use std::env::args;

use chessly::PerftTestCase;

const PERF_FILE_PATH: &str = "tests/perfsuite.epd";
const MAX_DEPTH: u8 = 6;

fn main() {
    let n = args()
        .nth(1)
        .map(|n| n.parse::<usize>().expect("Invalid perft number"));

    let perf_data = std::fs::read_to_string(PERF_FILE_PATH).expect("Unable to read file");

    for (index, case) in perf_data.lines().map(PerftTestCase::try_from).enumerate() {
        if let Some(n) = n {
            if index != n {
                continue;
            }
        }

        let case = case.expect("Invalid test case");

        println!("FEN: {}", case.fen);

        case.run(MAX_DEPTH, |result| {
            let message = if result.is_ok() { "OK" } else { "FAIL" };

            println!(
                "Depth: {} - {}\t{} ({} ms)",
                result.depth,
                result.expected,
                message,
                result.duration.as_millis()
            );
        });
    }
}