use crate::*;

/// Stores and displays time-related info.
pub struct TransportTui {
    pub jack:   Arc<RwLock<JackClient>>,
    pub clock:  ClockModel,
    pub size:   Measure<Tui>,
    pub cursor: (usize, usize),
    pub focus:  FocusState<TransportFocus>,
}

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

/// Create app state from JACK handle.
impl TryFrom<&Arc<RwLock<JackClient>>> for TransportTui {
    type Error = Box<dyn std::error::Error>;
    fn try_from (jack: &Arc<RwLock<JackClient>>) -> Usually<Self> {
        Ok(Self {
            jack:   jack.clone(),
            clock:  ClockModel::from(jack),
            size:   Measure::new(),
            cursor: (0, 0),
            focus:  FocusState::Entered(TransportFocus::PlayPause)
        })
    }
}

impl HasClock for TransportTui {
    fn clock (&self) -> &ClockModel {
        &self.clock
    }
}

/// Which item of the transport toolbar is focused
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum TransportFocus {
    Bpm,
    Sync,
    PlayPause,
    Clock,
    Quant,
}

impl FocusWrap<TransportFocus> for TransportFocus {
    fn wrap <'a, W: Widget<Engine = Tui>> (self, focus: TransportFocus, content: &'a W)
        -> impl Widget<Engine = Tui> + 'a
    {
        let focused   = focus == self;
        let corners   = focused.then_some(CORNERS);
        let highlight = focused.then_some(Background(Color::Rgb(60, 70, 50)));
        lay!(corners, highlight, *content)
    }
}

impl FocusWrap<TransportFocus> for Option<TransportFocus> {
    fn wrap <'a, W: Widget<Engine = Tui>> (self, focus: TransportFocus, content: &'a W)
        -> impl Widget<Engine = Tui> + 'a
    {
        let focused   = Some(focus) == self;
        let corners   = focused.then_some(CORNERS);
        let highlight = focused.then_some(Background(Color::Rgb(60, 70, 50)));
        lay!(corners, highlight, *content)
    }
}

impl_focus!(TransportTui TransportFocus [
    //&[Menu],
    &[
        PlayPause,
        Bpm,
        Sync,
        Quant,
        Clock,
    ],
]);

#[derive(Copy, Clone)]
pub struct TransportStatusBar;

impl StatusBar for TransportStatusBar {
    type State = ();
    fn hotkey_fg () -> Color {
        TuiTheme::hotkey_fg()
    }
    fn update (&mut self, state: &()) {
        todo!()
    }
}

impl Content for TransportStatusBar {
    type Engine = Tui;
    fn content (&self) -> impl Widget<Engine = Tui> {
        todo!();
        ""
    }
}