use crate::*;
impl Handle<Tui> for Sampler {
    fn handle (&mut self, from: &Tui) -> Perhaps<bool> {
        handle_keymap(self, &from.event(), KEYMAP_SAMPLER)
    }
}
/// Key bindings for sampler device.
pub const KEYMAP_SAMPLER: &'static [KeyBinding<Sampler>] = keymap!(Sampler {
    [Up, NONE, "/sampler/cursor/up", "move cursor up", |state: &mut Sampler| {
        state.cursor.0 = if state.cursor.0 == 0 {
            state.mapped.len() + state.unmapped.len() - 1
        } else {
            state.cursor.0 - 1
        };
        Ok(true)
    }],
    [Down, NONE, "/sampler/cursor/down", "move cursor down", |state: &mut Sampler| {
        state.cursor.0 = (state.cursor.0 + 1) % (state.mapped.len() + state.unmapped.len());
        Ok(true)
    }],
    [Char('p'), NONE, "/sampler/play", "play current sample",  |state: &mut Sampler| {
        if let Some(sample) = state.sample() {
            state.voices.write().unwrap().push(Sample::play(sample, 0, &100.into()));
        }
        Ok(true)
    }],
    [Char('a'), NONE, "/sampler/add", "add a new sample", |state: &mut Sampler| {
        let sample = Arc::new(RwLock::new(Sample::new("", 0, 0, vec![])));
        *state.modal.lock().unwrap() = Some(Exit::boxed(AddSampleModal::new(&sample, &state.voices)?));
        state.unmapped.push(sample);
        Ok(true)
    }],
    [Char('r'), NONE, "/sampler/replace", "replace selected sample", |state: &mut Sampler| {
        if let Some(sample) = state.sample() {
            *state.modal.lock().unwrap() = Some(Exit::boxed(AddSampleModal::new(&sample, &state.voices)?));
        }
        Ok(true)
    }],
    [Enter, NONE, "/sampler/edit", "edit selected sample", |state: &mut Sampler| {
        if let Some(sample) = state.sample() {
            state.editing = Some(sample.clone());
        }
        Ok(true)
    }],
});