"""Безопасность: JWT, хеширование паролей."""

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

import jwt
from passlib.context import CryptContext
from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer

from app.config import settings

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/auth/login")


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


def verify_password(plain: str, hashed: str) -> bool:
    return pwd_context.verify(plain, hashed)


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 or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES))
    to_encode.update({"exp": expire})
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm="HS256")


def create_refresh_token(data: dict[str, Any]) -> str:
    expire = datetime.now(timezone.utc) + timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS)
    data_copy = data.copy()
    data_copy.update({"exp": expire, "type": "refresh"})
    return jwt.encode(data_copy, settings.SECRET_KEY, algorithm="HS256")


async def get_current_user(token: str = Depends(oauth2_scheme)) -> dict[str, Any]:
    """Извлечь текущего пользователя из токена."""
    try:
        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=["HS256"])
        user_id = payload.get("sub")
        role = payload.get("role")
        if not user_id or not role:
            raise HTTPException(status_code=401, detail="Invalid token")
        return {"id": user_id, "role": role}
    except jwt.PyJWTError:
        raise HTTPException(status_code=401, detail="Invalid or expired token")