//*****Penny Game.
//*****By Luke Hill
//*****22/10/2010




#include <iostream>
#include <time.h>

using namespace std;

void displayScores(int playerScores,int computerScores)
{
    cout << "The scores\n" << endl;
    cout << "Player has won: " << playerScores << " games." << endl;
    cout << "Computer has won: " << computerScores << " games." << endl;
}

void main()
{

    int pennies = 21; // Stores how many pennies the game starts at. Increase/decrease number for desired starting pennies.
    int penniesRemaining = pennies;
    int numberOfGamesToPlay = 5; // Stores how many games are to be played against the computer. Increase/decrease for desired length.
    int numberOfGamesPlayed = 0; // Stores how many games have currently been played. Literal is initialised as 0 as no games have been played.
    int gamesComputerHasWon = 0; // Stores the amount of times the computer has beaten the player. Literal is initialised as 0 as no games have been played.
    int gamesPlayerHasWon = 0; // Stores the amount of times the player has beaten the computer. Literal is initialised as 0 as no games have been played.
    int penniesToDisplay = 0; // A variable that helps check how many 'O's to display to the user in correlation to remaining 'pennies'.
    int computersMove = 0;
    int playersMove = 0;
    bool computerTakesFirstTurn = true; // Decides whether computer takes the first turn. 'true' to go first 'false' to go second.
    bool computersTurn;
    bool gameInProgress;

    srand(time(0));

    cout << "Welcome to the Penny game. The rules are simple. There are " << pennies << " pennies in a pile. Taking turns you and the computer must take away between 1-5 pennies. The personwho takes the last penny loses.\n" << endl;
    system("pause");
    while (numberOfGamesPlayed < numberOfGamesToPlay)
    {
        cout << "\nLet's start! Game " << numberOfGamesPlayed +1 << " out of " << numberOfGamesToPlay << endl;
        if (computerTakesFirstTurn)
        {
            cout << "\nComputer goes first!" << endl;
            computersTurn = true;
        }
        else
        {
            cout << "Player to go first" << endl;
            computersTurn = false;
        }
        gameInProgress = true;

        while (gameInProgress)
        {
            if (computersTurn)
            {
                if (penniesRemaining == 1)
                {
                    cout << "The computer takes away the final coin.\n" << endl;
                    cout << "Congratulations player, you win game " << numberOfGamesPlayed +1 << endl;
                    numberOfGamesPlayed++;
                    gamesPlayerHasWon++;
                    displayScores(gamesPlayerHasWon,gamesComputerHasWon);
                    penniesRemaining = pennies;
                    gameInProgress = false;
                    system("pause");
                }
                else if ((penniesRemaining < 7) && (penniesRemaining >1))
                {
                    computersMove = penniesRemaining - 1;
                    cout << "Oh dear, it looks like you're about to lose! The computer takes away " << computersMove << " pennies. Leaving you to take the very last coin." << endl;
                    penniesRemaining = penniesRemaining - computersMove;
                    cout << "Pennies remaining: (1) O" << endl;
                    computersTurn = false;
                }
                else
                {
                    computersMove = (rand()%5+1);
                    cout << "The computer decides to take away " << computersMove << " pennies." << endl;
                    penniesRemaining = penniesRemaining - computersMove;
                    cout << "Pennies remaining: (" << penniesRemaining << ")\n ";
                    while (penniesToDisplay < penniesRemaining)
                    {
                        cout << "O";
                        penniesToDisplay++;
                    }
                    penniesToDisplay = 0;
                    computersTurn = false;
                }
            }
            else
            {
                cout << "Your move, player." << endl;
                if (penniesRemaining == 1)
                {
                    while ( playersMove != 1)
                    {
                        cout << "Oh dear, player. You're left with the last penny to take. Take away the final coin: ";
                        cin >> playersMove;
                    }
                    cout << "Unfortunately player, you lose game " << numberOfGamesPlayed +1 << endl;
                    numberOfGamesPlayed++;
                    gamesComputerHasWon++;
                    displayScores(gamesPlayerHasWon,gamesComputerHasWon);
                    penniesRemaining = pennies;
                    gameInProgress = false;
                    computersTurn = true;
                    system("pause");
                }
                while ((playersMove > 5) || (playersMove < 1))
                {
                    cout << "How many pennies will you remove from the pile?: ";
                    cin >> playersMove;
                }
                penniesRemaining = penniesRemaining - playersMove;
                if (penniesRemaining <=0)
                {
                    cout << "Oh dear, you've taken the last coin! You lose!" << endl;
                    numberOfGamesPlayed++;
                    gamesComputerHasWon++;
                    displayScores(gamesPlayerHasWon,gamesComputerHasWon);
                    penniesRemaining = pennies;
                    gameInProgress = false;
                    computersTurn = true;
                    system("pause");
                }
                else
                {
                    cout << "Pennies remaining: (" << penniesRemaining << ") ";
                    while (penniesToDisplay < penniesRemaining)
                    {
                        cout << "O";
                        penniesToDisplay++;
                    }
                    cout << "\n" << endl;
                    penniesToDisplay = 0;
                    playersMove = 0;
                    computersTurn = true;
                    system("pause");
                }
            }
        }
    }
    cout << "All the games have been played. Let's check the final scores!" << endl;
    if (gamesComputerHasWon > gamesPlayerHasWon)
    {
        cout << "The computer has won " << gamesComputerHasWon << " whereas the player has only won " << gamesPlayerHasWon << ". It looks like the computer wins!" << endl;
    }
    else
    {
        cout << "The player has won " << gamesPlayerHasWon << " whereas the computer has only won " << gamesComputerHasWon << ". It looks like the player wins!" << endl;
    }
    cout << "Thanks for playing. Please play again soon!" << endl;
    system("pause");
}