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/* Author: Ioan Sucan */

#ifndef OMPL_BASE_SPACES_SO2_STATE_SPACE_
#define OMPL_BASE_SPACES_SO2_STATE_SPACE_

#include "ompl/base/StateSpace.h"

namespace ompl
{
    namespace base
    {
        /** \brief State space sampler for SO(2) */
        class SO2StateSampler : public StateSampler
        {
        public:
            /** \brief Constructor */
            SO2StateSampler(const StateSpace *space) : StateSampler(space)
            {
            }

            void sampleUniform(State *state) override;
            void sampleUniformNear(State *state, const State *near, const double distance) override;
            void sampleGaussian(State *state, const State *mean, const double stdDev) override;
        };

        /** \brief A state space representing SO(2). The distance
            function and interpolation take into account angle
            wrapping. */
        class SO2StateSpace : public StateSpace
        {
        public:
            /** \brief The definition of a state in SO(2) */
            class StateType : public State
            {
            public:
                /** \brief Set the state to identity -- no rotation (value = 0.0) */
                void setIdentity()
                {
                    value = 0.0;
                }

                /** \brief The value of the angle in the interval (-Pi, Pi] */
                double value;
            };

            SO2StateSpace() : StateSpace()
            {
                setName("SO2" + getName());
                type_ = STATE_SPACE_SO2;
            }

            ~SO2StateSpace() override = default;

            unsigned int getDimension() const override;

            double getMaximumExtent() const override;

            double getMeasure() const override;

            /** \brief Normalize the value of the state to the interval [-Pi, Pi) */
            void enforceBounds(State *state) const override;

            /** \brief Check if the value of the state is in the interval [-Pi, Pi) */
            bool satisfiesBounds(const State *state) const override;

            void copyState(State *destination, const State *source) const override;

            unsigned int getSerializationLength() const override;

            void serialize(void *serialization, const State *state) const override;

            void deserialize(State *state, const void *serialization) const override;

            double distance(const State *state1, const State *state2) const override;

            bool equalStates(const State *state1, const State *state2) const override;

            void interpolate(const State *from, const State *to, const double t, State *state) const override;

            StateSamplerPtr allocDefaultStateSampler() const override;

            State *allocState() const override;

            void freeState(State *state) const override;

            double *getValueAddressAtIndex(State *state, const unsigned int index) const override;

            void printState(const State *state, std::ostream &out) const override;

            void printSettings(std::ostream &out) const override;

            void registerProjections() override;
        };
    }
}

#endif
