package com.maternalmall.controller;

import com.maternalmall.common.ApiResponse;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.UUID;

@RestController
@RequestMapping("/api")
@CrossOrigin(origins = "*", allowedHeaders = "*", methods = {RequestMethod.GET, RequestMethod.POST, RequestMethod.PUT, RequestMethod.DELETE, RequestMethod.OPTIONS})
public class FileUploadController {

    @Value("${app.upload-path:./uploads}")
    private String uploadPath;

    @Value("${app.upload-url-prefix:/uploads}")
    private String uploadUrlPrefix;

    @PostMapping("/upload")
    public ApiResponse<String> uploadFile(@RequestParam("file") MultipartFile file) {
        if (file.isEmpty()) {
            return ApiResponse.fail("请选择要上传的文件", String.class);
        }

        try {
            // 创建上传目录
            Path uploadDir = Paths.get(uploadPath);
            if (!Files.exists(uploadDir)) {
                Files.createDirectories(uploadDir);
            }

            // 生成唯一文件名
            String originalFilename = file.getOriginalFilename();
            String extension = "";
            if (originalFilename != null && originalFilename.contains(".")) {
                extension = originalFilename.substring(originalFilename.lastIndexOf("."));
            }
            String newFilename = UUID.randomUUID().toString().replace("-", "") + extension;

            // 保存文件
            Path filePath = uploadDir.resolve(newFilename);
            file.transferTo(filePath.toFile());

            // 返回文件URL
            String fileUrl = uploadUrlPrefix + "/" + newFilename;
            return ApiResponse.ok(fileUrl);

        } catch (IOException e) {
            return ApiResponse.fail("文件上传失败: " + e.getMessage(), String.class);
        }
    }

    @PostMapping("/upload/image")
    public ApiResponse<String> uploadImage(@RequestParam("file") MultipartFile file) {
        if (file.isEmpty()) {
            return ApiResponse.fail("请选择要上传的图片", String.class);
        }

        // 检查文件类型
        String contentType = file.getContentType();
        if (contentType == null || !contentType.startsWith("image/")) {
            return ApiResponse.fail("只能上传图片文件", String.class);
        }

        return uploadFile(file);
    }
}