from datetime import datetime, timedelta
from typing import Optional, Dict, Any
from jose import JWTError, jwt
from app.config.settings import Config

config = Config()


def create_access_token(data: dict, additional_claims: Optional[Dict[str, Any]] = None, expires_delta: Optional[timedelta] = None):
    """Create JWT access token"""
    to_encode = data.copy()
    
    if additional_claims:
        to_encode.update(additional_claims)
    
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(minutes=config.JWT_ACCESS_TOKEN_EXPIRES)
    
    to_encode.update({"exp": expire, "type": "access"})
    
    encoded_jwt = jwt.encode(to_encode, config.JWT_SECRET_KEY, algorithm=config.JWT_ALGORITHM)
    return encoded_jwt


def create_refresh_token(data: dict, expires_delta: Optional[timedelta] = None):
    """Create JWT refresh token"""
    to_encode = data.copy()
    
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(days=config.JWT_REFRESH_TOKEN_EXPIRES)
    
    to_encode.update({"exp": expire, "type": "refresh"})
    
    encoded_jwt = jwt.encode(to_encode, config.JWT_SECRET_KEY, algorithm=config.JWT_ALGORITHM)
    return encoded_jwt


def decode_token(token: str) -> Dict[str, Any]:
    """Decode JWT token"""
    try:
        payload = jwt.decode(token, config.JWT_SECRET_KEY, algorithms=[config.JWT_ALGORITHM])
        return payload
    except JWTError:
        raise JWTError("Could not decode token")


def verify_token(token: str) -> bool:
    """Verify if token is valid"""
    try:
        decode_token(token)
        return True
    except JWTError:
        return False