use gtk::glib;
use gtk::prelude::*;

const APP_ID: &str = "org.gtk_rs.HelloWorld1";

fn main() -> glib::ExitCode {
    // Create a new application
    let app = gtk::Application::builder().application_id(APP_ID).build();

    app.connect_activate(build_ui);

    // Run the application
    app.run()
}

pub struct App {
    pub window: gtk::Window,
    pub container: gtk::Paned,
    pub center: gtk::Button,
    pub toolbar: gtk::Button,
    pub header: Header,
}

impl App {
    fn new() -> App {
        let window = gtk::Window::new();
        let container = gtk::Paned::new(gtk::Orientation::Horizontal);
        let header = Header::new();
        let toolbar = gtk::Button::builder()
            .label("Press me!")
            .margin_top(12)
            .margin_bottom(12)
            .margin_start(12)
            .margin_end(12)
            .build();
        let center = gtk::Button::builder()
            .label("Press me!")
            .margin_top(12)
            .margin_bottom(12)
            .margin_start(12)
            .margin_end(12)
            .build();

        window.set_titlebar(Some(&header.container));
        window.set_title(Some("Thyme"));

        container.set_start_child(Some(&toolbar));
        container.set_end_child(Some(&center));
        window.set_child(Some(&container));

        App {
            window,
            center,
            container,
            toolbar,
            header,
        }
    }
}

pub struct Header {
    pub container: gtk::HeaderBar,
    pub open_btn: gtk::Button,
    pub save_btn: gtk::Button,
    pub save_as_btn: gtk::Button,
}

impl Header {
    fn new() -> Header {
        let container = gtk::HeaderBar::new();

        let open_btn = gtk::Button::with_label("open");
        let save_btn = gtk::Button::with_label("save");
        let save_as_btn = gtk::Button::with_label("save as");

        open_btn.connect_clicked(Header::do_open);

        container.pack_start(&open_btn);
        container.pack_end(&save_btn);
        container.pack_end(&save_as_btn);

        Header {
            container,
            open_btn,
            save_btn,
            save_as_btn,
        }
    }

    fn do_open(_: &gtk::Button) {
        let _open_dialog = gtk::FileChooserDialog::new(
            Some("Open"),
            Some(&gtk::Window::new()),
            gtk::FileChooserAction::Open,
            &[
                ("Cancel", gtk::ResponseType::Cancel),
                ("Open", gtk::ResponseType::Ok),
            ],
        );
    }
}

fn build_ui(app: &gtk::Application) {
    let thyme_app = App::new();
    thyme_app.window.set_application(Some(app));
    thyme_app.window.present();
}