from app import db
from typing import List
from .model import Widget
from .interface import WidgetInterface


class WidgetService():
    @staticmethod
    def get_all() -> List[Widget]:
        return Widget.query.all()

    @staticmethod
    def get_by_id(widget_id: int) -> Widget:
        return Widget.query.get(widget_id)

    @staticmethod
    def update(widget: Widget, Widget_change_updates: WidgetInterface) -> Widget:
        widget.update(Widget_change_updates)
        db.session.commit()
        return widget

    @staticmethod
    def delete_by_id(widget_id: int) -> List[int]:
        widget = Widget.query.filter(Widget.widget_id == widget_id).first()
        if not widget:
            return []
        db.session.delete(widget)
        db.session.commit()
        return [widget_id]

    @staticmethod
    def create(new_attrs: WidgetInterface) -> Widget:
        new_widget = Widget(
            name=new_attrs['name'],
            purpose=new_attrs['purpose']
        )

        db.session.add(new_widget)
        db.session.commit()

        return new_widget