//! Are the 37 equal-button-count `GP_DIALOG` pairs language pairs, or not?
//!
//! 26 of 65 adjacent pairs differ in BUTTON COUNT — two languages cannot, so those
//! are unrelated dialogs. For the rest my language reading was left UNSUPPORTED
//! rather than refuted, and both agents observed that nothing rewards closing it.
//!
//! A language pair must share its BUTTON NAMES and ROWS exactly (a locale changes
//! glyphs, not layout) and differ only elsewhere. An unrelated pair will differ in
//! button names or rows too.
//!
//! CONTROL: entries 2/3 (identical element sets) must come out as "buttons match".
//!
//!     cargo run -p sylpheed-formats --example dialog_pair_37
use std::path::PathBuf;
use sylpheed_formats::{pak::PakArchive, ui_layout};

fn sig(ar: &PakArchive, i: usize) -> Option<(Vec<(String, i32)>, usize)> {
    let by = ar.read(&ar.entries()[i]).ok()?;
    let b = ui_layout::parse_build(&by)?;
    let mut v: Vec<(String, i32)> = b
        .elements
        .iter()
        .filter(|e| e.name.contains("btn"))
        .map(|e| {
            (
                e.name.clone(),
                e.rest().map(|k| k.y).unwrap_or(e.pivot_y as i32),
            )
        })
        .collect();
    v.sort();
    let n = v.len();
    Some((v, n))
}

fn main() {
    let root = PathBuf::from(std::env::var("SYLPHEED_DISC").expect("SYLPHEED_DISC"));
    let ar = PakArchive::open(root.join("dat/GP_DIALOG.pak")).expect("GP_DIALOG");
    let n = ar.entries().len();
    let (mut match_btn, mut differ_btn, mut ctrl) = (0, 0, false);
    let mut examples = 0;
    for k in (0..n).step_by(2) {
        let (Some((a, na)), Some((b, nb))) = (sig(&ar, k), sig(&ar, k + 1)) else {
            continue;
        };
        if na != nb {
            continue; // the 26 already settled
        }
        if a == b {
            match_btn += 1;
            if k == 2 {
                ctrl = true
            }
        } else {
            differ_btn += 1;
            if examples < 5 {
                println!("   entries {k:3}/{:<3} buttons DIFFER", k + 1);
                println!("        {:?}", a.iter().map(|x| &x.0).collect::<Vec<_>>());
                println!("        {:?}", b.iter().map(|x| &x.0).collect::<Vec<_>>());
                examples += 1;
            }
        }
    }
    println!("\nequal-button-count pairs whose button NAMES+ROWS match : {match_btn}");
    println!("equal-button-count pairs whose buttons DIFFER          : {differ_btn}");
    println!(
        "control (entries 2/3 counted as matching): {}",
        if ctrl { "PASSED" } else { "FAILED" }
    );
}