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#pragma once
#include "indexer/feature_altitude.hpp"
#include "indexer/mwm_set.hpp"
#include "coding/memory_region.hpp"
#include "geometry/point_with_altitude.hpp"
#include <memory>
#include <string>
#include <vector>
#include "3party/succinct/rs_bit_vector.hpp"
class DataSource;
namespace feature
{
// @TODO(bykoianko) |m_altitudeAvailability| and |m_featureTable| are saved without
// taking into account endianness. It should be fixed. The plan is
// * to use one bit form AltitudeHeader::m_version for keeping information about endianness. (Zero
// should be used for big endian.)
// * to check the endianness of the reader and the bit while reading and to use an appropriate
// methods for reading.
class AltitudeLoader
{
public:
AltitudeLoader(DataSource const & dataSource, MwmSet::MwmId const & mwmId);
/// \returns altitude of feature with |featureId|. All items of the returned vector are valid
/// or the returned vector is empty.
geometry::Altitudes const & GetAltitudes(uint32_t featureId, size_t pointCount);
bool HasAltitudes() const;
void ClearCache() { m_cache.clear(); }
private:
std::unique_ptr<CopiedMemoryRegion> m_altitudeAvailabilityRegion;
std::unique_ptr<CopiedMemoryRegion> m_featureTableRegion;
succinct::rs_bit_vector m_altitudeAvailability;
succinct::elias_fano m_featureTable;
std::unique_ptr<FilesContainerR::TReader> m_reader;
std::map<uint32_t, geometry::Altitudes> m_cache;
AltitudeHeader m_header;
std::string m_countryFileName;
MwmSet::MwmHandle m_handle;
};
} // namespace feature
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