//ProjectEulerTS/ProblemSelection.ts
//Matthew Ellison
// Created: 10-18-20
//Modified: 10-18-20
//This class holds all of the functions needed to handle a problem
//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/typescriptClasses
/*
	Copyright (C) 2020  Matthew Ellison

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/


const readlineSync = require("readline-sync");
import { Problem } from "./Problems/Problem";
import { Problem1 } from "./Problems/Problem1";
import { Problem2 } from "./Problems/Problem2";


export class ProblemSelection{
	//Holds the valid problem numbers
	public static PROBLEM_NUMBERS: number[] = [1, 2];

	//Returns the problem corresponding to the given problem number
	public static getProblem(problemNumber: number): Problem{
		let problem: Problem  = null;
		switch(problemNumber){
			case 1 : problem = new Problem1(); break;
			case 2 : problem = new Problem2(); break;
		}
		return problem;
	}
	//Print the description of a problem
	public static printDescription(problemNumber: number): void{
		//Get the problem
		let problem: Problem = ProblemSelection.getProblem(problemNumber);
		//Print the problem's description
		console.log(problem.getDescription() + "\n\n");
	}
	//Solve a problem
	public static solveProblem(problemNumber: number): void{
		//Get the problem
		let problem: Problem = ProblemSelection.getProblem(problemNumber);
		//Print the problem description
		console.log("\n\n" + problem.getDescription());
		//Solve the problem
		problem.solve();
		//Print the results
		console.log(problem.getResult() + "\nIt took " + problem.getTime() + " to solve this problem.\n\n");
	}
	//Get a valid problem number from a user
	public static getProblemNumber(): number{
		let problemNumber: number = 0;
		let prob = readlineSync.question("Enter a problem number: ");
		try{
			problemNumber = parseInt(prob);
		}
		catch(error){
			problemNumber = -1;
		}
		while(!ProblemSelection.PROBLEM_NUMBERS.includes(problemNumber)){
			console.log("That is an invalid problem number!");
			problemNumber = ProblemSelection.getProblemNumber();
		}
		problemNumber = parseInt(prob);
		return problemNumber;
	}
	//List all valid problem numbers
	public static listProblems(): void{
		console.log(ProblemSelection.PROBLEM_NUMBERS[1]);
		for(let problemNumber: number = 2;problemNumber < ProblemSelection.PROBLEM_NUMBERS.length;++problemNumber){
			console.log(", " + ProblemSelection.PROBLEM_NUMBERS[problemNumber]);
		}
		console.log();
	}
}