package com.qxueyou.scc.controller;

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.io.IoUtil;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.StrUtil;

//import cn.hutool.core.io.FileUtil;
import com.aliyun.oss.OSSException;
import com.obs.services.exception.ObsException;
import com.obs.services.model.PutObjectResult;
import com.qxueyou.scc.base.model.CacheConstants;
import com.qxueyou.scc.base.model.FileMeta;
import com.qxueyou.scc.base.model.Result;
import com.qxueyou.scc.base.util.ClientUtils;
import com.qxueyou.scc.base.util.UUIDUtils;
import com.qxueyou.scc.teach.res.service.HweiYunOBSService;
import org.apache.commons.lang3.StringUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.util.ObjectUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.List;
import java.util.Locale;
import java.util.Map;

/**
 * @ClassName: ObsController
 * @Description: OBS服务器Controller
 * @Author: wuhuiju
 * @Date: 2021-12-21 15:20
 * @Version: 1.0
 */
@RestController
@CrossOrigin
@RequestMapping("/file")// @RequestMapping("/file")
public class HweiYunOBSController {
    private final Logger log = LogManager.getLogger("FileController");

    @Resource
    private HweiYunOBSService hweiYunOBSService;

    @RequestMapping(value = "upload", method = RequestMethod.POST)
    public List<FileMeta> save(@RequestParam(value = "file", required = false) MultipartFile file) throws IOException {

        if (ObjectUtils.isEmpty(file) || file.getSize() <= 0) {
            return null;
        }
        String originalFilename = file.getOriginalFilename();
        String substring = originalFilename.substring(originalFilename.indexOf(".")+1);

        StringBuffer path=new StringBuffer();
        //识别文件后缀格式，获取对应的文件存储路径
        String pathFile = CacheConstants.fileFormatMap.get(substring.toUpperCase(Locale.ROOT));
        if (StringUtils.isEmpty(pathFile)) {//如果为空则上传到默认存储文件夹
            path.append(CacheConstants.GUANGXI_ACQUIESCE);
        }else{
            path.append(pathFile);
        }
        String uuid = UUIDUtils.UUID();
        //将文件重新命名，防止出现重名覆盖
        String newFilename=uuid.concat(file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")));
        final List<FileMeta> test = hweiYunOBSService.fileUpload(file,path.append(newFilename).toString());
//        return ResponseVO.ok("执行成功",test);
        return test;
    }

    /**
     * 文件上传接口:为客户端提供多线程分片上传接口
     * 返回状态值:200代表成功，500代表上传失败，205代表需重新尝试
     *
     * @param identifier 唯一id，需客户端保证唯一性，相同文件保证唯一即可，非MD5
     * @return
     * @TODO : 目前缺少对 各模块文件个数、文件格式、文件大小的上传控制,统一增加在configFileModule表里面即可实现 1 图片； 2 文档 3 视频 4 音频
     */
    @RequestMapping(value = "/uploadChunk", headers = "content-type=multipart/*", method = RequestMethod.POST)
    public @ResponseBody FileMeta doUploadPublic(MultipartFile file, HttpServletResponse response,
                            Integer chunkNumber, Integer totalChunks, long chunkSize, long totalSize, String identifier, String filename, Integer currentChunkSize) {

        FileMeta fileMeta = new FileMeta();
        try {

            Result uploadResult = null;

            uploadResult = hweiYunOBSService.uploadChunk(file.getInputStream(), identifier.concat(ClientUtils.getUserId()), chunkNumber, currentChunkSize, totalChunks, filename);


            fileMeta.setFileId(uploadResult.getDataT("fileId"));
            fileMeta.setPath(uploadResult.getDataT("path"));

            if (!uploadResult.isSuccess()) {
                response.setStatus(205);
            }

        } catch (OSSException e) {
            response.setStatus(500);
            log.error(e, e);
        } catch (Exception e) {
            log.error("上传模块解析出错：" + e.getMessage(), e);
            response.setStatus(500);
        }

        fileMeta.setFileName(filename);
        fileMeta.setFileSize(String.valueOf(totalSize));
        fileMeta.setFileType(null);

        return fileMeta;
    }

    /**
     * 初始化分片上传任务
     *
     * @return
     */
    @RequestMapping(value = "/uploadChunk/init", method = RequestMethod.POST)
    public @ResponseBody
    Result initUploadChunk(String identifier, String fileName,String md5) {

        //如果MD5的对应文件存在则直接返回
//        Result result = fileService.checkMd5(md5,fileName);
        String substring = fileName.substring(fileName.indexOf(".")+1);

        StringBuffer path=new StringBuffer();
        //识别文件后缀格式，获取对应的文件存储路径
        String pathFile = CacheConstants.fileFormatMap.get(substring.toUpperCase(Locale.ROOT));
        if (StringUtils.isEmpty(pathFile)) {//如果为空则上传到默认存储文件夹
            path.append(CacheConstants.GUANGXI_ACQUIESCE);
        }else{
            path.append(pathFile);
        }
        String uuid = UUIDUtils.UUID();
        //将文件重新命名，防止出现重名覆盖
        String newFilename=uuid.concat(String.valueOf(fileName.lastIndexOf(".")));
        return hweiYunOBSService.initUploadChunk(identifier.concat(ClientUtils.getUserId()),path.append(newFilename).toString(),md5);

    }

    @RequestMapping(value = "delete", method = RequestMethod.POST)
    public Result delete(@RequestParam(value = "fileName", required = false)  String fileName) {
        if (StrUtil.isEmpty(fileName)) {
            return new Result(false,"删除文件为空");
        }
        final boolean delete = hweiYunOBSService.delete(fileName);
        return delete?new Result(true,"success"):new Result(false,"删除失败");
    }

    @RequestMapping(value = "deletes", method = RequestMethod.POST)
    //@RequestParam 获取List，数组则不需要
    public Result delete(@RequestParam("fileNames") List<String> fileNames) {
        if (ArrayUtil.isEmpty(fileNames)) {
            return new Result(false,"删除文件为空");
        }
        final boolean delete = hweiYunOBSService.delete(fileNames);
        return delete?new Result(true,"success"):new Result(false,"删除失败");
    }


    @RequestMapping(value = "download", method = RequestMethod.POST)
    public Result download(HttpServletRequest request, HttpServletResponse response, @RequestParam(value = "fileName", required = false) String fileName) {
        if (StrUtil.isEmpty(fileName)) {
            return new Result(false,"下载文件为空");
        }
        try (
                InputStream inputStream = hweiYunOBSService.fileDownload(fileName);
             BufferedOutputStream outputStream = new BufferedOutputStream(response.getOutputStream())){
            if(inputStream == null) {
                return new Result(false);
            }
            // 为防止 文件名出现乱码
            final String userAgent = request.getHeader("USER-AGENT");
            // IE浏览器
            if (StrUtil.contains(userAgent, "MSIE")) {
                fileName = URLEncoder.encode(fileName, "UTF-8");
            } else {
                // google,火狐浏览器
                if (StrUtil.contains(userAgent, "Mozilla")) {
                    fileName = new String(fileName.getBytes(), "ISO8859-1");
                } else {
                    // 其他浏览器
                    fileName = URLEncoder.encode(fileName, "UTF-8");
                }
            }
            response.setContentType("application/x-download");
            // 设置让浏览器弹出下载提示框，而不是直接在浏览器中打开
            response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
            IoUtil.copy(inputStream, outputStream);
            return null;
        } catch (IOException | ObsException e) {
            return new Result(false);
        }
    }
}