//
// Program Deck.cpp
//
// Purpose: demonstrate use of programmer-defined data types, 
//			including enum, struct, and array of structs
//
// Date: 4/10/00
//
// Programmer: Pamela J. Vermeer
//


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

const DECKSIZE = 52;

// Data types
enum Value {TWO = 2, THREE, FOUR, FIVE, SIX, SEVEN,
			EIGHT, NINE, TEN, JACK, QUEEN, KING, ACE};
enum Suit {SPADES, CLUBS, DIAMONDS, HEARTS};

struct Card {
	Value myValue;	
	Suit mySuit;
};

// Functions in file
int CompareCards(Card card1, Card card2);
void PrintValue(Card card);
void PrintSuit(Card card);
void PrintCard(Card card);

void InitializeStandardDeck(Card deck[]);
void ShuffleDeck(Card deck[], int size);
void PrintDeck(Card deck[], int size);

void main()
{
	Card deck[DECKSIZE];

	// Initialize the random number generator
	srand(time(NULL));

	InitializeStandardDeck(deck);
	cout << "Before shuffling: " << endl;
	PrintDeck(deck, DECKSIZE);
	cout << endl << endl;

	
	ShuffleDeck(deck, DECKSIZE);
	cout << "After shuffling:" << endl;
	PrintDeck(deck, DECKSIZE);

}

//
//	void InitializeStandardDeck(Card deck[])
//
//	Purpose: fills in the deck array with standard playing cards in standard order
//
//	Parameters: the deck to fill in
//
void InitializeStandardDeck(Card deck[])
{

	for (int i = 0; i < 4; i++) 
		for (int j = 2; j <= 14; j++)
		{
			deck[i*13 + (j - 2)].myValue = Value(j);
			deck[i*13 + (j - 2)].mySuit = Suit(i);
		}

}

//
//	void ShuffleDeck(Card deck[])
//
//	Purpose: randomly reorders a deck of cards
//
//	Parameters: the deck to shuffle
//
//  Comment: assumes constant DECKSIZE is declared
//
void ShuffleDeck(Card deck[], int size)
{
	int choice;
	Card temp;
	for (int i = 0; i < size; i++){
		choice = i + rand()%(size - i);
		temp = deck[i];
		deck[i] = deck[choice];
		deck[choice] = temp;

	}
}

//
//  int CompareCards(Card card1, Card card2)
//
//  Purpose: compare two cards and decide whether they are equal (return 0)
//			 or the first before the second (return -1)
//			 or the second before the first (return 1)
//
//			 The standard order for the cards is Spades first, then Clubs,
//			 then Diamonds, then Hearts.  Within each suit, the order is
//			 Two - Ace.  So a Two of Diamonds would be "greater than" a King of Clubs
//
//	Parameters: Card card1, card2 -- the cards to compare

int CompareCards(Card card1, Card card2)
{
	if (card1.mySuit == card2.mySuit)
		if (card1.myValue == card2.myValue)
			return 0;
		else if (card1.myValue < card2.myValue)
			return -1;
		else
			return 1;
	else if (card1.mySuit < card2.mySuit)
		return -1;
	else
		return 1;
}

//
// void PrintValue(Value cardValue)
//
// Purpose: output variable of type Value to the screen
//
// Parameter: cardValue -- the variable to output
//
void PrintValue(Value cardValue)
{
	if ( TWO <= cardValue && cardValue <= TEN)
		cout << int(cardValue);
	else
		switch(cardValue) {
		case JACK: cout << "Jack" ;
				  break;
		case QUEEN: cout << "Queen" ;
				  break;
		case KING: cout << "King" ;
				  break;
		case ACE: cout << "Ace" ;
				  break;
		}
}

//
// void PrintSuit(Suit cardSuit)
//
// Purpose: output variable of type Suit to the screen
//
// Parameter: cardValue -- the variable to output
//
void PrintSuit(Suit cardSuit)
{
	switch(cardSuit) {
	case HEARTS: cout << "Hearts";
				 break;
	case DIAMONDS: cout << "Diamonds";
				 break;
	case CLUBS: cout << "Clubs";
				 break;
	case SPADES: cout << "Spades";
				 break;
	}

}

//
// void PrintCard(Card inCard)
//
// Purpose: output variable of type Card to the screen
//
// Parameter: inCard -- the variable to output
//
void PrintCard(Card card)
{

	PrintValue(card.myValue);
	cout << " of " ;
	PrintSuit(card.mySuit);

}

//
// void void PrintDeck(Card deck[])
//
// Purpose: output variable of type Deck to the screen,
//		one card per line
//
// Parameter: deck -- the variable to output
//
// Comment: Pauses after printing 20 cards and waits for input,  
//		because our output screen does not scroll
// 
void PrintDeck(Card deck[], int size)
{
	char ch; // used for input to print out more output


	for (int i = 0; i < size; i++) {
		PrintCard(deck[i]);
		cout << endl;

		// Pause after printing 20 cards
		if ((i+1) % 20 == 0) {
			cout << "Enter any character to continue ";
			cin >> ch;
		}

	}
}