/* Copyright 2015, Michele Santullo
 * This file is part of DoorKeeper.
 *
 * DoorKeeper is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DoorKeeper is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with DoorKeeper.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace dk {
	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	Tyler<D>::Tyler() {
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	template <typename T>
	Layer<T, D>& Tyler<D>::push_layer (BaseMapSource<D>* parTilemap, int parIndex) {
		//TODO: store the index
		(void)parIndex;

		auto newLayer = new Layer<T, D>(parTilemap);
		m_layers.push_back(LayerPtr(newLayer));

		for (auto& callback : m_layerobs_callbacks) {
			if (nullptr != callback) {
				callback(*newLayer, true);
			}
		}
		return *newLayer;
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	template <typename T>
	void Tyler<D>::push_layer_void (BaseMapSource<D>* parTilemap, int parIndex) {
		push_layer<T>(parTilemap, parIndex);
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	void Tyler<D>::preload (const coords& parFrom, const coords& parTo) {
		for (auto& layer : m_layers) {
			layer->preload(parFrom, parTo);
		}
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	auto Tyler<D>::begin() -> iterator {
		return iterator(m_layers.begin());
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	auto Tyler<D>::begin() const -> const_iterator {
		return const_iterator(m_layers.begin());
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	auto Tyler<D>::end() -> iterator {
		return iterator(m_layers.end());
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	auto Tyler<D>::end() const -> const_iterator {
		return const_iterator(m_layers.end());
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	auto Tyler<D>::register_for_layeradd (layer_callback parCallback) -> LayerObsID {
		auto retval = m_layerobs_idmanager.allocate();
		DK_ASSERT(retval.index() > 0);
		if (retval.index() > m_layerobs_callbacks.size()) {
			DK_ASSERT(retval.index() == m_layerobs_callbacks.size() + 1);
			m_layerobs_callbacks.resize(retval.index());
		}
		else {
			DK_ASSERT(retval.salt() > 0);
		}
		m_layerobs_callbacks[retval.index() - 1] = parCallback;
		return retval;
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	template <uint32_t D>
	void Tyler<D>::unregister_for_layeradd (LayerObsID parID) {
		DK_ASSERT(parID.index() <= m_layerobs_callbacks.size());
		DK_ASSERT(nullptr != m_layerobs_callbacks[parID.index() - 1]);
		m_layerobs_callbacks[parID.index() - 1] = nullptr;
		m_layerobs_idmanager.free(parID);
	}
} //namespace dk