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

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

from app.core.config import settings

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


def verify_password(plain_password: str, hashed_password: str) -> bool:
    return pwd_context.verify(plain_password, hashed_password)


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


def create_access_token(
    data: dict[str, Any],
    expires_delta: timedelta | None = None,
) -> str:
    to_encode = data.copy()
    expire = datetime.now(timezone.utc) + (
        expires_delta
        if expires_delta is not None
        else timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    )
    to_encode["exp"] = expire
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)


def create_llave_token(user_id: str, token_string: str) -> str:
    expire = datetime.now(timezone.utc) + timedelta(
        minutes=settings.LLAVE_EXPIRE_MINUTES
    )
    to_encode = {
        "sub": user_id,
        "token_string": token_string,
        "type": "llave",
        "exp": expire,
    }
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)


def decode_token(token: str) -> dict[str, Any]:
    return jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])


def decode_token_unverified(token: str) -> dict[str, Any]:
    """Decode without raising on expiry – use only for diagnostics."""
    return jwt.decode(
        token,
        settings.SECRET_KEY,
        algorithms=[settings.ALGORITHM],
        options={"verify_exp": False},
    )