ar_tourism_flutter_unity/lib/components/work_utils.dart

import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'dart:convert';
import 'package:dio/dio.dart';
import 'package:http_parser/http_parser.dart';
import 'package:wechat_assets_picker/wechat_assets_picker.dart';
import '../apis/app.dart';
import 'dart:io';
// 这是一个工具类，主要负责处理作品的保存逻辑：
// 1. 处理编辑模式的保存
// 2. 处理新建模式的保存
// 3. 处理保存成功后的提示
// 4. 处理保存失败后的提示
// 5. 处理保存成功后的跳转

class WorkUtils {
  static Future<void> handleEditSave(
    BuildContext context,
    Map<String, dynamic> content,
    String status,
  ) async {
    try {
      final asset = content['asset'];
      final isFromWorks = content['isFromWorks'] ?? false;
      final originalWorkAddress = content['workAddress'];
      print("原始图片地址: $originalWorkAddress");
      
      print("处理编辑保存 - 来自作品集: $isFromWorks");
      print("当前内容: $content");

      // 构建workDto参数
      final workDto = {
        "workId": content['workId'],
        "workname": content['workName'],
        "detail": content['detail'],
        "workstatus": status,
      };

      print("构建的workDto: $workDto");

      FormData formData;
      // 根据是否有新图片构建FormData
      if (asset != null) {
        // 如果有新图片，使用本地文件
        final file = await asset.file;
        print("文件-----------------: $file");
        if (file == null) throw "文件加载失败";

        formData = FormData.fromMap({
          "work": await MultipartFile.fromFile(
            file.path,
            filename: asset.type == AssetType.video ? "video.mp4" : "img.jpg",
            contentType: asset.type == AssetType.video
                ? MediaType("video", "mp4")
                : MediaType("image", "jpg"),
          ),
          "workDto": jsonEncode(workDto),
        });
      } else {
      
        if (originalWorkAddress == null) throw "原始图片地址不能为空";
        
        formData = FormData.fromMap({
          "work":  MultipartFile.fromBytes(
                          Uint8List(0), // 空字节数组
                          filename: "empty.txt",
                        ),
          "workDto": jsonEncode(workDto),
        });
      }

 
      // 使用editUserWork接口更新作品
      print("开始调用editUserWork接口");
      final editResult = await userApi.editUserWork(formData);
      print("接口返回结果: $editResult");
      
      if (editResult['code'] != 200) {
        throw editResult['msg'] ?? "保存失败";
      }
      
      if (!context.mounted) return;
      _handleSaveSuccess(context, status, isEdit: true);
    } catch (e) {
      print("发生错误: $e");
      if (!context.mounted) return;
      _showErrorSnackBar(context, e.toString());
      rethrow;
    }
  }

  // 处理新建作品的保存
  static Future<void> handleNewSave(
    BuildContext context,
    Map<String, dynamic> content,
    String status,
  ) async {
    try {
      if (content['asset'] == null) {
        throw "请先选择图片";
      }

      print("开始创建新作品");
      final file = await content['asset'].file;
      
      // 构建workDto参数
      var workDto = {
        "workname": content['workname'],
        "detail": content['detail'],
        "workstatus": status,
      };

      FormData formData = FormData.fromMap({
        "work": await MultipartFile.fromFile(
          file.path,
          filename: content['asset'].type == AssetType.video ? "video.mp4" : "img.jpg",
          contentType: content['asset'].type == AssetType.video
              ? MediaType("video", "mp4")
              : MediaType("image", "jpg"),
        ),
        "workDto": jsonEncode(workDto),
      });

      // 使用getUserWorks接口创建新作品
      final result = await userApi.getUserWorks(formData);
      print("创建作品结果：$result");
      
      if (result['code'] != 200) {
        throw result['msg'] ?? "创建失败";
      }

      if (!context.mounted) return;
      _handleSaveSuccess(context, status, isEdit: false);
    } catch (e) {
      if (!context.mounted) return;
      _showErrorSnackBar(context, e.toString());
      rethrow;
    }
  }

  static void _handleSaveSuccess(BuildContext context, String status, {required bool isEdit}) {
    if (status == "1") {
      if (isEdit) {
        // 从作品集编辑进入
        ScaffoldMessenger.of(context).showSnackBar(
          _buildSnackBar(context, "作品修改成功"),
        );
      } else {
        // 从相册创建新作品
        ScaffoldMessenger.of(context).showSnackBar(
          _buildSnackBar(context, "快来发布作品吧"),
        );
      }
    } else {
      ScaffoldMessenger.of(context).showSnackBar(
        _buildSnackBar(context, "存草稿成功"),
      );
    }
  }

  static void _showErrorSnackBar(BuildContext context, String error) {
    ScaffoldMessenger.of(context).showSnackBar(
      _buildSnackBar(
        context,
        '保存失败: $error',
        backgroundColor: Colors.red,
      ),
    );
  }

  static SnackBar _buildSnackBar(
    BuildContext context,
    String message, {
    Color backgroundColor = const Color(0xFF1A1A29),
  }) {
    return SnackBar(
      content: Text(
        message,
        style: const TextStyle(color: Colors.white),
        textAlign: TextAlign.center,
      ),
      backgroundColor: backgroundColor,
      behavior: SnackBarBehavior.floating,
      margin: EdgeInsets.only(
        bottom: MediaQuery.of(context).size.height * 0.7,
        left: 20,
        right: 20,
      ),
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(8),
      ),
      duration: const Duration(seconds: 2),
    );
  }
}