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")

ALGORITHM = "HS256"
TOKEN_TYPE_ACCESS = "access"
TOKEN_TYPE_REFRESH = "refresh"


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(subject: str | Any, extra_claims: dict | None = None) -> str:
    expire = datetime.now(timezone.utc) + timedelta(
        minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
    )
    to_encode: dict[str, Any] = {
        "sub": str(subject),
        "exp": expire,
        "type": TOKEN_TYPE_ACCESS,
    }
    if extra_claims:
        to_encode.update(extra_claims)
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)


def create_refresh_token(subject: str | Any) -> str:
    expire = datetime.now(timezone.utc) + timedelta(
        days=settings.REFRESH_TOKEN_EXPIRE_DAYS
    )
    to_encode: dict[str, Any] = {
        "sub": str(subject),
        "exp": expire,
        "type": TOKEN_TYPE_REFRESH,
    }
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)


def decode_token(token: str) -> dict[str, Any]:
    """Decode and validate a JWT. Raises JWTError on failure."""
    payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[ALGORITHM])
    return payload