use std::fmt::format;
use std::time::Instant;
use day01::{part01a, part01b};
use day02::{part02a, part02b};
use day03::{part03a, part03b};

use std::fs::OpenOptions;
use std::io::Write;
use std::io::Result;

fn main() {
    let mut file = OpenOptions::new()
        .write(true)      // Open the file for writing
        .create(true)     // Create the file if it doesn't exist
        .truncate(true)   // Clear the file if it already exists
        .open("solution.md").expect("Cannot open or create file");

    file.write_all(b"# Advent of code 2025\n```").expect("Cannot write to file");

    let exercises: Vec<(&str, fn () -> u64)> = vec![
        ("day01:A", part01a::solve),
        ("day01:B", part01b::solve),
        ("day02:A", part02a::solve),
        ("day02:B", part02b::solve),
        ("day03:A", part03a::solve),
        ("day03:B", part03b::solve),
    ];

    let start: Instant = Instant::now();
    exercises.iter().for_each(|(day, func)| {
        let day_start: Instant = Instant::now();
        let solution = format!("{:7} => {:15}  ({:6}us)\n", day, func(), day_start.elapsed().as_micros());
        print!("{}", solution);
        file.write(solution.as_bytes()).expect("Cannot write to file");
    });

    let banner = "                            ----------\n";
    let end_time = format!("                            {:7}us\n", start.elapsed().as_micros());
    print!("{}", banner);
    file.write(banner.as_bytes()).expect("Cannot write to file");
    println!("{}", end_time);
    file.write(end_time.as_bytes()).expect("Cannot write to file");
    file.write(b"```").expect("Cannot write to file");
}