"""Authentication endpoints."""
from datetime import timedelta
from typing import Any
from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from sqlalchemy.orm import Session

from app.core.auth import (
    authenticate_user,
    create_access_token,
    get_current_user
)
from app.database import get_db
from app.core.config import settings
from app.models.user import User
from app.schemas.token import Token
from app.schemas.user import User as UserSchema

router = APIRouter()

@router.post("/login", response_model=Token)
def login(
    db: Session = Depends(get_db),
    form_data: OAuth2PasswordRequestForm = Depends()
) -> Any:
    """OAuth2 compatible token login, get an access token for future requests."""
    user = authenticate_user(db, form_data.username, form_data.password)
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect email or password",
            headers={"WWW-Authenticate": "Bearer"},
        )
    elif not user.is_active:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Inactive user"
        )
    
    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    access_token = create_access_token(
        data={"sub": user.email, "is_admin": user.is_admin},
        expires_delta=access_token_expires
    )
    
    return {
        "access_token": access_token,
        "token_type": "bearer"
    }

@router.get("/me", response_model=UserSchema)
def read_users_me(current_user: User = Depends(get_current_user)):
    """Get current user."""
    return current_user