#include <iostream>
#include <string>
#include <stdlib.h>
#include <fstream>
#include <time.h>
#include <vector>

using namespace std;

int main()
{
	menu:
	system("cls");

	string choice;
	string username;
	string passLength;
	string lowercases = "abcdefghijklmnopqrstuvqxyz";
	string uppercases = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	string numbers = "1234567890";
	string symbols = "`~!@#$%^&*()_+-={[}]|\:'<,>.?/";
	string password;
	string sym;
	string num;
	string upper;
	string lower;
	string choices[4];
	string exit;
	string word;
	string strx;
	bool playingGame = true;
	int inty;
	int intx;
	int number;
	bool upperCase = false;
	bool lowerCase = false;
	bool IsSymbols = false;
	bool IsNumbers = false;
	bool requiredLength = true;
	bool userLength = true;
	bool length = true;
	bool isLetter = false;
	bool response1 = true;
	bool response2 = true;
	bool response3 = true;
	bool response4 = true;
	bool palindromeIdentifier = true;

	cout << "    Main Menu" << endl;
	cout << " ----------------" << endl;
	cout << endl;
	cout << "Choose a program to run:" << endl;
	cout << endl;
	cout << "1. Password Generator" << endl;
	cout << "2. Palindrome Identifier" << endl;
	cout << "3. FizzBuzz" << endl;
	cout << endl;
	cout << "4. Exit" << endl;
	cout << endl;
	getline(cin, choice);
	if (choice == "1")
	{
		system("cls");
			srand(time(NULL));
			while (userLength)
			{
				cout << "Enter a username:" << endl;
				getline(cin, username);
				if (username.length() >= 1)
				{
					userLength = false;
					cout << endl;
				}
				else
				{
					cout << "You must enter at least 1 character" << endl;
					cout << endl;
				}
			}

			while (requiredLength)
			{
				cout << "Enter a length for your password (At least 15 characters recommended):" << endl;
				getline(cin, passLength);
				cout << endl;
				try
				{
					intx = stoi(passLength);
				}
				catch (invalid_argument)
				{
					intx = 0;
				}
				if (intx <= 5 || intx >= 129)
				{
					cout << "You must enter number between between 6 and 128." << endl;
					cout << endl;
				}
				else
				{
					requiredLength = false;
				}
			}

			while (response1)
			{
				cout << "Include uppercase characters?: (yes/no)" << endl;
				getline(cin, upper);
				if (upper == "yes" || upper == "Yes" || upper == "y")
				{
					upperCase = true;
					response1 = false;
				}
				else if (upper == "no" || upper == "No" || upper == "n")
				{
					uppercases.clear();
					response1 = false;
				}
				else
				{
					cout << endl;
					cout << "Please type yes or no." << endl;
				}
				cout << endl;
			}

			while (response2)
			{
				cout << "Include lowercase characters?: (yes/no)" << endl;
				getline(cin, lower);
				if (lower == "yes" || lower == "Yes" || lower == "y")
				{
					lowerCase = true;
					response2 = false;
				}
				else if (lower == "no" || lower == "No" || lower == "n")
				{
					lowercases.clear();
					response2 = false;
				}
				else
				{
					cout << endl;
					cout << "Please type yes or no." << endl;
				}
				cout << endl;
			}

			while (response3)
			{
				cout << "Include numbers?: (yes/no)" << endl;
				getline(cin, num);
				if (num == "yes" || num == "Yes" || num == "y")
				{
					IsNumbers = true;
					response3 = false;
				}
				else if (num == "no" || num == "No" || num == "n")
				{
					numbers.clear();
					response3 = false;
				}
				else
				{
					cout << endl;
					cout << "Please type yes or no." << endl;
				}
				cout << endl;
			}

			while (response4)
			{
				cout << "Include symbols?: (yes/no)" << endl;
				getline(cin, sym);
				if (sym == "yes" || sym == "Yes" || sym == "y")
				{
					IsSymbols = true;
					response4 = false;
				}
				else if (sym == "no" || sym == "No" || sym == "n")
				{
					symbols.clear();
					response4 = false;
				}
				else
				{
					cout << endl;
					cout << "Please type yes or no." << endl;
				}
				cout << endl;
			}

			choices[0] = lowercases;
			choices[1] = uppercases;
			choices[2] = symbols;
			choices[3] = numbers;

			if (IsSymbols || IsNumbers || lowerCase || upperCase == true)
			{
				while (length)
				{
					if (password.length() == intx)
					{
						length = false;
						cout << "Your username is: " << username << endl;
						cout << "Your password is: " << password << endl;
						ofstream file;
						file.open("C:/Users/iD Student/Desktop/" + username + ".txt");
						file << "Username: " << username << endl;
						file << "Password: " << password << endl;
						file.close();
						cout << endl;
						cout << "Your login has been saved to the desktop as " << username << ".txt" << endl;
						cout << endl;
						cout << "Press enter to return to the menu." << endl;
						getline(cin, exit);
						system("cls");
						goto menu;
					}
					else
					{
						number = rand() % 4;
						if (choices[number].length() >= 1)
						{
							password += choices[number][rand() % choices[number].length()];
						}
						else
						{
							number = rand() % 4;
						}
					}
				}
			}
			else
			{
				cout << "You must pick at least one type of character to generate a password." << endl;
				cout << "Press enter to return to the menu." << endl;
				getline(cin, exit);
				system("cls");
				goto menu;
			}
		}
	else if (choice == "2")
	{
		system("cls");
		cout << "Insert a word:" << endl;
		getline(cin, word);

		while (palindromeIdentifier)
		{
			if (word.length() <= 1)
			{
				cout << "That is a palindrome." << endl;
				palindromeIdentifier = false;
				cout << "Press enter to return to the menu." << endl;
				cout << endl;
				getline(cin, exit);
				system("cls");
				goto menu;
			}

			else if (word[0] == word[word.length() - 1])
			{
				word.erase(word.begin());
				word.erase(word.end() - 1);
			}

			else
			{
				cout << "That is not a palindrome." << endl;
				palindromeIdentifier = false;
				cout << "Press enter to return to the menu." << endl;
				cout << endl;
				getline(cin, exit);
				system("cls");
				goto menu;
			}
			}
		}
	else if (choice == "3")
	{
		system("cls");
		while (playingGame)
		{
			cout << "Insert a number" << endl;
			getline(cin, strx);
			cout << endl;
			try
			{
				inty = stoi(strx);
			}
			catch (invalid_argument)
			{
				inty = 2;
			}

			if ((inty % 3 == 0) && (inty % 5 == 0))
			{
				cout << "FizzBuzz" << endl;
				cout << endl;
				cout << "Press enter to return to the menu." << endl;
				getline(cin, exit);
				system("cls");
				goto menu;
			}
			else if (inty % 3 == 0)
			{
				cout << "Buzz" << endl;
				cout << endl;
				cout << "Press enter to return to the menu." << endl;
				getline(cin, exit);
				system("cls");
				goto menu;
			}
			else if (inty % 5 == 0)
			{
				cout << "Fizz" << endl;
				cout << endl;
				cout << "Press enter to return to the menu." << endl;
				getline(cin, exit);
				system("cls");
				goto menu;
			}
			else
			{
				cout << "The number must be divisible by 3, 15, or both." << endl;
				cout << endl;
			}
		}
	}
	else if (choice == "4")
	{
		system("exit");
	}
	else
	{
		cout << "Please select a valid option." << endl;
		cout << "Press enter to restart" << endl;
		getline(cin, exit);
		goto menu;
	}
}