// Leave-one-out over the elements that touch a band, dumping raw RGBA each time.
use sylpheed_formats::{pak, ui_layout};
fn main(){
    let mut a=std::env::args().skip(1);
    let pk=a.next().unwrap();
    let bi:usize=a.next().unwrap().parse().unwrap();
    let dir=a.next().unwrap();
    let ar=pak::PakArchive::open(pk).unwrap();
    let by=ar.read(&ar.entries()[bi]).unwrap();
    let b=ui_layout::parse_build(&by).unwrap();
    let o=ui_layout::ComposeOptions{ backdrop:[0,0,0,255], ..Default::default() };
    let n=b.elements.len();
    let base=ui_layout::compose(&b,&by,o.clone(),None);
    std::fs::write(format!("{dir}/base.raw"),&base.rgba).unwrap();
    println!("canvas {}x{}  elements {n}", base.width, base.height);
    for i in 0..n {
        let e=&b.elements[i];
        let Some(kf)=e.rest() else { continue };
        // only bother with elements whose rest pose can touch the band
        let mut v=vec![true;n]; v[i]=false;
        let c=ui_layout::compose(&b,&by,o.clone(),Some(&v));
        std::fs::write(format!("{dir}/wo-{i}.raw"),&c.rgba).unwrap();
        println!("{i}\t{}\t{}\t({},{})\ta={}", e.name,
                 e.sprite.clone().unwrap_or_default(), kf.x, kf.y, kf.fade>>24);
    }
}