeleteError;
import io.minio.messages.DeleteObject;
import io.minio.messages.Item;
import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.commons.compress.utils.IOUtils;
import org.dromara.common.core.utils.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @description： minio工具类
 * @version
 */
@Component
public class MinioUtil {
    @Autowired
    private MinioClient minioClient;

    @Value("${minio.bucketName}")
    private String bucketName;
    /**
     * description: 判断bucket是否存在，不存在则创建
     *
     * @return: void
     */
    public void existBucket(String name) {
        try {
            boolean exists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(name).build());
            if (!exists) {
                minioClient.makeBucket(MakeBucketArgs.builder().bucket(name).build());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 创建存储bucket
     * @param bucketName 存储bucket名称
     * @return Boolean
     */
    public Boolean makeBucket(String bucketName) {
        try {
            minioClient.makeBucket(MakeBucketArgs.builder()
                .bucket(bucketName)
                .build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    /**
     * 删除存储bucket
     * @param bucketName 存储bucket名称
     * @return Boolean
     */
    public Boolean removeBucket(String bucketName) {
        try {
            minioClient.removeBucket(RemoveBucketArgs.builder()
                .bucket(bucketName)
                .build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }
    /**
     * description: 上传文件
     *
     * @param multipartFile
     * @return: java.lang.String

     */
    public List<String> uploads(MultipartFile[] multipartFile) {
        List<String> names = new ArrayList<>(multipartFile.length);
        for (MultipartFile file : multipartFile) {
            String fileName = file.getOriginalFilename();
            String[] split = fileName.split("\\.");
            if (split.length > 1) {
                fileName = split[0] + "_" + System.currentTimeMillis() + "." + split[1];
            } else {
                fileName = fileName + System.currentTimeMillis();
            }
            InputStream in = null;
            try {
                in = file.getInputStream();
                minioClient.putObject(PutObjectArgs.builder()
                    .bucket(bucketName)
                    .object(fileName)
                    .stream(in, in.available(), -1)
                    .contentType(file.getContentType())
                    .build()
                );
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
            names.add(fileName);
        }
        return names;
    }

    /**
     * 上传单个文件
     * @param multipartFile
     * @return
     */
    public String upload(MultipartFile multipartFile) {

            String fileName = multipartFile.getOriginalFilename();
            String[] split = fileName.split("\\.");
            if (split.length > 1) {
                fileName = split[0] + "_" + System.currentTimeMillis() + "." + split[1];
            } else {
                fileName = fileName + System.currentTimeMillis();
            }
            InputStream in = null;
            try {
                in = multipartFile.getInputStream();
                minioClient.putObject(PutObjectArgs.builder()
                    .bucket(bucketName)
                    .object(fileName)
                    .stream(in, in.available(), -1)
                    .contentType(multipartFile.getContentType())
                    .build()
                );
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }

        return fileName;
    }

    /**
     * description: 下载文件
     *
     * @param fileName
     * @return: org.springframework.http.ResponseEntity<byte [ ]>
     */
    public ResponseEntity<byte[]> download(String fileName) {
        ResponseEntity<byte[]> responseEntity = null;
        InputStream in = null;
        ByteArrayOutputStream out = null;
        try {
            in = minioClient.getObject(GetObjectArgs.builder().bucket(bucketName).object(fileName).build());
            out = new ByteArrayOutputStream();
            IOUtils.copy(in, out);
            //封装返回值
            byte[] bytes = out.toByteArray();
            HttpHeaders headers = new HttpHeaders();
            try {
                headers.add("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            headers.setContentLength(bytes.length);
            headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
            headers.setAccessControlExposeHeaders(Arrays.asList("*"));
            responseEntity = new ResponseEntity<byte[]>(bytes, headers, HttpStatus.OK);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return responseEntity;
    }

    /**
     * 下载文件
     *
     * @param originalName 文件路径
     */
    public InputStream downloadFile(String originalName, HttpServletResponse response) {
        try {

            InputStream file = minioClient.getObject(GetObjectArgs.builder().bucket(bucketName).object(originalName).build());
            String filename = new String(originalName.getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8);
            if (StringUtils.isNotBlank(originalName)) {
                filename = originalName;
            }
            response.setHeader("Content-Disposition", "attachment;filename=" + filename);
            ServletOutputStream servletOutputStream = response.getOutputStream();
            int len;
            byte[] buffer = new byte[1024];
            while ((len = file.read(buffer)) > 0) {
                servletOutputStream.write(buffer, 0, len);
            }
            servletOutputStream.flush();
            file.close();
            servletOutputStream.close();
            return file;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }


    /**
     * 批量删除文件对象
     * @param bucketName 存储bucket名称
     * @param objects 对象名称集合
     */
    public Iterable<Result<DeleteError>> removeObjects(String bucketName, List<String> objects) {
        List<DeleteObject> dos = objects.stream().map(e -> new DeleteObject(e)).collect(Collectors.toList());
        Iterable<Result<DeleteError>> results = minioClient.removeObjects(RemoveObjectsArgs.builder().bucket(bucketName).objects(dos).build());
        return results;
    }


}