from __future__ import annotations

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

import bcrypt
from jose import jwt

from app.core.config import settings


def hash_password(password: str) -> str:
    # Use bcrypt directly to avoid passlib<->bcrypt version incompatibilities (bcrypt>=4 removed __about__).
    salt = bcrypt.gensalt(rounds=12)
    return bcrypt.hashpw(password.encode("utf-8"), salt).decode("utf-8")


def verify_password(password: str, password_hash: str) -> bool:
    try:
        return bcrypt.checkpw(password.encode("utf-8"), password_hash.encode("utf-8"))
    except Exception:
        return False


def create_token(*, subject: str, token_type: str, expires_delta: timedelta, extra: dict[str, Any] | None = None) -> str:
    now = datetime.now(timezone.utc)
    payload: dict[str, Any] = {
        "sub": subject,
        "typ": token_type,
        "iat": int(now.timestamp()),
        "exp": int((now + expires_delta).timestamp()),
    }
    if extra:
        payload.update(extra)
    return jwt.encode(payload, settings.JWT_SECRET_KEY, algorithm=settings.JWT_ALGORITHM)


def create_access_token(user_id: str) -> str:
    return create_token(
        subject=user_id,
        token_type="access",
        expires_delta=timedelta(minutes=settings.ACCESS_TOKEN_EXPIRES_MINUTES),
    )


def create_refresh_token(user_id: str) -> str:
    return create_token(
        subject=user_id,
        token_type="refresh",
        expires_delta=timedelta(days=settings.REFRESH_TOKEN_EXPIRES_DAYS),
    )