package com.ruoyi.project.common;

import com.ruoyi.basic.service.StorageBlobService;
import com.ruoyi.basic.utils.FileUtil;
import com.ruoyi.framework.aspectj.lang.annotation.Anonymous;
import com.ruoyi.framework.web.domain.R;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.servlet.http.HttpServletResponse;
import lombok.AllArgsConstructor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.FileSystemResource;
import org.springframework.http.ContentDisposition;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.util.List;

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


    private final StorageBlobService storageBlobService;
    private final FileUtil fileUtil;


//    /**
//     * 通用下载请求
//     *
//     * @param fileName 文件名称
//     * @param delete 是否删除
//     */
//    @GetMapping("/download")
//    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
//    {
//        try
//        {
//            if (!FileUtils.checkAllowDownload(fileName))
//            {
//                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
//            }
//            String realFileName =  fileName.substring(fileName.indexOf("_") + 1);
//
//            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
//            FileUtils.setAttachmentResponseHeader(response, realFileName);
//            FileUtils.writeBytes(fileName, response.getOutputStream());

    /// /            if (delete)
    /// /            {
    /// /                FileUtils.deleteFile(fileName);
    /// /            }
//        }
//        catch (Exception e)
//        {
//            log.error("下载文件失败", e);
//        }
//    }
//
//    /**
//     * 通用上传请求（单个）
//     */
//    @PostMapping("/upload")
//    public AjaxResult uploadFile(MultipartFile file) 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);
//            String url = serverConfig.getUrl() + fileName;
//            AjaxResult ajax = AjaxResult.success();
//            ajax.put("url", url);
//            ajax.put("fileName", fileName);
//            ajax.put("newFileName", FileUtils.getName(fileName));
//            ajax.put("originalFilename", file.getOriginalFilename());
//            return ajax;
//        }
//        catch (Exception e)
//        {
//            return AjaxResult.error(e.getMessage());
//        }
//    }
//
//    /**
//     * 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);
//        }
//    }
    @PostMapping({"/upload"})
    @Operation(summary = "文件上传")
    public R upload(@RequestParam("files") List<MultipartFile> files) throws Exception {
        return R.ok(storageBlobService.upload(files));
    }


    @GetMapping("/download/{fileName}")
    @Anonymous
    public void download(@PathVariable String fileName, @RequestParam("token") String token, HttpServletResponse response) throws Exception {
        File file = storageBlobService.getFileByToken(fileName, token);
        String originalFileName = storageBlobService.getDownloadFileName(fileName);
        String encodedFileName = URLEncoder.encode(originalFileName, StandardCharsets.UTF_8.name()).replace("+", "%20");
        response.setHeader("Content-Disposition", "attachment;filename*=UTF-8''" + encodedFileName);
        response.setContentLengthLong(file.length());
        Files.copy(file.toPath(), response.getOutputStream());
    }

    @GetMapping("/preview/{fileName}")
    @Anonymous
    public ResponseEntity<FileSystemResource> preview(@PathVariable String fileName,
                                                      @RequestParam("token") String token) throws Exception {
        File file = fileUtil.compressFile(storageBlobService.getFileByToken(fileName, token));
        String contentType = Files.probeContentType(file.toPath());

        ContentDisposition contentDisposition = ContentDisposition.inline()
                .filename(fileName, StandardCharsets.UTF_8)
                .build();

        return ResponseEntity.ok()
                .contentType(MediaType.parseMediaType(contentType != null ? contentType : "application/octet-stream"))
                .contentLength(file.length())
                .header("Content-Disposition", contentDisposition.toString())
                .body(new FileSystemResource(file));
    }
}