use cursive::{
    event::Key,
    menu::MenuTree,
    traits::*,
    views::{Dialog, EditView, Panel, ResizedView, TextView},
    Cursive,
};

fn main() {
    cursive::logger::init();

    let mut siv = cursive::default();

    siv.add_global_callback('q', cursive::Cursive::quit);
    siv.add_global_callback('~', cursive::Cursive::toggle_debug_console);
    siv.add_global_callback('o', open_prompt);
    siv.add_global_callback('?', help);

    siv.menubar()
        .add_subtree(
            "majc",
            MenuTree::new()
                .leaf("About", move |s| {
                    s.add_layer(Dialog::info(format!(
                        "{} {}",
                        env!("CARGO_PKG_NAME"),
                        env!("CARGO_PKG_VERSION")
                    )));
                })
                .leaf("Help", move |s| {
                    help(s);
                }),
        )
        .add_leaf("Open", |s| open_prompt(s));

    siv.add_global_callback(Key::Esc, |s| s.select_menubar());

    help(&mut siv);

    siv.run();
}

fn help(siv: &mut Cursive) {
    let content = include_str!("./help.gmi");

    siv.add_layer(
        Dialog::around(Panel::new(TextView::new(content).scrollable()))
            .title("Help")
            .dismiss_button("Ok"),
    );
}

fn open_prompt(siv: &mut Cursive) {
    siv.add_layer(
        Dialog::around(
            EditView::new()
                .on_submit(open)
                .with_name("url")
                .fixed_width(50),
        )
        .title("Enter a Gemini URL")
        .button("Ok", |s| {
            let url = s
                .call_on_name("url", |view: &mut EditView| view.get_content())
                .unwrap();
            open(s, &url);
        })
        .button("Cancel", |s| {
            s.pop_layer();
        }),
    );
}

fn open(siv: &mut Cursive, url: &str) {
    use maj::{get, StatusCode};
    use std::str;

    siv.pop_layer();
    log::debug!("got URL: {}", url);

    match get(url.to_string()) {
        Ok(resp) => {
            if resp.status != StatusCode::Success {
                siv.add_layer(Dialog::info(format!("{:?}: {}", resp.status, resp.meta)));
                return;
            }

            siv.add_fullscreen_layer(ResizedView::with_full_screen(
                Dialog::around(Panel::new(
                    TextView::new(str::from_utf8(&resp.body).unwrap()).scrollable(),
                ))
                .title(format!("{}: {}", url, resp.meta)),
            ));
        }
        Err(why) => {
            log::error!("got response error: {:?}", why);
            siv.add_layer(Dialog::info(format!("Error fetching response: {:?}", why)));
        }
    }
}