// SPDX-License-Identifier: EUPL-1.2+
// SPDX-FileCopyrightText: 2025 Johannes Süllner <johannes.suellner@mailbox.org>

use iced::{Subscription, Task};

mod completion;
mod confirmation;
mod disk_selection;
mod installation;
mod layout;
mod welcome;

pub const WINDOW_WIDTH: f32 = 750.0;
pub const WINDOW_HEIGHT: f32 = 650.0;

pub const MARGIN_VERTICAL: f32 = 25.0;
pub const MARGIN_LR: f32 = 15.0;
pub const BUTTON_TEXT_SIZE: u16 = 20;
pub const TITLE_TEXT_SIZE: u16 = 24;

type UpdateResult = (Option<Box<dyn Page>>, Task<Event>);

type InstallResult = Result<String, (u32, String)>;

pub trait Page {
    fn update(&mut self, event: Event) -> UpdateResult;
    fn view(&self) -> iced::Element<'_, Event>;
    fn subscription(&self) -> Subscription<Event> {
        Subscription::none()
    }
}

#[derive(Clone, Debug)]
pub enum Event {
    /* Pages are ordered as they appear during the installation. */
    PageWelcome(welcome::PageWelcomeEvent),
    PageDiskSelection(disk_selection::PageDiskSelectionEvent),
    PageConfirmation(confirmation::PageConfirmationEvent),
    PageInstallation(installation::PageInstallationEvent),
    PageCompletion(completion::PageCompletionEvent),
}

pub const INITAL_PAGE: welcome::PageWelcome = welcome::PageWelcome {};