package com.heai.modules.ftp.controller;


import cn.hutool.core.date.DateUtil;
import cn.hutool.core.io.FileUtil;
import com.heai.common.exception.RRException;
import com.heai.common.utils.ConfigConstant;
import com.heai.common.utils.PageUtils;
import com.heai.common.utils.R;
import com.heai.common.utils.RandomUtil;
import com.heai.modules.ftp.util.FTPUtils;
import com.heai.modules.oss.entity.SysOssEntity;
import com.heai.modules.oss.service.SysOssService;
import com.heai.modules.sys.controller.AbstractController;
import com.heai.modules.sys.entity.SysUserEntity;
import com.heai.modules.sys.service.SysConfigService;
import lombok.extern.slf4j.Slf4j;
import org.apache.shiro.authz.annotation.RequiresPermissions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.FileSystemResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.util.ClassUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Date;
import java.util.Map;

/**
 * 文件上传
 *
 *
 */
@Slf4j
@RestController
@RequestMapping("ftp/file")
public class SysFtpController extends AbstractController {
	@Autowired
	private SysOssService sysOssService;
    @Autowired
    private SysConfigService sysConfigService;

    private final static String KEY = ConfigConstant.CLOUD_STORAGE_CONFIG_KEY;

	/**
	 * 列表
	 */
	@GetMapping("/list")
	public R list(@RequestParam Map<String, Object> params){
		PageUtils page = sysOssService.queryPage(params);

		return R.ok().put("page", page);
	}


	/**
	 * 上传文件
	 */
	@PostMapping("/upload")
	public R upload(@RequestParam("file") MultipartFile file) throws Exception {
		if (file.isEmpty()) {
			throw new RRException("上传文件不能为空");
		}
        R r = new R();
		//保存文件信息
		SysOssEntity ossEntity = new SysOssEntity();
		SysUserEntity user = getUser();
		// 文件名
		String fileName = file.getOriginalFilename();
		// 文件类型
		String fileType = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")+1);
		String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));
		// MultipartFile 转化 file
		File newFile = FTPUtils.multipartFileToFile(file,fileName);
		String newFileName = RandomUtil.getOrderNoByAtomic1(fileType)+suffix;
		// 上传路径
		String path = user.getUsername()+"/"+ DateUtil.format(new Date(),"yyyy-MM-dd");
		// ftp上传  注意文件编码格式
		boolean uploadStatus = FTPUtils.ftpUpload(path, newFileName, newFile);
		ossEntity.setFileName(file.getOriginalFilename());
		ossEntity.setNewFileName(newFileName);
		ossEntity.setUrl(path);
		ossEntity.setFileType(fileType);
		ossEntity.setCreateDate(DateUtil.date());
		ossEntity.setCreatedBy(user.getUsername());
		ossEntity.setFileSuffix(suffix);
		sysOssService.save(ossEntity);
		newFile.delete();
		return uploadStatus?R.ok().put("ossEntity", ossEntity):R.error("上附件失败");
	}

	/**
	 * 删除
	 */
	@PostMapping("/delete")
	@RequiresPermissions("sys:oss:all")
	public R delete(@RequestBody Long[] ids){
		sysOssService.removeByIds(Arrays.asList(ids));
		return R.ok();
	}

	/**
	 * @Method multipartFileToFile
	 * @Description: MultipartFile 转 File
	 * @author zuowenwen
	 * @Version  1.0
	 * @param file
	 * @return java.io.File
	 * @throws
	 * @date 2020/12/17
	 */
	public static File multipartFileToFile(MultipartFile file ,String fileName) throws Exception {
		File toFile = null;
		if (file.equals("") || file.getSize() <= 0) {
			file = null;
		} else {
			InputStream ins = null;
			ins = file.getInputStream();
			if(fileName != null && !"".equals(fileName)){
				toFile = new File(fileName);
			}else{
				toFile = new File(file.getOriginalFilename());
			}
			inputStreamToFile(ins, toFile);
			ins.close();
		}
		return toFile;
	}

	//获取流文件
	private static void inputStreamToFile(InputStream ins, File file) {
		try {
			OutputStream os = new FileOutputStream(file);
			int bytesRead = 0;
			byte[] buffer = new byte[8192];
			while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
				os.write(buffer, 0, bytesRead);
			}
			os.close();
			ins.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * @Method downFtpFile
	 * @Description: ftp 文件流下载 (返回给前端一个文件流)
	 * @author sxm
	 * @Version  1.0
	 * @param id
	 * @return java.io.File
	 * @throws
	 * @date 2020/12/17
	 */
	@GetMapping("/downFtpFile/{id}")
	public void downFtpFile(@PathVariable("id") Long id, HttpServletResponse response){

//		SysOssEntity resultData =sysOssService.getById(id);
//		String path = System.getProperty("user.dir");
//		File file = new File(path+"/"+resultData.getFileName());
//		FTPUtils.ftpDownload(resultData.getUrl(),resultData.getFileName(),file);
//		HttpHeaders headers = new HttpHeaders();
//		headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
//		headers.add("Content-Disposition", "attachment; filename=" + file.getName());
//		headers.add("Pragma", "no-cache");
//		headers.add("Expires", "0");
//		headers.add("Last-Modified", new Date().toString());
//		headers.add("ETag", String.valueOf(System.currentTimeMillis()));
//		return ResponseEntity.ok().headers(headers).contentLength(file.length()).contentType(MediaType.parseMediaType("application/octet-stream")).body(new FileSystemResource(file));
//		//FTPUtils.downFile(response,"",resultData.getNewFileName(),resultData.getFileName());

		SysOssEntity resultData =sysOssService.getById(id);
		FTPUtils.downFile(response,resultData.getUrl(),resultData.getNewFileName(),resultData.getFileName());
	}

}