import logging
import datetime
from typing import Any, Dict, List, Optional, Tuple
import uuid

from config import config

class Transaction:
    """Class representing a token transaction."""
    
    def __init__(self, sender_id: Optional[str], recipient_id: str, amount: float, 
                transaction_type: str, description: str = ""):
        """Initialize a transaction."""
        self.id = str(uuid.uuid4())
        self.sender_id = sender_id  # None for system-generated tokens
        self.recipient_id = recipient_id
        self.amount = amount
        self.transaction_type = transaction_type
        self.description = description
        self.timestamp = datetime.datetime.now().isoformat()
        self.fee = 0.0
    
    def apply_fee(self, fee_rate: float) -> float:
        """Apply a transaction fee and return the fee amount."""
        if fee_rate <= 0:
            return 0.0
            
        self.fee = self.amount * fee_rate
        return self.fee
    
    def to_dict(self) -> Dict[str, Any]:
        """Convert transaction to dictionary."""
        return {
            "id": self.id,
            "sender_id": self.sender_id,
            "recipient_id": self.recipient_id,
            "amount": self.amount,
            "fee": self.fee,
            "transaction_type": self.transaction_type,
            "description": self.description,
            "timestamp": self.timestamp
        }


class TokenManager:
    """Class for managing the token economy."""
    
    def __init__(self):
        """Initialize the token manager."""
        self.transactions = []
        self.balances = {}  # agent_id -> balance
        self.staked_tokens = {}  # agent_id -> staked amount
        self.interest_rate = config.get("token_economy.interest_rate", 0.01)  # 1% per cycle
        self.transaction_fee = config.get("token_economy.transaction_fee", 0.001)  # 0.1%
        self.currency_name = config.get("token_economy.currency_name", "ANNAC")
        self.minimum_balance = config.get("token_economy.minimum_balance", 0.0)
        self.created_at = datetime.datetime.now().isoformat()
        self.logger = logging.getLogger("token_manager")
        self.logger.info(f"Token manager initialized with currency {self.currency_name}")
    
    def create_tokens(self, recipient_id: str, amount: float, reason: str = "") -> bool:
        """Create new tokens and assign to a recipient."""
        if amount <= 0:
            self.logger.warning(f"Cannot create non-positive amount: {amount}")
            return False
        
        # Create transaction
        transaction = Transaction(None, recipient_id, amount, "create", reason)
        self.transactions.append(transaction)
        
        # Update balance
        if recipient_id not in self.balances:
            self.balances[recipient_id] = 0.0
        self.balances[recipient_id] += amount
        
        self.logger.info(f"Created {amount} {self.currency_name} for {recipient_id}: {reason}")
        return True
    
    def transfer_tokens(self, sender_id: str, recipient_id: str, amount: float, 
                       description: str = "") -> bool:
        """Transfer tokens from one agent to another."""
        if amount <= 0:
            self.logger.warning(f"Cannot transfer non-positive amount: {amount}")
            return False
        
        if sender_id not in self.balances:
            self.logger.warning(f"Sender {sender_id} has no balance")
            return False
        
        # Apply transaction fee
        transaction = Transaction(sender_id, recipient_id, amount, "transfer", description)
        fee = transaction.apply_fee(self.transaction_fee)
        total_amount = amount + fee
        
        # Check if sender has sufficient balance
        if self.balances[sender_id] < total_amount:
            self.logger.warning(f"Sender {sender_id} has insufficient balance: {self.balances[sender_id]} < {total_amount}")
            return False
        
        # Check minimum balance requirement
        if self.balances[sender_id] - total_amount < self.minimum_balance:
            self.logger.warning(f"Transfer would put sender {sender_id} below minimum balance {self.minimum_balance}")
            return False
        
        # Update balances
        self.balances[sender_id] -= total_amount
        
        if recipient_id not in self.balances:
            self.balances[recipient_id] = 0.0
        self.balances[recipient_id] += amount
        
        # Record transaction
        self.transactions.append(transaction)
        
        self.logger.info(f"Transferred {amount} {self.currency_name} from {sender_id} to {recipient_id}" +
                        (f" (fee: {fee} {self.currency_name})" if fee > 0 else ""))
        return True
    
    def batch_transfer(self, sender_id: str, recipient_ids: List[str], amounts: List[float], 
                      descriptions: List[str] = None) -> bool:
        """Transfer tokens to multiple recipients in a single transaction."""
        if len(recipient_ids) != len(amounts):
            self.logger.warning("Recipient IDs and amounts must have the same length")
            return False
        
        if descriptions and len(descriptions) != len(recipient_ids):
            self.logger.warning("Descriptions must have the same length as recipient IDs")
            return False
        
        # Calculate total amount including fees
        total_amount = sum(amounts)
        total_fee = total_amount * self.transaction_fee
        
        # Check if sender has sufficient balance
        if sender_id not in self.balances:
            self.logger.warning(f"Sender {sender_id} has no balance")
            return False
        
        if self.balances[sender_id] < total_amount + total_fee:
            self.logger.warning(f"Sender {sender_id} has insufficient balance for batch transfer")
            return False
        
        # Check minimum balance requirement
        if self.balances[sender_id] - (total_amount + total_fee) < self.minimum_balance:
            self.logger.warning(f"Batch transfer would put sender {sender_id} below minimum balance {self.minimum_balance}")
            return False
        
        # Process transfers
        for i, (recipient_id, amount) in enumerate(zip(recipient_ids, amounts)):
            description = descriptions[i] if descriptions else ""
            
            # Create transaction
            transaction = Transaction(sender_id, recipient_id, amount, "batch_transfer", description)
            fee = amount * self.transaction_fee
            transaction.fee = fee
            self.transactions.append(transaction)
            
            # Update recipient balance
            if recipient_id not in self.balances:
                self.balances[recipient_id] = 0.0
            self.balances[recipient_id] += amount
        
        # Update sender balance
        self.balances[sender_id] -= (total_amount + total_fee)
        
        self.logger.info(f"Batch transferred {total_amount} {self.currency_name} from {sender_id} to {len(recipient_ids)} recipients" +
                        (f" (total fee: {total_fee} {self.currency_name})" if total_fee > 0 else ""))
        return True
    
    def stake_tokens(self, agent_id: str, amount: float) -> bool:
        """Stake tokens to earn interest."""
        if amount <= 0:
            self.logger.warning(f"Cannot stake non-positive amount: {amount}")
            return False
        
        if agent_id not in self.balances:
            self.logger.warning(f"Agent {agent_id} has no balance")
            return False
        
        if self.balances[agent_id] < amount:
            self.logger.warning(f"Agent {agent_id} has insufficient balance to stake {amount}")
            return False
        
        # Check minimum balance requirement
        if self.balances[agent_id] - amount < self.minimum_balance:
            self.logger.warning(f"Staking would put agent {agent_id} below minimum balance {self.minimum_balance}")
            return False
        
        # Update balances
        self.balances[agent_id] -= amount
        
        if agent_id not in self.staked_tokens:
            self.staked_tokens[agent_id] = 0.0
        self.staked_tokens[agent_id] += amount
        
        # Create transaction
        transaction = Transaction(agent_id, agent_id, amount, "stake", "Token staking")
        self.transactions.append(transaction)
        
        self.logger.info(f"Agent {agent_id} staked {amount} {self.currency_name}")
        return True
    
    def unstake_tokens(self, agent_id: str, amount: float) -> bool:
        """Unstake tokens."""
        if amount <= 0:
            self.logger.warning(f"Cannot unstake non-positive amount: {amount}")
            return False
        
        if agent_id not in self.staked_tokens:
            self.logger.warning(f"Agent {agent_id} has no staked tokens")
            return False
        
        if self.staked_tokens[agent_id] < amount:
            self.logger.warning(f"Agent {agent_id} has insufficient staked tokens: {self.staked_tokens[agent_id]} < {amount}")
            return False
        
        # Update balances
        self.staked_tokens[agent_id] -= amount
        
        if agent_id not in self.balances:
            self.balances[agent_id] = 0.0
        self.balances[agent_id] += amount
        
        # Create transaction
        transaction = Transaction(agent_id, agent_id, amount, "unstake", "Token unstaking")
        self.transactions.append(transaction)
        
        self.logger.info(f"Agent {agent_id} unstaked {amount} {self.currency_name}")
        return True
    
    def apply_interest(self) -> Dict[str, float]:
        """Apply interest to staked tokens."""
        interest_payments = {}
        
        for agent_id, staked_amount in self.staked_tokens.items():
            if staked_amount <= 0:
                continue
            
            interest = staked_amount * self.interest_rate
            
            # Update balance
            if agent_id not in self.balances:
                self.balances[agent_id] = 0.0
            self.balances[agent_id] += interest
            
            # Create transaction
            transaction = Transaction(None, agent_id, interest, "interest", "Interest on staked tokens")
            self.transactions.append(transaction)
            
            interest_payments[agent_id] = interest
            
            self.logger.info(f"Applied interest of {interest} {self.currency_name} to agent {agent_id}")
        
        return interest_payments
    
    def get_balance(self, agent_id: str) -> float:
        """Get an agent's token balance."""
        return self.balances.get(agent_id, 0.0)
    
    def get_staked_amount(self, agent_id: str) -> float:
        """Get an agent's staked token amount."""
        return self.staked_tokens.get(agent_id, 0.0)
    
    def get_total_supply(self) -> float:
        """Get the total token supply (balances + staked)."""
        total_balances = sum(self.balances.values())
        total_staked = sum(self.staked_tokens.values())
        return total_balances + total_staked
    
    def get_transaction_history(self, agent_id: Optional[str] = None, 
                              limit: Optional[int] = None) -> List[Dict[str, Any]]:
        """Get transaction history, optionally filtered by agent and limited."""
        if agent_id:
            filtered_transactions = [t.to_dict() for t in self.transactions 
                                   if t.sender_id == agent_id or t.recipient_id == agent_id]
        else:
            filtered_transactions = [t.to_dict() for t in self.transactions]
        
        if limit:
            return filtered_transactions[-limit:]
        return filtered_transactions
    
    def get_richest_agents(self, limit: int = 5) -> List[Tuple[str, float]]:
        """Get the agents with the highest token balances."""
        sorted_balances = sorted(self.balances.items(), key=lambda x: x[1], reverse=True)
        return sorted_balances[:limit]
    
    def to_dict(self) -> Dict[str, Any]:
        """Convert token manager to dictionary representation."""
        return {
            "currency_name": self.currency_name,
            "total_supply": self.get_total_supply(),
            "transaction_count": len(self.transactions),
            "agent_count": len(self.balances),
            "interest_rate": self.interest_rate,
            "transaction_fee": self.transaction_fee,
            "minimum_balance": self.minimum_balance,
            "created_at": self.created_at
        }