package com.takai.ai.utils;

import com.takai.ai.domain.TakaiSysOss;
import com.takai.ai.domain.TakaiSysOssConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import io.minio.*;
import io.minio.messages.Bucket;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.UUID;

@Component
public class MinioUtil {

    private static final Logger logger = LoggerFactory.getLogger(MinioUtil.class);

    private final MinioClient minioClient;
    private final String bucketName;

    @Autowired
    public MinioUtil(MinioClient minioClient, String bucketName) throws Exception{
        this.minioClient = minioClient;
        this.bucketName = bucketName;
        initializeBucket();
    }

    private void initializeBucket() throws Exception {
        if (!minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build())) {
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucketName).build());
        }
    }

    /**
     * 批量上传文件
     * @param files      文件列表
     * @return 上传成功的文件URL列表
     */
    public List<TakaiSysOss> uploadMultiple(MultipartFile[] files) throws Exception {
//        try {
//            TakaiSysOss ossVo = upload(files);
//            return ossVo;
//        } catch (Exception e) {
//            // 记录失败文件信息，但继续处理其他文件
//            System.err.println("文件上传失败: " + files.getOriginalFilename() + ", 原因: " + e.getMessage());
//        }
        List<TakaiSysOss> result = new ArrayList<>();
        for (MultipartFile file : files) {
            if (file.isEmpty()) {
                continue;
            }
            try {
                TakaiSysOss ossVo = upload(file);
                result.add(ossVo);
            } catch (Exception e) {
                // 记录失败文件信息，但继续处理其他文件
                System.err.println("文件上传失败: " + file.getOriginalFilename() + ", 原因: " + e.getMessage());
            }
        }
        return result;
    }

    /**
     * 检查存储桶是否存在
     */
    public boolean bucketExists(String bucketName) throws Exception {
        return minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
    }

    /**
     * 创建存储桶
     */
    public void makeBucket(String bucketName) throws Exception {
        if (!bucketExists(bucketName)) {
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucketName).build());
        }
    }

    /**
     * 列出所有存储桶
     */
    public List<Bucket> listBuckets() throws Exception {
        return minioClient.listBuckets();
    }

    /**
     * 上传文件
     * @param file       文件对象
     * @return 文件访问URL
     */
    public TakaiSysOss upload(MultipartFile file) throws Exception {
        // 如果存储桶不存在则创建
        makeBucket(bucketName);
        // 生成日期目录路径 yyyy/MM/dd
        String dateDir = new SimpleDateFormat("yyyy/MM/dd").format(new Date());
        // 生成唯一文件名
        String originalFilename = file.getOriginalFilename();
//        String fileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));
//        String fileName = dateDir + "/" + originalFilename;
        String fileName = originalFilename;
        // 上传文件
        try (InputStream inputStream = file.getInputStream()) {
            minioClient.putObject(
                    PutObjectArgs.builder()
                            .bucket(bucketName)
                            .object(fileName)
                            .stream(inputStream, file.getSize(), -1)
                            .contentType(file.getContentType())
                            .build());

            logger.info("文件上传成功: " + fileName);

            SnowflakeDigitGenerator snowflakeDigitGenerator = new SnowflakeDigitGenerator(1, 1);
            long ossId = snowflakeDigitGenerator.nextId();
            String url = minioClient.getObjectUrl(bucketName, fileName);
            TakaiSysOss oss = new TakaiSysOss();
            oss.setOssId("a"+ossId);
            oss.setUrl(url);
            oss.setFileName(fileName);
            oss.setOriginalName(originalFilename);
            oss.setService("service");
            oss.setFileSuffix(fileName.substring(fileName.lastIndexOf(".")));
            return oss;
        }
    }

    /**
     * 下载文件
     */
    public InputStream download(String bucketName, String objectName) throws Exception {
        return minioClient.getObject(
                GetObjectArgs.builder()
                        .bucket(bucketName)
                        .object(objectName)
                        .build());
    }

    /**
     * 删除文件
     */
    public void remove(String bucketName, String objectName) throws Exception {
        minioClient.removeObject(
                RemoveObjectArgs.builder()
                        .bucket(bucketName)
                        .object(objectName)
                        .build());
    }

    /**
     * 获取文件URL
     */
    public String getFileUrl(String bucketName, String objectName) throws Exception {
        return minioClient.getObjectUrl(bucketName, objectName);
    }

}