package com.artfess.file.util;

import com.artfess.base.util.CommonUtil;
import com.artfess.base.util.StringUtil;
import io.minio.MinioClient;
import io.minio.ObjectStat;
import io.minio.errors.InvalidEndpointException;
import io.minio.errors.InvalidPortException;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.multipart.MultipartFile;

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

/**
 * minio文件上传工具类
 */
@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;

    /**
     * 上传文件
     *
     * @param file         文件
     * @param bizPath      路径
     * @param fileName     文件名称
     * @param customBucket 桶名
     * @return 相对路径
     */
    public static String uploadRelative(MultipartFile file, String bizPath, String fileName, String customBucket) throws Exception {
        String file_url = "";
        String newBucket = bucketName;
        if (StringUtil.isNotEmpty(customBucket)) {
            newBucket = customBucket;
        }

        initMinio(minioUrl, minioName, minioPass);
        // 检查存储桶是否已经存在
        if (minioClient.bucketExists(newBucket)) {
            log.info("Bucket already exists.");
        } else {
            // 创建一个名为ota的存储桶
            minioClient.makeBucket(newBucket);
            log.info("create a new bucket as 【" + newBucket + "】！");
        }
        InputStream stream = file.getInputStream();
        // 获取文件名
        String objectName = "";
        if (StringUtils.isEmpty(fileName)) {
            String orgName = file.getOriginalFilename();
            orgName = CommonUtil.getFileName(orgName);
            if (!bizPath.endsWith("/")) {
                bizPath = bizPath.concat("/");
            }
            objectName = bizPath + orgName.substring(0, orgName.lastIndexOf(".")) + "_" + System.currentTimeMillis() + orgName.substring(orgName.indexOf("."));
        } else {
            if (fileName.startsWith("/")) {
                fileName = fileName.substring(1);
            }
            if (!bizPath.endsWith("/")) {
                bizPath = bizPath.concat("/");
            }
            objectName = bizPath + fileName;
        }
        if (objectName.startsWith("/")) {
            objectName = objectName.substring(1);
        }
        // 使用putObject上传一个本地文件到存储桶中。
        minioClient.putObject(newBucket, objectName, stream, stream.available(), "application/octet-stream");
        stream.close();
        if (!minioUrl.endsWith("/")) {
            minioUrl = minioUrl.concat("/");
        }
        if (!newBucket.endsWith("/")) {
            newBucket = newBucket.concat("/");
        }
        if (newBucket.startsWith("/")) {
            newBucket = newBucket.substring(1);
        }
        file_url = newBucket + objectName;

        return file_url;
    }

    /**
     * 上传文件
     *
     * @param file         文件
     * @param bizPath      路径
     * @param fileName     文件名称
     * @param customBucket 桶名
     * @return 文件全路径
     */
    public static String upload(MultipartFile file, String bizPath, String fileName, String customBucket) throws Exception {
        String file_url = "";
        String newBucket = bucketName;
        if (StringUtil.isNotEmpty(customBucket)) {
            newBucket = customBucket;
        }

        initMinio(minioUrl, minioName, minioPass);
        // 检查存储桶是否已经存在
        if (minioClient.bucketExists(newBucket)) {
            log.info("Bucket already exists.");
        } else {
            // 创建一个名为ota的存储桶
            minioClient.makeBucket(newBucket);
            log.info("create a new bucket as 【" + newBucket + "】！");
        }
        InputStream stream = file.getInputStream();
        // 获取文件名
        String objectName = "";
        if (StringUtils.isEmpty(fileName)) {
            String orgName = file.getOriginalFilename();
            orgName = CommonUtil.getFileName(orgName);
            if (!bizPath.endsWith("/")) {
                bizPath = bizPath.concat("/");
            }
            objectName = bizPath + orgName.substring(0, orgName.lastIndexOf(".")) + "_" + System.currentTimeMillis() + orgName.substring(orgName.indexOf("."));
        } else {
            if (fileName.startsWith("/")) {
                fileName = fileName.substring(1);
            }
            if (!bizPath.endsWith("/")) {
                bizPath = bizPath.concat("/");
            }
            objectName = bizPath + fileName;
        }
        if (objectName.startsWith("/")) {
            objectName = objectName.substring(1);
        }
        // 使用putObject上传一个本地文件到存储桶中。
        minioClient.putObject(newBucket, objectName, stream, stream.available(), "application/octet-stream");
        stream.close();
        if (!minioUrl.endsWith("/")) {
            minioUrl = minioUrl.concat("/");
        }
        if (!newBucket.endsWith("/")) {
            newBucket = newBucket.concat("/");
        }
        if (newBucket.startsWith("/")) {
            newBucket = newBucket.substring(1);
        }
        file_url = minioUrl + newBucket + objectName;

        return file_url;
    }

    /**
     * 上传文件流到minio
     *
     * @param stream       文件流
     * @param relativePath (带文件名的路径)
     * @param customBucket 桶名
     * @return 文件全路径
     */
    public static String uploadByInputStream(InputStream stream, String relativePath, String customBucket) throws Exception {
        String newBucket = bucketName;
        if (StringUtil.isNotEmpty(customBucket)) {
            newBucket = customBucket;
        }

        initMinio(minioUrl, minioName, minioPass);
        if (minioClient.bucketExists(newBucket)) {
            log.info("Bucket already exists.");
        } else {
            // 创建一个名为ota的存储桶
            minioClient.makeBucket(newBucket);
            log.info("create a new bucket as 【" + newBucket + "】！");
        }
        minioClient.putObject(newBucket, relativePath, stream, stream.available(), "application/octet-stream");
        stream.close();

        return minioUrl + newBucket + "/" + relativePath;
    }

    /**
     * 上传文件流到minio
     *
     * @param stream       文件流
     * @param relativePath (带文件名的路径)
     * @return 文件全路径
     */
    public static String uploadByInputStream(InputStream stream, String relativePath) throws Exception{
        return uploadByInputStream(stream, relativePath, bucketName);
    }

    /**
     * 文件上传
     *
     * @param file    文件
     * @param bizPath 上传路径
     * @return 文件全路径
     */
    public static String upload(MultipartFile file, String bizPath) throws Exception {
        return upload(file, bizPath, null, null);
    }

    /**
     * 文件上传
     *
     * @param file     文件
     * @param bizPath  上传路径
     * @param fileName 文件名称
     * @return 文件全路径
     */
    public static String upload(MultipartFile file, String bizPath, String fileName) throws Exception {
        return upload(file, bizPath, fileName, null);
    }

    /**
     * 获取文件流
     *
     * @param customBucket 桶名
     * @param fileName     文件名（相对路径）
     * @param isRelative   是否相对路径
     * @return
     */
    public static InputStream getMinioFile(String customBucket, String fileName, boolean isRelative) {
        InputStream inputStream = null;
        try {
            initMinio(minioUrl, minioName, minioPass);
            String newBucket = bucketName;
            if (StringUtil.isNotEmpty(customBucket)) {
                newBucket = customBucket;
            }
            if (!isRelative) {
                fileName = fileName.replace(minioUrl, "");
                fileName = fileName.replace(newBucket, "");
            }
            inputStream = minioClient.getObject(newBucket, fileName);
        } catch (Exception e) {
            log.error("文件获取失败" + e.getMessage());
        }
        return inputStream;
    }

    /**
     * 获取文件流
     *
     * @param fileName   文件路径
     * @param isRelative 是否相对路径
     * @return
     */
    public static InputStream getMinioFile(String fileName, boolean isRelative) {
        return getMinioFile(bucketName, fileName, isRelative);
    }

    /**
     * 删除文件
     *
     * @param customBucket 桶名
     * @param fileName     文件名（相对路径）
     * @param isRelative   是否相对路径
     * @throws Exception
     */
    public static void removeObject(String customBucket, String fileName, boolean isRelative) {
        try {
            initMinio(minioUrl, minioName, minioPass);
            String newBucket = bucketName;
            if (StringUtil.isNotEmpty(customBucket)) {
                newBucket = customBucket;
            }
            if (!isRelative) {
                if (!minioUrl.endsWith("/")) {
                    minioUrl = minioUrl.concat("/");
                }
                if (newBucket.startsWith("/")) {
                    newBucket = newBucket.substring(1);
                }
                fileName = fileName.replace(minioUrl + newBucket, "");
            }
            ObjectStat objectStat = minioClient.statObject(newBucket, fileName);
            objectStat.toString();
            minioClient.removeObject(newBucket, fileName);
        } catch (Exception e) {
            log.error("文件删除失败" + e.getMessage());
        }
    }

    /**
     * 删除文件
     *
     * @param fileName   文件名（相对路径）
     * @param isRelative 是否相对路径
     * @throws Exception
     */
    public static void removeObject(String fileName, boolean isRelative) {
        removeObject(bucketName, fileName, isRelative);
    }

    /**
     * 获取文件外链
     *
     * @param customBucket
     * @param objectName
     * @param expires
     * @return
     */
    public static String getObjectURL(String customBucket, String objectName, Integer expires)throws Exception {
        initMinio(minioUrl, minioName, minioPass);
        try {
            String newBucket = bucketName;
            if (StringUtil.isNotEmpty(customBucket)) {
                newBucket = customBucket;
            }
            String url = minioClient.presignedGetObject(newBucket, objectName, expires);
            return URLDecoder.decode(url, "UTF-8");
        } catch (Exception e) {
            log.error("文件路径获取失败" + e.getMessage());
        }
        return null;
    }

    /**
     * 获取文件流
     *
     * @param customBucket 桶名
     * @param fileName     文件名（相对路径）
     * @param out
     * @param isRelative   是否相对路径
     * @return
     */
    public static boolean downFile(String customBucket, String fileName, OutputStream out, boolean isRelative) {
        InputStream inputStream = null;
        try {
            initMinio(minioUrl, minioName, minioPass);
            String newBucket = bucketName;
            if (StringUtil.isNotEmpty(customBucket)) {
                newBucket = customBucket;
            }
            if (!isRelative) {
                fileName = fileName.replace(minioUrl, "");
                fileName = fileName.replace(newBucket, "");
            }
            inputStream = minioClient.getObject(newBucket, fileName);
            byte[] b = new byte[1024];
            int len;
            while ((len=inputStream.read(b)) != -1){
                out.write(b, 0, len);
            }
            out.close();
            inputStream.close();
        } catch (Exception e) {
            log.error("文件获取失败" + e.getMessage());
            return false;
        }
        return true;
    }

    /**
     * 获取文件流
     *
     * @param customBucket 桶名
     * @param fileName     文件名（相对路径）
     * @param isRelative   是否相对路径
     * @return
     */
    public static boolean checkFile(String customBucket, String fileName, boolean isRelative) {
        InputStream inputStream = null;
        try {
            initMinio(minioUrl, minioName, minioPass);
            String newBucket = bucketName;
            if (StringUtil.isNotEmpty(customBucket)) {
                newBucket = customBucket;
            }
            if (!isRelative) {
                fileName = fileName.replace(minioUrl, "");
                fileName = fileName.replace(newBucket, "");
            }
            inputStream = minioClient.getObject(newBucket, fileName);
            int byteCount = 0;
            byte[] b = new byte[1024];
            int len;
            while ((len=inputStream.read(b)) != -1){
                byteCount += byteCount;
            }
            inputStream.close();
            if(byteCount>0){
                return true;
            }else{
                return false;
            }
        } catch (Exception e) {
            log.info("文件获取失败" + e.getMessage());
            return false;
        }
    }
    /**
     * 初始化客户端
     *
     * @param minioUrl
     * @param minioName
     * @param minioPass
     * @return
     */
    private static MinioClient initMinio(String minioUrl, String minioName, String minioPass) throws InvalidEndpointException,InvalidPortException{
        if (minioClient == null) {
           minioClient = new MinioClient(minioUrl, minioName, minioPass);
        }
        return minioClient;
    }

}