from typing import Dict, List, Optional
from dataclasses import dataclass
from datetime import datetime
import json

@dataclass
class MemoryLayer:
    """Memory layer definition"""
    name: str
    capacity: int
    ttl: int  # Time to live in seconds
    priority: int

class MemorySystem:
    def __init__(self):
        self.layers = {
            "working": MemoryLayer("working", 5, 300, 1),
            "short_term": MemoryLayer("short_term", 20, 3600, 2),
            "long_term": MemoryLayer("long_term", 100, 86400, 3)
        }
        self.memories: Dict[str, List[Dict]] = {
            layer: [] for layer in self.layers
        }

    async def add_memory(
        self, 
        content: Dict, 
        layer: str = "working"
    ):
        """Add new memory"""
        memory_item = {
            "content": content,
            "timestamp": datetime.now().timestamp(),
            "access_count": 0
        }

        await self._manage_capacity(layer)
        self.memories[layer].append(memory_item)

class MemoryManager:
    def __init__(self):
        self.memory_system = MemorySystem()
        self.embeddings = {}  # For semantic retrieval

    async def retrieve_relevant_context(
        self, 
        query: str, 
        k: int = 3
    ) -> List[Dict]:
        """Retrieve relevant context"""
        query_embedding = await self._get_embedding(query)
        relevant_memories = []

        for layer in ["working", "short_term", "long_term"]:
            memories = await self._search_layer(
                layer, 
                query_embedding, 
                k
            )
            relevant_memories.extend(memories)

        return self._rank_and_filter(
            relevant_memories, 
            k
        )

class DialogueManager:
    def __init__(self):
        self.memory_manager = MemoryManager()
        self.state_manager = StateManager()
        self.conversation_history = []

    async def process_input(
        self, 
        user_input: str, 
        context: Dict
    ) -> Dict:
        """Process user input"""
        # Get relevant context
        relevant_context = await self.memory_manager.retrieve_relevant_context(
            user_input
        )

        # Update dialogue state
        current_state = await self.state_manager.update_state(
            user_input,
            relevant_context
        )

        # Generate response
        response = await self._generate_response(
            user_input,
            current_state,
            relevant_context
        )

        # Update memory
        await self._update_conversation_memory(
            user_input,
            response,
            current_state
        )

        return response

class StateManager:
    def __init__(self):
        self.current_state = {
            "conversation_id": None,
            "turn_count": 0,
            "user_intent": None,
            "active_context": {},
            "pending_actions": []
        }
        self.state_history = []

    async def update_state(
        self, 
        user_input: str, 
        context: Dict
    ) -> Dict:
        """Update dialogue state"""
        # Analyze user intent
        intent = await self._analyze_intent(user_input)

        # Update state
        self.current_state.update({
            "turn_count": self.current_state["turn_count"] + 1,
            "user_intent": intent,
            "active_context": context
        })

        # Handle state transition
        await self._handle_state_transition(intent)

        # Record state history
        self.state_history.append(
            self.current_state.copy()
        )

        return self.current_state