use crate::*;
impl TransportToolbar<Tui> {
    fn handle_play_pause (&mut self, from: &TuiInput) -> Perhaps<bool> {
        match from.event() {
            key!(KeyCode::Enter) => self.toggle_play().map(|_|())?,
            _ => return Ok(None)
        }
        Ok(Some(true))
    }
    fn handle_bpm (&mut self, from: &TuiInput) -> Perhaps<bool> {
        match from.event() {
            key!(KeyCode::Char(',')) => { self.bpm -= 1.0;   },
            key!(KeyCode::Char('.')) => { self.bpm += 1.0;   },
            key!(KeyCode::Char('<')) => { self.bpm -= 0.001; },
            key!(KeyCode::Char('>')) => { self.bpm += 0.001; },
            _ => return Ok(None)
        }
        Ok(Some(true))
    }
    fn handle_quant (&mut self, from: &TuiInput) -> Perhaps<bool> {
        match from.event() {
            key!(KeyCode::Char(',')) => { self.quant = prev_note_length(self.quant); },
            key!(KeyCode::Char('.')) => { self.quant = next_note_length(self.quant); },
            _ => return Ok(None)
        }
        return Ok(Some(true))
    }
    fn handle_sync (&mut self, from: &TuiInput) -> Perhaps<bool> {
        match from.event() {
            key!(KeyCode::Char(',')) => { self.sync = prev_note_length(self.sync); },
            key!(KeyCode::Char('.')) => { self.sync = next_note_length(self.sync); },
            _ => return Ok(None)
        }
        return Ok(Some(true))
    }
}
impl Handle<Tui> for TransportToolbar<Tui> {
    fn handle (&mut self, from: &TuiInput) -> Perhaps<bool> {
        match from.event() {
            key!(KeyCode::Left)  => { self.focus.prev(); },
            key!(KeyCode::Right) => { self.focus.next(); },
            _ => match self.focus {
                TransportToolbarFocus::PlayPause => return self.handle_play_pause(from),
                TransportToolbarFocus::Bpm       => return self.handle_bpm(from),
                TransportToolbarFocus::Quant     => return self.handle_quant(from),
                TransportToolbarFocus::Sync      => return self.handle_sync(from),
                TransportToolbarFocus::Clock     => {/*todo*/},
            }
        }
        Ok(Some(true))
    }
}
impl Content for TransportToolbar<Tui> {
    type Engine = Tui;
    fn content (&self) -> impl Widget<Engine = Tui> {
        row!(
            self.focus.wrap(self.focused, TransportToolbarFocus::PlayPause, &Styled(
                match self.playing {
                    Some(TransportState::Stopped)  => Some(GRAY_DIM.bold()),
                    Some(TransportState::Starting) => Some(GRAY_NOT_DIM_BOLD),
                    Some(TransportState::Rolling)  => Some(WHITE_NOT_DIM_BOLD),
                    _ => unreachable!(),
                },
                match self.playing {
                    Some(TransportState::Rolling)  => "▶ PLAYING",
                    Some(TransportState::Starting) => "READY ...",
                    Some(TransportState::Stopped)  => "⏹ STOPPED",
                    _ => unreachable!(),
                }
            ).min_xy(11, 2).push_x(1)),
            self.focus.wrap(self.focused, TransportToolbarFocus::Bpm, &Outset::X(1u16, col! {
                "BPM",   format!("{}.{:03}", self.bpm as usize, (self.bpm * 1000.0) % 1000.0)
            })),
            self.focus.wrap(self.focused, TransportToolbarFocus::Quant, &Outset::X(1u16, col! {
                "QUANT", ppq_to_name(self.quant as usize)
            })),
            self.focus.wrap(self.focused, TransportToolbarFocus::Sync, &Outset::X(1u16, col! {
                "SYNC",  ppq_to_name(self.sync as usize)
            })),
            self.focus.wrap(self.focused, TransportToolbarFocus::Clock, &{
                let Self { frame: _frame, pulse, ppq, usecs, .. } = self;
                let (beats, pulses)    = if *ppq > 0 { (pulse / ppq, pulse % ppq) } else { (0, 0) };
                let (bars, beats)      = ((beats / 4) + 1, (beats % 4) + 1);
                let (seconds, msecs)   = (usecs / 1000000, usecs / 1000 % 1000);
                let (minutes, seconds) = (seconds / 60, seconds % 60);
                let time1 = format!("{bars}.{beats}.{pulses:02}");
                let time2 = format!("{minutes}:{seconds:02}:{msecs:03}");
                col!(time1.as_str(), time2.as_str()).outset_x(1)
            }),
        ).fill_x().bg(Color::Rgb(40, 50, 30))
    }
}
impl TransportToolbarFocus {
    pub fn wrap <'a, W: Widget<Engine = Tui>> (
        self, parent_focus: bool, focus: Self, widget: &'a W
    ) -> impl Widget<Engine = Tui> + 'a {
        let focused   = parent_focus && focus == self;
        let corners   = focused.then_some(CORNERS);
        let highlight = focused.then_some(Background(Color::Rgb(60, 70, 50)));
        lay!(corners, highlight, *widget)
    }
}