logru 0.4.1

use std::time::Instant;

fn main() {
    let repeats = std::env::args()
        .nth(1)
        .and_then(|arg| arg.parse().ok())
        .unwrap_or(1);

    let mut u = logru::textual::TextualUniverse::new();
    u.load_str(include_str!("../testfiles/zebra.lru")).unwrap();

    let query = u.prepare_query("puzzle(Houses).").unwrap();
    for i in 0..repeats {
        let search = logru::query_dfs(u.resolver(), query.query());
        let before = Instant::now();
        let solutions = search.collect::<Vec<_>>();
        let duration = before.elapsed();

        for solution in solutions.iter() {
            if i == 0 {
                for var in solution.vars() {
                    if let Some(term) = var {
                        println!("{}", query.pretty().term_to_string(term));
                    } else {
                        println!("<bug: no solution>");
                    }
                }
            }
        }
        if i == 0 {
            println!(
                "Took {:.3}s with {} solutions",
                duration.as_secs_f64(),
                solutions.len()
            );
        }
    }
}