package com.campus.controller;

import com.campus.dto.response.FileUploadResponse;
import com.campus.util.OssUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@RestController
@RequestMapping("/api/file")
@CrossOrigin
public class FileUploadController {

    @Autowired
    private OssUtil ossUtil;

    /**
     * 通用文件上传
     */
    @PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public FileUploadResponse uploadFile(
            @RequestParam("file") MultipartFile file,
            @RequestParam(value = "folder", defaultValue = "images") String folder) {
        log.info("上传文件: {}, 文件夹: {}", file.getOriginalFilename(), folder);
        
        String url = ossUtil.uploadFile(file, folder);
        return FileUploadResponse.builder()
                .url(url)
                .fileName(file.getOriginalFilename())
                .fileSize(file.getSize())
                .fileType(file.getContentType())
                .build();
    }

    /**
     * 上传图片
     */
    @PostMapping(value = "/upload/image", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public FileUploadResponse uploadImage(@RequestParam("file") MultipartFile file) {
        String url = ossUtil.uploadImage(file);
        return FileUploadResponse.builder()
                .url(url)
                .fileName(file.getOriginalFilename())
                .fileSize(file.getSize())
                .fileType(file.getContentType())
                .build();
    }

    /**
     * 上传视频
     */
    @PostMapping(value = "/upload/video", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public FileUploadResponse uploadVideo(@RequestParam("file") MultipartFile file) {
        long startTime = System.currentTimeMillis();
        String url = ossUtil.uploadVideo(file);
        long elapsed = System.currentTimeMillis() - startTime;
        log.info("视频上传完成: {}, 大小: {}MB, 总耗时: {}ms",
                file.getOriginalFilename(),
                String.format("%.1f", file.getSize() / 1024.0 / 1024.0),
                elapsed);
        return FileUploadResponse.builder()
                .url(url)
                .fileName(file.getOriginalFilename())
                .fileSize(file.getSize())
                .fileType(file.getContentType())
                .build();
    }

    /**
     * 上传文档
     */
    @PostMapping(value = "/upload/document", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public FileUploadResponse uploadDocument(@RequestParam("file") MultipartFile file) {
        String url = ossUtil.uploadDocument(file);
        return FileUploadResponse.builder()
                .url(url)
                .fileName(file.getOriginalFilename())
                .fileSize(file.getSize())
                .fileType(file.getContentType())
                .build();
    }

    /**
     * 上传头像
     */
    @PostMapping(value = "/upload/avatar", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public FileUploadResponse uploadAvatar(@RequestParam("file") MultipartFile file) {
        String url = ossUtil.uploadAvatar(file);
        return FileUploadResponse.builder()
                .url(url)
                .fileName(file.getOriginalFilename())
                .fileSize(file.getSize())
                .fileType(file.getContentType())
                .build();
    }

    /**
     * 批量上传文件
     */
    @PostMapping(value = "/upload/batch", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public Map<String, Object> uploadFiles(
            @RequestParam("files") MultipartFile[] files,
            @RequestParam(value = "folder", defaultValue = "images") String folder) {
        log.info("批量上传文件数: {}, 文件夹: {}", files.length, folder);
        
        List<FileUploadResponse> responses = new ArrayList<>();
        for (MultipartFile file : files) {
            String url = ossUtil.uploadFile(file, folder);
            responses.add(FileUploadResponse.builder()
                    .url(url)
                    .fileName(file.getOriginalFilename())
                    .fileSize(file.getSize())
                    .fileType(file.getContentType())
                    .build());
        }
        
        Map<String, Object> result = new HashMap<>();
        result.put("successCount", responses.size());
        result.put("files", responses);
        return result;
    }

    /**
     * 批量上传图片
     */
    @PostMapping(value = "/upload/images", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public Map<String, Object> uploadImages(@RequestParam("files") MultipartFile[] files) {
        List<FileUploadResponse> responses = new ArrayList<>();
        for (MultipartFile file : files) {
            String url = ossUtil.uploadImage(file);
            responses.add(FileUploadResponse.builder()
                    .url(url)
                    .fileName(file.getOriginalFilename())
                    .fileSize(file.getSize())
                    .fileType(file.getContentType())
                    .build());
        }
        
        Map<String, Object> result = new HashMap<>();
        result.put("successCount", responses.size());
        result.put("urls", responses.stream().map(FileUploadResponse::getUrl).collect(Collectors.toList()));
        result.put("files", responses);
        return result;
    }

    /**
     * 删除文件
     */
    @DeleteMapping("/delete")
    public Map<String, String> deleteFile(@RequestParam("url") String url) {
        log.info("删除文件: {}", url);
        ossUtil.deleteFile(url);
        
        Map<String, String> result = new HashMap<>();
        result.put("message", "文件删除成功");
        result.put("url", url);
        return result;
    }

    /**
     * 批量删除文件
     */
    @DeleteMapping("/delete/batch")
    public Map<String, Object> deleteFiles(@RequestBody List<String> urls) {
        log.info("批量删除文件数: {}", urls.size());
        ossUtil.deleteFiles(urls);
        
        Map<String, Object> result = new HashMap<>();
        result.put("message", "文件批量删除成功");
        result.put("count", urls.size());
        result.put("urls", urls);
        return result;
    }
}