adventofcode/2023/day7/src/main.rs

use std::cmp::Ordering;
use std::collections::HashSet;
use std::fs;

static CARDS: &'static str = "23456789TJQKA";
static CARDS2: &'static str = "J23456789TQKA";
#[macro_use(c)]
extern crate cute;

#[derive(Debug, Clone)]
struct Hand<'a> {
    cards: String,
    bid: u32,
    cards_ranking: &'a str,
    original_cards: String,
}

#[derive(Debug)]
enum HandType {
    HighCard,
    OnePair,
    TwoPair,
    ThreeOfAKind,
    FullHouse,
    FourOfAKind,
    FiveOfAKind,
}

impl Hand<'_> {
    fn get_hand_type(&self) -> HandType {
        let uniq_cards: Vec<char> = self
            .cards
            .chars()
            .into_iter()
            .collect::<HashSet<_>>()
            .into_iter()
            .collect::<Vec<char>>();

        let mut cards = c![(key,self.cards.chars().filter(|char| char == &key).collect::<Vec<char>>().len()), for key in uniq_cards];
        cards.sort_by(|a, b| a.1.cmp(&b.1));
        match cards.last().unwrap().1 {
            5 => HandType::FiveOfAKind,
            4 => HandType::FourOfAKind,
            3 if cards.len() == 2 => HandType::FullHouse,
            3 => HandType::ThreeOfAKind,
            2 if cards.len() == 3 => HandType::TwoPair,
            2 => HandType::OnePair,
            1 => HandType::HighCard,
            _ => panic!("Unknown card in {cards:?}"),
        }
    }

    fn replace_jokers(&mut self) {
        if self.cards.contains("J") {
            let mut tmp_vec: Vec<Hand> = Vec::new();
            for elem in CARDS.chars().filter(|letter| letter != &'J') {
                tmp_vec.push(Hand {
                    cards: self.cards.clone().replace("J", elem.to_string().as_str()),
                    bid: 0,
                    cards_ranking: self.cards_ranking.clone(),
                    original_cards: self.original_cards.clone()
                });
            }
            tmp_vec.sort();
            self.cards = tmp_vec.last().unwrap().cards.clone();
        }
    }
}

impl PartialEq for Hand<'_> {
    fn eq(&self, other: &Self) -> bool {
        self.original_cards == other.original_cards
    }
}

impl Eq for Hand<'_> {}

impl Ord for Hand<'_> {
    fn cmp(&self, other: &Self) -> Ordering {
        if self.get_hand_type() as u8 > other.get_hand_type() as u8 {
            return Ordering::Greater;
        }
        if (self.get_hand_type() as u8) < other.get_hand_type() as u8 {
            return Ordering::Less;
        } else {
            for i in 0..5 {
                let selfcard = self.original_cards.chars().collect::<Vec<char>>()[i];
                let othercard = other.original_cards.chars().collect::<Vec<char>>()[i];
                if self.cards_ranking.find(selfcard) > other.cards_ranking.find(othercard) {
                    return Ordering::Greater;
                }
                if self.cards_ranking.find(selfcard) < other.cards_ranking.find(othercard) {
                    return Ordering::Less;
                }
            }
        }
        Ordering::Equal
    }
}

impl PartialOrd for Hand<'_> {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        Some(self.cmp(other))
    }
}

fn main() {
    let content = fs::read_to_string("input").expect("Could not read the file");
    let part1 = part1(content.clone());
    println!("Part 1: {}", part1);
    let part2 = part2(content);
    println!("Part 2: {}", part2);
}
fn part1(content: String) -> i64 {
    let lines = content.split("\n").collect::<Vec<&str>>();
    let mut hands = c![Hand{
        cards: String::from(line.split(" ").collect::<Vec<&str>>()[0]),
        bid: line.split(" ").collect::<Vec<&str>>()[1].parse::<u32>().unwrap(),
        cards_ranking: CARDS,
        original_cards: String::from(line.split(" ").collect::<Vec<&str>>()[0])
    }, for line in lines];
    let mut score: i64 = 0;
    hands.sort();
    for i in 0..hands.len() {
        let hand = hands.get(i).unwrap();
        score += hand.bid as i64 * (i as i64 + 1);
    }
    return score;
}

fn part2(content: String) -> i64 {
    let lines = content.split("\n").collect::<Vec<&str>>();
    let mut hands = c![Hand{
        cards: String::from(line.split(" ").collect::<Vec<&str>>()[0]),
        bid: line.split(" ").collect::<Vec<&str>>()[1].parse::<u32>().unwrap(),
        cards_ranking: CARDS2,
        original_cards: String::from(line.split(" ").collect::<Vec<&str>>()[0])
    }, for line in lines];
    for h in &mut hands {
        h.replace_jokers();
    }
    let mut score: i64 = 0;
    hands.sort();
    for i in 0..hands.len() {
        let hand = hands.get(i).unwrap();
        score += hand.bid as i64 * (i as i64 + 1);
    }

    for h in hands{
        println!("{}:{}\twas\t{}", h.cards, h.bid, h.original_cards)
    }
    return score;
}