use crate::prelude::*;
use super::Sampler;

impl WidgetRef for Sampler {
    fn render_ref (&self, area: Rect, buf: &mut Buffer) {
    }
}

pub fn render (
    state: &mut Sampler,
    stdout: &mut Stdout,
    offset: (u16, u16),
) -> Result<(), Box<dyn Error>> {
    render_table(state, stdout, offset)?;
    render_meters(state, stdout, offset)?;
    Ok(())
}

fn render_table (
    state:  &mut Sampler,
    stdout: &mut Stdout,
    offset: (u16, u16),
) -> Result<(), Box<dyn Error>> {
    let move_to = |col, row| crossterm::cursor::MoveTo(offset.0 + col, offset.1 + row);
    stdout.queue(move_to(0, 3))?.queue(
        Print(" Name     Rate     Trigger      Route")
    )?;
    for (i, sample) in state.samples.lock().unwrap().iter().enumerate() {
        let row = 4 + i as u16;
        for (j, (column, field)) in [
            (0,  format!(" {:7} ",    sample.name)),
            (9,  format!(" {:.1}Hz ", sample.rate)),
            (18, format!(" MIDI C{} {} ", sample.trigger.0, sample.trigger.1)),
            (33, format!(" {:.1}dB -> Output ", sample.gain)),
            (50, format!(" {} ", sample.playing.unwrap_or(0))),
        ].into_iter().enumerate() {
            stdout.queue(move_to(column, row))?;
            if state.selected_sample == i && state.selected_column == j {
                stdout.queue(PrintStyledContent(field.to_string().bold().reverse()))?;
            } else {
                stdout.queue(PrintStyledContent(field.to_string().bold()))?;
            }
        }
    }
    Ok(())
}

fn render_meters (
    state:  &mut Sampler,
    stdout: &mut Stdout,
    offset: (u16, u16),
) -> Result<(), Box<dyn Error>> {
    let move_to = |col, row| crossterm::cursor::MoveTo(offset.0 + col, offset.1 + row);
    for (i, sample) in state.samples.lock().iter().enumerate() {
        let row = 4 + i as u16;
        stdout.queue(move_to(32, row))?.queue(
            PrintStyledContent("▁".green())
        )?;
    }
    Ok(())
}