//! Is `GP_DIALOG` 2/3 the ONLY build on the disc with four buttons at 259/329/399/469?
//!
//! Both agents recorded the same reach on the DIFFICULTY identification: entries
//! 2/3 are picked out by button count and geometry, not by a binding from
//! `DLG_SELECT_DIFFICULTY` to a pak entry, so "another four-button dialog with the
//! same rows would be indistinguishable". This tests whether such a rival exists.
//!
//! CONTROL: the scan must find GP_DIALOG 2 and 3 themselves. A rival-search that
//! cannot find the incumbent proves nothing.
//!
//!     cargo run -p sylpheed-formats --example four_button_row_rivals
use std::path::PathBuf;
use sylpheed_formats::{pak::PakArchive, ui_layout};

const WANT: [i32; 4] = [259, 329, 399, 469];

fn main() {
    let root = PathBuf::from(std::env::var("SYLPHEED_DISC").expect("SYLPHEED_DISC"));
    let mut paks: Vec<_> = std::fs::read_dir(root.join("dat"))
        .expect("dat")
        .filter_map(|e| e.ok().map(|e| e.path()))
        .filter(|p| p.extension().map(|x| x == "pak").unwrap_or(false))
        .collect();
    paks.sort();
    let (mut incumbent, mut rivals) = (0, 0);
    for p in &paks {
        let Ok(ar) = PakArchive::open(p) else {
            continue;
        };
        let pname = p.file_name().unwrap().to_string_lossy().to_string();
        for (i, e) in ar.entries().iter().enumerate() {
            let Ok(by) = ar.read(e) else { continue };
            let Some(b) = ui_layout::parse_build(&by) else {
                continue;
            };
            let mut ys: Vec<i32> = b
                .elements
                .iter()
                .filter(|el| el.name.contains("btn") && !el.name.contains('f'))
                .map(|el| el.rest().map(|k| k.y).unwrap_or(el.pivot_y as i32))
                .collect();
            ys.sort();
            ys.dedup();
            if ys.len() != 4 {
                continue;
            }
            let close = ys.iter().zip(WANT.iter()).all(|(a, b)| (a - b).abs() <= 6);
            if close {
                let is_inc = pname == "GP_DIALOG.pak" && (i == 2 || i == 3);
                if is_inc {
                    incumbent += 1
                } else {
                    rivals += 1
                }
                println!(
                    "  {}{pname:24} entry {i:4}  rows {ys:?}",
                    if is_inc { "INCUMBENT " } else { "RIVAL     " }
                );
            }
        }
    }
    println!(
        "\ncontrol: found {incumbent} incumbent build(s) (want 2) — {}",
        if incumbent == 2 { "PASSED" } else { "FAILED" }
    );
    println!("{rivals} rival build(s) elsewhere on the disc");
}