//! MIDI editor.
use crate::*;

/// Contains state for viewing and editing a clip
pub struct MidiEditor {
    /// Size of editor on screen
    pub size: Measure<TuiOut>,
    /// View mode and state of editor
    pub mode: PianoHorizontal,
    /// Input keymap
    pub keys: InputMap<'static, Self, MidiEditCommand, TuiIn, SourceIter<'static>>
}

impl std::fmt::Debug for MidiEditor {
    fn fmt (&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
        f.debug_struct("MidiEditor")
            .field("mode", &self.mode)
            .finish()
    }
}

impl Default for MidiEditor {
    fn default () -> Self {
        Self {
            size: Measure::new(),
            mode: PianoHorizontal::new(None),
            keys: InputMap::new(SourceIter(include_str!("../../../../config/keys_editor.edn"))),
        }
    }
}


has_size!(<TuiOut>|self: MidiEditor|&self.size);

content!(TuiOut: |self: MidiEditor| {
    self.autoscroll();
    //self.autozoom();
    self.size.of(&self.mode)
});

from!(|clip: &Arc<RwLock<MidiClip>>|MidiEditor = {
    let model = Self::from(Some(clip.clone()));
    model.redraw();
    model
});

from!(|clip: Option<Arc<RwLock<MidiClip>>>|MidiEditor = {
    let mut model = Self::default();
    *model.clip_mut() = clip;
    model.redraw();
    model
});

impl MidiEditor {

    /// Put note at current position
    pub fn put_note (&mut self, advance: bool) {
        let mut redraw = false;
        if let Some(clip) = self.clip() {
            let mut clip   = clip.write().unwrap();
            let note_start = self.time_pos();
            let note_pos   = self.note_pos();
            let note_len   = self.note_len();
            let note_end   = note_start + (note_len.saturating_sub(1));
            let key: u7    = u7::from(note_pos as u8);
            let vel: u7    = 100.into();
            let length     = clip.length;
            let note_end   = note_end % length;
            let note_on = MidiMessage::NoteOn { key, vel };
            if !clip.notes[note_start].iter().any(|msg|*msg == note_on) {
                clip.notes[note_start].push(note_on);
            }
            let note_off = MidiMessage::NoteOff { key, vel };
            if !clip.notes[note_end].iter().any(|msg|*msg == note_off) {
                clip.notes[note_end].push(note_off);
            }
            if advance {
                self.set_time_pos(note_end);
            }
            redraw = true;
        }
        if redraw {
            self.mode.redraw();
        }
    }

    pub fn clip_status (&self) -> impl Content<TuiOut> + '_ {
        let (color, name, length, looped) = if let Some(clip) = self.clip().as_ref().map(|p|p.read().unwrap()) {
            (clip.color, clip.name.clone(), clip.length, clip.looped)
        } else { (ItemTheme::G[64], String::new().into(), 0, false) };
        Bsp::e(
            FieldH(color, "Edit", format!("{name} ({length})")),
            FieldH(color, "Loop", looped.to_string())
        )
    }

    pub fn edit_status (&self) -> impl Content<TuiOut> + '_ {
        let (color, length) = if let Some(clip) = self.clip().as_ref().map(|p|p.read().unwrap()) {
            (clip.color, clip.length)
        } else { (ItemTheme::G[64], 0) };
        let time_pos  = self.time_pos();
        let time_zoom = self.time_zoom().get();
        let time_lock = if self.time_lock().get() { "[lock]" } else { "      " };
        let note_pos  = format!("{:>3}", self.note_pos());
        let note_name = format!("{:4}",  Note::pitch_to_name(self.note_pos()));
        let note_len  = format!("{:>4}", self.note_len());
        Bsp::e(
            FieldH(color, "Time", format!("{length}/{time_zoom}+{time_pos} {time_lock}")),
            FieldH(color, "Note", format!("{note_name} {note_pos} {note_len}")),
        )
    }

    //fn clip_length (&self) -> usize {
        //self.clip().as_ref().map(|p|p.read().unwrap().length).unwrap_or(1)
    //}
}

impl TimeRange for MidiEditor {
    fn time_len (&self) -> &AtomicUsize { self.mode.time_len() }
    fn time_zoom (&self) -> &AtomicUsize { self.mode.time_zoom() }
    fn time_lock (&self) -> &AtomicBool { self.mode.time_lock() }
    fn time_start (&self) -> &AtomicUsize { self.mode.time_start() }
    fn time_axis (&self) -> &AtomicUsize { self.mode.time_axis() }
}

impl NoteRange for MidiEditor {
    fn note_lo (&self) -> &AtomicUsize { self.mode.note_lo() }
    fn note_axis (&self) -> &AtomicUsize { self.mode.note_axis()  }
}

impl NotePoint for MidiEditor {
    fn note_len (&self) -> usize { self.mode.note_len() }
    fn set_note_len (&self, x: usize) -> usize { self.mode.set_note_len(x) }
    fn note_pos (&self) -> usize { self.mode.note_pos() }
    fn set_note_pos (&self, x: usize) -> usize { self.mode.set_note_pos(x) }
}

impl TimePoint for MidiEditor {
    fn time_pos (&self) -> usize { self.mode.time_pos() }
    fn set_time_pos (&self, x: usize) -> usize { self.mode.set_time_pos(x) }
}

impl MidiViewer for MidiEditor {
    fn buffer_size (&self, clip: &MidiClip) -> (usize, usize) { self.mode.buffer_size(clip) }
    fn redraw (&self) { self.mode.redraw() }
    fn clip (&self) -> &Option<Arc<RwLock<MidiClip>>> { self.mode.clip() }
    fn clip_mut (&mut self) -> &mut Option<Arc<RwLock<MidiClip>>> { self.mode.clip_mut() }
    fn set_clip (&mut self, p: Option<&Arc<RwLock<MidiClip>>>) { self.mode.set_clip(p) }
}