//! Application entry point.
mod api;
mod auth;
mod components;
mod model;
mod notify;
mod pages;
mod pwa;
mod ws;

use sycamore::prelude::*;
use sycamore_router::{navigate, HistoryIntegration, Route, Router};
use wasm_bindgen_futures::spawn_local;

use pages::game::GamePage;
use pages::history::HistoryPage;
use pages::leaderboard::LeaderboardPage;
use pages::lobby::LobbyPage;
use pages::login::LoginPage;

#[derive(Route, Clone)]
enum AppRoutes {
    #[to("/")]
    Lobby,
    #[to("/login")]
    Login,
    #[to("/game/<id>")]
    Game { id: String },
    #[to("/history")]
    History,
    #[to("/leaderboard")]
    Leaderboard,
    #[not_found]
    NotFound,
}

/// After the OIDC callback lands the SPA back on the configured
/// post-login redirect, forward the user to the page they were on before
/// being sent to the login page (see [`auth`]) — but only once a session
/// exists, so a cancelled login never bounces into a stale page.
fn restore_page_after_login() {
    let Some(path) = auth::saved_return_to() else {
        return;
    };
    spawn_local(async move {
        match api::me().await {
            Ok(Some(_)) => {
                auth::clear_return_to();
                if auth::current_path() != path {
                    navigate(&path);
                }
            }
            // Not logged in: keep the target for the next successful
            // login (a reload of the login page must not lose it).
            Ok(None) => {}
            // The probe failed (offline?): keep the target, too.
            Err(_) => {}
        }
    });
}

fn main() {
    console_error_panic_hook::set_once();
    sycamore::render(|| {
        view! {
            Router(
                integration=HistoryIntegration::new(),
                view=|route: ReadSignal<AppRoutes>| {
                    view! {
                        div(class="app") {
                            (match route.get_clone() {
                                AppRoutes::Lobby => view! { LobbyPage() },
                                AppRoutes::Login => view! { LoginPage() },
                                AppRoutes::Game { id } => view! { GamePage(id=id) },
                                AppRoutes::History => view! { HistoryPage() },
                                AppRoutes::Leaderboard => view! { LeaderboardPage() },
                                AppRoutes::NotFound => view! {
                                    div(class="status-card") {
                                        div(class="card") {
                                            div(class="card-body p-4") {
                                                h1(class="h4 mb-3") { "Page not found" }
                                                a(class="btn btn-warning", href="/") {
                                                    "Back to lobby"
                                                }
                                            }
                                        }
                                    }
                                },
                            })
                        }
                    }
                }
            )
        }
    });
    pwa::register();
    restore_page_after_login();
}