/*

File: DCGame.m

Abstract: Dice Game Implementation

Version: 1.0

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*/ 

#import "DCGame.h"

#import "DCDiceView.h"

#define NUMBER_OF_TURNS 13

#define UPPER_SECTION_BONUS_GOAL 63

#define UPPER_SECTION_BONUS_VALUE 35

NSString * const DCGameCategoryName = @"DCGameCategoryName";

NSString * const DCGameCategoryScore = @"DCGameCategoryScore";

NSString * const DCOnesScoreKey = @"DCOnesScoreKey";

NSString * const DCTwosScoreKey = @"DCTwosScoreKey";

NSString * const DCThreesScoreKey = @"DCThreesScoreKey";

NSString * const DCFoursScoreKey = @"DCFoursScoreKey";

NSString * const DCFivesScoreKey = @"DCFivesScoreKey";

NSString * const DCSixesScoreKey = @"DCSixesScoreKey";

NSString * const DCUpperSubtotalKey = @"DCUpperSubtotalKey";

NSString * const DCBonusKey = @"DCBonusKey";

NSString * const DCUpperTotalKey = @"DCUpperTotalKey";

NSString * const DCThreeOfAKindScoreKey = @"DCThreeOfAKindScoreKey";

NSString * const DCFourOfAKindScoreKey = @"DCFourOfAKindScoreKey";

NSString * const DCFullHouseScoreKey = @"DCFullHouseScoreKey";

NSString * const DCSmallStraightScoreKey = @"DCSmallStraightScoreKey";

NSString * const DCLargeStraightScoreKey = @"DCLargeStraightScoreKey";

NSString * const DCChanceScoreKey = @"DCChanceScoreKey";

NSString * const DCFiveOfAKindScoreKey = @"DCFiveOfAKindScoreKey";

NSString * const DCLowerSubtotalKey = @"DCLowerSubtotalKey";

NSString * const DCFiveOfAKindBonusKey = @"DCFiveOfAKindBonusKey";

NSString * const DCGrandTotalKey = @"DCGrandTotalKey";

@implementation DCGame

+(NSSet *)keyPathsForValuesAffectingValueForKey:(NSString *)key {

    NSSet* set = [super keyPathsForValuesAffectingValueForKey:key];

    if ([key isEqualToString:@"canRoll"]) {

        set = [set setByAddingObjectsFromSet:[NSSet setWithObjects:@"numberOfRollsRemaining", @"numberOfTurnsRemaining", nil]];

    } else if ([key isEqualToString:@"canScore"]) {

        set = [set setByAddingObject:@"numberOfTurnsRemaining"];

    } else if ([key isEqualToString:@"isGameOver"]) {

        set = [set setByAddingObject:@"numberOfTurnsRemaining"];

    }

    return set;

}

/* Method to convert the enum value used as a tag to the corresponding string constant */

-(NSString *)scoreKeyForScoreCategoryTag:(DCScoreCategoryTag)categoryTag {

    NSString *scoreCategoryKey = nil;

    switch(categoryTag) {

        case DCOnesScoreTag:

            scoreCategoryKey = DCOnesScoreKey;

            break;

        case DCTwosScoreTag:

            scoreCategoryKey = DCTwosScoreKey;

            break;

        case DCThreesScoreTag:

            scoreCategoryKey = DCThreesScoreKey;

            break;

        case DCFoursScoreTag:

            scoreCategoryKey = DCFoursScoreKey;

            break;

        case DCFivesScoreTag:

            scoreCategoryKey = DCFivesScoreKey;

            break;

        case DCSixesScoreTag:

            scoreCategoryKey = DCSixesScoreKey;

            break;

        case DCThreeOfAKindScoreTag:

            scoreCategoryKey = DCThreeOfAKindScoreKey;

            break;

        case DCFourOfAKindScoreTag:

            scoreCategoryKey = DCFourOfAKindScoreKey;

            break;

        case DCFullHouseScoreTag:

            scoreCategoryKey = DCFullHouseScoreKey;

            break;

        case DCSmallStraightScoreTag:

            scoreCategoryKey = DCSmallStraightScoreKey;

            break;

        case DCLargeStraightScoreTag:

            scoreCategoryKey = DCLargeStraightScoreKey;

            break;

        case DCChanceScoreTag:

            scoreCategoryKey = DCChanceScoreKey;

            break;

        case DCFiveOfAKindScoreTag:

            scoreCategoryKey = DCFiveOfAKindScoreKey;

            break;

        default:

            NSLog(@"Unknown Score Category Tag");

            break;

    }

    return scoreCategoryKey;

}

-(NSDictionary *)rollValues {

    if (![diceValues count]) return [NSMutableDictionary dictionary];

    NSMutableDictionary *rollScoreValues = [NSMutableDictionary dictionaryWithCapacity: 13];

    NSArray *sortedValues = [diceValues sortedArrayUsingSelector: @selector(compare:)];

    NSNumber *diceTotal = [diceValues valueForKeyPath:@"@sum.intValue"];

    NSCountedSet *countedSet = [[NSCountedSet alloc] initWithArray:sortedValues];

    BOOL hasThreeOfAKind = NO;

    BOOL hasFourOfAKind = NO;

    BOOL hasFiveOfAKind = NO;

    BOOL hasExactlyTwo = NO;

    BOOL hasExactlyThree = NO;

    // Check the number scores

    int i, count = 6;

    for (i = 1; i <= count; i++) {

        NSNumber *number = [NSNumber numberWithInt:i];

        int objectCount = [countedSet countForObject:number];

        NSString *key = [self scoreKeyForScoreCategoryTag: i];

        [rollScoreValues setObject: [NSNumber numberWithInt: (i * objectCount)] forKey: key];

        if (!hasThreeOfAKind && objectCount >= 3) hasThreeOfAKind = YES;

        if (!hasFourOfAKind && objectCount >= 4) hasFourOfAKind = YES;

        if (!hasFiveOfAKind && objectCount >= 5) hasFiveOfAKind = YES;

        if (!hasExactlyTwo && objectCount == 2) hasExactlyTwo = YES;

        if (!hasExactlyThree && objectCount == 3) hasExactlyThree = YES;

    }

    [countedSet release];

    if (hasThreeOfAKind) [rollScoreValues setObject: diceTotal forKey: DCThreeOfAKindScoreKey];

    else [rollScoreValues setObject: [NSNumber numberWithInt:0] forKey: DCThreeOfAKindScoreKey];

    if (hasFourOfAKind) [rollScoreValues setObject: diceTotal forKey: DCFourOfAKindScoreKey];

    else [rollScoreValues setObject: [NSNumber numberWithInt:0] forKey: DCFourOfAKindScoreKey];

    if (hasFiveOfAKind) [rollScoreValues setObject: [NSNumber numberWithInt:50] forKey: DCFiveOfAKindScoreKey];

    else [rollScoreValues setObject: [NSNumber numberWithInt:0] forKey: DCFiveOfAKindScoreKey];

    if (hasExactlyTwo && hasExactlyThree) [rollScoreValues setObject: [NSNumber numberWithInt:25] forKey: DCFullHouseScoreKey];

    else [rollScoreValues setObject: [NSNumber numberWithInt:0] forKey: DCFullHouseScoreKey];

    [rollScoreValues setValue: diceTotal forKey: DCChanceScoreKey];

    // Check for straights  

    unsigned int currentValue = 0;

    unsigned int lastValue = 743; // any number that will never be consecutive with 1 through 6

    unsigned int consecutiveNumberCount = 1;

    unsigned int maxConsecutiveNumberCount = 1;

    count = [sortedValues count];

    for (i = 0; i < count; i++) {

        currentValue = [[sortedValues objectAtIndex: i] unsignedIntValue];

        if (currentValue - 1 == lastValue) {

            consecutiveNumberCount++;

            maxConsecutiveNumberCount = MAX(maxConsecutiveNumberCount, consecutiveNumberCount);

        }

        else if (currentValue != lastValue) {

            consecutiveNumberCount = 1;

        }

        lastValue = currentValue;

    }

    if (maxConsecutiveNumberCount >= 4) [rollScoreValues setObject: [NSNumber numberWithInt:30] forKey: DCSmallStraightScoreKey];

    else [rollScoreValues setObject: [NSNumber numberWithInt:0] forKey: DCSmallStraightScoreKey];

    if (maxConsecutiveNumberCount == 5) [rollScoreValues setObject: [NSNumber numberWithInt:40] forKey: DCLargeStraightScoreKey];

    else [rollScoreValues setObject: [NSNumber numberWithInt:0] forKey: DCLargeStraightScoreKey];   

    return rollScoreValues;

}

-(id) initWithNumberOfRollsPerTurn:(unsigned int) rolls {

    self = [super init];

    if (self) {

        numberOfRollsPerTurn = rolls;

        numberOfTurnsRemaining = NUMBER_OF_TURNS;

        numberOfRollsRemaining = numberOfRollsPerTurn;

        scoreValues = [[NSMutableDictionary alloc] initWithCapacity: 20];

        [scoreValues setValue: [NSNumber numberWithInt: 0] forKey: DCUpperSubtotalKey];

        [scoreValues setValue: [NSNumber numberWithInt: 0] forKey: DCBonusKey];

        [scoreValues setValue: [NSNumber numberWithInt: 0] forKey: DCUpperTotalKey];

        [scoreValues setValue: [NSNumber numberWithInt: 0] forKey: DCLowerSubtotalKey];

        [scoreValues setValue: [NSNumber numberWithInt: 0] forKey: DCFiveOfAKindBonusKey];

        [scoreValues setValue: [NSNumber numberWithInt: 0] forKey: DCGrandTotalKey];

    }

    return self;

}

-(void)dealloc {

    [scoreValues release];

    [super dealloc];

}

-(void)recordDiceRoll:(NSArray *)value {

    if (diceValues != value) {

        [diceValues release];

        diceValues = [value copy];

        [self willChangeValueForKey:@"rollValues"];

        [self willChangeValueForKey:@"numberOfRollsRemaining"];

        numberOfRollsRemaining--;

        [self didChangeValueForKey:@"numberOfRollsRemaining"];

[self rollValues];

        [self didChangeValueForKey:@"rollValues"];

    }

}

-(unsigned int)numberOfTurnsRemaining {

    return numberOfTurnsRemaining;

}

-(unsigned int)numberOfRollsRemaining {

    return numberOfRollsRemaining;

}

-(BOOL)canRoll {

    return (numberOfRollsRemaining > 0 && ![self isGameOver]);

}

-(BOOL)canScore {

    return numberOfTurnsRemaining > 0;

}

-(BOOL)isGameOver {

    return numberOfTurnsRemaining < 1;

}

-(void)recordScoreForScoreCategoryTag:(DCScoreCategoryTag)categoryTag

{

    BOOL isUpperSection = (categoryTag < DCThreeOfAKindScoreTag);

    NSString *scoreCategoryKey = [self scoreKeyForScoreCategoryTag:categoryTag];

    int addedScore = 0;

    [self willChangeValueForKey: @"scoreValues"];

    NSNumber *rollValue = [[self rollValues] valueForKey: scoreCategoryKey];

    [scoreValues setValue: rollValue forKey: scoreCategoryKey];

    addedScore = [rollValue intValue];

    if (isUpperSection) {

        NSNumber *subtotal = [scoreValues valueForKey: DCUpperSubtotalKey];

        int subtotalInt = [subtotal intValue];

        int newSubtotal = subtotalInt + addedScore;

        [scoreValues setValue: [NSNumber numberWithInt: newSubtotal] forKey: DCUpperSubtotalKey];

        if (subtotalInt < UPPER_SECTION_BONUS_GOAL && newSubtotal >= UPPER_SECTION_BONUS_GOAL) {

                [scoreValues setValue: [NSNumber numberWithInt:UPPER_SECTION_BONUS_VALUE] forKey: DCBonusKey];

                addedScore += UPPER_SECTION_BONUS_VALUE;

        }

        NSNumber *upperTotal = [scoreValues valueForKey: DCUpperTotalKey];

        [scoreValues setValue: [NSNumber numberWithInt: [upperTotal intValue] + addedScore] forKey: DCUpperTotalKey];

    } else {

        NSNumber *lowerSubtotal = [scoreValues valueForKey: DCLowerSubtotalKey];

        [scoreValues setValue: [NSNumber numberWithInt: [lowerSubtotal intValue] + addedScore] forKey: DCLowerSubtotalKey];

    }

    if(addedScore) {

        NSNumber *grandTotal = [scoreValues valueForKey: DCGrandTotalKey];

        [scoreValues setValue: [NSNumber numberWithInt: [grandTotal intValue] + addedScore] forKey: DCGrandTotalKey];

    }

    [self didChangeValueForKey: @"scoreValues"];

    [self willChangeValueForKey:@"numberOfTurnsRemaining"];

    numberOfTurnsRemaining--;

    [self didChangeValueForKey:@"numberOfTurnsRemaining"];

    [self willChangeValueForKey:@"numberOfRollsRemaining"];

    numberOfRollsRemaining = numberOfRollsPerTurn;

    [self didChangeValueForKey:@"numberOfRollsRemaining"];

    [self willChangeValueForKey:@"rollValues"];

    [diceValues release];

    diceValues = [[NSArray alloc] init];

    [self didChangeValueForKey:@"rollValues"];

}

- (NSDictionary *)scoreValues {

    return scoreValues;

}

@end