from datetime import datetime, timedelta, timezone
from typing import Any, Optional

from jose import jwt, JWTError
from passlib.context import CryptContext

from app.core.config import settings

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")


def hash_password(password: str) -> str:
    return pwd_context.hash(password)


def verify_password(plain: str, hashed: str) -> bool:
    return pwd_context.verify(plain, hashed)


def create_access_token(subject: str, claims: Optional[dict] = None,
                        expires_minutes: Optional[int] = None) -> str:
    expire = datetime.now(timezone.utc) + timedelta(
        minutes=expires_minutes or settings.access_token_expire_minutes
    )
    payload = {"sub": subject, "exp": expire, "type": "access"}
    if claims:
        payload.update(claims)
    return jwt.encode(payload, settings.secret_key, algorithm=settings.algorithm)


def create_token(subject: str, token_type: str, expires_minutes: int) -> str:
    """Generic signed token for email-verify / password-reset."""
    expire = datetime.now(timezone.utc) + timedelta(minutes=expires_minutes)
    payload = {"sub": subject, "exp": expire, "type": token_type}
    return jwt.encode(payload, settings.secret_key, algorithm=settings.algorithm)


def decode_token(token: str) -> Optional[dict]:
    try:
        return jwt.decode(token, settings.secret_key, algorithms=[settings.algorithm])
    except JWTError:
        return None