use std::fs::File;
use std::io::{self, BufRead};
use std::path::Path;

fn main() {
    let file_path = String::from("input");
    let mut result = 0;

    println!("In file {}", file_path);

    if let Ok(lines) = read_lines(file_path) {
        // Consumes the iterator, returns an (Optional) String
        for line in lines {
            if let Ok(ip) = line {
                match ip.as_str() {
                    "A X" => result += 3 + 0,
                    "A Y" => result += 1 + 3,
                    "A Z" => result += 2 + 6,
                    "B X" => result += 1 + 0,
                    "B Y" => result += 2 + 3,
                    "B Z" => result += 3 + 6,
                    "C X" => result += 2 + 0,
                    "C Y" => result += 3 + 3,
                    "C Z" => result += 1 + 6,
                    _ => result += 0,
                }
            }
        }
    }

    println!("{}", result);
}

fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
where P: AsRef<Path>, {
    let file = File::open(filename)?;
    Ok(io::BufReader::new(file).lines())
}