/// 

/// This checks if the ball is of striped colors
/// 
/// 
/// 
bool AStartSetUp::isStriped(int ball)
{
    if (9 <= ball && ball <= 15) return true;
    else return false;
}


/// 

/// This allocates starting positions in triangle for the balls, 1 = tip towards the cue ball
/// 
/// 
/// 
TArray AStartSetUp::startLocations()
{
    srand(time(nullptr)); //random seed
    short randValue = rand();

    //list of balls in random order
    TArray balls;
    while (balls.Num() < 15)
    {
        int newBall = rand() % 15 + 1;
        balls.AddUnique(newBall);
    }
          
    //8-ball must be in the middle
    for (int i = 0; i != balls.Num(); ++i)
    {
        if (balls[i] == 8)
        {
            balls[i] = balls[4];
            balls[4] = 8;
        }
    }

    //low corner balls must be of different style
    while (isStriped(balls[10]) == isStriped(balls[14]))
    {
        for (int i = 0; i < 15; i++)
        {
            if (balls[i] != 8)
            {
                int tmp = balls[i];
                balls[i] = balls[10];
                balls[10] = tmp;
            }
        }
    }

    return balls;
}


/// 

/// Create array of ball materials to blueprint use
/// 
/// 
TArray AStartSetUp::ballMaterials()
{
    TArray materials;

    for (int i = 1; i <= 15; i++)
    {

        // Path to the Material Instance in the Content Browser
        FString materialPath = FString::Printf(TEXT("/Game/BilliardsAssets/M_ball_Inst%d.M_ball_Inst%d"), i, i);

        // Load the Material Instance
        UMaterialInstanceConstant* materialInstance = Cast(StaticLoadObject(UMaterialInstanceConstant::StaticClass(), NULL, *materialPath));

        if (materialInstance)
        {
            // Material Instance successfully fetched
            materials.Add(materialInstance);
        }
    }

    return materials;
}