from __future__ import annotations

from django.contrib.auth import get_user_model

from .models import UserNotification, UserProfile


def create_user_notification(*, user, title: str, body: str = '', level: str = UserNotification.LEVEL_INFO, link_url: str = '') -> UserNotification:
    return UserNotification.objects.create(
        user=user,
        title=(title or '').strip(),
        body=(body or '').strip(),
        level=level,
        link_url=(link_url or '').strip(),
    )


def notify_user(*, user, title: str, body: str = '', level: str = UserNotification.LEVEL_INFO, link_url: str = '', event_key: str = '') -> bool:
    if not user or not getattr(user, 'is_authenticated', False):
        return False
    profile, _ = UserProfile.objects.get_or_create(user=user)
    if event_key and not profile.notification_enabled(event_key):
        return False
    create_user_notification(user=user, title=title, body=body, level=level, link_url=link_url)
    return True


def notify_user_by_email(*, email: str, title: str, body: str = '', level: str = UserNotification.LEVEL_INFO, link_url: str = '', event_key: str = '') -> bool:
    normalized_email = (email or '').strip().lower()
    if not normalized_email:
        return False
    user = get_user_model().objects.filter(email__iexact=normalized_email).first()
    if not user:
        return False
    return notify_user(user=user, title=title, body=body, level=level, link_url=link_url, event_key=event_key)