"""
Authentication API endpoints.
"""
from datetime import timedelta
from typing import Annotated

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session

from app.core.database import get_db
from app.core.security import (
    verify_password,
    get_password_hash,
    create_access_token,
)
from app.core.config import get_settings
from app.models.user import User
from app.schemas import Token, UserCreate, UserResponse, LoginRequest
from app.api.deps import CurrentUser

router = APIRouter(prefix="/api/auth", tags=["auth"])
settings = get_settings()


@router.post("/login", response_model=Token)
async def login(
    login_data: LoginRequest,
    db: Annotated[Session, Depends(get_db)],
):
    """Login and get access token. Expects SHA-256 hashed password."""
    user = db.query(User).filter(User.username == login_data.username).first()

    if not user or not verify_password(login_data.password, user.hashed_password):
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password",
            headers={"WWW-Authenticate": "Bearer"},
        )

    access_token = create_access_token(
        data={"sub": user.username},
        expires_delta=timedelta(minutes=settings.access_token_expire_minutes),
    )

    return Token(access_token=access_token)


@router.post("/register", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
async def register(
    user_data: UserCreate,
    db: Annotated[Session, Depends(get_db)],
):
    """Register a new user. Disabled for production."""
    raise HTTPException(
        status_code=status.HTTP_403_FORBIDDEN,
        detail="Registration is disabled",
    )


@router.get("/me", response_model=UserResponse)
async def get_current_user_info(current_user: CurrentUser):
    """Get current user information."""
    return current_user


@router.post("/logout")
async def logout():
    """Logout (client should discard token)."""
    return {"message": "Successfully logged out"}