use crate::*;

impl Widget for Sampler<Tui> {
    type Engine = Tui;
    fn layout (&self, to: [u16;2]) -> Perhaps<[u16;2]> {
        todo!()
    }
    fn render (&self, to: &mut TuiOutput) -> Usually<()> {
        tui_render_sampler(self, to)
    }
}

pub fn tui_render_sampler (sampler: &Sampler<Tui>, to: &mut TuiOutput) -> Usually<()> {
    let [x, y, _, height] = to.area();
    let style = Style::default().gray();
    let title = format!(" {} ({})", sampler.name, sampler.voices.read().unwrap().len());
    to.blit(&title, x+1, y, Some(style.white().bold().not_dim()));
    let mut width = title.len() + 2;
    let mut y1 = 1;
    let mut j = 0;
    for (note, sample) in sampler.mapped.iter()
        .map(|(note, sample)|(Some(note), sample))
        .chain(sampler.unmapped.iter().map(|sample|(None, sample)))
    {
        if y1 >= height {
            break
        }
        let active = j == sampler.cursor.0;
        width = width.max(
            draw_sample(to, x, y + y1, note, &*sample.read().unwrap(), active)?
        );
        y1 = y1 + 1;
        j = j + 1;
    }
    let height = ((2 + y1) as u16).min(height);
    //Ok(Some([x, y, (width as u16).min(to.area().w()), height]))
    Ok(())
}

fn draw_sample (
    to: &mut TuiOutput, x: u16, y: u16, note: Option<&u7>, sample: &Sample, focus: bool
) -> Usually<usize> {
    let style = if focus { Style::default().green() } else { Style::default() };
    if focus {
        to.blit(&"🬴", x+1, y, Some(style.bold()));
    }
    let label1 = format!("{:3} {:12}",
        note.map(|n|n.to_string()).unwrap_or(String::default()),
        sample.name);
    let label2 = format!("{:>6} {:>6}  +0.0",
        sample.start,
        sample.end);
    to.blit(&label1, x+2, y, Some(style.bold()));
    to.blit(&label2, x+3+label1.len()as u16, y, Some(style));
    Ok(label1.len() + label2.len() + 4)
}

impl Widget for AddSampleModal {
    type Engine = Tui;
    fn layout (&self, to: [u16;2]) -> Perhaps<[u16;2]> {
        todo!()
        //Align::Center(()).layout(to)
    }
    fn render (&self, to: &mut TuiOutput) -> Usually<()> {
        todo!()
        //let area = to.area();
        //to.make_dim();
        //let area = center_box(
            //area,
            //64.max(area.w().saturating_sub(8)),
            //20.max(area.w().saturating_sub(8)),
        //);
        //to.fill_fg(area, Color::Reset);
        //to.fill_bg(area, Nord::bg_lo(true, true));
        //to.fill_char(area, ' ');
        //to.blit(&format!("{}", &self.dir.to_string_lossy()), area.x()+2, area.y()+1, Some(Style::default().bold()))?;
        //to.blit(&"Select sample:", area.x()+2, area.y()+2, Some(Style::default().bold()))?;
        //for (i, (is_dir, name)) in self.subdirs.iter()
            //.map(|path|(true, path))
            //.chain(self.files.iter().map(|path|(false, path)))
            //.enumerate()
            //.skip(self.offset)
        //{
            //if i >= area.h() as usize - 4 {
                //break
            //}
            //let t = if is_dir { "" } else { "" };
            //let line = format!("{t} {}", name.to_string_lossy());
            //let line = &line[..line.len().min(area.w() as usize - 4)];
            //to.blit(&line, area.x() + 2, area.y() + 3 + i as u16, Some(if i == self.cursor {
                //Style::default().green()
            //} else {
                //Style::default().white()
            //}))?;
        //}
        //Lozenge(Style::default()).draw(to)
    }
}