use std::fs::read_to_string;
use chrono::Datelike;
use clap::{App, Arg};
use crate::day01::Day01;
use crate::day02::Day02;
use crate::day03::Day03;
use crate::day04::Day04;
use crate::day05::Day05;
use crate::day06::Day06;
use crate::day07::Day07;
use crate::day::Day;
use anyhow::Result;
use crate::day08::Day08;
use crate::day09::Day09;
use crate::day10::Day10;
use crate::day11::Day11;
use crate::day12::Day12;
use crate::day13::Day13;
use crate::day14::Day14;
use crate::day15::Day15;
use crate::day16::Day16;
use crate::day17::Day17;

mod day;
mod day01;
mod day02;
mod day03;
mod day04;
mod day05;
mod day06;
mod day07;
mod day08;
mod day09;
mod day10;
mod day11;
mod day12;
mod day13;
mod day14;
mod day15;
mod day16;
mod day17;

fn load_input(day: &str) -> Result<String> {
    read_to_string(format!("./input/day{}", day)).map_err(|x| x.into())
}

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

fn main() -> anyhow::Result<()> {
    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(Day01::init(load_input("01")?)?),
                                       Box::new(Day02::init(load_input("02")?)?),
                                       Box::new(Day03::init(load_input("03")?)?),
                                       Box::new(Day04::init(load_input("04")?)?),
                                       Box::new(Day05::init(load_input("05")?)?),
                                       Box::new(Day06::init(load_input("06")?)?),
                                       Box::new(Day07::init(load_input("07")?)?),
                                       Box::new(Day08::init(load_input("08")?)?),
                                       Box::new(Day09::init(load_input("09")?)?),
                                       Box::new(Day10::init(load_input("10")?)?),
                                       Box::new(Day11::init(load_input("11")?)?),
                                       Box::new(Day12::init(load_input("12")?)?),
                                       Box::new(Day13::init(load_input("13")?)?),
                                       Box::new(Day14::init(load_input("14")?)?),
                                       Box::new(Day15::init(load_input("15")?)?),
                                       Box::new(Day16::init(load_input("16")?)?),
                                       Box::new(Day17::init(load_input("17")?)?),];

    let _verbosity = matches.occurrences_of("v");
    if matches.is_present("all") {
        let l = days.len();
        println!("running {} days!", l);
        for v in 1..=l {
            run_day(&days, v)?;
        }
    } else if let Some(d) = matches.values_of("DAY") {
        let d = d.map(str::parse);
        for v in d {
            run_day(&days, v?)?;
        }
    } else {
        let v = chrono::Local::now();
        if v.month() != 12 {
            println!("This was really only meant to be used in december...");
        }
        run_day(&days, v.day() as usize)?;
    }
    Ok(())
}