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/* Author: Ryan Luna */

// PlannerDataStorage requires Boost version >= 1.44
#include <boost/version.hpp>
#if BOOST_VERSION < 104400
#warning Boost version >= 1.44 is required for PlannerDataStorage classes
#else

#include "ompl/base/PlannerDataStorage.h"
#include <boost/archive/archive_exception.hpp>

static const boost::uint32_t OMPL_PLANNER_DATA_ARCHIVE_MARKER = 0x5044414D; // this spells PDAM

ompl::base::PlannerDataStorage::PlannerDataStorage(void)
{
}

ompl::base::PlannerDataStorage::~PlannerDataStorage(void)
{
}

void ompl::base::PlannerDataStorage::store(const PlannerData& pd, const char *filename)
{
    std::ofstream out(filename, std::ios::binary);
    store(pd, out);
    out.close();
}

void ompl::base::PlannerDataStorage::store(const PlannerData& pd, std::ostream &out)
{
    const SpaceInformationPtr &si = pd.getSpaceInformation();
    if (!out.good())
    {
        OMPL_ERROR("Failed to store PlannerData: output stream is invalid");
        return;
    }
    if (!si)
    {
        OMPL_ERROR("Failed to store PlannerData: SpaceInformation is invalid");
        return;
    }
    try
    {
        boost::archive::binary_oarchive oa(out);

        // Writing the header
        Header h;
        h.marker = OMPL_PLANNER_DATA_ARCHIVE_MARKER;
        h.vertex_count = pd.numVertices();
        h.edge_count = pd.numEdges();
        si->getStateSpace()->computeSignature(h.signature);
        oa << h;

        storeVertices(pd, oa);
        storeEdges(pd, oa);
    }
    catch (boost::archive::archive_exception &ae)
    {
        OMPL_ERROR("Failed to store PlannerData: %s", ae.what());
    }
}

void ompl::base::PlannerDataStorage::load(const char *filename, PlannerData& pd)
{
    std::ifstream in(filename, std::ios::binary);
    load(in, pd);
    in.close();
}

void ompl::base::PlannerDataStorage::load(std::istream &in, PlannerData& pd)
{
    pd.clear();

    const SpaceInformationPtr &si = pd.getSpaceInformation();
    if (!in.good())
    {
        OMPL_ERROR("Failed to load PlannerData: input stream is invalid");
        return;
    }
    if (!si)
    {
        OMPL_ERROR("Failed to load PlannerData: SpaceInformation is invalid");
        return;
    }
    // Loading the planner data:
    try
    {
        boost::archive::binary_iarchive ia(in);

        // Read the header
        Header h;
        ia >> h;

        // Checking the archive marker
        if (h.marker != OMPL_PLANNER_DATA_ARCHIVE_MARKER)
        {
            OMPL_ERROR("Failed to load PlannerData: PlannerData archive marker not found");
            return;
        }

        // Verify that the state space is the same
        std::vector<int> sig;
        si->getStateSpace()->computeSignature(sig);
        if (h.signature != sig)
        {
            OMPL_ERROR("Failed to load PlannerData: StateSpace signature mismatch");
            return;
        }

        // File seems ok... loading vertices and edges
        loadVertices(pd, h.vertex_count, ia);
        loadEdges(pd, h.edge_count, ia);
    }
    catch (boost::archive::archive_exception &ae)
    {
        OMPL_ERROR("Failed to load PlannerData: %s", ae.what());
    }
}

#endif
