import hashlib
import secrets
import uuid
from datetime import datetime, timedelta, timezone

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

from app.config import settings

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

ALGORITHM = "HS256"


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


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


def create_access_token(user_id: uuid.UUID, role: str) -> str:
    now = datetime.now(timezone.utc)
    expire = now + timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    payload = {
        "sub": str(user_id),
        "role": role,
        "exp": expire,
        "iat": now,
        "jti": str(uuid.uuid4()),
    }
    return jwt.encode(payload, settings.SECRET_KEY, algorithm=ALGORITHM)


def decode_access_token(token: str) -> dict:
    try:
        return jwt.decode(token, settings.SECRET_KEY, algorithms=[ALGORITHM])
    except JWTError:
        return {}


def generate_refresh_token() -> str:
    return secrets.token_hex(64)


def hash_refresh_token(token: str) -> str:
    return hashlib.sha256(token.encode()).hexdigest()