use std::io::Write;

#[cfg(debug_assertions)]
const INPUT: &str = "abc";
#[cfg(not(debug_assertions))]
const INPUT: &str = "cxdnnyjw";
// const INPUT: &str = "abc";

fn main() {
    part1();

    part2();
}

fn part2() {
    let mut result = [' '; 8];

    for i in 0_i64.. {
        let s = format!("{INPUT}{i}");
        let digest = md5::compute(s);

        let result_string = format!("{:x}", digest);

        if result_string.chars().take(5).all(|c| c == '0') {
            let mut chars = result_string.chars();
            let the_position = chars.nth(5).unwrap();
            let the_char = chars.next().unwrap();

            if ('0'..'8').contains(&the_position) {
                let position = the_position.to_string().parse::<usize>().unwrap();
                if result[position] == ' ' {
                    result[position] = the_char;
                    print!("\r{}", result.iter().collect::<String>());
                    std::io::stdout().flush().unwrap();
                }
            }
            if !result.contains(&' ') {
                break;
            }
        };
    }
    println!();
}

fn part1() {
    let mut result = vec![];
    for i in 0_i64.. {
        let s = format!("{INPUT}{i}");
        let digest = md5::compute(s);

        let result_string = format!("{:x}", digest);

        if let Some(the_char) = result_string
            .chars()
            .take(5)
            .all(|c| c == '0')
            .then(|| result_string.chars().nth(5).unwrap())
        {
            print!("{the_char}");
            std::io::stdout().flush().unwrap();
            result.push(the_char);
            if result.len() == 8 {
                break;
            }
        };
    }
    println!();
}