/*  This code is based on Apple's "GeekGameBoard" sample code, version 1.0.

    http://developer.apple.com/samplecode/GeekGameBoard/

    Copyright © 2007 Apple Inc. Copyright © 2008 Jens Alfke. All Rights Reserved.

    Redistribution and use in source and binary forms, with or without modification, are permitted

    provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of conditions

      and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright notice, this list of

      conditions and the following disclaimer in the documentation and/or other materials provided

      with the distribution.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR

    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 

    FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-

    BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 

    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 

    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 

    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#import "HexchequerGame.h"

#import "HexGrid.h"

#import "Piece.h"

#import "QuartzUtils.h"

#import "GGBUtils.h"

@implementation HexchequerGame

- (void) setUpBoard

{

    // Create a hex grid and rotate it 30 degrees so the cells are edge-up:

    CGRect tableBounds = _table.bounds;

    CGFloat s = tableBounds.size.height / 9;

    HexGrid *board = [[HexGrid alloc] initWithRows: 9 columns: 9

                                           spacing: CGSizeMake(s,s)

                                          position: GetCGRectCenter(tableBounds)];

    board.anchorPoint = CGPointMake(0.47,0.5);  // Missing half-cells on right edge perturb center pt

    board.transform = CATransform3DMakeRotation(M_PI/6, 0,0,1);

    board.bitTransform = CATransform3DMakeRotation(-M_PI/6, 0,0,1);    // counteract board rotation

    _board = board;

    [_table addSublayer: _board];

    board.allowsMoves = YES;

    board.allowsCaptures = NO;      // no land-on captures, that is

    board.cellColor = CreateGray(1.0, 0.25);

    board.lineColor = kTranslucentLightGrayColor;

    board.reversed = ! [[self.players objectAtIndex: 0] isLocal];

    [board addCellsInHexagon];

}

- (NSString*) initialStateString

{

      return @"1111-1111--1111---1111-----------------2222---2222--2222-2222";

}

- (BOOL) canBit: (Bit*)bit moveFrom: (id<BitHolder>)srcHolder to: (id<BitHolder>)dstHolder

{

    Hex *src=(Hex*)srcHolder, *dst=(Hex*)dstHolder;

    if( [bit valueForKey: @"King"] )

        if( dst==src.bl || dst==src.br || dst==src.l

           || (src.bl.bit.unfriendly && dst==src.bl.bl) || (src.br.bit.unfriendly && dst==src.br.br)

           || (src.l.bit.unfriendly  && dst==src.l.l) )

            return YES;    

    return dst==src.fl || dst==src.fr || dst==src.r

            || (src.fl.bit.unfriendly && dst==src.fl.fl) 

            || (src.fr.bit.unfriendly && dst==src.fr.fr) 

            || (src. r.bit.unfriendly && dst==src. r. r);

}

- (void) bit: (Bit*)bit movedFrom: (id<BitHolder>)srcHolder to: (id<BitHolder>)dstHolder

{

    Hex *src=(Hex*)srcHolder, *dst=(Hex*)dstHolder;

    Turn *turn = self.currentTurn;

    if( turn.move.length==0 )

        [turn addToMove: src.name];

    [turn addToMove: @"-"];

    [turn addToMove: dst.name];

    BOOL isKing = ([bit valueForKey: @"King"] != nil);    

    PlaySound(isKing ?@"Funk" :@"Tink");

    // "King" a piece that made it to the last row:

    if( dst.fr == nil )

        if( ! isKing ) {

            PlaySound(@"Blow");

            bit.scale = 1.4;

            [bit setValue: @"King" forKey: @"King"];

            // don't set isKing flag - piece can't capture again after being kinged.

        }

    // Check for a capture:

    Hex *capture = nil;

    if(dst==src.fl.fl)

        capture = src.fl;

    else if(dst==src.fr.fr)

        capture = src.fr;

    else if(dst==src.bl.bl)

        capture = src.bl;

    else if(dst==src.br.br)

        capture = src.br;

    else if(dst==src.l.l)

        capture = src.l;

    else if(dst==src.r.r)

        capture = src.r;

    if( capture ) {

        PlaySound(@"Pop");

        [turn addToMove: @"!"];

        [capture destroyBit];

        // Now check if another capture is possible. If so, don't end the turn:

        if( (dst.fl.bit.unfriendly && dst.fl.fl.empty) 

                || (dst.fr.bit.unfriendly && dst.fr.fr.empty) 

                || (dst. r.bit.unfriendly && dst. r. r.empty) )

            return;

        if( isKing )

            if( (dst.bl.bit.unfriendly && dst.bl.bl.empty)

                    || (dst.br.bit.unfriendly && dst.br.br.empty)

                    || (dst.l.bit.unfriendly && dst.l.l.empty) )

                return;

    }

    [self endTurn];

}

- (BOOL) canOpponentMoveFrom: (GridCell*)src

{

    if( ! src.bit.unfriendly )

        return NO;

    if( [super canOpponentMoveFrom: src] )

        return YES;

    Hex *hex = (Hex*)src;

    if( hex.bit.tag )           // remember, it's opponent's piece, so directions are reversed

        if( hex.r.empty || (hex.r.bit.friendly && hex.r.r.empty) )

            return YES;

    return hex.l.empty || (hex.l.bit.friendly && hex.l.l.empty);

}

@end