package org.jeecg.modules.system.controller;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.jeecg.common.api.vo.Result;
import org.jeecg.common.constant.CommonConstant;
import org.jeecg.common.constant.SymbolConstant;
import org.jeecg.common.exception.JeecgBootException;
import org.jeecg.common.util.CommonUtils;
import org.jeecg.common.util.RestDesformUtil;
import org.jeecg.common.util.filter.FileTypeFilter;
import org.jeecg.common.util.oConvertUtils;
import org.jeecg.config.JeecgBaseConfig;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.ClassPathResource;
import org.springframework.util.AntPathMatcher;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;

/**
 * <p>
 * 系统公共 前端控制器
 * </p>
 *
 * @Author scott
 * @since 2018-12-20
 */
@Slf4j
@RestController
@RequestMapping("/sys/common")
@Api(tags = "系统公共")
public class CommonController {

    @Value(value = "${jeecg.path.upload}")
    private String uploadpath;

    /**
     * 本地：local minio：minio 阿里：alioss
     */
    @Value(value = "${jeecg.uploadType}")
    private String uploadType;

    @Resource
    private JeecgBaseConfig jeecgBaseConfig;

    /**
     * @return
     * @Author 政辉
     */
    @GetMapping("/403")
    public Result<?> noauth() {
        return Result.error("没有权限，请联系管理员授权");
    }

    /**
     * 文件上传统一方法
     *
     * @param request
     * @param response
     * @return
     */
    @PostMapping(value = "/upload")
    @ApiOperation(value = "文件上传", notes = "文件上传")
    public Result<?> upload(HttpServletRequest request, HttpServletResponse response) throws Exception {
        Result<String> result = new Result<>();
        String savePath = "";
        String bizPath = request.getParameter("biz");

        //LOWCOD-2580 sys/common/upload接口存在任意文件上传漏洞
        if (oConvertUtils.isNotEmpty(bizPath)) {
            if (bizPath.contains(SymbolConstant.SPOT_SINGLE_SLASH) || bizPath.contains(SymbolConstant.SPOT_DOUBLE_BACKSLASH)) {
                throw new JeecgBootException("上传目录bizPath，格式非法！");
            }
        }

        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
        // 获取上传文件对象
        MultipartFile file = multipartRequest.getFile("file");
        if (oConvertUtils.isEmpty(bizPath)) {
            if (CommonConstant.UPLOAD_TYPE_OSS.equals(uploadType)) {
                //未指定目录，则用阿里云默认目录 upload
                bizPath = "upload";
                //result.setMessage("使用阿里云文件上传时，必须添加目录！");
                //result.setSuccess(false);
                //return result;
            } else {
                bizPath = "";
            }
        }
        if (CommonConstant.UPLOAD_TYPE_LOCAL.equals(uploadType)) {
            //update-begin-author:liusq date:20221102 for: 过滤上传文件类型
            FileTypeFilter.fileTypeFilter(file);
            //update-end-author:liusq date:20221102 for: 过滤上传文件类型
            //update-begin-author:lvdandan date:20200928 for:修改JEditor编辑器本地上传
            savePath = this.uploadLocal(file, bizPath);
            //update-begin-author:lvdandan date:20200928 for:修改JEditor编辑器本地上传
            /**  富文本编辑器及markdown本地上传时，采用返回链接方式
             //针对jeditor编辑器如何使 lcaol模式，采用 base64格式存储
             String jeditor = request.getParameter("jeditor");
             if(oConvertUtils.isNotEmpty(jeditor)){
             result.setMessage(CommonConstant.UPLOAD_TYPE_LOCAL);
             result.setSuccess(true);
             return result;
             }else{
             savePath = this.uploadLocal(file,bizPath);
             }
             */
        } else {
            //update-begin-author:taoyan date:20200814 for:文件上传改造
            savePath = CommonUtils.upload(file, bizPath, uploadType);
            //update-end-author:taoyan date:20200814 for:文件上传改造
        }
        if (oConvertUtils.isNotEmpty(savePath)) {
            savePath = jeecgBaseConfig.getFileViewDomain() + RestDesformUtil.path + "/sys/common/static/" + savePath;
            result.setResult(savePath);
            result.setSuccess(true);
        } else {
            result.setMessage("上传失败！");
            result.setSuccess(false);
        }
        return result;
    }

    /**
     * 本地文件上传
     *
     * @param mf      文件
     * @param bizPath 自定义路径
     * @return
     */
    private String uploadLocal(MultipartFile mf, String bizPath) {
        try {
            String ctxPath = uploadpath;
            String fileName = null;
            File file = new File(ctxPath + File.separator + bizPath + File.separator);
            if (!file.exists()) {
                // 创建文件根目录
                file.mkdirs();
            }
            // 获取文件名
            String orgName = mf.getOriginalFilename();
            orgName = CommonUtils.getFileName(orgName);
            if (orgName.indexOf(SymbolConstant.SPOT) != -1) {
                fileName = orgName.substring(0, orgName.lastIndexOf(".")) + "_" + System.currentTimeMillis() + orgName.substring(orgName.lastIndexOf("."));
            } else {
                fileName = orgName + "_" + System.currentTimeMillis();
            }
            String savePath = file.getPath() + File.separator + fileName;
            File savefile = new File(savePath);
            FileCopyUtils.copy(mf.getBytes(), savefile);
            String dbpath = null;
            if (oConvertUtils.isNotEmpty(bizPath)) {
                dbpath = bizPath + File.separator + fileName;
            } else {
                dbpath = fileName;
            }
            if (dbpath.contains(SymbolConstant.DOUBLE_BACKSLASH)) {
                dbpath = dbpath.replace(SymbolConstant.DOUBLE_BACKSLASH, SymbolConstant.SINGLE_SLASH);
            }
            return dbpath;
        } catch (IOException e) {
            log.error(e.getMessage(), e);
        }
        return "";
    }


    /**
     * 预览图片&下载文件
     * 请求地址：http://localhost:8080/common/static/{user/20190119/e1fe9925bc315c60addea1b98eb1cb1349547719_1547866868179.jpg}
     *
     * @param request
     * @param response
     */
    @GetMapping(value = "/static/**")
    @ApiOperation(value = "预览图片&下载文件", notes = "预览图片&下载文件")
    public void view(HttpServletRequest request, HttpServletResponse response) {
        // ISO-8859-1 ==> UTF-8 进行编码转换
        String imgPath = extractPathFromPattern(request);
        if (oConvertUtils.isEmpty(imgPath) || CommonConstant.STRING_NULL.equals(imgPath)) {
            return;
        }
        // 其余处理略
        InputStream inputStream = null;
        OutputStream outputStream = null;
        try {
            imgPath = imgPath.replace("..", "").replace("../", "");
            if (imgPath.endsWith(SymbolConstant.COMMA)) {
                imgPath = imgPath.substring(0, imgPath.length() - 1);
            }
            String filePath = uploadpath + File.separator + imgPath;
            File file = new File(filePath);
            if (!file.exists()) {
                response.setStatus(404);
                throw new RuntimeException("文件[" + imgPath + "]不存在..");
            }
            // 设置强制下载不打开
            response.setContentType("application/force-download");
            response.addHeader("Content-Disposition", "attachment;fileName=" + new String(file.getName().getBytes("UTF-8"), "iso-8859-1"));
            inputStream = new BufferedInputStream(new FileInputStream(filePath));
            outputStream = response.getOutputStream();
            byte[] buf = new byte[1024];
            int len;
            while ((len = inputStream.read(buf)) > 0) {
                outputStream.write(buf, 0, len);
            }
            response.flushBuffer();
        } catch (IOException e) {
            log.error("预览文件失败" + e.getMessage());
            response.setStatus(404);
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    log.error(e.getMessage(), e);
                }
            }
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    log.error(e.getMessage(), e);
                }
            }
        }

    }


    @GetMapping(value = "/excelTemplate/**")
    @ApiOperation(value = "excelTemplate 下载", notes = "excelTemplate 下载")
    public void excelTemplate(HttpServletRequest request, HttpServletResponse response) {
        // ISO-8859-1 ==> UTF-8 进行编码转换
        String excelPath = extractPathFromPattern(request);
        if (oConvertUtils.isEmpty(excelPath) || CommonConstant.STRING_NULL.equals(excelPath)) {
            return;
        }
        // 其余处理略
        InputStream inputStream = null;
        OutputStream outputStream = null;
        try {
            ClassPathResource classPathResource = new ClassPathResource("templates" + File.separator + "excel" + File.separator + excelPath);
            // 设置强制下载不打开
            response.setContentType("application/vnd.ms-excel;charset=UTF-8");
            response.addHeader("Content-Disposition", "attachment;fileName=" + new String(excelPath.getBytes("UTF-8"), "iso-8859-1"));
            response.addHeader("Cache-Control", "no-cache");
            inputStream = classPathResource.getInputStream();
            outputStream = response.getOutputStream();
            byte[] buf = new byte[1024];
            int len;
            while ((len = inputStream.read(buf)) > 0) {
                outputStream.write(buf, 0, len);
            }
            response.flushBuffer();
        } catch (IOException e) {
            log.error("预览文件失败" + e.getMessage());
            response.setStatus(404);
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    log.error(e.getMessage(), e);
                }
            }
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    log.error(e.getMessage(), e);
                }
            }
        }

    }


//	/**
//	 * 下载文件
//	 * 请求地址：http://localhost:8080/common/download/{user/20190119/e1fe9925bc315c60addea1b98eb1cb1349547719_1547866868179.jpg}
//	 *
//	 * @param request
//	 * @param response
//	 * @throws Exception
//	 */
//	@GetMapping(value = "/download/**")
//	public void download(HttpServletRequest request, HttpServletResponse response) throws Exception {
//		// ISO-8859-1 ==> UTF-8 进行编码转换
//		String filePath = extractPathFromPattern(request);
//		// 其余处理略
//		InputStream inputStream = null;
//		OutputStream outputStream = null;
//		try {
//			filePath = filePath.replace("..", "");
//			if (filePath.endsWith(",")) {
//				filePath = filePath.substring(0, filePath.length() - 1);
//			}
//			String localPath = uploadpath;
//			String downloadFilePath = localPath + File.separator + filePath;
//			File file = new File(downloadFilePath);
//	         if (file.exists()) {
//	         	response.setContentType("application/force-download");// 设置强制下载不打开            
//	 			response.addHeader("Content-Disposition", "attachment;fileName=" + new String(file.getName().getBytes("UTF-8"),"iso-8859-1"));
//	 			inputStream = new BufferedInputStream(new FileInputStream(file));
//	 			outputStream = response.getOutputStream();
//	 			byte[] buf = new byte[1024];
//	 			int len;
//	 			while ((len = inputStream.read(buf)) > 0) {
//	 				outputStream.write(buf, 0, len);
//	 			}
//	 			response.flushBuffer();
//	         }
//
//		} catch (Exception e) {
//			log.info("文件下载失败" + e.getMessage());
//			// e.printStackTrace();
//		} finally {
//			if (inputStream != null) {
//				try {
//					inputStream.close();
//				} catch (IOException e) {
//					e.printStackTrace();
//				}
//			}
//			if (outputStream != null) {
//				try {
//					outputStream.close();
//				} catch (IOException e) {
//					e.printStackTrace();
//				}
//			}
//		}
//
//	}

    /**
     * @param modelAndView
     * @return
     * @功能：pdf预览Iframe
     */
    @RequestMapping("/pdf/pdfPreviewIframe")
    public ModelAndView pdfPreviewIframe(ModelAndView modelAndView) {
        modelAndView.setViewName("pdfPreviewIframe");
        return modelAndView;
    }

    /**
     * 把指定URL后的字符串全部截断当成参数
     * 这么做是为了防止URL中包含中文或者特殊字符（/等）时，匹配不了的问题
     *
     * @param request
     * @return
     */
    private static String extractPathFromPattern(final HttpServletRequest request) {
        String path = (String) request.getAttribute(HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE);
        String bestMatchPattern = (String) request.getAttribute(HandlerMapping.BEST_MATCHING_PATTERN_ATTRIBUTE);
        return new AntPathMatcher().extractPathWithinPattern(bestMatchPattern, path);
    }

}
