use std::io::Write;

fn main() {
    let out_dir = std::env::var("OUT_DIR").unwrap();
    let destination = std::path::Path::new(&out_dir).join("reftests.rs");
    let mut f = std::fs::File::create(&destination).unwrap();

    let root_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap();
    let reftests_dir = std::path::Path::new(&root_dir).join("../../tests/xc2bit/reftests");
    let files = std::fs::read_dir(reftests_dir);

    if let Ok(files) = files {
        for file in files {
            let path = file.expect("failed to get path").path();
            if path.extension().expect("bogus reftest filename (doesn't have extension)") == "jed" {
                let path = path.canonicalize().unwrap();

                let id_string = path.file_name().unwrap().to_str().unwrap().chars().map(|x| match x {
                    'A'..='Z' | 'a'..='z' | '0'..='9' => x,
                    _ => '_',
                }).collect::<String>();

                write!(f, r#"
                    #[test]
                    fn reftest_{}() {{
                        run_one_reftest("{}");
                    }}
                    "#, id_string, path.to_str().unwrap()).unwrap();
            }
        }
    }
}