use crate::*;
use tek_core::Direction;

impl<'a> Render<Tui> for Track<Tui> {
    fn render (&self, to: &mut TuiOutput<'a>) -> Perhaps<Rect> {
        TrackView {
            chain:     Some(&self),
            direction: tek_core::Direction::Right,
            focused:   true,
            entered:   true,
            //pub channels:          u8,
            //pub input_ports:       Vec<Port<AudioIn>>,
            //pub pre_gain_meter:    f64,
            //pub gain:              f64,
            //pub insert_ports:      Vec<Port<AudioOut>>,
            //pub return_ports:      Vec<Port<AudioIn>>,
            //pub post_gain_meter:   f64,
            //pub post_insert_meter: f64,
            //pub level:             f64,
            //pub pan:               f64,
            //pub output_ports:      Vec<Port<AudioOut>>,
            //pub post_fader_meter:  f64,
            //pub route:             String,
        }.render(to)
    }
}
pub struct TrackView<'a, T, U> {
    pub chain:     Option<&'a Track<T, U>>,
    pub direction: Direction,
    pub focused:   bool,
    pub entered:   bool,
}
impl<'a> Render<Tui> for TrackView<'a, Tui> {
    fn render (&self, to: &mut Tui) -> Perhaps<Rect> {
        let mut area = to.area();
        if let Some(chain) = self.chain {
            match self.direction {
                Direction::Down  => area.width = area.width.min(40),
                Direction::Right => area.width = area.width.min(10),
                _ => { unimplemented!() },
            }
            to.fill_bg(to.area(), Nord::bg_lo(self.focused, self.entered));
            let mut split = Split::new(self.direction);
            for device in chain.devices.as_slice().iter() {
                split = split.add_ref(device);
            }
            let (area, areas) = split.render_areas(to)?;
            if self.focused && self.entered && areas.len() > 0 {
                Corners(Style::default().green().not_dim()).draw(to.buffer, areas[0])?;
            }
            Ok(Some(area))
        } else {
            let Rect { x, y, width, height } = area;
            let label = "No chain selected";
            let x = x + (width - label.len() as u16) / 2;
            let y = y + height / 2;
            label.blit(to.buffer(), x, y, Some(Style::default().dim().bold()))?;
            Ok(Some(area))
        }
    }
}