// use std::io::{self, BufRead};
use rayon::prelude::*;
use sqlx::migrate::MigrateDatabase;
// use std::sync::{Arc, Mutex};
use std::time::Instant;
use tokio;

mod graph;
use crate::graph::Graph;

mod theorems;
// use crate::theorems::{basic, forbidden, toughness};

mod geng;
use crate::geng::GengIterator;

mod compute;

#[tokio::main]
async fn main() -> Result<(), sqlx::Error> {
    dotenv::dotenv().ok();
    let database_url =
        std::env::var("DATABASE_URL").expect("Expected DATABASE_URL in env");
    if !sqlx::Sqlite::database_exists(&database_url).await? {
        sqlx::Sqlite::create_database(&database_url).await?;
    }
    let db = sqlx::SqlitePool::connect(&database_url).await?;
    let _ = sqlx::query!(
        "CREATE TABLE IF NOT EXISTS graphs (g6 VARCHAR NOT NULL);"
    )
    .execute(&db)
    .await;

    // let mut counters = Arc::new(Mutex::new(Counters::new()));

    // gi.par_bridge().for_each(|_| {});

    let gi = GengIterator::new(7);

    // let start = Instant::now();
    // let tasks: Vec<_> = gi
    //     .map(|g| {
    //         // let db = db.clone();
    //         tokio::spawn(compute::async_theorems1(g))
    //     })
    //     .collect();

    // let res: Vec<_> = gi.par_bridge().map(compute::apply_theorems).collect();
    // let res: Vec<_> =
    //     gi.par_bridge().map(compute::dominating_numbers).collect();
    let res: Vec<_> = gi.map(compute::dominating_numbers).collect();

    for pair in &res {
        if let Some(cardinality) = pair.1 {
            if pair.2 != 0 {
                println!("{} {:?} {}", pair.0, cardinality, pair.2);
            }
        }
    }

    // for (a, b) in &res {
    //     println!("{a} {b:?}");
    // }

    // let res = futures::future::join_all(tasks).await;
    // let elapsed = start.elapsed();
    // let time = elapsed.as_nanos();
    // let res = res.iter().map(|e| e.as_ref().unwrap()).collect::<Vec<_>>();
    // println!("len = {}", res.len());
    // println!("Time elapsed: {}s", time as f64 / 1e9);

    // let start = Instant::now();
    // let res = gi
    //     .par_bridge()
    //     .map(compute::apply_theorems)
    //     .collect::<Vec<_>>();
    //
    // let elapsed = start.elapsed();
    // let time = elapsed.as_nanos();
    // println!("len = {}", res.len());
    // println!("Time elapsed: {}s", time as f64 / 1e9);

    /*
    println!("Total count of graphs: {}", counters.graphs);
    println!("Count of 1-tough graphs: {}", counters.tough_1);
    println!("Count of 2-tough graphs: {}", counters.tough_2);
    println!(
        "Count of Dirac's Hamiltonian graphs: {}",
        counters.dirac_hamiltonian
    );
    println!(
        "Count of Ore's Hamiltonian graphs: {}",
        counters.ore_hamiltonian
    );
    println!(
        "Count of Posa's Hamiltonian graphs: {}",
        counters.posa_hamiltonian
    );
    println!(
        "Count of Bondy-Chvatal Hamiltonian graphs: {}",
        counters.bch_hamiltonian
    );
    println!(
        "Count of Theorem 15 Hamiltonian graphs: {}",
        counters.t15_hamiltonian
    );
    println!(
        "Count of Theorem 25 Hamiltonian graphs: {}",
        counters.t25_hamiltonian
    );
    */

    Ok(())
}