//ProjectEulerRust/src/main.rs
//Matthew Ellison
// Created: 06-11-20
//Modified: 06-15-20
//This is a driver function for the Project Euler solutions in Rust
//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/RustClasses
/*
	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/>.
*/


#![allow(non_snake_case)]
#![allow(unused_parens)]
#![allow(non_upper_case_globals)]


mod Problems;


#[derive(PartialEq)]
enum Selections{EMPTY, SOLVE, DESCRIPTION, LIST, EXIT, SIZE}

static problemNumbers: [u32; 18] = [ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9,
									10, 11, 12, 13, 14, 15, 16, 17];

fn main(){
	let mut selection = Selections::EMPTY;
	while(selection != Selections::EXIT){
		printMenu();
		selection = getMenuSelection();

		if(selection == Selections::SOLVE){
			solveMenu();
		}
		else if(selection == Selections::DESCRIPTION){
			descriptionMenu();
		}
		else if(selection == Selections::LIST){
			listProblems();
		}
		else if(selection == Selections::EXIT){

		}
		else{
			printErrorMessage();
		}
	}
}

fn printMenu(){
	println!("{}. Solve a problem", Selections::SOLVE as i32);
	println!("{}. Print a problem description", Selections::DESCRIPTION as i32);
	println!("{}. List valid problem numbers", Selections::LIST as i32);
	println!("{}. Exit\n", Selections::EXIT as i32);
}

fn getMenuSelection() -> Selections{
	//Setup reading from the console
	let mut selectionStr = String::new();

	std::io::stdin().read_line(&mut selectionStr).ok();
	//Convert the read to an int
	let mut selection = selectionStr.trim().parse::<i32>().unwrap();
	while(!isValidMenu(selection)){
		println!("That is an invalid option!");
		printMenu();
		std::io::stdin().read_line(&mut selectionStr).ok();
		selection = selectionStr.trim().parse::<i32>().unwrap();
	}
	return getSelection(selection);
}
fn isValidMenu(selection: i32) -> bool{
	if((selection > 0) && (selection < Selections::SIZE as i32)){
		return true;
	}
	else{
		return false;
	}
}
fn getSelection(selection: i32) -> Selections{
	if(selection == Selections::SOLVE as i32){
		return Selections::SOLVE;
	}
	else if(selection == Selections::DESCRIPTION as i32){
		return Selections::DESCRIPTION;
	}
	else if(selection == Selections::LIST as i32){
		return Selections::LIST;
	}
	else if(selection == Selections::EXIT as i32){
		return Selections::EXIT;
	}
	else{
		return Selections::EMPTY;
	}
}
fn printErrorMessage(){
	println!("That is an invalid selection!");
}
fn solveMenu(){
	let problemNumber = getProblemNumber();
	println!("\n\n");
	//This selection solves all problems in order
	if(problemNumber == 0){
		//Solve to every valid problem number
		for problemLocation in 1..problemNumbers.len() as u32{
			//Solve the problems
			print!("{}. ", problemNumbers[problemLocation as usize]);
			solveProblem(problemNumbers[problemLocation as usize]);
			println!("\n\n");
		}
	}
	//This is if a single problem number was chosen
	else{
		//Solve the problem
		solveProblem(problemNumber);
	}
	println!("\n\n");
}
fn solveProblem(problemNumber: u32){
	if(problemNumber == 1){
		println!("{}", Problems::Problem1::getDescription());
		println!("{}", Problems::Problem1::solve());
	}
	else if(problemNumber == 2){
		println!("{}", Problems::Problem2::getDescription());
		println!("{}", Problems::Problem2::solve());
	}
	else if(problemNumber == 3){
		println!("{}", Problems::Problem3::getDescription());
		println!("{}", Problems::Problem3::solve());
	}
	else if(problemNumber == 4){
		println!("{}", Problems::Problem4::getDescription());
		println!("{}", Problems::Problem4::solve());
	}
	else if(problemNumber == 5){
		println!("{}", Problems::Problem5::getDescription());
		println!("{}", Problems::Problem5::solve());
	}
	else if(problemNumber == 6){
		println!("{}", Problems::Problem6::getDescription());
		println!("{}", Problems::Problem6::solve());
	}
	else if(problemNumber == 7){
		println!("{}", Problems::Problem7::getDescription());
		println!("{}", Problems::Problem7::solve());
	}
	else if(problemNumber == 8){
		println!("{}", Problems::Problem8::getDescription());
		println!("{}", Problems::Problem8::solve());
	}
	else if(problemNumber == 9){
		println!("{}", Problems::Problem9::getDescription());
		println!("{}", Problems::Problem9::solve());
	}
	else if(problemNumber == 10){
		println!("{}", Problems::Problem10::getDescription());
		println!("{}", Problems::Problem10::solve());
	}
	else if(problemNumber == 11){
		println!("{}", Problems::Problem11::getDescription());
		println!("{}", Problems::Problem11::solve());
	}
	else if(problemNumber == 12){
		println!("{}", Problems::Problem12::getDescription());
		println!("{}", Problems::Problem12::solve());
	}
	else if(problemNumber == 13){
		println!("{}", Problems::Problem13::getDescription());
		println!("{}", Problems::Problem13::solve());
	}
	else if(problemNumber == 14){
		println!("{}", Problems::Problem14::getDescription());
		println!("{}", Problems::Problem14::solve());
	}
	else if(problemNumber == 15){
		println!("{}", Problems::Problem15::getDescription());
		println!("{}", Problems::Problem15::solve());
	}
	else if(problemNumber == 16){
		println!("{}", Problems::Problem16::getDescription());
		println!("{}", Problems::Problem16::solve());
	}
	else if(problemNumber == 17){
		println!("{}", Problems::Problem17::getDescription());
		println!("{}", Problems::Problem17::solve());
	}
}
fn descriptionMenu(){
	//Give some extra space to print the description
	println!("\n\n");

	//Get the problem number
	let problemNumber = getProblemNumber();

	//If the problem number is 0 then print out all the descriptions
	if(problemNumber == 0){
		//Print decription for every valid problem number
		for problemLocation in 1..problemNumbers.len(){
			//Print the problem's description
			print!("{}. ", problemNumbers[problemLocation]);
			printDescription(problemNumbers[problemLocation]);
			println!();
		}
	}
	//Otherwise print out a single problem's description
	else{
		printDescription(problemNumber);
	}
	println!("\n\n");
}
fn printDescription(problemNumber: u32){
	if(problemNumber == 1){
		println!("{}", Problems::Problem1::getDescription());
	}
	else if(problemNumber == 2){
		println!("{}", Problems::Problem2::getDescription());
	}
	else if(problemNumber == 3){
		println!("{}", Problems::Problem3::getDescription());
	}
	else if(problemNumber == 4){
		println!("{}", Problems::Problem4::getDescription());
	}
	else if(problemNumber == 5){
		println!("{}", Problems::Problem5::getDescription());
	}
	else if(problemNumber == 6){
		println!("{}", Problems::Problem6::getDescription());
	}
	else if(problemNumber == 7){
		println!("{}", Problems::Problem7::getDescription());
	}
	else if(problemNumber == 8){
		println!("{}", Problems::Problem8::getDescription());
	}
	else if(problemNumber == 9){
		println!("{}", Problems::Problem9::getDescription());
	}
	else if(problemNumber == 10){
		println!("{}", Problems::Problem10::getDescription());
	}
	else if(problemNumber == 11){
		println!("{}", Problems::Problem11::getDescription());
	}
	else if(problemNumber == 12){
		println!("{}", Problems::Problem12::getDescription());
	}
	else if(problemNumber == 13){
		println!("{}", Problems::Problem13::getDescription());
	}
	else if(problemNumber == 14){
		println!("{}", Problems::Problem14::getDescription());
	}
	else if(problemNumber == 15){
		println!("{}", Problems::Problem15::getDescription());
	}
	else if(problemNumber == 16){
		println!("{}", Problems::Problem16::getDescription());
	}
	else if(problemNumber == 17){
		println!("{}", Problems::Problem17::getDescription());
	}
}
fn getProblemNumber() -> u32{
	println!("Enter a problem number: ");
	//Setup reading from the console
	let mut problemNumberStr = String::new();
	std::io::stdin().read_line(&mut problemNumberStr).ok();
	//Convert the read to an int
	let mut problemNumber = problemNumberStr.trim().parse::<u32>().unwrap();

	//Loop through all valid problem numbers and see if the one entered matches it
	while(!problemNumbers.contains(&problemNumber)){
		println!("That is an invalid problem number!\nEnter a problem number: ");
		std::io::stdin().read_line(&mut problemNumberStr).ok();
		problemNumber = problemNumberStr.trim().parse::<u32>().unwrap();
	}
	return problemNumber;
}
fn listProblems(){
	print!("Problems: {}", problemNumbers[1]);
	for problemNumber in 2..problemNumbers.len(){
		println!(", {}", problemNumbers[problemNumber])
	}
	println!();
}