/* 
	A variation of the game 'Mastermind'.
	This game allows two modes of play - 
	vs a computer and vs a friend (another
	player). The game is designed with the
	basics of the mastermind game function,
	where a hidden sequence is given and it
	is the opponent's job to find the sequence
	given clues from feedback as fast as possible.
	Instead of coloured pins, this game uses
	a sequence of numbers in the theme of
	cracking a safe.
*/

// Libraries and defines and global variables

#include <iostream>
#include <string>
#include <stdlib.h> // library with the function rand
#include <time.h> // library with time in
#include <windows.h> // library with clear screen in
#include <sstream> // library with string streams to save strings to file
#include <fstream>
#define MAXNUM 10 // Constant for making a random value between 0 and 9

using namespace std;

int iChoice; // Global choice for menu
string sFirst = "None"; // Global name for first place
string sSecond = "None"; // Global name for second place
string sThird = "None"; // Global name for third place
int iFirstScore = 11; // Score of first place
int iSecondScore = 11; // Score of second place
int iThirdScore = 11; // Score of third place
char cSequence[6]; // Variable to store player's code
char cGuess[6]; // Variable to store player's guess
char cCode[6]; // Variable to store inputs of codes

void load(); // Get variables from file (program start)
void save(); // Save varaibles to file (program end)
int menu(); // Prototype to create menu
int computer(); // Prototype to play computer
int player(); // Prototype to play another player
int hiscore(); // Prototype to show hi-score
int gameengine(); // Prototype to perform main guessing function
void codeentry(); // Prototype to enter a 5 digit code

int main()
{	
    load(); // Gets the variables stored in "hi-score.bat"
    
	cout << "Welcome to SafeCracker. Please choose an option from the menu.\n\n";
	
	menu(); // Ask user what they want to do.
    
	while ( iChoice != 4 ) // While user doesn't want to quit.
	{
		if ( iChoice == 1 ) // User chose to play vs computer.
			computer(); // Run function to play computer.
			
		if ( iChoice == 2 ) // User chose to play vs another player.
			player(); // Run function to play another player.
            		
		if ( iChoice == 3 ) // User chose to view hi-scores
			hiscore(); // Run function to show hi-score
			
		system("cls"); // Clear the screen
		menu(); // Ask what the user want's to do now.
		
 	}
 	save(); // Saves the varaibles to "hi-score.bat"
	return 0; // End program (User typed "Quit")
}

void load() {
		// Set up the data storage variables
        string data;
        ostringstream temp;

        ifstream fh ("scores.dat"); // Open the file

		// Check if the file opened successfully
        if (fh.is_open()) 
        {
				// Read through the file and store the data in the temporary variable
                while (!fh.eof()) 
                        getline(fh, data);
                fh.close();
        }
        else
                cout << "Couldn't open file: scores.dat" << endl; // Display error if file can't be opened
        int del = 1;
        int type = 0;

		// Iterate through each byte in the file
        for (int i=0; i<data.size(); i++) 
        {
				// Catch the seperator (TAB in this case)
                if (int(data[i]) == 9) 
                {
						// First place
                        if (del == 1) 
						{
								// Name
                                if (type == 0) 
								{
										if (temp.str().size() > 0) { sFirst = temp.str(); }
                                        type = 1;
                                }
								// Score
                                else 
								{
                                        iFirstScore = atoi(temp.str().c_str());
                                        type = 0;
                                        del++;
                                }
                        }
                        else if (del == 2) 
						{
                                if (type == 0) 
								{
										if (temp.str().size() > 0) { sSecond = temp.str(); }
                                        type = 1;
                                }
                                else 
								{
                                        iSecondScore = atoi(temp.str().c_str());
                                        type = 0;
                                        del++;
                                }
                        }
                        else if (del == 3) 
						{
                                if (type == 0) 
								{
										if (temp.str().size() > 0) { sThird = temp.str(); }
                                        type = 1;
                                }
                                else 
								{
                                        iThirdScore = atoi(temp.str().c_str());
                                        type = 0;
                                        del++;
                                }
                        }

                        temp.str(""); // Erase the temp data
                }
                else
                        temp << data[i]; // Store byte into the temp variable
        }
} 

void save() {
		// Generate the data string
        ostringstream str;
        str << sFirst << char(9) << iFirstScore << char(9) << sSecond << char(9) << iSecondScore << char(9) << sThird << char(9) << iThirdScore;

        ofstream fh ("scores.dat"); // Open the file

		// Check if the file opened successfully
        if (fh.is_open()) 
		{
				// Write to the file
                fh << str.str();
                fh.close();
        }

        else 
			cout << "Couldn't open file: scores.dat" << endl; // Display error if file can't be opened
}

int menu() // Function to ask user what they would like to do
{ 
    cout << "Menu:\n\n\t 1 - Vs. Computer\n\t 2 - Vs, Player\n\t 3 - Hi-Scores\n\t 4 - Quit\n\nChoice: ";
    cin >> iChoice; // User enter's choice,
    while ( ( iChoice < 1 ) || ( iChoice > 4 ) ) // If choice is invalid ask again
    {
          cout << iChoice << " is an invalid choice. Choose between option 1 and option 4.\n\nChoice: ";
          cin >> iChoice;
    }
    return 0;
}

int computer() // Function to play the computer
{
    srand ( (int) time( NULL )); // Seed the random number generator
	for (int i=0; i<5; i++) 
		cSequence[i] = ( rand() % MAXNUM ) + '0'; // Set 5 digits to the sequence (0-9)
	cSequence[5] = '\0';
    gameengine(); // Run game engine function for user to guess the sequence. 
	
	return 0;
}

int player() // Function to play another player
{
	// Player 1
	cout << "Player 2: Enter a 5-number sequence between 00000 and 99999. (The entry will be masked.)\n\n Sequence: ";
    codeentry(); // Function to create the sequence
	for (int i=0; i<6; i++) 
		cSequence[i] = cCode[i]; // Assign sequence to variable
    gameengine(); // Run game engine function for user to guess the sequence. 

	// Player 2
	cout << "Player 1: Enter a 5-number sequence between 00000 and 99999. (This entry will be masked.)\n\n Sequence: ";
	codeentry(); // Function to create the sequence
    for (int i=0; i<6; i++) 
		cSequence[i] = cCode[i]; // Assign sequence to variable
	gameengine(); // Run game enginge function for user to guess the sequence

	return 0;
}

int gameengine() // Function for main engine
{
    system("cls"); // Clear the screen
    cout << "Armed with your 'Click Listener' and luck, attempt to crack the safe!";
    char cGuessRight='n'; // Set the user's current status to "not guessed correctly."
    int x=0; // Loop variable
	int i=0; // Loop variable
	int iCorrect; // Value to store whether guess is the same as sequence
    while ( ( x<10 ) && ( cGuessRight != 'y' ) )
    {
          x++; // Increase attempt number
          cout << "\n\nCrack The Safe: ";
          codeentry(); // Function to create the sequence
		  for (i=0; i<6; i++) 
			  cGuess[i] = cCode[i]; // Assign sequence to variable
		  iCorrect=0; // Reset value of iCorrect
          for (i=0; i<5; i++ ) // While loop to decide whether or not the user got it right
		  {
				if ( cGuess[i] == cSequence[i] ) // If a guess is the same as the sequence add one to iCorrect
					iCorrect++;
		  }
		  if ( iCorrect == 5 )
		  {
			  cGuessRight = 'y';
			  cout << "\nCongratulations! You found to secret code. You finished it in " << x << " guesses.\n\n";
		  }
		  else
			  cout << "\nYour 'Click Listener' seems to have activated " << iCorrect << " times with that guess.\n\n";
    }
	if ( cGuessRight=='n' ) // Player failed
		cout << "\n\nYou have failed to find the code in time and have been caught by the guards. Better luck next time.\n\n";
	else // If player guess correctly, check to see if they qualify for the leader board.
	{
		if ( i < iFirstScore ) // First place
		{
			cout << "Your speed in cracking the code makes you 1st in the leader board!\nEnter initials: ";
			cin >> sFirst;
			iFirstScore = i;
			hiscore(); // Display hiscore
		}
		else if ( i < iSecondScore ) // Second place
		{
			cout << "Your speed in cracking the code makes you 2nd in the leader board!\nEnter initials: ";
			cin >> sSecond;
			iSecondScore = i;
			hiscore(); // Display hiscore
		}
		else if ( i < iThirdScore ) // Third place
		{
			cout << "Your speed in cracking the code makes you 3rd in the leader board! \nEnter initials: ";
			cin >> sThird;
			iThirdScore = i;
			hiscore(); // Display hiscore
		}
	}
	return 0;
}

void codeentry()
{
	int trigger=1;
	do
	{
		trigger=1;
		cin >> cCode; // Enter code
		for (int i=0; i<5; i++) 
		{ 
			if ( ( ( cCode[i] < '0' || cCode[i] > '9' ) ) || ( cCode[5] != '\0' ) ) // Check each entry is a single digit
			{ 
				cout << "\nError with input, try again\n\n Input: ";
				trigger=0;
				break; // Force a break if not
			}
		}
	} while (trigger != 1); // Repeat until all entries are one digit
}

int hiscore() // Function to show hiscore
{
	system("cls"); // Clear the screen
	cout << "Position\t\tPlayer Name\t\tHi-Score\n" << endl;
	if ( iFirstScore < 11 )
	cout << "1.\t\t\t" << sFirst << "\t\t\t" << iFirstScore << endl;
	if ( iSecondScore < 11 )
	cout << "2.\t\t\t" << sSecond << "\t\t\t" << iSecondScore << endl;
	if ( iThirdScore < 11 )
	cout << "3.\t\t\t" << sThird << "\t\t\t" << iThirdScore << endl;

	char cDelete='n';
	cout << "\n\nDo you wish to reset hi-scores?\n\n Reset? (y/n) ";
	cin >> cDelete;

	if ( cDelete == 'y' )
	{
		iFirstScore = iSecondScore = iThirdScore = 11;
		sFirst = sSecond = sThird = "None";
		cout << "\nScores deleted.";
		getchar();
	}

	return 0;
 }