package com.backendsys.modules.upload.controller;

import cn.hutool.core.convert.Convert;
import com.backendsys.modules.common.config.security.utils.HttpRequestUtil;
import com.backendsys.modules.common.utils.Result;
import com.backendsys.modules.sse.emitter.SseEmitterManager;
import com.backendsys.modules.sse.utils.SseEmitterUTF8;
import com.backendsys.modules.upload.entity.SysUpload;
import com.backendsys.modules.upload.service.SysUploadService;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;

import java.io.IOException;

@Validated
@RestController
@Tag(name = "上传文件")
public class SysUploadController {

    @Autowired
    private HttpRequestUtil httpRequestUtil;
    @Autowired
    private SysUploadService sysUploadService;

    /**
     * 获取上传文件列表
     * - 缩略图 (?imageView2/1/w/100/h/100/q/60)
     */
    @GetMapping("/api/v2/upload/getUploadFileList")
    public Result getUploadFileList(@Validated SysUpload sysUpload) {
        return Result.success().put("data", sysUploadService.selectUploadList(sysUpload));
    }

    /**
     * 上传文件 (普通上传，单文件上传不超过 20MB)
     */
    @PreAuthorize("@ss.hasPermi(1.1)")
    @PostMapping("/api/upload/uploadSmall")
    public Result uploadSmall(@RequestParam("file") MultipartFile multipartFile, Long category_id) {
        return Result.success().put("data", sysUploadService.uploadSmall(multipartFile, category_id));
    }

    /**
     * [SSE] 上传进度监听
     */
    @GetMapping(value = "/api/sse/stream/upload", produces = "text/event-stream;charset=UTF-8")
    public SseEmitter streamUpload() {
        String userId = Convert.toStr(httpRequestUtil.getUserId());
        SseEmitterUTF8 emitter = new SseEmitterUTF8(Long.MAX_VALUE);
        SseEmitterManager manager = SseEmitterManager.getInstance();
        manager.addEmitter(userId, emitter);
        try {
            // 创建新连接
            manager.addEmitter(userId, emitter);
            emitter.send(SseEmitter.event().data("Connected successfully! (连接成功)"));
        } catch (IOException e) {
            // 关闭连接
            manager.emitters.remove(emitter);
        }
        return emitter;
    }
//    /**
//     * [SSE] 测试发送
//     */
//    @GetMapping("/api/v2/sse/send")
//    public String send() {
//        String message = "{\"message\": \"Hello World\"}";
//        sseUtil.send(httpRequestUtil.getUserId(), message);
//        return "success";
//    }

    /**
     * 删除上传文件
     */
    @PreAuthorize("@ss.hasPermi(1.1)")
    @DeleteMapping("/api/v2/upload/removeUploadFile")
    public Result removeUploadFile(@Validated(SysUpload.Delete.class) @RequestBody SysUpload sysUpload) {
        return Result.success().put("data", sysUploadService.removeUploadFile(sysUpload));
    }

}