import io.minio.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;
import java.net.URLDecoder;

/**
 * 文件上傳工具類
 */
@Slf4j
public class MinioUtil {
    private static String minioUrl;
    private static String minioName;
    private static String minioPass;
    private static String bucketName;

    public static void setMinioUrl(String minioUrl) {
        MinioUtil.minioUrl = minioUrl;
    }

    public static void setMinioName(String minioName) {
        MinioUtil.minioName = minioName;
    }

    public static void setMinioPass(String minioPass) {
        MinioUtil.minioPass = minioPass;
    }

    public static void setBucketName(String bucketName) {
        MinioUtil.bucketName = bucketName;
    }

    public static String getMinioUrl() {
        return minioUrl;
    }

    public static String getBucketName() {
        return bucketName;
    }

    private static MinioClient minioClient = null;

    /**
     * 上傳文件
     *
     * @param file
     * @return
     */
    public static String upload(MultipartFile file, String bizPath, String customBucket) {
        String file_url = "";
        //update-begin-author:wangshuai date:20201012 for: 過濾上傳文件夾名特殊字符，防止攻擊
        bizPath = StrAttackFilter.filter(bizPath);
        //update-end-author:wangshuai date:20201012 for: 過濾上傳文件夾名特殊字符，防止攻擊
        String newBucket = bucketName;
        if (oConvertUtils.isNotEmpty(customBucket)) {
            newBucket = customBucket;
        }
        InputStream stream = null;
        try {
            initMinio(minioUrl, minioName, minioPass);
            // 檢查存儲桶是否已經存在
            if (minioClient.bucketExists(BucketExistsArgs.builder().bucket(newBucket).build())) {
                log.info("Bucket already exists.");
            } else {
                // 創建一個名為ota的存儲桶
                minioClient.makeBucket(MakeBucketArgs.builder().bucket(newBucket).build());
                log.info("create a new bucket.");
            }
            stream = file.getInputStream();
            // 獲取文件名
            String orgName = file.getOriginalFilename();
            if ("".equals(orgName)) {
                orgName = file.getName();
            }
            orgName = CommonUtils.getFileName(orgName);
            String objectName = bizPath + "/" + orgName.substring(0, orgName.lastIndexOf(".")) + "_" + System.currentTimeMillis() + orgName.substring(orgName.lastIndexOf("."));

            // 使用putObject上傳一個本地文件到存儲桶中。
            if (objectName.startsWith("/")) {
                objectName = objectName.substring(1);
            }
            PutObjectArgs objectArgs = PutObjectArgs.builder().object(objectName)
                    .bucket(newBucket)
                    .contentType("application/octet-stream")
                    .stream(stream, stream.available(), -1).build();
            minioClient.putObject(objectArgs);
            file_url = minioUrl + newBucket + "/" + objectName;
        } catch (Exception e) {
            log.error(e.getMessage(), e);
        } finally {
            try {
                stream.close();
            } catch (IOException e) {
                log.error(e.getMessage(), e);
            }
        }
        return file_url;
    }

    /**
     * 文件上傳
     *
     * @param file
     * @param bizPath
     * @return
     */
    public static String upload(MultipartFile file, String bizPath) {
        return upload(file, bizPath, null);
    }

    /**
     * 獲取文件流
     *
     * @param bucketName
     * @param objectName
     * @return
     */
    public static InputStream getMinioFile(String bucketName, String objectName) {
        InputStream inputStream = null;
        try {
            initMinio(minioUrl, minioName, minioPass);
            GetObjectArgs objectArgs = GetObjectArgs.builder().object(objectName)
                    .bucket(bucketName).build();
            inputStream = minioClient.getObject(objectArgs);
        } catch (Exception e) {
            log.info("文件獲取失敗" + e.getMessage());
        }
        return inputStream;
    }

    /**
     * 刪除文件
     *
     * @param bucketName
     * @param objectName
     */
    public static void removeObject(String bucketName, String objectName) {
        try {
            initMinio(minioUrl, minioName, minioPass);
            RemoveObjectArgs objectArgs = RemoveObjectArgs.builder().object(objectName)
                    .bucket(bucketName).build();
            minioClient.removeObject(objectArgs);
        } catch (Exception e) {
            log.info("文件刪除失敗" + e.getMessage());
        }
    }

    /**
     * 獲取文件外鏈
     *
     * @param bucketName
     * @param objectName
     * @param expires
     * @return
     */
    public static String getObjectURL(String bucketName, String objectName, Integer expires) {
        initMinio(minioUrl, minioName, minioPass);
        try {
            GetPresignedObjectUrlArgs objectArgs = GetPresignedObjectUrlArgs.builder().object(objectName)
                    .bucket(bucketName)
                    .expiry(expires).build();
            String url = minioClient.getPresignedObjectUrl(objectArgs);
            return URLDecoder.decode(url, "UTF-8");
        } catch (Exception e) {
            log.info("文件路徑獲取失敗" + e.getMessage());
        }
        return null;
    }

    /**
     * 初始化客户端
     *
     * @param minioUrl
     * @param minioName
     * @param minioPass
     * @return
     */
    private static MinioClient initMinio(String minioUrl, String minioName, String minioPass) {
        if (minioClient == null) {
            try {
                minioClient = MinioClient.builder()
                        .endpoint(minioUrl)
                        .credentials(minioName, minioPass)
                        .build();
            } catch (Exception e) {
                throw new FcitDpException("minio文件上傳工具類初始化客户端異常信息:", e);
            }
        }
        return minioClient;
    }

    /**
     * 上傳文件到minio
     *
     * @param stream
     * @param relativePath
     * @return
     */
    public static String upload(InputStream stream, String relativePath) throws Exception {
        initMinio(minioUrl, minioName, minioPass);
        if (minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build())) {
            log.info("Bucket already exists.");
        } else {
            // 創建一個名為ota的存儲桶
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucketName).build());
            log.info("create a new bucket.");
        }
        PutObjectArgs objectArgs = PutObjectArgs.builder().object(relativePath)
                .bucket(bucketName)
                .contentType("application/octet-stream")
                .stream(stream, stream.available(), -1).build();
        minioClient.putObject(objectArgs);
        stream.close();
        return minioUrl + bucketName + "/" + relativePath;
    }

}