/*

File: TicTacToeGame.m

Abstract: The game of Tic-Tac-Toe.

Version: 1.0

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*/

#import "TicTacToeGame.h"

#import "Grid.h"

#import "Dispenser.h"

#import "Piece.h"

#import "QuartzUtils.h"

/**  WARNING: THIS CODE REQUIRES GARBAGE COLLECTION!

 **  This sample application uses Objective-C 2.0 garbage collection.

 **  Therefore, the source code in this file does NOT perform manual object memory management.

 **  If you reuse any of this code in a process that isn't garbage collected, you will need to

 **  add all necessary retain/release/autorelease calls, and implement -dealloc methods,

 **  otherwise unpleasant leakage will occur!

 **/

@implementation TicTacToeGame

- (void) x_createDispenser: (NSString*)imageName forPlayer: (int)playerNumber x: (int)x

{

    Piece *p = [[Piece alloc] initWithImageNamed: imageName scale: 80];

    p.owner = [self.players objectAtIndex: playerNumber];

    _dispenser[playerNumber] = [[Dispenser alloc] initWithPrototype: p quantity: 0

                                                        frame: CGRectMake(x,16, 120,120)];

    [_board addSublayer: _dispenser[playerNumber]];

}

- (id) initWithBoard: (CALayer*)board

{

    self = [super initWithBoard: board];

    if (self != nil) {

        [self setNumberOfPlayers: 2];

        // Create a 3x3 grid:

        CGFloat center = floor(CGRectGetMidX(board.bounds));

        _grid = [[RectGrid alloc] initWithRows: 3 columns: 3 frame: CGRectMake(center-150,16, 300,300)];

        [_grid addAllCells];

        _grid.allowsMoves = _grid.allowsCaptures = NO;

        _grid.cellColor = CGColorCreateGenericGray(1.0, 0.25);

        _grid.lineColor = kTranslucentLightGrayColor;

        [board addSublayer: _grid];

        // Create piece dispensers for the two players:

        [self x_createDispenser: @"/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarUtilitiesFolderIcon.icns"

                     forPlayer: 0 x: center-290];

        [self x_createDispenser: @"/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarAdvanced.icns"

                     forPlayer: 1 x: center+170];

        // And they're off!

        [self nextPlayer];

    }

    return self;

}

- (void) nextPlayer

{

    [super nextPlayer];

    // Give the next player another piece to put down:

    _dispenser[self.currentPlayer.index].quantity = 1;

}

static Player* ownerAt( Grid *grid, int index )

{

    return [grid cellAtRow: index/3 column: index%3].bit.owner;

}

/** Should return the winning player, if the current position is a win. */

- (Player*) checkForWinner

{

    static const int kWinningTriples[8][3] =  { {0,1,2}, {3,4,5}, {6,7,8},  // rows

                                                {0,3,6}, {1,4,7}, {2,5,8},  // cols

                                                {0,4,8}, {2,4,6} };         // diagonals

    for( int i=0; i<8; i++ ) {

        const int *triple = kWinningTriples[i];

        Player *p = ownerAt(_grid,triple[0]);

        if( p && p == ownerAt(_grid,triple[1]) && p == ownerAt(_grid,triple[2]) )

            return p;

    }

    return nil;

}

@end