namespace dkh {
	template <uint32_t D>
	struct TylerMapSource<D>::LayerInfo {
		dk::HashType hash;
		uint32_t data_start;
		uint32_t data_length;
	};

	template <uint32_t D>
	TylerMapSource<D>::TylerMapSource (const char* parFilename) :
		m_stream(new std::ifstream(parFilename)),
		m_stream_start(m_stream->tellg())
	{
		parse_map_data(*m_stream);
	}

	template <uint32_t D>
	TylerMapSource<D>::TylerMapSource (const std::string& parFilename) :
		m_stream(new std::ifstream(parFilename)),
		m_stream_start(m_stream->tellg())
	{
		parse_map_data(*m_stream);
	}

	template <uint32_t D>
	TylerMapSource<D>::TylerMapSource (std::istream* parData) :
		m_stream(parData),
		m_stream_start(m_stream->tellg())
	{
		parse_map_data(*m_stream);
	}

	template <uint32_t D>
	void TylerMapSource<D>::parse_map_data (std::istream& parSrc) {
		//Read file header
		implem::TylerMapHeader header;
		implem::read_header(parSrc, header);

		if (header.dimensions != D) {
			throw InvalidMapDimensionsException();
		}

		switch (header.map_type) {
		case dk::MapType_IsometricStaggered:
			m_map_type = dk::MapType_IsometricStaggered;
			break;
		case dk::MapType_Isometric:
			m_map_type = dk::MapType_Isometric;
			break;
		case dk::MapType_Orthogonal:
			m_map_type = dk::MapType_Orthogonal;
			break;
		case dk::MapType_Hex:
			m_map_type = dk::MapType_Hex;
			break;
		default:
			throw InvalidMapFileException();
		}

		//Read map and tile dimensions
		{
			std::vector<uint32_t> map_dims;
			std::vector<uint16_t> tile_dims;
			const auto read_start = (header.dimensions_start > sizeof(header) ? header.dimensions_start - sizeof(header) : sizeof(header));
			parSrc.seekg(read_start, std::ios_base::cur);
			implem::read_dimensions(parSrc, D, map_dims, tile_dims);
			for (std::size_t z = 0; z < map_dims.size(); ++z) {
				m_map_size[z] = map_dims[z];
				m_tile_size[z] = tile_dims[z];
			}
		}

		//Read vorbis comments
		parSrc.seekg(header.comment_start + m_stream_start, std::ios_base::beg);
		implem::read_comments(parSrc, m_file_vendor, m_comments);
	}

	template <uint32_t D>
	const typename TylerMapSource<D>::coords& TylerMapSource<D>::mapSize() const {
		return m_map_size;
	}

	template <uint32_t D>
	const typename TylerMapSource<D>::coords& TylerMapSource<D>::tileSize() const {
		return m_tile_size;
	}

	template <uint32_t D>
	void TylerMapSource<D>::fetch_raw (char* parOut, const coords& parFrom, const coords& parTo, std::size_t parSize) {
		(void)parOut;
		(void)parFrom;
		(void)parTo;
		(void)parSize;
	}

	template <uint32_t D>
	dk::MapTypes TylerMapSource<D>::mapType() const {
		return m_map_type;
	}

	template <uint32_t D>
	int TylerMapSource<D>::layersCount() const {
		return m_layer_count;
	}

	template <uint32_t D>
	void TylerMapSource<D>::chainedMaps (std::vector<std::string>& parOut) const {
		implem::extract_array_from_comments(parOut, "chained_map", m_comments);
	}

	template <uint32_t D>
	dk::HashType TylerMapSource<D>::layerTypeHash (int parIndex) const {
		DK_ASSERT(parIndex >= 0);
		DK_ASSERT(static_cast<std::size_t>(parIndex) < m_layers_info.size());
		return m_layers_info[parIndex].hash;
	}
} //namespace dkh