// Copyright (c) 2016-2018 Easy2D - Nomango
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#pragma once
#include "base.h"
#include "window.h"

namespace easy2d
{
	class Scene;
	class Transition;

	class Game
	{
	public:
		Game();

		~Game();

		// 更新时
		virtual void OnUpdate(float dt) {}

		// 退出时
		virtual void OnExit() {}

		// 窗口关闭时
		// 返回值：返回 false 将阻止窗口关闭
		virtual bool OnClose() { return true; }

		// 初始化
		void Initialize(
			const window::Property& property	/* 窗口属性 */
		);

		// 运行
		void Run();

		// 结束
		void Quit();

		// 调试模式
		void SetDebugMode(
			bool enabled
		);

		// 切换场景
		void EnterScene(
			Scene * scene,						/* 场景 */
			Transition * transition	= nullptr	/* 场景动画 */
		);

		// 获取当前场景
		Scene * GetCurrentScene();

		// 是否正在进行场景过渡
		bool IsTransitioning() const;

		// 渲染场景画面
		void DrawScene();

		// 更新场景
		void UpdateScene(
			float dt
		);

		// 获取实例
		static Game * GetInstance();

	protected:
		E2D_DISABLE_COPY(Game);

	private:
		bool		debug_mode_;
		bool		quit_;
		Scene*		curr_scene_;
		Scene*		next_scene_;
		Transition*	transition_;
	};
}