"""
Utilitaires pour l'authentification et les tokens JWT.
"""

from datetime import datetime, timedelta
from typing import Optional
from jose import JWTError, jwt
import bcrypt
from .config import settings


def hash_password(password: str) -> str:
    """Hacher un mot de passe avec bcrypt"""
    salt = bcrypt.gensalt()
    return bcrypt.hashpw(password.encode(), salt).decode()


def verify_password(plain_password: str, hashed_password: str) -> bool:
    """Vérifier un mot de passe"""
    return bcrypt.checkpw(
        plain_password.encode(),
        hashed_password.encode()
    )


def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
    """Créer un token JWT"""
    to_encode = data.copy()
    
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(
            minutes=settings.access_token_expire_minutes
        )
    
    to_encode.update({"exp": expire})
    
    encoded_jwt = jwt.encode(
        to_encode,
        settings.secret_key,
        algorithm=settings.algorithm
    )
    
    return encoded_jwt


def verify_token(token: str) -> Optional[dict]:
    """Vérifier et décoder un token JWT"""
    try:
        payload = jwt.decode(
            token,
            settings.secret_key,
            algorithms=[settings.algorithm]
        )
        return payload
    except JWTError:
        return None