#![feature(trait_alias)]

pub(crate) use ::{
    tek_engine::*,
    tek_engine::tengri::{
        Usually, Perhaps, Has, MaybeHas, has, maybe_has, from,
        input::*,
        output::*,
        tui::*,
        tui::ratatui,
        tui::ratatui::widgets::{Widget, canvas::{Canvas, Line}}, 
        tui::ratatui::prelude::{Rect, Style, Stylize, Buffer, Color::{self, *}},
    },
    std::{
        cmp::Ord,
        ffi::OsString,
        fmt::{Debug, Formatter},
        fs::File,
        path::PathBuf,
        sync::{Arc, RwLock, atomic::{AtomicBool, AtomicUsize, Ordering::Relaxed}},
    }
};

#[cfg(feature = "sampler")] pub(crate) use symphonia::{
    core::{
        formats::Packet,
        codecs::{Decoder, CODEC_TYPE_NULL},
        //errors::Error as SymphoniaError,
        io::MediaSourceStream,
        probe::Hint,
        audio::SampleBuffer,
    },
    default::get_codecs,
};

#[cfg(feature = "lv2")] use std::thread::{spawn, JoinHandle};

#[cfg(feature = "lv2_gui")] use ::winit::{
    application::ApplicationHandler,
    event::WindowEvent,
    event_loop::{ActiveEventLoop, ControlFlow, EventLoop},
    window::{Window, WindowId},
    platform::x11::EventLoopBuilderExtX11
};

/// Define a type alias for iterators of sized items (columns).
macro_rules! def_sizes_iter {
    ($Type:ident => $($Item:ty),+) => {
        pub trait $Type<'a> =
            Iterator<Item=(usize, $(&'a $Item,)+ usize, usize)> + Send + Sync + 'a;
    }
}

#[cfg(feature = "arranger")]  mod arranger;  #[cfg(feature = "arranger")]  pub use self::arranger::*;
#[cfg(feature = "browse")]    mod browse;    #[cfg(feature = "browse")]    pub use self::browse::*;
#[cfg(feature = "clap")]      mod clap;      #[cfg(feature = "clap")]      pub use self::clap::*;
#[cfg(feature = "clip")]      mod clip;      #[cfg(feature = "clip")]      pub use self::clip::*;
#[cfg(feature = "clock")]     mod clock;     #[cfg(feature = "clock")]     pub use self::clock::*;
#[cfg(feature = "editor")]    mod editor;    #[cfg(feature = "editor")]    pub use self::editor::*;
#[cfg(feature = "lv2")]       mod lv2;       #[cfg(feature = "lv2")]       pub use self::lv2::*;
#[cfg(feature = "meter")]     mod meter;     #[cfg(feature = "meter")]     pub use self::meter::*;
#[cfg(feature = "mixer")]     mod mixer;     #[cfg(feature = "mixer")]     pub use self::mixer::*;
#[cfg(feature = "pool")]      mod pool;      #[cfg(feature = "pool")]      pub use self::pool::*;
#[cfg(feature = "port")]      mod port;      #[cfg(feature = "port")]      pub use self::port::*;
#[cfg(feature = "sampler")]   mod sampler;   #[cfg(feature = "sampler")]   pub use self::sampler::*;
#[cfg(feature = "scene")]     mod scene;     #[cfg(feature = "scene")]     pub use self::scene::*;
#[cfg(feature = "select")]    mod select;    #[cfg(feature = "select")]    pub use self::select::*;
#[cfg(feature = "sequencer")] mod sequencer; #[cfg(feature = "sequencer")] pub use self::sequencer::*;
#[cfg(feature = "sf2")]       mod sf2;       #[cfg(feature = "sf2")]       pub use self::sf2::*;
#[cfg(feature = "track")]     mod track;     #[cfg(feature = "track")]     pub use self::track::*;
#[cfg(feature = "vst2")]      mod vst2;      #[cfg(feature = "vst2")]      pub use self::vst2::*;
#[cfg(feature = "vst3")]      mod vst3;      #[cfg(feature = "vst3")]      pub use self::vst3::*;

pub fn swap_value <T: Clone + PartialEq, U> (
    target: &mut T, value: &T, returned: impl Fn(T)->U
) -> Perhaps<U> {
    if *target == *value {
        Ok(None)
    } else {
        let mut value = value.clone();
        std::mem::swap(target, &mut value);
        Ok(Some(returned(value)))
    }
}

pub fn toggle_bool <U> (
    target: &mut bool, value: &Option<bool>, returned: impl Fn(Option<bool>)->U
) -> Perhaps<U> {
    let mut value = value.unwrap_or(!*target);
    if value == *target {
        Ok(None)
    } else {
        std::mem::swap(target, &mut value);
        Ok(Some(returned(Some(value))))
    }
}

pub fn device_kinds () -> &'static [&'static str] {
    &[
        #[cfg(feature = "sampler")] "Sampler",
        #[cfg(feature = "lv2")] "Plugin (LV2)",
    ]
}

impl<T: Has<Vec<Device>>> HasDevices for T {
    fn devices (&self) -> &Vec<Device> {
        self.get()
    }
    fn devices_mut (&mut self) -> &mut Vec<Device> {
        self.get_mut()
    }
}

pub trait HasDevices {
    fn devices (&self) -> &Vec<Device>;
    fn devices_mut (&mut self) -> &mut Vec<Device>;
}

#[derive(Debug)]
pub enum Device {
    #[cfg(feature = "sampler")]
    Sampler(Sampler),
    #[cfg(feature = "lv2")]  // TODO
    Lv2(Lv2),
    #[cfg(feature = "vst2")] // TODO
    Vst2,
    #[cfg(feature = "vst3")] // TODO
    Vst3,
    #[cfg(feature = "clap")] // TODO
    Clap,
    #[cfg(feature = "sf2")]  // TODO
    Sf2,       
}

impl Device {
    pub fn name (&self) -> &str {
        match self {
            Self::Sampler(sampler) => sampler.name.as_ref(),
            _ => todo!(),
        }
    }
    pub fn midi_ins (&self) -> &[MidiInput] {
        match self {
            //Self::Sampler(Sampler { midi_in, .. }) => &[midi_in],
            _ => todo!()
        }
    }
    pub fn midi_outs (&self) -> &[MidiOutput] {
        match self {
            Self::Sampler(_) => &[],
            _ => todo!()
        }
    }
    pub fn audio_ins (&self) -> &[AudioInput] {
        match self {
            Self::Sampler(Sampler { audio_ins, .. }) => audio_ins.as_slice(),
            _ => todo!()
        }
    }
    pub fn audio_outs (&self) -> &[AudioOutput] {
        match self {
            Self::Sampler(Sampler { audio_outs, .. }) => audio_outs.as_slice(),
            _ => todo!()
        }
    }
}

pub struct DeviceAudio<'a>(pub &'a mut Device);

audio!(|self: DeviceAudio<'a>, client, scope|{
    use Device::*;
    match self.0 {
        #[cfg(feature = "sampler")] Sampler(sampler) => sampler.process(client, scope),
        #[cfg(feature = "lv2")]     Lv2(lv2)         => lv2.process(client, scope),
        #[cfg(feature = "vst2")]    Vst2 => { todo!() }, // TODO
        #[cfg(feature = "vst3")]    Vst3 => { todo!() }, // TODO
        #[cfg(feature = "clap")]    Clap => { todo!() }, // TODO
        #[cfg(feature = "sf2")]     Sf2  => { todo!() }, // TODO
    }
});

def_command!(DeviceCommand: |device: Device| {});
//take!(DeviceCommand|state: Arrangement, iter|state.selected_device().as_ref()
    //.map(|t|Take::take(t, iter)).transpose().map(|x|x.flatten()));