use eyes::parse;

fn main() {
    let input = aoc::input!();
    println!("part 1: {}", part1(&input));
    println!("part 1: {}", part2(&input));
}

fn part1(input: &str) -> i64 {
    input
        .lines()
        .map(|line| parse!(line, "{} {}", char, char))
        .map(|(them, you)| ((them as u8 - b'A') as i64, (you as u8 - b'X') as i64))
        .map(|(them, you)| ((you + 4 - them) % 3 * 3) + (you + 1)) // (outcome score) + (shape score)
        .sum::<i64>()
}

fn part2(input: &str) -> i64 {
    input
        .lines()
        .map(|line| parse!(line, "{} {}", char, char))
        .map(|(them, you)| ((them as u8 - b'A') as i64, (you as u8 - b'X') as i64))
        .map(|(them, you)| (you * 3) + ((you + 2 + them) % 3 + 1)) // (outcome score) + (shape score)
        .sum::<i64>()
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn examples() {
        let example = "A Y\nB X\nC Z";
        assert_eq!(part1(example), 15);
        assert_eq!(part2(example), 12);
    }
}