from datetime import datetime, timedelta
from typing import Optional
from jose import JWTError, jwt
import bcrypt
from app.config import settings


def verify_password(plain: str, hashed: str) -> bool:
    try:
        password_bytes = plain.encode("utf-8")
        if isinstance(hashed, str):
            hashed = hashed.encode("utf-8")
        return bcrypt.checkpw(password_bytes, hashed)
    except Exception:
        return False


def hash_password(password: str) -> str:
    password_bytes = password[:72].encode("utf-8")
    salt = bcrypt.gensalt()
    return bcrypt.hashpw(password_bytes, salt).decode("utf-8")


def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
    to_encode = data.copy()
    expire = datetime.utcnow() + (
        expires_delta or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    )
    to_encode.update({"exp": expire, "type": "access"})
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.JWT_ALGORITHM)


def create_refresh_token(data: dict) -> str:
    to_encode = data.copy()
    expire = datetime.utcnow() + timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS)
    to_encode.update({"exp": expire, "type": "refresh"})
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.JWT_ALGORITHM)


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