use crate::Input;
use std::collections::HashMap;

pub fn solve(input: &mut Input) -> Result<u32, String> {
    let mut desired = HashMap::new();
    desired.insert("children", 3);
    desired.insert("cats", 7);
    desired.insert("samoyeds", 2);
    desired.insert("pomeranians", 3);
    desired.insert("akitas", 0);
    desired.insert("vizslas", 0);
    desired.insert("goldfish", 5);
    desired.insert("trees", 3);
    desired.insert("cars", 2);
    desired.insert("perfumes", 1);

    'outer: for (line_idx, line) in input.text.lines().enumerate() {
        let error = || format!("Line {}: Invalid format", line_idx + 1);
        let words = line.split(' ').collect::<Vec<_>>();
        if words.len() % 2 != 0 {
            return Err(error());
        }

        for name_idx in (2..words.len()).step_by(2) {
            let attribute_name = words[name_idx].strip_suffix(':').ok_or_else(error)?;
            let attribute_value = words[name_idx + 1]
                .strip_suffix(',')
                .unwrap_or(words[name_idx + 1])
                .parse::<i32>()
                .map_err(|_| "Unable to parse attribute value")?;

            let desired_value = *desired
                .get(attribute_name)
                .ok_or("Invalid attribute value")?;

            let does_match = match (input.is_part_two(), attribute_name) {
                (true, "cats") | (true, "trees") => desired_value < attribute_value,
                (true, "pomeranians") | (true, "goldfish") => desired_value > attribute_value,
                _ => desired_value == attribute_value,
            };
            if !does_match {
                continue 'outer;
            }
        }
        return Ok(line_idx as u32 + 1);
    }

    Err("No matching Sue found".to_string())
}

#[test]
pub fn tests() {
    use crate::{test_part_one, test_part_two};

    let real_input = include_str!("day16_input.txt");
    test_part_one!(real_input => 213);
    test_part_two!(real_input => 323);
}