mod elven_calories;

use std::fs::File;
use std::io::BufRead;
use std::io::BufReader;

use clap::Arg;
use clap::Command;
use itertools::Itertools;

use elven_calories::Elvish;

fn main() {
    let matches = Command::new("Day1").arg(Arg::new("filename")).get_matches();
    let filename = matches
        .get_one::<String>("filename")
        .expect("Need a filename");
    println!("Processing {}...", filename);

    let file = File::open(filename).expect("Can't read file");
    let reader = BufReader::new(file);

    let calories = reader
        .lines()
        .elf()
        .sorted_by(|a, b| b.cmp(a))
        .take(3)
        .sum::<u32>();

    println!("Sum: {:?}", calories)
}