/* 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>
	LayeredViewport<D>::LayeredViewport (Tyler<D>& parTyler) :
		m_tyler(parTyler)
	{
		for (const auto& layer : m_tyler) {
			const TileInfo<D> tinfo(layer);
			auto it_found = m_views.find(tinfo);
			if (m_views.end() == it_found) {
				auto it_new = m_views.insert(it_found, Viewport<D>(m_tyler, nullptr));
				it_new->second.set_tile_info(&it_new->first);
			}
		}

		m_tyler.register_for_layeradd(this);
	}

	template <uint32_t D>
	LayeredViewport<D>::~LayeredViewport() noexcept {
		m_tyler.unregister_for_layeradd(this);
	}

	template <uint32_t D>
	LayeredViewport<D>& LayeredViewport<D>::operator+= (const coords_f& parValue) {
		for (auto& view : m_views) {
			view.second += parValue;
		}
		return *this;
	}

	template <uint32_t D>
	LayeredViewport<D>& LayeredViewport<D>::operator-= (const coords_f& parValue) {
		for (auto& view : m_views) {
			view.second -= parValue;
		}
		return *this;
	}

	template <uint32_t D>
	void LayeredViewport<D>::on_layer_added (const LayerBase<D>* parLayer) {
	}

	template <uint32_t D>
	void LayeredViewport<D>::on_layer_removed (const LayerBase<D>* parLayer) {
	}

	template <uint32_t D>
	auto LayeredViewport<D>::begin() -> iterator {
		return iterator(m_view.begin(), std::bind(&LayeredViewport<D>::viewport, this, std::placeholders::_1));

	template <uint32_t D>
	auto LayeredViewport<D>::begin() const -> const_iterator {
		return const_iterator(m_view.begin(), std::bind(&LayeredViewport<D>::viewport, this, std::placeholders::_1));
	}

	template <uint32_t D>
	auto LayeredViewport<D>::end() -> iterator {
		return iterator(m_view.end(), std::bind(&LayeredViewport<D>::viewport, this, std::placeholders::_1));

	template <uint32_t D>
	auto LayeredViewport<D>::end() const -> const_iterator {
		return const_iterator(m_view.end(), std::bind(&LayeredViewport<D>::viewport, this, std::placeholders::_1));
	}

	template <uint32_t D>
	Viewport<D>& LayeredViewport<D>::viewport (const LayerBase<D>& parLayer) {
		return const_cast<Viewport<D>&>(const_cast<const LayeredViewport<D>*>(this)->viewport(parLayer));

	template <uint32_t D>
	const Viewport<D>& LayeredViewport<D>::viewport (const LayerBase<D>& parLayer) const {
		const TileInfo tinfo { parLayer.tile_size(), parLayer.map_size() };
		return m_views[tinfo];
	}
} //namespace dk