/*
 * This file is part of FGGL.
 *
 * FGGL is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 *
 * FGGL 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with FGGL.
 * If not, see <https://www.gnu.org/licenses/>.
 */

//
// Created by webpigeon on 27/08/22.
//

#ifndef FGGL_DEMO_INCLUDE_GRID_HPP
#define FGGL_DEMO_INCLUDE_GRID_HPP

#include <memory>

#include "fggl/scenes/game.hpp"
#include "fggl/entity/gridworld/zone.hpp"

#include "fggl/animation/animator.hpp"
#include "fggl/gui/gui.hpp"

namespace demo {

	constexpr int GRID_SIZE = 255;
	using DemoGrid = fggl::entity::grid::Area2D<GRID_SIZE, GRID_SIZE>;

	struct LevelRules {
		fggl::math::vec2i startingPos;
		uint32_t startingDirection;
		uint32_t startingPower;
	};

	struct CellPos {
		fggl::math::vec2i pos;
		uint8_t direction;

		fggl::math::vec2f drawOffset{0.0F, 0.0F};
		float rotationOffset{0.0F};
	};

	struct Program {
		std::vector<std::function<void(void)>> m_instructions;
		uint32_t m_currInstruction;
		bool playing = false;
	};

	struct RobotState {
		uint32_t power = 64;
	};

	class GridScene : public fggl::scenes::GameBase {
		public:
			explicit GridScene(fggl::App& app);
			void activate() override;
			void deactivate() override;

			void update(float dt) override;
			void render(fggl::gfx::Graphics& gfx) override;
		private:
			fggl::entity::grid::TileSet m_tiles;
			fggl::animation::FrameAnimator m_animator;
			std::unique_ptr<DemoGrid> m_grid;
			fggl::gui::Container m_canvas;
			LevelRules m_levelRules;

			fggl::entity::EntityID m_player = fggl::entity::INVALID;
			Program m_program;

			void resetPuzzle();

			void tickPlayer();
			void checkVictory();

			inline void forward() {
				auto& cell = m_grid->entities().get<CellPos>(m_player);
				fggl::math::vec2i moveDir{0,0};
				if ( cell.direction == 0) {
					moveDir.y = 1;
				} else if (cell.direction == 1) {
					moveDir.x = 1;
				} else if (cell.direction == 2) {
					moveDir.y = -1;
				} else if (cell.direction == 3) {
					moveDir.x = -1;
				}
				cell.pos += moveDir;
			}

			inline void rotate(bool clockwise) {
				auto& cell = m_grid->entities().get<CellPos>(m_player);
				int direction = clockwise ? +1 : -1;
				cell.direction = (cell.direction + 4 + direction) % 4;
			}

	};

}

#endif //FGGL_DEMO_INCLUDE_GRID_HPP