use crate::*

/// 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> Render for JackDevice<E> {
    type Engine = E;
    fn min_size(&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)?)
    }
}