use std::fs::read_to_string;
use std::time::SystemTime;
use chrono::Datelike;
use clap::{App, Arg, SubCommand};
use crate::day1::Day1;
use crate::day::Day;

mod day;
mod day1;

fn load_input(day: &str) -> String {
    read_to_string(format!("./input/day{}", day)).expect("Could not load input")
}

fn run_day(days: &Vec<Box<dyn Day>>, day: usize) {
    if let Some(d) = days.get(day - 1) {
        let day_code = d.clone();
        println!("Running day {}!", day);
        println!("\tPart 1: {}", d.part1());
        println!("\tPart 2: {}", day_code.part2());
    } else {
        eprintln!("Day {} is not available!", day);
    }
}

fn main() {
    let matches = App::new("AOC Time!")
        .version("1.0")
        .author("J00LZ")
        .about("How to overengineer AOC in a single program...")
        .arg(Arg::with_name("v")
            .short("v")
            .multiple(true)
            .help("Sets the level of verbosity"))
        .arg(Arg::with_name("all")
            .short("a")
            .long("all")
            .help("run all available days"))
        .arg(Arg::with_name("DAY")
            .takes_value(true)
            .multiple(true))
        .get_matches();

    let days: Vec<Box<dyn Day>> = vec![Box::new(Day1::init(load_input("1")))];

    let verbosity = matches.occurrences_of("v");
    if matches.is_present("all") {
        let l = days.len();
        println!("running {} days!", l);
        for v in 1..l + 1 {
            run_day(&days, v);
        }
    } else if let Some(d) = matches.values_of("DAY") {
        let d = d.map(|x| x.parse::<i32>().expect("Did not provide an int!"));
        for v in d {
            run_day(&days, v as usize);
        }
    } else {
        let v = chrono::Local::now().day();
        run_day(&days, v as usize)
    }
}