pub(crate) use tek_core::*;
pub(crate) use tek_core::midly::{*, live::LiveEvent, num::u7};
pub(crate) use std::thread::JoinHandle;
pub(crate) use std::fmt::{Debug, Formatter, Error};
pub(crate) use tek_core::jack::{
    Client, ProcessScope, Control, CycleTimes,
    Port, MidiIn, MidiOut, AudioIn, AudioOut, Unowned,
    Transport, TransportState, MidiIter, RawMidi
};

submod! {
    api_clip
    api_clock
    api_color
    api_jack
    api_phrase
    api_player
    api_scene
    api_track

    //api_mixer
    //api_channel
    //api_plugin
    //api_plugin_kind
    //api_plugin_lv2
    //api_sampler
    //api_sampler_sample
    //api_sampler_voice
}

pub trait JackActivate: Sized {
    fn activate_with <T: Audio + 'static> (
        self,
        init: impl FnOnce(&Arc<RwLock<JackClient>>)->Usually<T>
    )
        -> Usually<Arc<RwLock<T>>>;
}

impl JackActivate for JackClient {
    fn activate_with <T: Audio + 'static> (
        self,
        init: impl FnOnce(&Arc<RwLock<JackClient>>)->Usually<T>
    )
        -> Usually<Arc<RwLock<T>>>
    {
        let client = Arc::new(RwLock::new(self));
        let target = Arc::new(RwLock::new(init(&client)?));
        let event  = Box::new(move|_|{/*TODO*/}) as Box<dyn Fn(JackEvent) + Send + Sync>;
        let events = Notifications(event);
        let frame  = Box::new({
            let target = target.clone();
            move|c: &_, s: &_|if let Ok(mut target) = target.write() {
                target.process(c, s)
            } else {
                Control::Quit
            }
        });
        let frames = tek_core::jack::contrib::ClosureProcessHandler::new(frame as BoxedAudioHandler);
        let mut buffer = Self::Activating;
        std::mem::swap(&mut*client.write().unwrap(), &mut buffer);
        *client.write().unwrap() = Self::Active(Client::from(buffer).activate_async(events, frames)?);
        Ok(target)
    }
}

/// Trait for things that have a JACK process callback.
pub trait Audio: Send + Sync {
    fn process(&mut self, _: &Client, _: &ProcessScope) -> Control {
        Control::Continue
    }
    fn callback(
        state: &Arc<RwLock<Self>>, client: &Client, scope: &ProcessScope
    ) -> Control where Self: Sized {
        if let Ok(mut state) = state.write() {
            state.process(client, scope)
        } else {
            Control::Quit
        }
    }
}

/// A UI component that may be associated with a JACK client by the `Jack` factory.
pub trait AudioComponent<E: Engine>: Component<E> + Audio {
    /// Perform type erasure for collecting heterogeneous devices.
    fn boxed(self) -> Box<dyn AudioComponent<E>>
    where
        Self: Sized + 'static,
    {
        Box::new(self)
    }
}

/// All things that implement the required traits can be treated as `AudioComponent`.
impl<E: Engine, W: Component<E> + Audio> AudioComponent<E> for W {}

/// Trait for things that may expose JACK ports.
pub trait Ports {
    fn audio_ins(&self) -> Usually<Vec<&Port<Unowned>>> {
        Ok(vec![])
    }
    fn audio_outs(&self) -> Usually<Vec<&Port<Unowned>>> {
        Ok(vec![])
    }
    fn midi_ins(&self) -> Usually<Vec<&Port<Unowned>>> {
        Ok(vec![])
    }
    fn midi_outs(&self) -> Usually<Vec<&Port<Unowned>>> {
        Ok(vec![])
    }
}

fn register_ports<T: tek_core::jack::PortSpec + Copy>(
    client: &Client,
    names: Vec<String>,
    spec: T,
) -> Usually<BTreeMap<String, Port<T>>> {
    names
        .into_iter()
        .try_fold(BTreeMap::new(), |mut ports, name| {
            let port = client.register_port(&name, spec)?;
            ports.insert(name, port);
            Ok(ports)
        })
}

fn query_ports(client: &Client, names: Vec<String>) -> BTreeMap<String, Port<Unowned>> {
    names.into_iter().fold(BTreeMap::new(), |mut ports, name| {
        let port = client.port_by_name(&name).unwrap();
        ports.insert(name, port);
        ports
    })
}

///// A [AudioComponent] bound to a JACK client and a set of ports.
//pub struct JackDevice<E: Engine> {
    ///// The active JACK client of this device.
    //pub client: DynamicAsyncClient,
    ///// The device state, encapsulated for sharing between threads.
    //pub state: Arc<RwLock<Box<dyn AudioComponent<E>>>>,
    ///// Unowned copies of the device's JACK ports, for connecting to the device.
    ///// The "real" readable/writable `Port`s are owned by the `state`.
    //pub ports: UnownedJackPorts,
//}

//impl<E: Engine> std::fmt::Debug for JackDevice<E> {
    //fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        //f.debug_struct("JackDevice")
            //.field("ports", &self.ports)
            //.finish()
    //}
//}

//impl<E: Engine> Widget for JackDevice<E> {
    //type Engine = E;
    //fn layout(&self, to: E::Size) -> Perhaps<E::Size> {
        //self.state.read().unwrap().layout(to)
    //}
    //fn render(&self, to: &mut E::Output) -> Usually<()> {
        //self.state.read().unwrap().render(to)
    //}
//}

//impl<E: Engine> Handle<E> for JackDevice<E> {
    //fn handle(&mut self, from: &E::Input) -> Perhaps<E::Handled> {
        //self.state.write().unwrap().handle(from)
    //}
//}

//impl<E: Engine> Ports for JackDevice<E> {
    //fn audio_ins(&self) -> Usually<Vec<&Port<Unowned>>> {
        //Ok(self.ports.audio_ins.values().collect())
    //}
    //fn audio_outs(&self) -> Usually<Vec<&Port<Unowned>>> {
        //Ok(self.ports.audio_outs.values().collect())
    //}
    //fn midi_ins(&self) -> Usually<Vec<&Port<Unowned>>> {
        //Ok(self.ports.midi_ins.values().collect())
    //}
    //fn midi_outs(&self) -> Usually<Vec<&Port<Unowned>>> {
        //Ok(self.ports.midi_outs.values().collect())
    //}
//}

//impl<E: Engine> JackDevice<E> {
    ///// Returns a locked mutex of the state's contents.
    //pub fn state(&self) -> LockResult<RwLockReadGuard<Box<dyn AudioComponent<E>>>> {
        //self.state.read()
    //}
    ///// Returns a locked mutex of the state's contents.
    //pub fn state_mut(&self) -> LockResult<RwLockWriteGuard<Box<dyn AudioComponent<E>>>> {
        //self.state.write()
    //}
    //pub fn connect_midi_in(&self, index: usize, port: &Port<Unowned>) -> Usually<()> {
        //Ok(self
            //.client
            //.as_client()
            //.connect_ports(port, self.midi_ins()?[index])?)
    //}
    //pub fn connect_midi_out(&self, index: usize, port: &Port<Unowned>) -> Usually<()> {
        //Ok(self
            //.client
            //.as_client()
            //.connect_ports(self.midi_outs()?[index], port)?)
    //}
    //pub fn connect_audio_in(&self, index: usize, port: &Port<Unowned>) -> Usually<()> {
        //Ok(self
            //.client
            //.as_client()
            //.connect_ports(port, self.audio_ins()?[index])?)
    //}
    //pub fn connect_audio_out(&self, index: usize, port: &Port<Unowned>) -> Usually<()> {
        //Ok(self
            //.client
            //.as_client()
            //.connect_ports(self.audio_outs()?[index], port)?)
    //}
//}

///// Collection of JACK ports as [AudioIn]/[AudioOut]/[MidiIn]/[MidiOut].
//#[derive(Default, Debug)]
//pub struct JackPorts {
    //pub audio_ins: BTreeMap<String, Port<AudioIn>>,
    //pub midi_ins: BTreeMap<String, Port<MidiIn>>,
    //pub audio_outs: BTreeMap<String, Port<AudioOut>>,
    //pub midi_outs: BTreeMap<String, Port<MidiOut>>,
//}

///// Collection of JACK ports as [Unowned].
//#[derive(Default, Debug)]
//pub struct UnownedJackPorts {
    //pub audio_ins: BTreeMap<String, Port<Unowned>>,
    //pub midi_ins: BTreeMap<String, Port<Unowned>>,
    //pub audio_outs: BTreeMap<String, Port<Unowned>>,
    //pub midi_outs: BTreeMap<String, Port<Unowned>>,
//}

//impl JackPorts {
    //pub fn clone_unowned(&self) -> UnownedJackPorts {
        //let mut unowned = UnownedJackPorts::default();
        //for (name, port) in self.midi_ins.iter() {
            //unowned.midi_ins.insert(name.clone(), port.clone_unowned());
        //}
        //for (name, port) in self.midi_outs.iter() {
            //unowned.midi_outs.insert(name.clone(), port.clone_unowned());
        //}
        //for (name, port) in self.audio_ins.iter() {
            //unowned.audio_ins.insert(name.clone(), port.clone_unowned());
        //}
        //for (name, port) in self.audio_outs.iter() {
            //unowned
                //.audio_outs
                //.insert(name.clone(), port.clone_unowned());
        //}
        //unowned
    //}
//}

///// Implement the `Ports` trait.
//#[macro_export]
//macro_rules! ports {
    //($T:ty $({ $(audio: {
        //$(ins:  |$ai_arg:ident|$ai_impl:expr,)?
        //$(outs: |$ao_arg:ident|$ao_impl:expr,)?
    //})? $(midi: {
        //$(ins:  |$mi_arg:ident|$mi_impl:expr,)?
        //$(outs: |$mo_arg:ident|$mo_impl:expr,)?
    //})?})?) => {
        //impl Ports for $T {$(
            //$(
                //$(fn audio_ins <'a> (&'a self) -> Usually<Vec<&'a Port<Unowned>>> {
                    //let cb = |$ai_arg:&'a Self|$ai_impl;
                    //cb(self)
                //})?
            //)?
            //$(
                //$(fn audio_outs <'a> (&'a self) -> Usually<Vec<&'a Port<Unowned>>> {
                    //let cb = (|$ao_arg:&'a Self|$ao_impl);
                    //cb(self)
                //})?
            //)?
        //)? $(
            //$(
                //$(fn midi_ins <'a> (&'a self) -> Usually<Vec<&'a Port<Unowned>>> {
                    //let cb = (|$mi_arg:&'a Self|$mi_impl);
                    //cb(self)
                //})?
            //)?
            //$(
                //$(fn midi_outs <'a> (&'a self) -> Usually<Vec<&'a Port<Unowned>>> {
                    //let cb = (|$mo_arg:&'a Self|$mo_impl);
                    //cb(self)
                //})?
            //)?
        //)?}
    //};
//}

///// `JackDevice` factory. Creates JACK `Client`s, performs port registration
///// and activation, and encapsulates a `AudioComponent` into a `JackDevice`.
//pub struct Jack {
    //pub client: Client,
    //pub midi_ins: Vec<String>,
    //pub audio_ins: Vec<String>,
    //pub midi_outs: Vec<String>,
    //pub audio_outs: Vec<String>,
//}

//impl Jack {
    //pub fn new(name: &str) -> Usually<Self> {
        //Ok(Self {
            //midi_ins: vec![],
            //audio_ins: vec![],
            //midi_outs: vec![],
            //audio_outs: vec![],
            //client: Client::new(name, ClientOptions::NO_START_SERVER)?.0,
        //})
    //}
    //pub fn run<'a: 'static, D, E>(
        //self,
        //state: impl FnOnce(JackPorts) -> Box<D>,
    //) -> Usually<JackDevice<E>>
    //where
        //D: AudioComponent<E> + Sized + 'static,
        //E: Engine + 'static,
    //{
        //let owned_ports = JackPorts {
            //audio_ins: register_ports(&self.client, self.audio_ins, AudioIn::default())?,
            //audio_outs: register_ports(&self.client, self.audio_outs, AudioOut::default())?,
            //midi_ins: register_ports(&self.client, self.midi_ins, MidiIn::default())?,
            //midi_outs: register_ports(&self.client, self.midi_outs, MidiOut::default())?,
        //};
        //let midi_outs = owned_ports
            //.midi_outs
            //.values()
            //.map(|p| Ok(p.name()?))
            //.collect::<Usually<Vec<_>>>()?;
        //let midi_ins = owned_ports
            //.midi_ins
            //.values()
            //.map(|p| Ok(p.name()?))
            //.collect::<Usually<Vec<_>>>()?;
        //let audio_outs = owned_ports
            //.audio_outs
            //.values()
            //.map(|p| Ok(p.name()?))
            //.collect::<Usually<Vec<_>>>()?;
        //let audio_ins = owned_ports
            //.audio_ins
            //.values()
            //.map(|p| Ok(p.name()?))
            //.collect::<Usually<Vec<_>>>()?;
        //let state = Arc::new(RwLock::new(state(owned_ports) as Box<dyn AudioComponent<E>>));
        //let client = self.client.activate_async(
            //Notifications(Box::new({
                //let _state = state.clone();
                //move |_event| {
                    //// FIXME: this deadlocks
                    ////state.lock().unwrap().handle(&event).unwrap();
                //}
            //}) as Box<dyn Fn(JackEvent) + Send + Sync>),
            //contrib::ClosureProcessHandler::new(Box::new({
                //let state = state.clone();
                //move |c: &Client, s: &ProcessScope| state.write().unwrap().process(c, s)
            //}) as BoxedAudioHandler),
        //)?;
        //Ok(JackDevice {
            //ports: UnownedJackPorts {
                //audio_ins: query_ports(&client.as_client(), audio_ins),
                //audio_outs: query_ports(&client.as_client(), audio_outs),
                //midi_ins: query_ports(&client.as_client(), midi_ins),
                //midi_outs: query_ports(&client.as_client(), midi_outs),
            //},
            //client,
            //state,
        //})
    //}
    //pub fn audio_in(mut self, name: &str) -> Self {
        //self.audio_ins.push(name.to_string());
        //self
    //}
    //pub fn audio_out(mut self, name: &str) -> Self {
        //self.audio_outs.push(name.to_string());
        //self
    //}
    //pub fn midi_in(mut self, name: &str) -> Self {
        //self.midi_ins.push(name.to_string());
        //self
    //}
    //pub fn midi_out(mut self, name: &str) -> Self {
        //self.midi_outs.push(name.to_string());
        //self
    //}
//}

//impl Command<ArrangerModel> for ArrangerSceneCommand {
//}
            //Edit(phrase)   => { state.state.phrase = phrase.clone() },
            //ToggleViewMode => { state.state.mode.to_next(); },
            //Delete         => { state.state.delete(); },
            //Activate       => { state.state.activate(); },
            //ZoomIn         => { state.state.zoom_in(); },
            //ZoomOut        => { state.state.zoom_out(); },
            //MoveBack       => { state.state.move_back(); },
            //MoveForward    => { state.state.move_forward(); },
            //RandomColor    => { state.state.randomize_color(); },
            //Put            => { state.state.phrase_put(); },
            //Get            => { state.state.phrase_get(); },
            //AddScene       => { state.state.scene_add(None, None)?; },
            //AddTrack       => { state.state.track_add(None, None)?; },
            //ToggleLoop     => { state.state.toggle_loop() },
    //pub fn zoom_in (&mut self) {
        //if let ArrangerEditorMode::Vertical(factor) = self.mode {
            //self.mode = ArrangerEditorMode::Vertical(factor + 1)
        //}
    //}
    //pub fn zoom_out (&mut self) {
        //if let ArrangerEditorMode::Vertical(factor) = self.mode {
            //self.mode = ArrangerEditorMode::Vertical(factor.saturating_sub(1))
        //}
    //}
    //pub fn move_back (&mut self) {
        //match self.selected {
            //ArrangerEditorFocus::Scene(s) => {
                //if s > 0 {
                    //self.scenes.swap(s, s - 1);
                    //self.selected = ArrangerEditorFocus::Scene(s - 1);
                //}
            //},
            //ArrangerEditorFocus::Track(t) => {
                //if t > 0 {
                    //self.tracks.swap(t, t - 1);
                    //self.selected = ArrangerEditorFocus::Track(t - 1);
                    //// FIXME: also swap clip order in scenes
                //}
            //},
            //_ => todo!("arrangement: move forward")
        //}
    //}
    //pub fn move_forward (&mut self) {
        //match self.selected {
            //ArrangerEditorFocus::Scene(s) => {
                //if s < self.scenes.len().saturating_sub(1) {
                    //self.scenes.swap(s, s + 1);
                    //self.selected = ArrangerEditorFocus::Scene(s + 1);
                //}
            //},
            //ArrangerEditorFocus::Track(t) => {
                //if t < self.tracks.len().saturating_sub(1) {
                    //self.tracks.swap(t, t + 1);
                    //self.selected = ArrangerEditorFocus::Track(t + 1);
                    //// FIXME: also swap clip order in scenes
                //}
            //},
            //_ => todo!("arrangement: move forward")
        //}
    //}

//impl From<Instant> for Clock {
    //fn from (current: Instant) -> Self {
        //Self {
            //playing: Some(TransportState::Stopped).into(),
            //started: None.into(),
            //quant:   24.into(),
            //sync:    (current.timebase.ppq.get() * 4.).into(),
            //current,
        //}
    //}
//}