from typing import Optional

from rio import Column, Component, event, TextStyle, Text, ScrollContainer, Row, Button, Spacer, IconButton

from src.ez_lan_manager import ConfigurationService, CateringService, AccountingService
from src.ez_lan_manager.components.CateringCartItem import CateringCartItem
from src.ez_lan_manager.components.MainViewContentBox import MainViewContentBox
from src.ez_lan_manager.pages import BasePage
from src.ez_lan_manager.types.CateringMenuItem import CateringMenuItem
from src.ez_lan_manager.types.SessionStorage import SessionStorage


class CateringPage(Component):
    def __post_init__(self) -> None:
        self.session[SessionStorage].subscribe_to_logged_in_or_out_event(self.__class__.__name__, self.on_user_logged_in_status_changed)

    @event.on_populate
    async def on_populate(self) -> None:
        await self.session.set_title(f"{self.session[ConfigurationService].get_lan_info().name} - Catering")

    async def on_user_logged_in_status_changed(self) -> None:
        await self.force_refresh()

    async def on_remove_item(self, list_id: int) -> None:
        catering_service = self.session[CateringService]
        user_id = self.session[SessionStorage].user_id
        cart = catering_service.get_cart(user_id)
        try:
            cart.pop(list_id)
        except IndexError:
            return
        catering_service.save_cart(user_id, cart)
        await self.force_refresh()

    async def on_empty_cart_pressed(self) -> None:
        self.session[CateringService].save_cart(self.session[SessionStorage].user_id, [])
        await self.force_refresh()

    def build(self) -> Component:
        user_id = self.session[SessionStorage].user_id
        catering_service = self.session[CateringService]
        cart = catering_service.get_cart(user_id)
        cart_container = ScrollContainer(
            content=Column(
                *[CateringCartItem(
                    article_name=cart_item.name,
                    article_price=cart_item.price,
                    article_id=cart_item.item_id,
                    remove_item_cb=self.on_remove_item,
                    list_id=idx
                ) for idx, cart_item in enumerate(cart)],
                Spacer(grow_y=True)
            ),
            min_height=8,
            min_width=33,
            margin=1
        )
        shopping_cart = MainViewContentBox(
                    Column(
                        Text(
                            text="Catering",
                            style=TextStyle(
                                fill=self.session.theme.background_color,
                                font_size=1.2
                            ),
                            margin_top=2,
                            margin_bottom=0,
                            align_x=0.5
                        ),
                        Text(
                            text="Warenkorb",
                            style=TextStyle(
                                fill=self.session.theme.background_color,
                                font_size=0.8
                            ),
                            margin_top=0.2,
                            margin_bottom=0,
                            align_x=0.5
                        ),
                        cart_container,
                        Row(
                            Text(
                                text=f"Preis: {AccountingService.make_euro_string_from_int(sum(cart_item.price for cart_item in cart))}",
                                style=TextStyle(
                                    fill=self.session.theme.background_color,
                                    font_size=0.8
                                ),
                                margin=1
                            ),
                            Button(
                                content=Text(
                                    "Warenkorb leeren",
                                    style=TextStyle(fill=self.session.theme.danger_color, font_size=0.9),
                                    align_x=0.2
                                ),
                                margin=1,
                                margin_left=0,
                                shape="rectangle",
                                style="major",
                                color="primary",
                                on_press=self.on_empty_cart_pressed
                            ),
                            Button(
                                content=Text(
                                    "Bestellen",
                                    style=TextStyle(fill=self.session.theme.success_color, font_size=0.9),
                                    align_x=0.2
                                ),
                                margin=1,
                                margin_left=0,
                                shape="rectangle",
                                style="major",
                                color="primary"
                            ),
                        )
                    )
                ) if user_id else Spacer()



        return BasePage(
            content=Column(
                # SHOPPING CART
                shopping_cart,
                # ITEM SELECTION
                MainViewContentBox(

                ),
                align_y=0
            )
        )