use crate::*;

view!(TuiOut: |self: Tek| self.size.of(View(self, self.view)); {
    ":nil" =>
        Box::new("nil"),
    ":transport" =>
        self.view_transport().boxed(),
    ":arranger" =>
        ArrangerView::new(self).boxed(),
    ":editor" =>
        self.editor.as_ref()
            .map(|e|Bsp::s(Bsp::e(e.clip_status(), e.edit_status()), e))
            .boxed(),
    ":sample" =>
        ().boxed(),//self.view_sample(self.is_editing()).boxed(),
    ":sampler" =>
        ().boxed(),//self.view_sampler(self.is_editing(), &self.editor).boxed(),
    ":samples-grid" =>
        self.tracks[0].sampler(0).map(|s|s.view_grid()).boxed(),
    ":status" =>
        self.view_status().boxed(),
    ":pool" => self.pool.as_ref()
        .map(|pool|Fixed::x(self.w_sidebar(), PoolView(self.is_editing(), pool)))
        .boxed(),
});

expose!([self: Tek] {
    [bool] => {}
    [u16] => {
        ":h-ins"     => self.h_inputs(),
        ":h-outs"    => self.h_outputs(),
        ":h-sample"  => if self.is_editing() { 0 } else { 5 },
        ":w-samples" => if self.is_editing() { 4 } else { 11 },
        ":w-sidebar" => self.w_sidebar(),
        ":y-ins"     => (self.size.h() as u16).saturating_sub(self.h_inputs() + 1),
        ":y-outs"    => (self.size.h() as u16).saturating_sub(self.h_outputs() + 1),
        ":y-samples" => if self.is_editing() { 1 } else { 0 },
    }
    [usize] => {
        ":scene-last" => self.scenes.len(),
        ":track-last" => self.tracks.len(),
    }
    [isize] => {}
    [Option<usize>] => {
        ":scene" => self.selected.scene(),
        ":track" => self.selected.track(),
    }
    [Color] => {}
    [Arc<RwLock<MidiClip>>] => {}
    [Option<Arc<RwLock<MidiClip>>>] => {
        ":clip" => match self.selected {
            Selection::Clip(t, s) => self.scenes[s].clips[t].clone(),
            _ => None
        }
    }
    [Selection] => {
        ":scene-next" => match self.selected {
            Selection::Mix => Selection::Scene(0),
            Selection::Track(t) => Selection::Clip(t, 0),
            Selection::Scene(s) if s + 1 < self.scenes.len() => Selection::Scene(s + 1),
            Selection::Scene(s) => Selection::Mix,
            Selection::Clip(t, s) if s + 1 < self.scenes.len() => Selection::Clip(t, s + 1),
            Selection::Clip(t, s) => Selection::Track(t),
        },
        ":scene-prev" => match self.selected {
            Selection::Mix        => Selection::Mix,
            Selection::Track(t)   => Selection::Track(t),
            Selection::Scene(0)   => Selection::Mix,
            Selection::Scene(s)   => Selection::Scene(s - 1),
            Selection::Clip(t, 0) => Selection::Track(t),
            Selection::Clip(t, s) => Selection::Clip(t, s - 1),
        },
        ":track-next" => match self.selected {
            Selection::Mix => Selection::Track(0),
            Selection::Track(t) if t + 1 < self.tracks.len() => Selection::Track(t + 1),
            Selection::Track(t) => Selection::Mix,
            Selection::Scene(s) => Selection::Clip(0, s),
            Selection::Clip(t, s) if t + 1 < self.tracks.len() => Selection::Clip(t + 1, s),
            Selection::Clip(t, s) => Selection::Scene(s),
        },
        ":track-prev" => match self.selected {
            Selection::Mix        => Selection::Mix,
            Selection::Scene(s)   => Selection::Scene(s),
            Selection::Track(0)   => Selection::Mix,
            Selection::Track(t)   => Selection::Track(t - 1),
            Selection::Clip(0, s) => Selection::Scene(s),
            Selection::Clip(t, s) => Selection::Clip(t - 1, s),
        },
    }
});

defcom! { |self, app: Tek|

    TekCommand {

        Sampler(cmd: SamplerCommand) => {
            println!("\n\rtodo: {cmd:?}");
            None
        }

        Enqueue(clip: Option<Arc<RwLock<MidiClip>>>) => {
            println!("\n\rtodo: enqueue {clip:?}");
            None
        }

        History(delta: isize) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        Zoom(zoom: Option<usize>) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        Scene(cmd: SceneCommand) =>
            cmd.delegate(app, Self::Scene)?

        Track(cmd: TrackCommand) =>
            cmd.delegate(app, Self::Track)?

        Output(cmd: OutputCommand) =>
            cmd.delegate(app, Self::Output)?

        Input(cmd: InputCommand) =>
            cmd.delegate(app, Self::Input)?

        Clip(cmd: ClipCommand) =>
            cmd.delegate(app, Self::Clip)?

        Clock(cmd: ClockCommand) =>
            cmd.delegate(app, Self::Clock)?

        Editor(cmd: MidiEditCommand) => app.editor.as_mut()
            .map(|editor|cmd.delegate(editor, Self::Editor))
            .transpose()?
            .flatten()

        Pool(cmd: PoolCommand) => if let Some(pool) = app.pool.as_mut() {
            let undo = cmd.clone().delegate(pool, Self::Pool)?;
            if let Some(editor) = app.editor.as_mut() {
                match cmd {
                    // autoselect: automatically load selected clip in editor
                    // autocolor:  update color in all places simultaneously
                    PoolCommand::Select(_) | PoolCommand::Clip(PoolClipCommand::SetColor(_, _)) =>
                        editor.set_clip(pool.clip().as_ref()),
                    _ => {}
                }
            };
            undo
        } else {
            None
        }

        Color(palette: ItemPalette) => {
            use Selection::*;
            Some(Self::Color(match app.selected {
                Mix => {
                    let old = app.color;
                    app.color = palette;
                    old
                },
                Track(t) => {
                    let old = app.tracks[t].color;
                    app.tracks[t].color = palette;
                    old
                }
                Scene(s) => {
                    let old = app.scenes[s].color;
                    app.scenes[s].color = palette;
                    old
                }
                Clip(t, s) => {
                    if let Some(ref clip) = app.scenes[s].clips[t] {
                        let mut clip = clip.write().unwrap();
                        let old = clip.color;
                        clip.color = palette;
                        old
                    } else {
                        return Ok(None)
                    }
                }
            }))
        }

        Edit(value: Option<bool>) => {
            if let Some(value) = value {
                if app.is_editing() != value {
                    app.editing.store(value, Relaxed);
                }
            } else {
                app.editing.store(!app.is_editing(), Relaxed);
            };
            // autocreate: create new clip from pool when entering empty cell
            if let Some(ref pool) = app.pool
                && app.is_editing()
                && let Selection::Clip(t, s) = app.selected
                && let Some(scene) = app.scenes.get_mut(s)
                && let Some(slot) = scene.clips.get_mut(t)
                && slot.is_none()
            {
                let (index, mut clip) = pool.add_new_clip();
                // autocolor: new clip colors from scene and track color
                clip.write().unwrap().color = ItemColor::random_near(
                    app.tracks[t].color.base.mix(
                        scene.color.base,
                        0.5
                    ),
                    0.2
                ).into();
                if let Some(ref mut editor) = app.editor {
                    editor.set_clip(Some(&clip));
                }
                *slot = Some(clip);
            }
            None
        }

        Launch => {
            use Selection::*;
            match app.selected {
                Track(t) => app.tracks[t].player.enqueue_next(None),
                Clip(t, s) => app.tracks[t].player.enqueue_next(app.scenes[s].clips[t].as_ref()),
                Scene(s) => {
                    for t in 0..app.tracks.len() {
                        app.tracks[t].player.enqueue_next(app.scenes[s].clips[t].as_ref())
                    }
                },
                _ => {}
            };
            None
        }

        Select(s: Selection) => {
            app.selected = s;
            // autoedit: load focused clip in editor.
            if let Some(ref mut editor) = app.editor {
                editor.set_clip(match app.selected {
                    Selection::Clip(t, s) if let Some(Some(Some(clip))) = app
                        .scenes.get(s).map(|s|s.clips.get(t)) => Some(clip),
                    _ => None
                });
            }
            None
        }

        StopAll => {
            for track in 0..app.tracks.len(){app.tracks[track].player.enqueue_next(None);}
            None
        }

    }

    InputCommand {

        Add => {
            app.midi_ins.push(JackMidiIn::new(&app.jack, &format!("M/{}", app.midi_ins.len()), &[])?);
            None
        }

    }

    OutputCommand {

        Add => {
            app.midi_outs.push(JackMidiOut::new(&app.jack, &format!("{}/M", app.midi_outs.len()), &[])?);
            None
        }

    }

    TrackCommand {

        Swap(a: usize, b: usize) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        SetSize(t: usize) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        SetZoom(z: usize) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        Add => {
            use Selection::*;
            let index = app.track_add(None, None, &[], &[])?.0;
            app.selected = match app.selected {
                Track(t)   => Track(index),
                Clip(t, s) => Clip(index, s),
                _ => app.selected
            };
            Some(Self::Del(index))
        }

        Del(index: usize) => {
            app.track_del(index);
            None
        }

        Stop(index: usize) => {
            app.tracks[index].player.enqueue_next(None);
            None
        }

        SetColor(index: usize, color: ItemPalette) => {
            let old = app.tracks[index].color;
            app.tracks[index].color = color;
            Some(Self::SetColor(index, old))
        }

        TogglePlay => {
            Some(Self::TogglePlay)
        }

        ToggleSolo => {
            Some(Self::ToggleSolo)
        }

        ToggleRecord => {
            if let Some(t) = app.selected.track() {
                app.tracks[t-1].player.recording = !app.tracks[t-1].player.recording;
            }
            Some(Self::ToggleRecord)
        }

        ToggleMonitor => {
            if let Some(t) = app.selected.track() {
                app.tracks[t-1].player.monitoring = !app.tracks[t-1].player.monitoring;
            }
            Some(Self::ToggleMonitor)
        }

    }

    SceneCommand {

        Swap(a: usize, b: usize) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        SetSize(index: usize) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        SetZoom(zoom: usize) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        Add => {
            use Selection::*;
            let index = app.scene_add(None, None)?.0;
            app.selected = match app.selected {
                Scene(s)   => Scene(index),
                Clip(t, s) => Clip(t, index),
                _ => app.selected
            };
            Some(Self::Del(index))
        }

        Del(index: usize) => {
            app.scene_del(index);
            None
        }

        SetColor(index: usize, color: ItemPalette) => {
            let old = app.scenes[index].color;
            app.scenes[index].color = color;
            Some(Self::SetColor(index, old))
        }

        Enqueue(scene: usize) => {
            for track in 0..app.tracks.len() {
                app.tracks[track].player.enqueue_next(app.scenes[scene].clips[track].as_ref());
            }
            None
        }

    }

    ClipCommand {

        Get(a: usize, b: usize) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        Edit(clip: Option<Arc<RwLock<MidiClip>>>) => {
            println!("\n\rtodo: edit {clip:?}");
            None
        }

        SetLoop(track: usize, scene: usize, looped: bool) => {
            println!("\n\rtodo: {self:?}");
            None
        }

        Put(track: usize, scene: usize, clip: Option<Arc<RwLock<MidiClip>>>) => {
            let old = app.scenes[scene].clips[track].clone();
            app.scenes[scene].clips[track] = clip;
            Some(Self::Put(track, scene, old))
        }

        Enqueue(track: usize, scene: usize) => {
            app.tracks[track].player.enqueue_next(app.scenes[scene].clips[track].as_ref());
            None
        }

        SetColor(track: usize, scene: usize, color: ItemPalette) => {
            app.scenes[scene].clips[track].as_ref().map(|clip|{
                let mut clip = clip.write().unwrap();
                let old = clip.color.clone();
                clip.color = color.clone();
                panic!("{color:?} {old:?}");
                Self::SetColor(track, scene, old)
            })
        }

    }
}

impose!([app: Tek] {

    TekCommand => {
        ("stop"    []
            Some(Self::StopAll))
        ("undo"    [d: usize]
            Some(Self::History(-(d.unwrap_or(0)as isize))))
        ("redo"    [d: usize]
            Some(Self::History(d.unwrap_or(0) as isize)))
        ("zoom"    [z: usize]
            Some(Self::Zoom(z)))
        ("edit"    []
            Some(Self::Edit(None)))
        ("edit"    [c: bool]
            Some(Self::Edit(c)))
        ("color"   []
            Some(Self::Color(ItemPalette::random())))
        ("color"   [c: Color]
            Some(Self::Color(c.map(ItemPalette::from).expect("no color"))))
        ("enqueue" [c: Arc<RwLock<MidiClip>>]
            Some(Self::Enqueue(c)))
        ("launch"  []
            Some(Self::Launch))
        ("clip"    [,..a]
            ClipCommand::try_from_expr(app, a).map(Self::Clip))
        ("clock"   [,..a]
            ClockCommand::try_from_expr(app.clock(), a).map(Self::Clock))
        ("editor"  [,..a]
            MidiEditCommand::try_from_expr(app.editor.as_ref().expect("no editor"), a).map(Self::Editor))
        ("pool"    [,..a]
            PoolCommand::try_from_expr(app.pool.as_ref().expect("no pool"), a).map(Self::Pool))
        //("sampler" [,..a]
        //  Self::Sampler( //SamplerCommand::try_from_expr(app.sampler().as_ref().expect("no sampler"), a).expect("invalid command")))
        ("scene"   [,..a]
            SceneCommand::try_from_expr(app, a).map(Self::Scene))
        ("track"   [,..a]
            TrackCommand::try_from_expr(app, a).map(Self::Track))
        ("input"   [,..a]
            InputCommand::try_from_expr(app, a).map(Self::Input))
        ("output"  [,..a]
            OutputCommand::try_from_expr(app, a).map(Self::Output))
        ("select"  [t: Selection]
            Some(t.map(Self::Select).expect("no selection")))
        ("select"  [t: usize, s: usize]
            Some(match (t.expect("no track"), s.expect("no scene")) {
                (0, 0) => Self::Select(Selection::Mix),
                (t, 0) => Self::Select(Selection::Track(t)),
                (0, s) => Self::Select(Selection::Scene(s)),
                (t, s) => Self::Select(Selection::Clip(t, s)),
            }))
    }

    ClipCommand => {
        ("get"     [a: usize, b: usize]
            Some(Self::Get(a.unwrap(), b.unwrap())))
        ("put"     [a: usize, b: usize, c: Option<Arc<RwLock<MidiClip>>>]
            Some(Self::Put(a.unwrap(), b.unwrap(), c.unwrap())))
        ("enqueue" [a: usize, b: usize]
            Some(Self::Enqueue(a.unwrap(), b.unwrap())))
        ("edit"    [a: Option<Arc<RwLock<MidiClip>>>]
            Some(Self::Edit(a.unwrap())))
        ("loop"    [a: usize, b: usize, c: bool]
            Some(Self::SetLoop(a.unwrap(), b.unwrap(), c.unwrap())))
        ("color"   [a: usize, b: usize]
            Some(Self::SetColor(a.unwrap(), b.unwrap(), ItemPalette::random())))
    }

    InputCommand => {
        ("add" [] Some(Self::Add))
    }

    OutputCommand => {
        ("add" [] Some(Self::Add))
    }

    SceneCommand => {
        ("add"     []
            Some(Self::Add))
        ("del"     [a: usize]
            Some(Self::Del(0)))
        ("zoom"    [a: usize]
            Some(Self::SetZoom(a.unwrap())))
        ("color"   [a: usize]
            Some(Self::SetColor(a.unwrap(), ItemPalette::G[128])))
        ("enqueue" [a: usize]
            Some(Self::Enqueue(a.unwrap())))
        ("swap"    [a: usize, b: usize]
            Some(Self::Swap(a.unwrap(), b.unwrap())))
    }

    TrackCommand => {
        ("add"   []
            Some(Self::Add))
        ("size"  [a: usize]
            Some(Self::SetSize(a.unwrap())))
        ("zoom"  [a: usize]
            Some(Self::SetZoom(a.unwrap())))
        ("color" [a: usize]
            Some(Self::SetColor(a.unwrap(), ItemPalette::random())))
        ("del"   [a: usize]
            Some(Self::Del(a.unwrap())))
        ("stop"  [a: usize]
            Some(Self::Stop(a.unwrap())))
        ("swap"  [a: usize, b: usize]
            Some(Self::Swap(a.unwrap(), b.unwrap())))
        ("play"  []
            Some(Self::TogglePlay))
        ("solo"  []
            Some(Self::ToggleSolo))
        ("rec"   []
            Some(Self::ToggleRecord))
        ("mon"   []
            Some(Self::ToggleMonitor))
    }

});

handle!(TuiIn: |self: Tek, input|Ok({
    // If editing, editor keys take priority
    if self.is_editing() {
        if self.editor.handle(input)? == Some(true) {
            return Ok(Some(true))
        }
    }
    // Handle from root keymap
    if let Some(command) = self.keys.command::<_, TekCommand, _>(self, input) {
        if let Some(undo) = command.execute(self)? { self.history.push(undo); }
        return Ok(Some(true))
    }
    // Handle from selection-dependent keymaps
    if let Some(command) = match self.selected() {
        Selection::Clip(_, _) => self.keys_clip,
        Selection::Track(_)   => self.keys_track,
        Selection::Scene(_)   => self.keys_scene,
        Selection::Mix        => self.keys_mix,
    }.command::<_, TekCommand, _>(self, input) {
        if let Some(undo) = command.execute(self)? { self.history.push(undo); }
        return Ok(Some(true))
    }
    None
}));