use leptos::{
    IntoView, ev,
    html::{ElementChild, button},
    logging::log,
    prelude::{OnAttribute, Read, Show, ShowProps, ToChildren},
    server::LocalResource,
    task::spawn_local,
};
use wasm_bindgen_futures::JsFuture;
use web_sys::{
    HtmlAudioElement, MediaStream, MediaStreamConstraints, MediaStreamTrack, MediaTrackConstraints,
    wasm_bindgen::{JsCast, JsValue},
    window,
};

pub fn app() -> impl IntoView {
    let audio_stream = LocalResource::new(|| media());
    let props = ShowProps::builder()
        .when(move || audio_stream.read().is_some())
        .children(ToChildren::to_children(move || {
            let audio_element = HtmlAudioElement::new().unwrap();
            let audio_stream = audio_stream.read();
            let audio_stream = audio_stream.as_deref();
            audio_element.set_src_object(audio_stream);
            button()
                .on(ev::click, move |_| match audio_element.play() {
                    Ok(audio_element_play_promise) => {
                        log!("{}", "Play will");
                        spawn_local(async move {
                            JsFuture::from(audio_element_play_promise).await.ok();
                        });
                        log!("{}", "Play must");
                    }
                    Err(err_val) => log!("{:#?}", err_val),
                })
                .child("Happy Button")
                .into_view()
        }))
        .fallback(|| button().child("Sad Button"))
        .build();
    Show(props)
}

async fn media() -> MediaStream {
    let media_devices = window().unwrap().navigator().media_devices().unwrap();
    let media_stream_constraints = MediaStreamConstraints::new();
    let media_track_constraints = MediaTrackConstraints::new();

    media_stream_constraints.set_audio(&JsValue::TRUE);

    media_track_constraints.set_echo_cancellation(&JsValue::FALSE);
    media_track_constraints.set_noise_suppression(&JsValue::FALSE);
    media_track_constraints.set_auto_gain_control(&JsValue::FALSE);

    let media_stream_promise = media_devices
        .get_user_media_with_constraints(&media_stream_constraints)
        .unwrap();
    let media_stream = JsFuture::from(media_stream_promise)
        .await
        .unwrap()
        .dyn_into::<MediaStream>()
        .unwrap();
    let audio_stream_tracks = media_stream.get_audio_tracks();
    let audio_stream_tracks = audio_stream_tracks
        .iter()
        .map(|audio_track| audio_track.dyn_into::<MediaStreamTrack>().unwrap())
        .collect::<Vec<_>>();
    log!(
        "{:#?}\n audio_stream_track_count = {}",
        audio_stream_tracks,
        audio_stream_tracks.len()
    );
    let audio_stream_track = audio_stream_tracks.first().unwrap();
    let audio_stream_track_apply_constraints_promise = audio_stream_track
        .apply_constraints_with_constraints(&media_track_constraints)
        .unwrap();
    JsFuture::from(audio_stream_track_apply_constraints_promise)
        .await
        .unwrap();
    let audio_stream = MediaStream::new().unwrap();
    log!("{:#?}", audio_stream_track.get_constraints());
    audio_stream.add_track(audio_stream_track);
    audio_stream
}