use std::path::PathBuf;

use glob::glob;

fn main() {
    generate_tests();
}

fn build_test_case(path: PathBuf) -> String {
    let mut test_name = path.clone();
    test_name.set_extension("");

    let mut components = test_name.components();

    components.next();
    components.next();

    let mut test_name = components.as_path().to_str().unwrap().to_owned();

    test_name = test_name.replace('/', "_");

    format!(
        "\n\n#[test]
fn test_{}() {{
    run_test(\"{}\");
}}",
        test_name,
        path.to_str().unwrap()
    )
}

fn generate_tests() {
    let preamble = "mod common;\n\nuse common::run_test;";

    let mut output = preamble.to_owned();

    for lox_file in glob("tests/lox/**/*.lox").unwrap() {
        let lox_file = lox_file.unwrap();

        output += &build_test_case(lox_file);
    }

    std::fs::write("tests/all_tests.rs", output).unwrap();
}