citu_vanna/react_agent/api.py

"""
Custom React Agent API 服务
提供RESTful接口用于智能问答
"""
import asyncio
import atexit
import os
import sys
from datetime import datetime
from typing import Optional, Dict, Any

# 🔧 修复模块路径问题：添加项目根目录到 sys.path
CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
PROJECT_ROOT = os.path.abspath(os.path.join(CURRENT_DIR, '..', '..'))
sys.path.insert(0, CURRENT_DIR)  # 当前目录优先
sys.path.insert(1, PROJECT_ROOT)  # 项目根目录

from flask import Flask, request, jsonify
import redis.asyncio as redis

try:
    # 尝试相对导入（当作为模块导入时）
    from .agent import CustomReactAgent
    from . import config
    from core.logging import get_react_agent_logger
except ImportError:
    # 如果相对导入失败，尝试绝对导入（直接运行时）
    from agent import CustomReactAgent
    import config
    from core.logging import get_react_agent_logger

# 使用独立日志系统
logger = get_react_agent_logger("ReactAgentAPI")

# 全局Agent实例
_agent_instance: Optional[CustomReactAgent] = None
_redis_client: Optional[redis.Redis] = None

def validate_request_data(data: Dict[str, Any]) -> Dict[str, Any]:
    """验证请求数据，并支持从thread_id中推断user_id"""
    errors = []
    
    # 验证 question（必填）
    question = data.get('question', '')
    if not question or not question.strip():
        errors.append('问题不能为空')
    elif len(question) > 2000:
        errors.append('问题长度不能超过2000字符')
    
    # 优先获取 thread_id
    thread_id = data.get('thread_id') or data.get('conversation_id')
    
    # 获取 user_id，但暂不设置默认值
    user_id = data.get('user_id')

    # 如果没有传递 user_id，则尝试从 thread_id 中推断
    if not user_id:
        if thread_id and ':' in thread_id:
            inferred_user_id = thread_id.split(':', 1)[0]
            if inferred_user_id:
                user_id = inferred_user_id
                logger.info(f"👤 未提供user_id，从 thread_id '{thread_id}' 中推断出: '{user_id}'")
            else:
                # 如果拆分结果为空，则使用默认值
                user_id = 'guest'
        else:
            # 如果 thread_id 不存在或格式不正确，则使用默认值
            user_id = 'guest'

    # 验证 user_id 长度
    if user_id and len(user_id) > 50:
        errors.append('用户ID长度不能超过50字符')
    
    # 用户ID与会话ID一致性校验
    if thread_id:
        if ':' not in thread_id:
            errors.append('会话ID格式无效，期望格式为 user_id:timestamp')
        else:
            thread_user_id = thread_id.split(':', 1)[0]
            if thread_user_id != user_id:
                errors.append(f'会话归属验证失败：会话ID [{thread_id}] 不属于当前用户 [{user_id}]')
    
    if errors:
        raise ValueError('; '.join(errors))
    
    return {
        'question': question.strip(),
        'user_id': user_id,
        'thread_id': thread_id  # 可选，不传则自动生成新会话
    }

async def initialize_agent():
    """异步初始化Agent"""
    global _agent_instance, _redis_client
    
    if _agent_instance is None:
        logger.info("🚀 正在异步初始化 Custom React Agent...")
        try:
            # 设置环境变量（checkpointer内部需要）
            os.environ['REDIS_URL'] = config.REDIS_URL
            
            # 初始化共享的Redis客户端
            _redis_client = redis.from_url(config.REDIS_URL, decode_responses=True)
            await _redis_client.ping()
            logger.info("✅ Redis客户端连接成功")
            
            _agent_instance = await CustomReactAgent.create()
            logger.info("✅ Agent 异步初始化完成")
        except Exception as e:
            logger.error(f"❌ Agent 异步初始化失败: {e}")
            raise

async def ensure_agent_ready():
    """异步确保Agent实例可用"""
    global _agent_instance
    
    if _agent_instance is None:
        await initialize_agent()
    
    # 测试Agent是否还可用
    try:
        # 简单测试 - 尝试获取一个不存在用户的对话（应该返回空列表）
        test_result = await _agent_instance.get_user_recent_conversations("__test__", 1)
        return True
    except Exception as e:
        logger.warning(f"⚠️ Agent实例不可用: {e}")
        # 重新创建Agent实例
        _agent_instance = None
        await initialize_agent()
        return True

# 删除复杂的事件循环管理函数 - 不再需要

async def cleanup_agent():
    """异步清理Agent资源"""
    global _agent_instance, _redis_client
    
    if _agent_instance:
        await _agent_instance.close()
        logger.info("✅ Agent 资源已异步清理")
        _agent_instance = None
    
    if _redis_client:
        await _redis_client.aclose()
        logger.info("✅ Redis客户端已异步关闭")
        _redis_client = None

# 创建Flask应用
app = Flask(__name__)

# 简化的退出处理
def cleanup_on_exit():
    """程序退出时的清理函数"""
    logger.info("程序退出，资源清理将在异步上下文中进行")

atexit.register(cleanup_on_exit)

@app.route("/")
def root():
    """健康检查端点"""
    return jsonify({"message": "Custom React Agent API 服务正在运行"})

@app.route('/health', methods=['GET'])
def health_check():
    """健康检查端点"""
    try:
        health_status = {
            "status": "healthy",
            "agent_initialized": _agent_instance is not None,
            "timestamp": datetime.now().isoformat()
        }
        return jsonify(health_status), 200
    except Exception as e:
        logger.error(f"健康检查失败: {e}")
        return jsonify({"status": "unhealthy", "error": str(e)}), 500

@app.route("/api/chat", methods=["POST"])
async def chat_endpoint():
    """异步智能问答接口"""
    global _agent_instance
    
    # 确保Agent已初始化
    if not await ensure_agent_ready():
        return jsonify({
            "code": 503,
            "message": "服务未就绪",
            "success": False,
            "error": "Agent 初始化失败"
        }), 503
    
    try:
        # 获取请求数据，处理JSON解析错误
        try:
            data = request.get_json(force=True)
        except Exception as json_error:
            logger.warning(f"⚠️ JSON解析失败: {json_error}")
            return jsonify({
                "code": 400,
                "message": "请求格式错误",
                "success": False,
                "error": "无效的JSON格式，请检查请求体中是否存在语法错误（如多余的逗号、引号不匹配等）",
                "details": str(json_error)
            }), 400
        
        if not data:
            return jsonify({
                "code": 400,
                "message": "请求参数错误",
                "success": False,
                "error": "请求体不能为空"
            }), 400
        
        # 验证请求数据
        validated_data = validate_request_data(data)
        
        logger.info(f"📨 收到请求 - User: {validated_data['user_id']}, Question: {validated_data['question'][:50]}...")
        
        # 直接调用异步方法，不需要事件循环包装
        agent_result = await _agent_instance.chat(
            message=validated_data['question'],
            user_id=validated_data['user_id'],
            thread_id=validated_data['thread_id']
        )
        
        if not agent_result.get("success", False):
            # Agent处理失败
            error_msg = agent_result.get("error", "Agent处理失败")
            logger.error(f"❌ Agent处理失败: {error_msg}")
            
            return jsonify({
                "code": 500,
                "message": "处理失败",
                "success": False,
                "error": error_msg,
                "data": {
                    "conversation_id": agent_result.get("thread_id"),  # 新增：conversation_id等于thread_id
                    "user_id": validated_data['user_id'],  # 新增：返回用户ID
                    "react_agent_meta": {
                        "thread_id": agent_result.get("thread_id"),
                        "agent_version": "custom_react_v1_async",
                        "execution_path": ["error"]
                    },
                    "timestamp": datetime.now().isoformat()
                }
            }), 500
        
        # Agent处理成功，按照设计文档格式化响应
        api_data = agent_result.get("api_data", {})
        
        # 构建符合设计文档的响应数据
        response_data = {
            "response": api_data.get("response", ""),
            "conversation_id": agent_result.get("thread_id"),  # 新增：conversation_id等于thread_id
            "user_id": validated_data['user_id'],  # 新增：返回用户ID
            "react_agent_meta": api_data.get("react_agent_meta", {
                "thread_id": agent_result.get("thread_id"),
                "agent_version": "custom_react_v1"
            }),
            "timestamp": datetime.now().isoformat()
        }
        
        # 可选字段：SQL（仅当执行SQL时存在）
        if "sql" in api_data:
            response_data["sql"] = api_data["sql"]
        
        # 可选字段：records（仅当有查询结果时存在）
        if "records" in api_data:
            response_data["records"] = api_data["records"]
        
        logger.info(f"✅ 请求处理成功 - Thread: {response_data['react_agent_meta'].get('thread_id')}")
        
        return jsonify({
            "code": 200,
            "message": "操作成功",
            "success": True,
            "data": response_data
        })
        
    except ValueError as e:
        # 参数验证错误
        error_msg = str(e)
        logger.warning(f"⚠️ 参数验证失败: {error_msg}")
        
        # 根据错误类型提供更友好的消息
        if "会话归属验证失败" in error_msg:
            message = "会话归属验证失败"
        elif "会话ID格式无效" in error_msg:
            message = "会话ID格式无效"
        elif "JSON格式" in error_msg:
            message = "请求格式错误"
        else:
            message = "请求参数错误"
        
        return jsonify({
            "code": 400,
            "message": message,
            "success": False,
            "error": error_msg,
            "error_type": "validation_error"
        }), 400
        
    except Exception as e:
        # 其他未预期的错误
        logger.error(f"❌ 未预期的错误: {e}", exc_info=True)
        return jsonify({
            "code": 500,
            "message": "服务器内部错误", 
            "success": False,
            "error": "系统异常，请稍后重试"
        }), 500

@app.route('/api/v0/react/users/<user_id>/conversations', methods=['GET'])
async def get_user_conversations(user_id: str):
    """异步获取用户的聊天记录列表"""
    global _agent_instance
    
    try:
        # 获取查询参数
        limit = request.args.get('limit', 10, type=int)
        
        # 限制limit的范围
        limit = max(1, min(limit, 50))  # 限制在1-50之间
        
        logger.info(f"📋 异步获取用户 {user_id} 的对话列表，限制 {limit} 条")
        
        # 确保Agent可用
        if not await ensure_agent_ready():
            return jsonify({
                "success": False,
                "error": "Agent 未就绪",
                "timestamp": datetime.now().isoformat()
            }), 503
        
        # 直接调用异步方法
        conversations = await _agent_instance.get_user_recent_conversations(user_id, limit)
        
        return jsonify({
            "success": True,
            "data": {
                "user_id": user_id,
                "conversations": conversations,
                "total_count": len(conversations),
                "limit": limit
            },
            "timestamp": datetime.now().isoformat()
        }), 200
        
    except Exception as e:
        logger.error(f"❌ 异步获取用户 {user_id} 对话列表失败: {e}")
        return jsonify({
            "success": False,
            "error": str(e),
            "timestamp": datetime.now().isoformat()
        }), 500

@app.route('/api/v0/react/users/<user_id>/conversations/<thread_id>', methods=['GET'])
async def get_user_conversation_detail(user_id: str, thread_id: str):
    """异步获取特定对话的详细历史"""
    global _agent_instance
    
    try:
        # 验证thread_id格式是否匹配user_id
        if not thread_id.startswith(f"{user_id}:"):
            return jsonify({
                "success": False,
                "error": f"Thread ID {thread_id} 不属于用户 {user_id}",
                "timestamp": datetime.now().isoformat()
            }), 400
        
        logger.info(f"📖 异步获取用户 {user_id} 的对话 {thread_id} 详情")
        
        # 确保Agent可用
        if not await ensure_agent_ready():
            return jsonify({
                "success": False,
                "error": "Agent 未就绪",
                "timestamp": datetime.now().isoformat()
            }), 503
        
        # 直接调用异步方法
        history = await _agent_instance.get_conversation_history(thread_id)
        logger.info(f"✅ 异步成功获取对话历史，消息数量: {len(history)}")
        
        if not history:
            return jsonify({
                "success": False,
                "error": f"未找到对话 {thread_id}",
                "timestamp": datetime.now().isoformat()
            }), 404
        
        return jsonify({
            "success": True,
            "data": {
                "user_id": user_id,
                "thread_id": thread_id,
                "message_count": len(history),
                "messages": history
            },
            "timestamp": datetime.now().isoformat()
        }), 200
        
    except Exception as e:
        import traceback
        logger.error(f"❌ 异步获取对话 {thread_id} 详情失败: {e}")
        logger.error(f"❌ 详细错误信息: {traceback.format_exc()}")
        return jsonify({
            "success": False,
            "error": str(e),
            "timestamp": datetime.now().isoformat()
        }), 500

# 简单Redis查询函数（测试用）
def get_user_conversations_simple_sync(user_id: str, limit: int = 10):
    """直接从Redis获取用户对话，测试版本"""
    import redis
    import json
    
    try:
        # 创建Redis连接
        redis_client = redis.Redis(
            host=config.REDIS_HOST,
            port=config.REDIS_PORT,
            db=config.REDIS_DB,
            password=config.REDIS_PASSWORD,
            decode_responses=True
        )
        redis_client.ping()
        
        # 扫描用户的checkpoint keys
        pattern = f"checkpoint:{user_id}:*"
        logger.info(f"🔍 扫描模式: {pattern}")
        
        keys = []
        cursor = 0
        while True:
            cursor, batch = redis_client.scan(cursor=cursor, match=pattern, count=1000)
            keys.extend(batch)
            if cursor == 0:
                break
        
        logger.info(f"📋 找到 {len(keys)} 个keys")
        
        # 解析thread信息
        thread_data = {}
        for key in keys:
            try:
                parts = key.split(':')
                if len(parts) >= 4:
                    thread_id = f"{parts[1]}:{parts[2]}"  # user_id:timestamp
                    timestamp = parts[2]
                    
                    if thread_id not in thread_data:
                        thread_data[thread_id] = {
                            "thread_id": thread_id,
                            "timestamp": timestamp,
                            "keys": []
                        }
                    thread_data[thread_id]["keys"].append(key)
            except Exception as e:
                logger.warning(f"解析key失败 {key}: {e}")
                continue
        
        logger.info(f"📊 找到 {len(thread_data)} 个thread")
        
        # 按时间戳排序
        sorted_threads = sorted(
            thread_data.values(),
            key=lambda x: x["timestamp"],
            reverse=True
        )[:limit]
        
        # 获取每个thread的详细信息
        conversations = []
        for thread_info in sorted_threads:
            try:
                thread_id = thread_info["thread_id"]
                
                # 获取最新的checkpoint数据
                latest_key = max(thread_info["keys"])
                
                # 先检查key的数据类型
                key_type = redis_client.type(latest_key)
                logger.info(f"🔍 Key {latest_key} 的类型: {key_type}")
                
                data = None
                if key_type == 'string':
                    data = redis_client.get(latest_key)
                elif key_type == 'hash':
                    # 如果是hash类型，获取所有字段
                    hash_data = redis_client.hgetall(latest_key)
                    logger.info(f"🔍 Hash字段: {list(hash_data.keys())}")
                    # 尝试获取可能的数据字段
                    for field in ['data', 'state', 'value', 'checkpoint']:
                        if field in hash_data:
                            data = hash_data[field]
                            break
                    if not data and hash_data:
                        # 如果没找到预期字段，取第一个值试试
                        data = list(hash_data.values())[0]
                elif key_type == 'list':
                    # 如果是list类型，获取最后一个元素
                    data = redis_client.lindex(latest_key, -1)
                elif key_type == 'ReJSON-RL':
                    # 这是RedisJSON类型，使用JSON.GET命令
                    logger.info(f"🔍 使用JSON.GET获取RedisJSON数据")
                    try:
                        # 使用JSON.GET命令获取整个JSON对象
                        json_data = redis_client.execute_command('JSON.GET', latest_key)
                        if json_data:
                            data = json_data  # JSON.GET返回的就是JSON字符串
                            logger.info(f"🔍 JSON数据长度: {len(data)} 字符")
                        else:
                            logger.warning(f"⚠️ JSON.GET 返回空数据")
                            continue
                    except Exception as json_error:
                        logger.error(f"❌ JSON.GET 失败: {json_error}")
                        continue
                else:
                    logger.warning(f"⚠️ 未知的key类型: {key_type}")
                    continue
                
                if data:
                    try:
                        checkpoint_data = json.loads(data)
                        
                        # 调试：查看JSON数据结构
                        logger.info(f"🔍 JSON顶级keys: {list(checkpoint_data.keys())}")
                        
                        # 根据您提供的JSON结构，消息在 checkpoint.channel_values.messages
                        messages = []
                        
                        # 首先检查是否有checkpoint字段
                        if 'checkpoint' in checkpoint_data:
                            checkpoint = checkpoint_data['checkpoint']
                            if isinstance(checkpoint, dict) and 'channel_values' in checkpoint:
                                channel_values = checkpoint['channel_values']
                                if isinstance(channel_values, dict) and 'messages' in channel_values:
                                    messages = channel_values['messages']
                                    logger.info(f"🔍 找到messages: {len(messages)} 条消息")
                        
                        # 如果没有checkpoint字段，尝试直接在channel_values
                        if not messages and 'channel_values' in checkpoint_data:
                            channel_values = checkpoint_data['channel_values']
                            if isinstance(channel_values, dict) and 'messages' in channel_values:
                                messages = channel_values['messages']
                                logger.info(f"🔍 找到messages(直接路径): {len(messages)} 条消息")
                        
                        # 生成对话预览
                        preview = "空对话"
                        if messages:
                            for msg in messages:
                                # 处理LangChain消息格式：{"lc": 1, "type": "constructor", "id": ["langchain", "schema", "messages", "HumanMessage"], "kwargs": {"content": "...", "type": "human"}}
                                if isinstance(msg, dict):
                                    # 检查是否是LangChain格式的HumanMessage
                                    if (msg.get('lc') == 1 and 
                                        msg.get('type') == 'constructor' and 
                                        'id' in msg and 
                                        isinstance(msg['id'], list) and 
                                        len(msg['id']) >= 4 and
                                        msg['id'][3] == 'HumanMessage' and
                                        'kwargs' in msg):
                                        
                                        kwargs = msg['kwargs']
                                        if kwargs.get('type') == 'human' and 'content' in kwargs:
                                            content = str(kwargs['content'])
                                            preview = content[:50] + "..." if len(content) > 50 else content
                                            break
                                    # 兼容其他格式
                                    elif msg.get('type') == 'human' and 'content' in msg:
                                        content = str(msg['content'])
                                        preview = content[:50] + "..." if len(content) > 50 else content
                                        break
                        
                        conversations.append({
                            "thread_id": thread_id,
                            "user_id": user_id,
                            "timestamp": thread_info["timestamp"],
                            "message_count": len(messages),
                            "conversation_preview": preview
                        })
                        
                    except json.JSONDecodeError:
                        logger.error(f"❌ JSON解析失败，数据类型: {type(data)}, 长度: {len(str(data))}")
                        logger.error(f"❌ 数据开头: {str(data)[:200]}...")
                        continue
                    
            except Exception as e:
                logger.error(f"处理thread {thread_info['thread_id']} 失败: {e}")
                continue
        
        redis_client.close()
        logger.info(f"✅ 返回 {len(conversations)} 个对话")
        return conversations
        
    except Exception as e:
        logger.error(f"❌ Redis查询失败: {e}")
        return []

@app.route('/api/test/redis', methods=['GET'])
def test_redis_connection():
    """测试Redis连接和基本查询"""
    try:
        import redis
        
        # 创建Redis连接
        r = redis.Redis(
            host=config.REDIS_HOST,
            port=config.REDIS_PORT,
            db=config.REDIS_DB,
            password=config.REDIS_PASSWORD,
            decode_responses=True
        )
        r.ping()
        
        # 扫描checkpoint keys
        pattern = "checkpoint:*"
        keys = []
        cursor = 0
        count = 0
        
        while True:
            cursor, batch = r.scan(cursor=cursor, match=pattern, count=100)
            keys.extend(batch)
            count += len(batch)
            if cursor == 0 or count > 500:  # 限制扫描数量
                break
        
        # 统计用户
        users = {}
        for key in keys:
            try:
                parts = key.split(':')
                if len(parts) >= 2:
                    user_id = parts[1]
                    users[user_id] = users.get(user_id, 0) + 1
            except:
                continue
        
        r.close()
        
        return jsonify({
            "success": True,
            "data": {
                "redis_connected": True,
                "total_checkpoint_keys": len(keys),
                "users_found": list(users.keys()),
                "user_key_counts": users,
                "sample_keys": keys[:5] if keys else []
            },
            "timestamp": datetime.now().isoformat()
        }), 200
        
    except Exception as e:
        logger.error(f"❌ Redis测试失败: {e}")
        return jsonify({
            "success": False,
            "error": str(e),
            "timestamp": datetime.now().isoformat()
        }), 500

@app.route('/api/v0/react/direct/users/<user_id>/conversations', methods=['GET'])
def test_get_user_conversations_simple(user_id: str):
    """测试简单Redis查询获取用户对话列表"""
    try:
        limit = request.args.get('limit', 10, type=int)
        limit = max(1, min(limit, 50))
        
        logger.info(f"🧪 测试获取用户 {user_id} 的对话列表（简单Redis方式）")
        
        # 使用简单Redis查询
        conversations = get_user_conversations_simple_sync(user_id, limit)
        
        return jsonify({
            "success": True,
            "method": "simple_redis_query",
            "data": {
                "user_id": user_id,
                "conversations": conversations,
                "total_count": len(conversations),
                "limit": limit
            },
            "timestamp": datetime.now().isoformat()
        }), 200
        
    except Exception as e:
        logger.error(f"❌ 测试简单Redis查询失败: {e}")
        return jsonify({
            "success": False,
            "error": str(e),
            "timestamp": datetime.now().isoformat()
        }), 500
    

# 在 api.py 文件顶部的导入部分添加：
try:
    from .enhanced_redis_api import get_conversation_detail_from_redis
except ImportError:
    from enhanced_redis_api import get_conversation_detail_from_redis

# 在 api.py 文件中添加以下新路由：

@app.route('/api/v0/react/direct/conversations/<thread_id>', methods=['GET'])
def get_conversation_detail_api(thread_id: str):
    """
    获取特定对话的详细信息 - 支持include_tools开关参数
    
    Query Parameters:
        - include_tools: bool, 是否包含工具调用信息，默认false
                        true: 返回完整对话（human/ai/tool/system）
                        false: 只返回human/ai消息，清理工具调用信息
        - user_id: str, 可选的用户ID验证
        
    Examples:
        GET /api/conversations/wang:20250709195048728?include_tools=true   # 完整模式
        GET /api/conversations/wang:20250709195048728?include_tools=false  # 简化模式（默认）
        GET /api/conversations/wang:20250709195048728                      # 简化模式（默认）
    """
    try:
        # 获取查询参数
        include_tools = request.args.get('include_tools', 'false').lower() == 'true'
        user_id = request.args.get('user_id')
        
        # 验证thread_id格式
        if ':' not in thread_id:
            return jsonify({
                "success": False,
                "error": "Invalid thread_id format. Expected format: user_id:timestamp",
                "timestamp": datetime.now().isoformat()
            }), 400
        
        # 如果提供了user_id，验证thread_id是否属于该用户
        thread_user_id = thread_id.split(':')[0]
        if user_id and thread_user_id != user_id:
            return jsonify({
                "success": False,
                "error": f"Thread ID {thread_id} does not belong to user {user_id}",
                "timestamp": datetime.now().isoformat()
            }), 400
        
        logger.info(f"📖 获取对话详情 - Thread: {thread_id}, Include Tools: {include_tools}")
        
        # 从Redis获取对话详情（使用我们的新函数）
        result = get_conversation_detail_from_redis(thread_id, include_tools)
        
        if not result['success']:
            logger.warning(f"⚠️ 获取对话详情失败: {result['error']}")
            return jsonify({
                "success": False,
                "error": result['error'],
                "timestamp": datetime.now().isoformat()
            }), 404
        
        # 添加API元数据
        result['data']['api_metadata'] = {
            "timestamp": datetime.now().isoformat(),
            "api_version": "v1",
            "endpoint": "get_conversation_detail",
            "query_params": {
                "include_tools": include_tools,
                "user_id": user_id
            }
        }
        
        mode_desc = "完整模式" if include_tools else "简化模式"
        logger.info(f"✅ 成功获取对话详情 - Messages: {result['data']['message_count']}, Mode: {mode_desc}")
        
        return jsonify({
            "success": True,
            "data": result['data'],
            "timestamp": datetime.now().isoformat()
        }), 200
        
    except Exception as e:
        import traceback
        logger.error(f"❌ 获取对话详情异常: {e}")
        logger.error(f"❌ 详细错误信息: {traceback.format_exc()}")
        
        return jsonify({
            "success": False,
            "error": str(e),
            "timestamp": datetime.now().isoformat()
        }), 500

@app.route('/api/v0/react/direct/conversations/<thread_id>/compare', methods=['GET'])
def compare_conversation_modes_api(thread_id: str):
    """
    比较完整模式和简化模式的对话内容
    用于调试和理解两种模式的差异
    
    Examples:
        GET /api/conversations/wang:20250709195048728/compare
    """
    try:
        logger.info(f"🔍 比较对话模式 - Thread: {thread_id}")
        
        # 获取完整模式
        full_result = get_conversation_detail_from_redis(thread_id, include_tools=True)
        
        # 获取简化模式
        simple_result = get_conversation_detail_from_redis(thread_id, include_tools=False)
        
        if not (full_result['success'] and simple_result['success']):
            return jsonify({
                "success": False,
                "error": "无法获取对话数据进行比较",
                "timestamp": datetime.now().isoformat()
            }), 404
        
        # 构建比较结果
        comparison = {
            "thread_id": thread_id,
            "full_mode": {
                "message_count": full_result['data']['message_count'],
                "stats": full_result['data']['stats'],
                "sample_messages": full_result['data']['messages'][:3]  # 只显示前3条作为示例
            },
            "simple_mode": {
                "message_count": simple_result['data']['message_count'],
                "stats": simple_result['data']['stats'],
                "sample_messages": simple_result['data']['messages'][:3]  # 只显示前3条作为示例
            },
            "comparison_summary": {
                "message_count_difference": full_result['data']['message_count'] - simple_result['data']['message_count'],
                "tools_filtered_out": full_result['data']['stats'].get('tool_messages', 0),
                "ai_messages_with_tools": full_result['data']['stats'].get('messages_with_tools', 0),
                "filtering_effectiveness": "有效" if (full_result['data']['message_count'] - simple_result['data']['message_count']) > 0 else "无差异"
            },
            "metadata": {
                "timestamp": datetime.now().isoformat(),
                "note": "sample_messages 只显示前3条消息作为示例，完整消息请使用相应的详情API"
            }
        }
        
        logger.info(f"✅ 模式比较完成 - 完整: {comparison['full_mode']['message_count']}, 简化: {comparison['simple_mode']['message_count']}")
        
        return jsonify({
            "success": True,
            "data": comparison,
            "timestamp": datetime.now().isoformat()
        }), 200
        
    except Exception as e:
        logger.error(f"❌ 对话模式比较失败: {e}")
        return jsonify({
            "success": False,
            "error": str(e),
            "timestamp": datetime.now().isoformat()
        }), 500

@app.route('/api/v0/react/direct/conversations/<thread_id>/summary', methods=['GET'])
def get_conversation_summary_api(thread_id: str):
    """
    获取对话摘要信息（只包含基本统计，不返回具体消息）
    
    Query Parameters:
        - include_tools: bool, 影响统计信息的计算方式
        
    Examples:
        GET /api/conversations/wang:20250709195048728/summary?include_tools=true
    """
    try:
        include_tools = request.args.get('include_tools', 'false').lower() == 'true'
        
        # 验证thread_id格式
        if ':' not in thread_id:
            return jsonify({
                "success": False,
                "error": "Invalid thread_id format. Expected format: user_id:timestamp",
                "timestamp": datetime.now().isoformat()
            }), 400
        
        logger.info(f"📊 获取对话摘要 - Thread: {thread_id}, Include Tools: {include_tools}")
        
        # 获取完整对话信息
        result = get_conversation_detail_from_redis(thread_id, include_tools)
        
        if not result['success']:
            return jsonify({
                "success": False,
                "error": result['error'],
                "timestamp": datetime.now().isoformat()
            }), 404
        
        # 只返回摘要信息，不包含具体消息
        data = result['data']
        summary = {
            "thread_id": data['thread_id'],
            "user_id": data['user_id'],
            "include_tools": data['include_tools'],
            "message_count": data['message_count'],
            "stats": data['stats'],
            "metadata": data['metadata'],
            "first_message_preview": None,
            "last_message_preview": None,
            "conversation_preview": None
        }
        
        # 添加消息预览
        messages = data.get('messages', [])
        if messages:
            # 第一条human消息预览
            for msg in messages:
                if msg['type'] == 'human':
                    content = str(msg['content'])
                    summary['first_message_preview'] = content[:100] + "..." if len(content) > 100 else content
                    break
            
            # 最后一条ai消息预览
            for msg in reversed(messages):
                if msg['type'] == 'ai' and msg.get('content', '').strip():
                    content = str(msg['content'])
                    summary['last_message_preview'] = content[:100] + "..." if len(content) > 100 else content
                    break
            
            # 生成对话预览（第一条human消息）
            summary['conversation_preview'] = summary['first_message_preview']
        
        # 添加API元数据
        summary['api_metadata'] = {
            "timestamp": datetime.now().isoformat(),
            "api_version": "v1",
            "endpoint": "get_conversation_summary"
        }
        
        logger.info(f"✅ 成功获取对话摘要")
        
        return jsonify({
            "success": True,
            "data": summary,
            "timestamp": datetime.now().isoformat()
        }), 200
        
    except Exception as e:
        logger.error(f"❌ 获取对话摘要失败: {e}")
        return jsonify({
            "success": False,
            "error": str(e),
            "timestamp": datetime.now().isoformat()
        }), 500


# 为了支持独立运行
if __name__ == "__main__":
    try:
        # 尝试使用ASGI模式启动（推荐）
        import uvicorn
        from asgiref.wsgi import WsgiToAsgi
        
        logger.info("🚀 使用ASGI模式启动异步Flask应用...")
        logger.info("   这将解决事件循环冲突问题，支持LangGraph异步checkpoint保存")
        
        # 将Flask WSGI应用转换为ASGI应用
        asgi_app = WsgiToAsgi(app)
        
        # 信号处理
        import signal
        
        def signal_handler(signum, frame):
            logger.info("🛑 收到关闭信号，开始清理...")
            logger.info("正在关闭服务...")
            exit(0)
        
        signal.signal(signal.SIGINT, signal_handler)
        signal.signal(signal.SIGTERM, signal_handler)
        
        # 使用uvicorn启动ASGI应用
        uvicorn.run(
            asgi_app,
            host="0.0.0.0",
            port=8000,
            log_level="info",
            access_log=True
        )
        
    except ImportError as e:
        # 如果缺少ASGI依赖，fallback到传统Flask模式
        logger.warning("⚠️ ASGI依赖缺失，使用传统Flask模式启动")
        logger.warning("   建议安装: pip install uvicorn asgiref")
        logger.warning("   传统模式可能存在异步事件循环冲突问题")
        
        # 信号处理
        import signal
        
        def signal_handler(signum, frame):
            logger.info("🛑 收到关闭信号，开始清理...")
            logger.info("正在关闭服务...")
            exit(0)
        
        signal.signal(signal.SIGINT, signal_handler)
        signal.signal(signal.SIGTERM, signal_handler)
        
        # 启动传统Flask应用
        app.run(host="0.0.0.0", port=8000, debug=False, threaded=True)