use std::io::Write;

fn main() {
    let files = std::fs::read_dir("tests/test_cases").unwrap();
    let mut output_file = std::fs::File::create("tests/datatests/mod.rs").unwrap();
    output_file
        .write_all(
            b"// This file is generated by build.rs

use std::path::Path;
use std::fs::File;
use std::io::Read;
use super::common::TestCase;
use super::get_library;

fn integration_tests(input: &Path) {
    let mut str: String = \"\".to_string();
    let mut file = File::open(input).unwrap();
    file.read_to_string(&mut str).unwrap();
    let test_case = serde_yaml::from_str::<TestCase>(&str).unwrap();
    println!(\"\tRunning integration test {}\", test_case.name);
    test_case.run_test(get_library());
}

",
        )
        .unwrap();
    for file in files {
        let file = file.unwrap();
        let path = file.path();
        let path_str = path.to_str().unwrap();
        if path_str.ends_with(".yaml") {
            println!("cargo:rerun-if-changed={}", path_str);
        }
        let file_name = path.file_stem().unwrap().to_str().unwrap();

        write!(
            output_file,
            "
#[test]
fn {}() {{
    integration_tests(Path::new(\"{}\"));
}}

        ",
            file_name,
            path.to_str().unwrap(),
        )
        .unwrap();
    }
}