import 'dart:io';

import 'package:path_provider/path_provider.dart';

class Message {
  final String sessionid; // 会话ID
  final bool isUser; //标识信息是否来自用户还是AI
  final String text; //信息文本内容
  final DateTime timestamp; // 消息时间戳
  final bool isRecognizing; // 是否为语音识别中的临时消息
  final bool hasImage; // 是否包含图片
  final String? imagePath; // 图片路径
  final Map? meta; //卡片数据
  final Map<String, Map<String, dynamic>>? functionCalls; // 函数调用
  bool isToolCallsExpanded; // 工具调用是否展开

  Message({
    // 构造函数
    required this.sessionid, // 会话ID
    required this.isUser,
    required this.text,
    DateTime? timestamp,
    this.isRecognizing = false,
    this.hasImage = false,
    this.imagePath,
    this.meta,
    this.functionCalls,
    this.isToolCallsExpanded = false, // 默认不展开
  }) : this.timestamp = timestamp ?? DateTime.now();

  // 从JSON构造函数
  factory Message.fromJson(Map<String, dynamic> json) {
    return Message(
      sessionid: json['sessionid'] as String, // 会话ID
      isUser: json['isUser'] as bool,
      text: json['text'] as String,
      timestamp: DateTime.parse(json['timestamp'] as String),
      isRecognizing: json['isRecognizing'] as bool? ?? false,
      hasImage: json['hasImage'] as bool? ?? false,
      imagePath: json['imagePath'] as String?,
      meta: json['meta'] as Map?,
      functionCalls:
          json['functionCalls'] as Map<String, Map<String, dynamic>>?,
      isToolCallsExpanded: json['isToolCallsExpanded'] as bool? ?? false,
    );
  }

  // 转换为JSON
  Map<String, dynamic> toJson() {
    return {
      'isUser': isUser,
      'text': text,
      'timestamp': timestamp.toIso8601String(),
      'isRecognizing': isRecognizing,
      'hasImage': hasImage,
      'imagePath': imagePath,
      'meta': meta,
      'functionCalls': functionCalls,
      'isToolCallsExpanded': isToolCallsExpanded,
    };
  }

  // 创建一个加载中的消息
  factory Message.loading() {
    return Message(
      sessionid: '', // 会话ID
      isUser: false,
      text: '',
      timestamp: DateTime.now(),
      isRecognizing: true,
    );
  }

  // 复制并修改
  Message copyWith({
    required String sessionid, // 会话ID
    bool? isUser,
    String? text,
    DateTime? timestamp,
    bool? isRecognizing,
    bool? hasImage,
    String? imagePath,
    Map? meta,
    Map<String, Map<String, dynamic>>? functionCalls,
    bool? isToolCallsExpanded,
  }) {
    return Message(
      sessionid: sessionid, // 会话ID
      isUser: isUser ?? this.isUser,
      text: text ?? this.text,
      timestamp: timestamp ?? this.timestamp,
      isRecognizing: isRecognizing ?? this.isRecognizing,
      hasImage: hasImage ?? this.hasImage,
      imagePath: imagePath ?? this.imagePath,
      meta: meta ?? this.meta,
      functionCalls: functionCalls ?? this.functionCalls,
      isToolCallsExpanded: isToolCallsExpanded ?? this.isToolCallsExpanded,
    );
  }

  // 切换工具调用展开状态
  void toggleToolCallsExpanded() {
    isToolCallsExpanded = !isToolCallsExpanded;
  }
}