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/* Author: Ioan Sucan */

#include "ompl/control/spaces/DiscreteControlSpace.h"
#include "ompl/util/Exception.h"

void ompl::control::DiscreteControlSampler::sample(Control *control)
{
    control->as<DiscreteControlSpace::ControlType>()->value =
        rng_.uniformInt(space_->as<DiscreteControlSpace>()->getLowerBound(),
                        space_->as<DiscreteControlSpace>()->getUpperBound());
}

unsigned int ompl::control::DiscreteControlSpace::getDimension() const
{
    return 1;
}

void ompl::control::DiscreteControlSpace::copyControl(Control *destination, const Control *source) const
{
    destination->as<ControlType>()->value = source->as<ControlType>()->value;
}

bool ompl::control::DiscreteControlSpace::equalControls(const Control *control1, const Control *control2) const
{
    return control1->as<ControlType>()->value == control2->as<ControlType>()->value;
}

ompl::control::ControlSamplerPtr ompl::control::DiscreteControlSpace::allocDefaultControlSampler() const
{
    return ControlSamplerPtr(new DiscreteControlSampler(this));
}

ompl::control::Control* ompl::control::DiscreteControlSpace::allocControl() const
{
    return new ControlType();
}

void ompl::control::DiscreteControlSpace::freeControl(Control *control) const
{
    delete static_cast<ControlType*>(control);
}

void ompl::control::DiscreteControlSpace::nullControl(Control *control) const
{
    control->as<ControlType>()->value = lowerBound_;
}

void ompl::control::DiscreteControlSpace::printControl(const Control *control, std::ostream &out) const
{
    out << "DiscreteControl [";
    if (control)
        out << control->as<ControlType>()->value;
    else
        out << "NULL";
    out << ']' << std::endl;
}

void ompl::control::DiscreteControlSpace::printSettings(std::ostream &out) const
{
    out << "Discrete control space '" << getName() << "' with bounds [" << lowerBound_ << ", " << upperBound_ << "]" << std::endl;
}

void ompl::control::DiscreteControlSpace::setup()
{
    if (lowerBound_ > upperBound_)
        throw Exception("Lower bound cannot be larger than upper bound for a discrete space");
    ControlSpace::setup();
}

unsigned int ompl::control::DiscreteControlSpace::getSerializationLength() const
{
    return sizeof(int);
}

void ompl::control::DiscreteControlSpace::serialize(void *serialization, const Control *ctrl) const
{
    memcpy(serialization, &ctrl->as<ControlType>()->value, sizeof(int));
}

void ompl::control::DiscreteControlSpace::deserialize(Control *ctrl, const void *serialization) const
{
    memcpy(&ctrl->as<ControlType>()->value, serialization, sizeof(int));
}
