package com.keystar.plane.inspection.service.impl;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.map.MapUtil;
import cn.hutool.core.text.CharSequenceUtil;
import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.JSONObject;
import com.keystar.plane.inspection.config.MinIoConfig;
import com.keystar.plane.inspection.utils.FileUtil;
import com.keystar.plane.inspection.vo.UploadVo;
import io.minio.MinioClient;
import io.minio.Result;
import io.minio.errors.*;
import io.minio.messages.Item;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;
import org.xmlpull.v1.XmlPullParserException;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import javax.validation.Valid;
import javax.validation.constraints.NotNull;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
@RefreshScope
public class MinioService {

    @Resource
    private MinioClient minioClient;

    @Autowired
    private MinIoConfig minIoConfig;

    @Value("${report.bucket}")
    private String bucket;


    /**
     * 判断 bucket是否存在
     * @param bucketName
     * @return
     */
    public boolean bucketExists(String bucketName){
        try {
            return minioClient.bucketExists(bucketName);
        } catch (Exception e) {
            log.error("判断 bucket是否存在,出现错误:{}",e);
            return false;
        }
    }

    /**
     * 根据 bucket 获取该桶下边的所有目录
     * @param bucketName
     */
    public List<Item> listObject(String bucketName){
        try {
            Iterable<Result<Item>> myObjects = minioClient.listObjects(bucketName);
            return getItems(myObjects);
        } catch (Exception e) {
            log.error("获取桶{}的文件内容,出现错误:{}",bucketName,e);
            return null;
        }
    }

    private List<Item> getItems(Iterable<Result<Item>> myObjects) throws InvalidBucketNameException, NoSuchAlgorithmException, InsufficientDataException, IOException, InvalidKeyException, NoResponseException, XmlPullParserException, ErrorResponseException, InternalException {
        List<Item> items = CollUtil.newArrayList();
        for (Result<Item> result : myObjects) {
            items.add(result.get());
        }
        return items;
    }

    /**
     * 获取文件流
     * @param bucketName
     * @param objectName
     * @return
     */
    public InputStream getObject(String bucketName, String objectName)  {
        try {
            return minioClient.getObject(bucketName,objectName);
        } catch (Exception e) {
            log.error("获取桶{}的{}文件内容,出现错误:{}",bucketName,objectName,e);
        }
        return null;
    }


    /***
     * 根据 bucket 和 prefix 获取该所有目录和文件
     * @param bucketName
     * @param prefix
     * @param recursive
     * @param useVersion1
     * @return
     */
    public List<Item> listObject(String bucketName,String prefix, boolean recursive, boolean useVersion1){
        try {
            Iterable<Result<Item>> myObjects = minioClient.listObjects(bucketName,prefix,recursive,useVersion1);
            return getItems(myObjects);
        } catch (Exception e) {
            log.error("获取桶{}的文件内容,出现错误:{}",bucketName,e);
            return null;
        }
    }


    /**
     * 获取最新架次的红外图片地址
     **/
    public List<String> getInfraredPhoto(){
        List<String> infraredList = new ArrayList<>();
        // 获取最新航线
        List<Item> missions = this.listObject(minIoConfig.getBucketName(), minIoConfig.getResourcePath(), false, false);
        String missionId = missions.get(missions.size()-1).objectName();
        // 获取最新架次
        List<Item> records = this.listObject(minIoConfig.getBucketName(), missionId, false, false);
        String recordsId = records.get(records.size()-1).objectName();
        // 获取红外图片
        List<Item> photos = this.listObject(minIoConfig.getBucketName(), recordsId, false, false);
        List<String> photoList = photos.stream().map(Item::objectName).collect(Collectors.toList());
        for ( String name : photoList){
            if (name.contains("THRM.jpg") || name.contains("T.jpg")){
                infraredList.add(name);
            }
        }
        return infraredList;
    }

    /**
     * 文件上传
     */
    public void putObject(String bucketName, String objectName, InputStream stream,String contentType)  {
        if (!bucketExists(bucketName)){
            log.error("bucket不存在");
        }
        try {
            minioClient.putObject(bucketName,objectName,stream,contentType);
        } catch (Exception e) {
            log.error("上传文件{}到桶{},出现错误:{}",objectName,bucketName,e);
        }
    }

    public void upload(@Valid UploadVo uploadVo)  {
        log.info("上传图片信息，fileSize：{}，fileName：{}", uploadVo.getFile().getSize(), uploadVo.getFile().getOriginalFilename());

        if (StrUtil.isEmpty(uploadVo.getResourceName())){
            uploadVo.setResourceName(uploadVo.getFile().getOriginalFilename());
        }

        try {
            this.putObject(uploadVo.getBucketName(),uploadVo.getPath(),uploadVo.getFile().getInputStream(),uploadVo.getFile().getContentType());
        }catch (IOException ioe){
            log.error("获取图片流失败:{}",ioe);
        }
    }

    /**
     * 下载文件
     */
    public String download(String resourceFullName, HttpServletResponse response) throws IOException {

        OutputStream outputStream = response.getOutputStream();
        // 拿到文件路径
        String[] strings = StrUtil.splitToArray(resourceFullName, "/");
        String url = strings[1];
        // 获取文件对象
        InputStream inputStream = this.getObject(url, StrUtil.sub(resourceFullName,
                CharSequenceUtil.length(strings[1])+2, CharSequenceUtil.length(resourceFullName)));
        try {
            response.reset();
            response.setHeader("Content-Disposition", "attachment;filename=" +
                    URLEncoder.encode(resourceFullName.substring(resourceFullName.lastIndexOf("/") + 1), "UTF-8"));
            response.setContentType("application/octet-stream");
            response.setCharacterEncoding("UTF-8");
            // 输出文件
            outputStream.write(FileUtil.readInputStream(inputStream));
            outputStream.flush();
        } catch (Exception ex) {
            log.error("下载文件:{}",ex);
            return "下载文件失败";
        }finally {
            // 关闭输出流
            outputStream.close();
        }
        return "下载文件成功";
    }

    /**
     *  获取最新的巡检报告的地址
     **/
    public String getReportPath(){
        // 获取bucket中的报告地址
        List<Item> dateList = this.listObject(bucket);
        String date = dateList.get(dateList.size()-1).objectName();
        // 拼接地址
        return "/" + bucket + "/" + date;
    }
    

}