#include "cog.h"

class Cog::Impl
{
private:
    float m_radius;
    float m_circumference;
    int m_numteeth;
public:
    Impl();
    bool IsValid() const;
    float radius() const;
    bool radius(float);
};

Cog::Impl::Impl()
{
    m_radius = Cog::InvalidRadius;
}

bool Cog::Impl::IsValid() const
{
    //
    // need lots more checks here...
    //
    return true;
}

float Cog::Impl::radius() const
{
    if (!IsValid())
        return Cog::InvalidRadius;
    return m_radius;
}

bool Cog::Impl::radius(float radius)
{
    if (!IsValid())
        return false;

    // should validate radius arg here...
    m_radius = radius;

    return true;
}

Cog::Cog()
{
    impl = new Impl; 
}

Cog::~Cog()
{
    if (impl)
    {
        delete impl;
        impl = 0;
    }
}

float Cog::radius() const
{
    if (impl)
        return impl->radius();
    else
        return InvalidRadius;
}

bool Cog::radius(float radius)
{
    if (impl)
        return impl->radius(radius);
    else
        return false;     
}