use clap::{arg, command, value_parser, ArgAction};
use std::path::PathBuf;

// https://docs.rs/clap/latest/clap/_tutorial/chapter_0/index.html

use sudoku::ksudoku::load_ksudoku;
use sudoku::sudoku::*;

fn main() {
    let mut s = Sudoku::new();

    let args = command!()
        .arg(
            arg!(-f --file <FILE> "Filename to load")
                .required(false)
                .value_parser(value_parser!(PathBuf)),
        )
        .arg(
            arg!(
                -m --make ... "Make a new sudoku puzzle"
            )
            .action(ArgAction::SetTrue),
        )
        .arg(arg!(-b --brute ... "Brute Force Solver").action(ArgAction::SetTrue))
        .get_matches();

    if args.get_flag("make") {
        s.make();
        s.display();
        return;
    }

    if let Some(filename) = args.get_one::<PathBuf>("file") {
        let puzzle = load_ksudoku(filename.to_path_buf()).unwrap();
        // Ksudoku is stored TLD.
        s.load_from_tld('b', '_', puzzle.as_str());
        s.display();
        s.display_possible();

        if args.get_flag("brute") {
            println!("Solutions: {}", s.bruteforce_solver());
        } else {
            while s.solve() {
                println!("Try it again...");
                s.display();
                s.display_possible();
            }
        }
    }
}