package com.ruoyi.web.controller.common;

import java.io.File;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.websocket.server.PathParam;

import com.ruoyi.common.annotation.Anonymous;
import com.ruoyi.common.utils.RenamedMultipartFile;
import com.ruoyi.common.utils.uuid.UUID;
import com.ruoyi.service.DownLoadFileService;
import lombok.Data;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;

/**
 * 通用请求处理
 * 
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    @Autowired
    private DownLoadFileService downLoadFileService;

    private static final String FILE_DELIMETER = ",";

    private static final Pattern CHINESE_PATTERN = Pattern.compile("[\u4e00-\u9fa5]");


//    @GetMapping("/downloadFile")
//    public void fileDownload(@PathParam("path") String path, HttpServletResponse response)
//    {
//        path=path.substring(8);
//        try
//        {
//            if (!FileUtils.checkAllowDownload(path))
//            {
//                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", path));
//            }
//            String realFileName = System.currentTimeMillis() + path.substring(path.indexOf("_") + 1);
//            String filePath = RuoYiConfig.getProfile() + path;
//
//            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
//            FileUtils.setAttachmentResponseHeader(response, realFileName);
//            FileUtils.writeBytes(filePath, response.getOutputStream());
//
//        }
//        catch (Exception e)
//        {
//            log.error("下载文件失败", e);
//        }
//    }


    //    /**
//     * 通用下载请求
//     *
//     * @param fileName 文件名称
//     * @param delete 是否删除
//     */
//    @GetMapping("/download")
//    public void fileDownload(@PathParam("fileName") String fileName, @PathParam("delete") Boolean delete, HttpServletResponse response)
//    {
//        try
//        {
//            if (!FileUtils.checkAllowDownload(fileName))
//            {
//                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
//            }
//            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
//            String filePath = RuoYiConfig.getDownloadPath() + fileName;
//
//            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
//            FileUtils.setAttachmentResponseHeader(response, realFileName);
//            FileUtils.writeBytes(filePath, response.getOutputStream());
//            if (delete)
//            {
//                FileUtils.deleteFile(filePath);
//            }
//        }
//        catch (Exception e)
//        {
//            log.error("下载文件失败", e);
//        }
//    }
    @Anonymous

    @GetMapping("/downLoadFile")
    public void downLoadFile(@PathParam("path") String path, HttpServletResponse response) throws Exception {
        downLoadFileService.downLoadFile(path, response);
    }


    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(@RequestParam("uploadFile") MultipartFile file, String fname) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file, fname);
            String url = serverConfig.getUrl() + fileName;

            AjaxResult ajax = AjaxResult.success();

            HashMap<String, Object> data = new HashMap<>();
            data.put("url", url);
            data.put("fileName", fileName);
            data.put("newFileName", FileUtils.getName(fileName));
            data.put("originalFilename", file.getOriginalFilename());

            ajax.put("msg", "操作成功");
            ajax.put("data", data);
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }


    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(@RequestParam("files")  List<MultipartFile> files) throws Exception
    {
        //System.out.println("99999999999999999999999990000000000000000");
        try
        {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            // System.out.println("99999999999999999999999990000000000000000");
            //  System.out.println(files);
            //  System.out.println(files.size());

            for (MultipartFile file : files)
            {
                // 上传并返回新文件名称
                String filename = "";
                //   System.out.println("1122123330+++++++++++++++++++++++++++++");

                String fileName = FileUploadUtils.upload(filePath, file, filename);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            //  System.out.println("99999999999999999999999990000000000000000");

            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            //  System.out.println("1122123330+++++++++++++++++++++++++++++");
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个） 将中文修改为其他
     */
    @PostMapping("/noChinese/uploads")
    public AjaxResult noChineseUploadFiles(@RequestParam("files") List<MultipartFile> files) throws Exception {
        //System.out.println("99999999999999999999999990000000000000000");
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();

            for (MultipartFile file : files) {
                originalFilenames.add(file.getOriginalFilename());

                String safeFilename = generateSafeFilename(file.getOriginalFilename());

                MultipartFile renamedFile = new RenamedMultipartFile(file, safeFilename);

                String lastName="";

                String fileName = FileUploadUtils.upload(filePath, renamedFile, lastName);

                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
            }
            AjaxResult ajax = AjaxResult.success();

            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 生成安全文件名（只替换中文部分）
     */
    private String generateSafeFilename(String originalName) {
        if (originalName == null) {
            return "";
        }

        // 1. 获取文件扩展名
        String extension = "";
        int dotIndex = originalName.lastIndexOf('.');
        if (dotIndex > 0) {
            extension = originalName.substring(dotIndex);
            originalName = originalName.substring(0, dotIndex);
        }

        // 2. 只替换中文部分
        StringBuilder safeName = new StringBuilder();
        Matcher matcher = CHINESE_PATTERN.matcher(originalName);
        int lastEnd = 0;

        while (matcher.find()) {
            // 添加非中文部分
            safeName.append(originalName, lastEnd, matcher.start());

            // 添加随机字符串替换中文
            safeName.append(generateRandomString(4));

            lastEnd = matcher.end();
        }

        // 添加剩余部分
        safeName.append(originalName.substring(lastEnd));
        String noSpaceName = safeName.toString().replaceAll("\\s", "");

        // 3. 添加扩展名
        return noSpaceName + extension;
    }
    /**
     * 生成随机字符串（字母+数字）
     */
    private String generateRandomString(int length) {
        String uuid = UUID.randomUUID().toString().replace("-", "");
        return uuid.substring(0, Math.min(length, uuid.length()));
    }


    @PostMapping("/uploads1")
    public AjaxResult uploadFiles1(@RequestParam("files") List<MultipartFile> files) {
        try {
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<>();
            List<String> fileNames = new ArrayList<>();
            List<String> newFileNames = new ArrayList<>();
            List<String> originalFilenames = new ArrayList<>();
            List<String> httpSafePaths = new ArrayList<>();

            for (MultipartFile file : files) {
                // 1. 上传文件
                String fileName = FileUploadUtils.upload(filePath, file, "");
                String originalFilename = file.getOriginalFilename();

                // 2. 获取HTTP安全路径
                String httpSafePath = toHttpPath(fileName);

                // 3. 构建完整URL（确保有斜杠分隔）
                String baseUrl = serverConfig.getUrl();
                if (!baseUrl.endsWith("/") && !httpSafePath.startsWith("/")) {
                    baseUrl += "/";
                }
                String url = baseUrl + httpSafePath;

                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(originalFilename);
                httpSafePaths.add(httpSafePath);
            }

            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            ajax.put("httpSafePaths", StringUtils.join(httpSafePaths, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }


    /**
     * 将包含中文的文件路径转换为 HTTP 安全的 URL 路径
     */

    public String toHttpPath(String filePath) {
        try {
            // 1. 标准化路径
            Path normalizedPath = Paths.get(filePath).normalize();

            // 2. 统一使用正斜杠
            String pathStr = normalizedPath.toString().replace("\\", "/");

            // 3. 分割路径组件
            String[] parts = pathStr.split("/");
            StringBuilder encodedPath = new StringBuilder();

            // 4. 对每个组件单独编码并处理空格
            for (String part : parts) {
                if (!part.isEmpty()) {
                    // 编码并替换空格为 %20
                    String encodedPart = URLEncoder.encode(part, StandardCharsets.UTF_8.name())
                            .replace("+", "%20");
                    encodedPath.append("/").append(encodedPart);
                }
            }

            // 5. 处理绝对路径和相对路径
            return filePath.startsWith("/") || filePath.startsWith("\\") ?
                    encodedPath.toString() :
                    encodedPath.substring(1);
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException("UTF-8 encoding not supported", e);
        }
        }

    /**
     * 从 HTTP URL 路径还原原始中文路径
     */
    @PostMapping("/getFileName")
    public String extractFileName(@RequestBody String httpPath) {
        try {
            // 1. 处理空值
            if (httpPath == null || httpPath.trim().isEmpty()) {
                return "";
            }

            // 2. 移除URL协议、域名和查询参数
            String pathOnly = httpPath;

            // 移除协议和域名
            if (pathOnly.contains("://")) {
                pathOnly = pathOnly.substring(pathOnly.indexOf("://") + 3);
                pathOnly = pathOnly.substring(pathOnly.indexOf('/'));
            }

            // 移除查询参数（如 ?token=123）
            int queryStart = pathOnly.indexOf('?');
            if (queryStart > 0) {
                pathOnly = pathOnly.substring(0, queryStart);
            }

            // 3. URL解码
            String decodedPath = URLDecoder.decode(pathOnly, StandardCharsets.UTF_8.name());

            // 4. 提取文件名（处理Windows路径）
            decodedPath = decodedPath.replace("\\", "/");

            // 获取最后一个非空路径组件
            int lastSlash = decodedPath.lastIndexOf('/');
            String fileName = (lastSlash >= 0 && lastSlash < decodedPath.length() - 1) ?
                    decodedPath.substring(lastSlash + 1) : decodedPath;

            // 5. 处理特殊情况（如结尾斜杠）
            if (fileName.isEmpty()) {
                // 尝试获取倒数第二个组件
                int prevSlash = decodedPath.lastIndexOf('/', lastSlash - 1);
                if (prevSlash >= 0) {
                    fileName = decodedPath.substring(prevSlash + 1, lastSlash);
                }
            }

            return fileName;
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException("UTF-8 encoding not supported", e);
        }
    }


    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }

    }
}