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

fn main() {
    let file_path = String::from("../aoc_04a/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 {
                let split = ip.split(",");
                let mut vec = Vec::<u32>::new();
                for s in split {
                    let split = s.split("-");
                    for s in split {
                        vec.push(s.parse().unwrap());
                    }
                }
                if !(vec[1] < vec[2] || vec[0] > vec[3]) {
                    result += 1;
                }
            }
        }
    }

    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())
}