backend/models.py

from datetime import datetime
from typing import List, Dict
import json

class Message:
    def __init__(self, role: str, content: str, language: str = 'en'):
        self.role = role
        self.content = content
        self.language = language
        self.timestamp = datetime.now().isoformat()
    
    def to_dict(self):
        return {
            'role': self.role,
            'content': self.content,
            'language': self.language,
            'timestamp': self.timestamp
        }

class ConversationManager:
    def __init__(self):
        self.conversations: Dict[str, List[Message]] = {}
    
    def add_message(self, conversation_id: str, role: str, content: str, language: str = 'en'):
        """إضافة رسالة للمحادثة"""
        if conversation_id not in self.conversations:
            self.conversations[conversation_id] = []
        
        message = Message(role, content, language)
        self.conversations[conversation_id].append(message)
    
    def get_messages(self, conversation_id: str) -> List[Dict]:
        """الحصول على رسائل المحادثة"""
        if conversation_id not in self.conversations:
            return []
        
        return [msg.to_dict() for msg in self.conversations[conversation_id]]
    
    def get_context(self, conversation_id: str, limit: int = 10) -> List[Dict]:
        """الحصول على السياق (آخر n رسالة)"""
        messages = self.get_messages(conversation_id)
        return messages[-limit:] if len(messages) > limit else messages
    
    def get_all_conversations(self) -> List[Dict]:
        """الحصول على قائمة المحادثات"""
        conversations = []
        for conv_id, messages in self.conversations.items():
            if messages:
                conversations.append({
                    'id': conv_id,
                    'title': messages[0].content[:50] + '...' if len(messages[0].content) > 50 else messages[0].content,
                    'last_message': messages[-1].timestamp,
                    'message_count': len(messages)
                })
        return sorted(conversations, key=lambda x: x['last_message'], reverse=True)
    
    def delete_conversation(self, conversation_id: str):
        """حذف محادثة"""
        if conversation_id in self.conversations:
            del self.conversations[conversation_id]
    
    def get_last_timestamp(self, conversation_id: str) -> str:
        """الحصول على آخر وقت رسالة"""
        if conversation_id in self.conversations and self.conversations[conversation_id]:
            return self.conversations[conversation_id][-1].timestamp
        return datetime.now().isoformat()