/*
 * Copyright (C) 2017  Christopher J. Howard
 *
 * This file is part of Antkeeper Source Code.
 *
 * Antkeeper Source Code 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.
 *
 * Antkeeper Source Code 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 Antkeeper Source Code.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef APPLICATION_HPP
#define APPLICATION_HPP

#include <emergent/emergent.hpp>
using namespace Emergent;

#include "mesh.hpp"
#include "terrain.hpp"
#include "input.hpp"
#include "controls.hpp"
#include "settings.hpp"
#include "render-passes.hpp"
#include "ui/ui.hpp"
#include "ui/tween.hpp"

class Menu;
class ApplicationState;
class Colony;
class SplashState;
class TitleState;
class ExperimentState;
class CameraController;
class SurfaceCameraController;
class TunnelCameraController;
class LineBatcher;
class ModelLoader;
class MaterialLoader;

class Application
{
public:
	Application(int argc, char* argv[]);
	~Application();
	
	// Executes the application and returns a status code
	int execute();
	
	// Changes the application state
	void changeState(ApplicationState* state);
	
	// Sets the termination code to be returned when the application finishes
	void setTerminationCode(int code);
	
	// Closes the application
	void close(int terminationCode);
	
	void changeFullscreen();
	void changeVerticalSync();
	void saveUserSettings();
	void resizeUI();
	
	void enterMenu(std::size_t index);
	void exitMenu(std::size_t index);
	void selectMenuItem(std::size_t index);
	void activateMenuItem(std::size_t index);
	
private:
	ApplicationState* state;
	ApplicationState* nextState;
	int terminationCode;
	
public:
	SDL_Window* window;
	SDL_GLContext context;
	ModelInstance lensToolObject;
	ModelInstance forcepsToolObject;
	ModelInstance navigatorObject;
	DirectionalLight sunlight;
	DirectionalLight fillLight;
	DirectionalLight backLight;
	Spotlight lensHotspot;
	Spotlight lensFalloff;
	RenderTarget shadowMapRenderTarget;
	GLuint shadowFramebuffer;
	GLuint shadowDepthTexture;
	ShadowMapRenderPass shadowMapPass;
	Compositor shadowCompositor;
	Camera sunlightCamera;
	RenderTarget defaultRenderTarget;
	LightingRenderPass lightingPass;
	DebugRenderPass debugPass;
	Compositor defaultCompositor;
	Camera camera;
	Scene scene;
	BillboardBatch particleBatch;
	
	MaterialLoader* materialLoader;
	ModelLoader* modelLoader;
	
	
	Renderer renderer;
	int toolIndex;
	
	std::string appDataPath;
	std::string userDataPath;
	ParameterDict settings;
	std::string defaultSettingsFilename;
	std::string userSettingsFilename;
	

	bool fullscreen;
	int fullscreenWidth;
	int fullscreenHeight;
	int windowedWidth;
	int windowedHeight;
	int swapInterval;
	int width;
	int height;

	InputManager* inputManager;
	Keyboard* keyboard;
	Mouse* mouse;
	
	SplashState* splashState;
	TitleState* titleState;
	ExperimentState* experimentState;
	
	ControlProfile* menuControlProfile;
	Control menuLeft;
	Control menuRight;
	Control menuUp;
	Control menuDown;
	Control menuSelect;
	Control menuCancel;
	Control toggleFullscreen;
	Control escape;
	
	ControlProfile* gameControlProfile;
	Control cameraMoveForward;
	Control cameraMoveBack;
	Control cameraMoveLeft;
	Control cameraMoveRight;
	Control cameraRotateCW;
	Control cameraRotateCCW;
	Control cameraZoomIn;
	Control cameraZoomOut;
	Control cameraToggleOverheadView;
	Control cameraToggleNestView;
	bool cameraOverheadView;
	bool cameraNestView;
	
	// Misc
	Timer frameTimer;
	
	// UI
	ParameterDict strings;
	float dpi;
	float fontSizePT;
	float fontSizePX;
	Font* menuFont;
	Texture splashTexture;
	Texture titleTexture;
	Vector4 selectedColor;
	Vector4 deselectedColor;
	UIContainer* uiRootElement;
	UIImage* blackoutImage;
	UIImage* splashImage;
	UIImage* titleImage;
	UIImage* copyrightImage;
	UILabel* anyKeyLabel;
	UILabel* menuSelectorLabel;
	UIContainer* mainMenuContainer;
	UIContainer* challengeMenuContainer;
	UIContainer* experimentMenuContainer;
	UIContainer* settingsMenuContainer;
	UILabel* challengeLabel;
	UILabel* experimentLabel;
	UILabel* settingsLabel;
	UILabel* quitLabel;
	UILabel* loadLabel;
	UILabel* newLabel;
	UILabel* experimentBackLabel;
	UILabel* videoLabel;
	UILabel* audioLabel;
	UILabel* controlsLabel;
	UILabel* gameLabel;
	UILabel* settingsBackLabel;
	UIContainer* pauseMenuContainer;
	UILabel* pausedResumeLabel;
	UILabel* pausedSaveLabel;
	UILabel* pausedNewLabel;
	UILabel* pausedSettingsLabel;
	UILabel* returnToMainMenuLabel;
	UILabel* quitToDesktopLabel;
	
	BillboardBatch* uiBatch;
	UIBatcher* uiBatcher;
	UIRenderPass uiPass;
	Compositor uiCompositor;
	Camera uiCamera;
	Scene uiScene;
	
	Camera bgCamera;
	BillboardBatch bgBatch;
	Compositor bgCompositor;
	VignetteRenderPass vignettePass;
	Scene bgScene;
	
	// Animation
	Tweener* tweener;
	Tween<Vector4>* fadeInTween;
	Tween<Vector4>* fadeOutTween;
	Tween<Vector4>* splashFadeInTween;
	Tween<Vector4>* splashFadeOutTween;
	Tween<Vector4>* titleFadeInTween;
	Tween<Vector4>* titleFadeOutTween;
	Tween<Vector4>* copyrightFadeInTween;
	Tween<Vector4>* copyrightFadeOutTween;
	Tween<Vector4>* anyKeyFadeInTween;
	Tween<Vector4>* anyKeyFadeOutTween;
	
	Tween<Vector4>* menuFadeInTween;
	Tween<Vector4>* menuFadeOutTween;
	Tween<Vector2>* menuSlideInTween;
	
	// Menus
	std::size_t menuCount;
	Menu** menus;
	int currentMenuIndex;
	int selectedMenuItemIndex;
	UIContainer** menuContainers;
	
	Menu* currentMenu;
	Menu* mainMenu;
	Menu* challengeMenu;
	Menu* experimentMenu;
	Menu* settingsMenu;
	
	// Models
	Model* displayModel;
	Model* antModel;
	ModelInstance* displayModelInstance;
	ModelInstance* antModelInstance;
	
	// Game variables
	Colony* colony;
	SurfaceCameraController* surfaceCam;
	TunnelCameraController* tunnelCam;
	
	Plane clippingPlanes[5];
	Vector3 clippingPlaneNormals[5];
	Vector3 clippingPlaneOffsets[5];
	AABB clippingPlaneAABBS[5];
	
	// Debug
	LineBatcher* lineBatcher;
};

#endif // APPLICATION_HPP