//! Is `GP_DIALOG` entry 2 the `DLG_SELECT_DIFFICULTY` screen?
//!
//! The image lists `DLG_SELECT_DIFFICULTY` among the `DLG_*` names at
//! `0x820A41BB`, so DIFFICULTY is a DIALOG, not a GamePart screen with its own
//! pak — which is why a search for an 8-record `btn` build in a difficulty-named
//! archive found nothing. `GP_DIALOG` entry 2 carries `pcbtn00`..`03`: four
//! buttons, matching EASY / NORMAL / HARD / BACK.
//!
//! CONTROL: `GP_TITLE` entry 5's five buttons must come back at the rows the disc
//! is independently known to place them (162/242/322/401/482, spacing 80).
//!
//!     cargo run -p sylpheed-formats --example dialog_button_rows
use std::path::PathBuf;
use sylpheed_formats::{pak::PakArchive, ui_layout};

fn rows(ar: &PakArchive, entry: usize, what: &str) {
    let Ok(by) = ar.read(&ar.entries()[entry]) else {
        return;
    };
    let Some(b) = ui_layout::parse_build(&by) else {
        return;
    };
    let mut v: Vec<(i32, String)> = b
        .elements
        .iter()
        .filter(|e| {
            let n = &e.name;
            (n.starts_with("pcbtn") || n.starts_with("ptbtn")) && !n.contains('f')
        })
        .map(|e| {
            (
                e.rest().map(|k| k.y).unwrap_or(e.pivot_y as i32),
                e.name.clone(),
            )
        })
        .collect();
    v.sort_by_key(|r| r.0);
    println!("\n{what} (entry {entry}):");
    for (y, n) in &v {
        println!("   y {y:5}  {n}");
    }
    if v.len() > 1 {
        let sp: Vec<i32> = v.windows(2).map(|w| w[1].0 - w[0].0).collect();
        println!("   spacing {sp:?}");
    }
}

fn main() {
    let root = PathBuf::from(std::env::var("SYLPHEED_DISC").expect("SYLPHEED_DISC"));
    let t = PakArchive::open(root.join("dat/GP_TITLE.pak")).expect("GP_TITLE");
    rows(
        &t,
        5,
        "CONTROL: GP_TITLE main menu (must be 162/242/322/401/482)",
    );
    let d = PakArchive::open(root.join("dat/GP_DIALOG.pak")).expect("GP_DIALOG");
    rows(&d, 2, "GP_DIALOG candidate for DLG_SELECT_DIFFICULTY");
    rows(&d, 3, "GP_DIALOG entry 3 (the pair)");
}