#include <assert.h>
#include "card.h"
#include "deck.h"
#include <stdlib.h>

void Deck::init()
{
	int suitSize = DECK_SIZE / (spade - club + 1);
	
	for (int suitLoop = club; suitLoop <= spade; ++suitLoop)
	{
		for (int rankLoop = 0; rankLoop < suitSize; ++rankLoop)
		{
			_deck[suitLoop * suitSize + rankLoop].setSuit(suitLoop + 1);	// remember, 0 = BLANK
			_deck[suitLoop * suitSize + rankLoop].setRank(rankLoop + 2);    // lowest rank is 2, not 0
		}
	}
}



void Deck::shuffle()
{
	assert (DECK_SIZE > 1);
	for (int curCard = 1; curCard < DECK_SIZE; ++curCard)
	{
		// pick a card to swap with curCard 
		unsigned swapCard = rand() % (curCard + 1);

		int saveRank = _deck[swapCard].getRank();
		int saveSuit = _deck[swapCard].getSuit();

		// 'move' curCard to swapCard position
		_deck[swapCard].setRank( _deck[curCard].getRank() );
		_deck[swapCard].setSuit( _deck[curCard].getSuit() );

		// 'move' curCard to swapCard position
		_deck[curCard].setRank(saveRank);
		_deck[curCard].setSuit(saveSuit);
	}
}