//! Where does `settle_window()`'s answer come from? The port agent recomputes the
//! publisher splash's widest keyframe-free gap as 190 units; `--settle` reports 8.
//! One of the two readings is wrong and the file settles it.
//!     cargo run -p sylpheed-formats --example settle_window_check -- <build>
use std::path::PathBuf;
use sylpheed_formats::{pak::PakArchive, ui_layout};
fn main() {
    let b: usize = std::env::args()
        .nth(1)
        .unwrap_or("10".into())
        .parse()
        .unwrap();
    let root = PathBuf::from(std::env::var("SYLPHEED_DISC").expect("SYLPHEED_DISC"));
    let ar = PakArchive::open(root.join("dat/GP_TITLE.pak")).expect("GP_TITLE");
    let by = ar.read(&ar.entries()[b]).expect("entry");
    let build = ui_layout::parse_build(&by).expect("parse");
    println!("entry {b}: {} elements", build.elements.len());
    for el in &build.elements {
        let ts: Vec<String> = el
            .keyframes
            .iter()
            .map(|k| k.time.map(|v| v.to_string()).unwrap_or("-".into()))
            .collect();
        println!("   {:26} [{}]", el.name, ts.join(" "));
    }
    let mut ts: Vec<u32> = build
        .elements
        .iter()
        .flat_map(|e| e.keyframes.iter().filter_map(|k| k.time))
        .collect();
    ts.sort_unstable();
    ts.dedup();
    println!("\nunion of all element keyframe times: {ts:?}");
    let gaps: Vec<(u32, u32, u32)> = ts.windows(2).map(|w| (w[1] - w[0], w[0], w[1])).collect();
    let mut g = gaps.clone();
    g.sort_by_key(|a| std::cmp::Reverse(a.0));
    println!("widest gaps: {:?}", &g[..g.len().min(4)]);
    println!("settle_window() reports {:?}", build.settle_window());
}