//! Scene carriage (`extensions/scene-carriage.md`): the committed corpus regenerates byte for
//! byte (every export written, every import read back to its bundle or refused as stated), and
//! the extension's §8 lists the codes the reference reports.

use std::collections::BTreeMap;
use std::path::{Path, PathBuf};

use wai::scene_map::{corpus, CODES};

fn root() -> PathBuf {
    Path::new(env!("CARGO_MANIFEST_DIR")).join("../live-conformance/scene")
}

fn walk(root: &Path, rel: &str, out: &mut BTreeMap<String, Vec<u8>>) {
    for e in std::fs::read_dir(root.join(rel)).unwrap().flatten() {
        let name = e.file_name().to_string_lossy().into_owned();
        let key = if rel.is_empty() { name } else { format!("{rel}/{name}") };
        if e.path().is_dir() {
            walk(root, &key, out);
        } else if key != "README.md" && key != ".gitattributes" {
            out.insert(key, std::fs::read(e.path()).unwrap());
        }
    }
}

#[test]
fn the_committed_corpus_regenerates_byte_for_byte() {
    let mut files = BTreeMap::new();
    walk(&root(), "", &mut files);
    let inputs: BTreeMap<String, Vec<u8>> = corpus::INPUT_FILES.iter().map(|(p, _)| (p.to_string(), std::fs::read(root().join(p)).unwrap())).collect();
    let bad = corpus::verify(&files, &inputs);
    assert!(bad.is_empty(), "{bad:#?}");
}

#[test]
fn the_extension_lists_every_code_the_reference_reports() {
    let text = std::fs::read_to_string(Path::new(env!("CARGO_MANIFEST_DIR")).join("../extensions/scene-carriage.md")).unwrap();
    let sec = text.split("\n## 8.").nth(1).expect("§8").split("\n## ").next().unwrap();
    let listed: Vec<&str> = sec.lines().filter_map(|l| l.strip_prefix("| `")).filter_map(|l| l.split('`').next()).collect();
    assert_eq!(listed, CODES, "§8's table, in order");
}