mod add_remove;
mod assembly;
mod display;
mod engine;
mod outline;

use rustc_hash::FxHashSet;
use sycamore::prelude::*;

use add_remove::AddRemove;
use assembly::{Assembly, ElementKey};
use display::Display;
use outline::Outline;

#[derive(Clone)]
struct AppState {
    assembly: Assembly,
    selection: Signal<FxHashSet<ElementKey>>
}

impl AppState {
    fn new() -> AppState {
        AppState {
            assembly: Assembly::new(),
            selection: create_signal(FxHashSet::default())
        }
    }
    
    // in single-selection mode, select the element with the given key. in
    // multiple-selection mode, toggle whether the element with the given key
    // is selected
    fn select(&self, key: ElementKey, multi: bool) {
        if multi {
            self.selection.update(|sel| {
                if !sel.remove(&key) {
                    sel.insert(key);
                }
            });
        } else {
            self.selection.update(|sel| {
                sel.clear();
                sel.insert(key);
            });
        }
    }
}

fn main() {
    // set the console error panic hook
    #[cfg(feature = "console_error_panic_hook")]
    console_error_panic_hook::set_once();
    
    sycamore::render(|| {
        provide_context(AppState::new());
        
        view! {
            div(id="sidebar") {
                AddRemove {}
                Outline {}
            }
            Display {}
        }
    });
}