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

from fastapi import APIRouter, HTTPException, status

from app.api.deps import Database, CurrentUser
from app.config import get_settings
from app.schemas.auth import UserCreate, UserLogin, UserResponse, Token
from app.services.auth import AuthService

router = APIRouter()
settings = get_settings()


@router.post("/register", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
async def register(user_data: UserCreate, db: Database):
    """Register a new user."""
    # Check if user exists
    existing_user = await AuthService.get_user_by_email(db, user_data.email)
    if existing_user:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Email already registered",
        )
    
    # Create user
    user = await AuthService.create_user(
        db=db,
        email=user_data.email,
        password=user_data.password,
        name=user_data.name,
    )
    
    return user


@router.post("/login", response_model=Token)
async def login(user_data: UserLogin, db: Database):
    """Authenticate user and return JWT token."""
    user = await AuthService.authenticate_user(db, user_data.email, user_data.password)
    
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect email or password",
            headers={"WWW-Authenticate": "Bearer"},
        )
    
    access_token_expires = timedelta(minutes=settings.access_token_expire_minutes)
    access_token = AuthService.create_access_token(
        data={"sub": str(user.id), "email": user.email},
        expires_delta=access_token_expires,
    )
    
    return Token(
        access_token=access_token,
        token_type="bearer",
        expires_in=settings.access_token_expire_minutes * 60,
    )


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


@router.put("/me", response_model=UserResponse)
async def update_current_user(
    current_user: CurrentUser,
    db: Database,
    name: str = None,
):
    """Update current user information."""
    if name is not None:
        current_user.name = name
    
    await db.commit()
    await db.refresh(current_user)
    
    return current_user