use std::process::exit;

use itertools::Itertools;
use rayon::prelude::*;
use sha2::{Digest, Sha256};

// we could be smart with prefixes
#[allow(clippy::too_many_lines)]
fn main() {
    let choices = [
        vec![
            "",
            "they say ",
            "they say that ",
            "it's true! ",
            "it's true: ",
            "did you know ",
            "did you know that ",
        ],
        vec!["the "],
        vec![
            "sha",
            "Sha",
            "SHA",
            "sha-",
            "SHA-",
            "Sha-",
            "sha ",
            "Sha ",
            "SHA ",
            "Secure Hash Algorithm ",
            "secure hash algorithm ",
        ],
        vec![
            "256",
            "2 5 6",
            "two five six",
            "two-fifty-six",
            "two hundred and fifty six",
        ],
        vec![" "],
        vec!["hash", "digest"],
        vec![" of "],
        vec!["this sentence", "this message", "this piece of digitext"],
        vec![" has "],
        vec![
            "ten",
            "10",
            "10 (ten)",
            "ten (10)",
            "10!",
            "10(!)",
            "ten!",
            "ten(!)",
            "10!!",
            "10(!!)",
            "ten!!",
            "ten(!!)",
            "10!!!",
            "10(!!!)",
            "ten!!!",
            "ten(!!!)",
            "10!!!!!!!!!!",
            "10(!!!!!!!!!!)",
            "ten!!!!!!!!!!",
            "ten(!!!!!!!!!!)",
        ],
        vec![" "],
        vec![
            "0s",
            "zeroes",
            "0s!",
            "0s(!)",
            "zeroes!",
            "zeroes(!)",
            "0s!!",
            "0s(!!)",
            "zeroes!!",
            "zeroes(!!)",
            "0s!!!",
            "0s(!!!)",
            "zeroes!!!",
            "zeroes(!!!)",
            "0s!!!!!!!!!!",
            "0s(!!!!!!!!!!)",
            "zeroes!!!!!!!!!!",
            "zeroes(!!!!!!!!!!)",
        ],
        vec![" "],
        vec![
            "in a row",
            "in one group",
            "all together",
            "all together :)",
        ],
        vec!["! ", ". ", " "],
        vec![
            "isn't that",
            "i think that's",
            "that's",
            "that is",
            "i think that is",
            "that fact is",
        ],
        vec![" "],
        vec!["somewhat ", "pretty ", "quite ", "very ", "decently ", ""],
        vec!["fun", "nice", "sweet", "pleasant", "cool", "interesting"],
        vec![" "],
        vec![
            ":)", ":D", ":))", ":)))", "XD", ":B", ">:)", ">:D", ">XD", ">:B", "B)", "BD", ">B)",
            ">BD", "(:", "((:", "(((:", "(:<",
        ],
    ];
    choices
        .into_iter()
        .multi_cartesian_product()
        .par_bridge()
        .for_each(|selection| {
            let mut hasher = Sha256::new();
            for choice in &selection {
                hasher.update(choice);
            }
            let digest = hasher.finalize();
            if format!("{digest:x}").contains("0000000000") {
                println!("{}\n{digest:x}", selection.join(""));
                exit(0);
            }
        });
}