use crate::prelude::*;

pub struct Chain {
    name:    String,
    devices: Vec<Box<dyn Device>>,
    focused: usize,
}

impl Chain {
    pub fn new (name: &str, devices: Vec<Box<dyn Device>>) -> Result<DynamicDevice<Self>, Box<dyn Error>> {
        Ok(DynamicDevice::new(render, handle, process, Self {
            name: name.into(),
            devices,
            focused: 0
        }))
    }
}

pub fn process (_: &mut Chain, _: &Client, _: &ProcessScope) -> Control {
    Control::Continue
}

pub fn render (state: &Chain, buf: &mut Buffer, area: Rect)
    -> Usually<Rect>
{
    let Rect { x, y, .. } = area;
    let area = Rect { x, y, width: 40, height: 30 };
    let mut y = area.y;
    buf.set_string(area.x, y, "│", Style::default().black());
    buf.set_string(area.x + area.width - 1, y, "│", Style::default().black());
    buf.set_string(area.x + 2, y, "Input...", Style::default().dim());
    let mut x = 0u16;
    for device in state.devices.iter() {
        let result = device.render(buf, Rect {
            x: area.x,
            y,
            width: area.width,
            height: 21//area.height.saturating_sub(y)
        })?;
        //let result = Rect { x: 0, y: 0, width: result.width, height: 21 };
        x = x.max(result.width);
        y = y + result.height;
        //y = y + 1;
        buf.set_string(area.x, y, "│", Style::default().black());
        buf.set_string(area.x + area.width - 1, y, "│", Style::default().black());
        buf.set_string(area.x + 2, y, "      Patch in ┐ │ └ Patch out", Style::default().dim());
        y = y + 1;
        //buf.set_string(area.x, y, format!("{y}---BOT---"), Style::default().red());
        //buf.set_string(area.x + area.width - 1, area.y + 1, "│", Style::default().black());
        //buf.set_string(area.x + 2, y, "Patch...", Style::default().dim());
    }
    Ok(draw_box(buf, Rect {
        x: area.x,
        y: area.y,
        width:  area.width,
        height: y - area.y,
    }))
}

pub fn handle (_: &mut Chain, _: &AppEvent) -> Usually<bool> {
    Ok(false)
}