use super::*;

#[derive(Default)]
pub struct JackPorts {
    lifesaver: Arc<()>,
    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>>,
}

#[derive(Default)]
pub struct UnownedJackPorts {
    pub audio_ins:  BTreeMap<String, Port<::jack::Unowned>>,
    pub midi_ins:   BTreeMap<String, Port<::jack::Unowned>>,
    pub audio_outs: BTreeMap<String, Port<::jack::Unowned>>,
    pub midi_outs:  BTreeMap<String, Port<::jack::Unowned>>,
}

impl JackPorts {
    pub fn clone_unowned (&self, client: &Client) -> UnownedJackPorts {
        let mut unowned = UnownedJackPorts::default();
        for (name, port) in self.midi_ins.iter() {
            unowned.midi_ins.insert(name.clone(), unsafe {
                Port::from_raw(::jack::Unowned, client.raw(), port.raw(), Arc::downgrade(&self.lifesaver))
            });
        }
        for (name, port) in self.midi_outs.iter() {
            unowned.midi_outs.insert(name.clone(), unsafe {
                Port::from_raw(::jack::Unowned, client.raw(), port.raw(), Arc::downgrade(&self.lifesaver))
            });
        }
        for (name, port) in self.audio_ins.iter() {
            unowned.audio_ins.insert(name.clone(), unsafe {
                Port::from_raw(::jack::Unowned, client.raw(), port.raw(), Arc::downgrade(&self.lifesaver))
            });
        }
        for (name, port) in self.audio_outs.iter() {
            unowned.audio_outs.insert(name.clone(), unsafe {
                Port::from_raw(::jack::Unowned, client.raw(), port.raw(), Arc::downgrade(&self.lifesaver))
            });
        }
        unowned
    }
}

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

#[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)
                })?
            )?
        )?}
    };
}