/*
* Vulkan Example base class
*
* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
*
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
*/

#pragma once



#include <iostream>
#include <chrono>
#include <sys/stat.h>

#define GLM_FORCE_RADIANS
#define GLM_FORCE_DEPTH_ZERO_TO_ONE
#define GLM_ENABLE_EXPERIMENTAL


//#define GLM_FORCE_LEFT_HANDED
#include <glm/glm.hpp>
#include <string>
#include <sstream>
#include <array>
#include <numeric>
#include <filesystem>

#include "renderConfig.h"
#include "vulkan/vulkan.h"

#include "VulkanTools.h"
#include "camera.hpp"
#include "keycodes.hpp"

#include "VulkanDevice.hpp"
//#include "VulkanSwapChain.hpp"

//#include "imgui/imgui.h"

class VulkanExampleBase
{
private:	
	float fpsTimer = 0.0f;
	uint32_t frameCounter = 0;
	uint32_t destWidth;
	uint32_t destHeight;
	bool resizing = false;
	//void handleMouseMove(int32_t x, int32_t y);
	PFN_vkCreateDebugReportCallbackEXT vkCreateDebugReportCallback;
	PFN_vkDestroyDebugReportCallbackEXT vkDestroyDebugReportCallback;
	VkDebugReportCallbackEXT debugReportCallback;
	struct MultisampleTarget {
		struct {
			VkImage image;
			VkImageView view;
			VkDeviceMemory memory;
		} color;
		struct {
			VkImage image;
			VkImageView view;
			VkDeviceMemory memory;
		} depth;
	} multisampleTarget;
protected:
	VkInstance instance;
	VkPhysicalDevice physicalDevice;
	VkPhysicalDeviceProperties deviceProperties;
	VkPhysicalDeviceFeatures deviceFeatures;
	VkPhysicalDeviceMemoryProperties deviceMemoryProperties;
	VkDevice device;
	vks::VulkanDevice *vulkanDevice;
	VkQueue queue;
	VkFormat depthFormat;
	VkCommandPool cmdPool;
	VkRenderPass renderPass;
	std::vector<VkFramebuffer>frameBuffers;
	uint32_t currentBuffer = 0;
	VkDescriptorPool descriptorPool;
	VkPipelineCache pipelineCache;
	//VulkanSwapChain swapChain;
	std::string title = "Vulkan Example";
	std::string name = "vulkanExample";
	//void windowResize();
public: 
	static std::vector<const char*> args;
	// temporary
	PlumageConfig::PlumageConfiguration setter;
	PlumageConfig::PlumageConfiguration::Settings settings = setter.settings;
	PlumageConfig::PlumageConfiguration::FilePath filePath = setter.filePath;
	
	uint32_t selectedPhysicalDeviceIndex = 0;
	bool prepared = false;
	
	float frameTimer = 1.0f;
	Camera camera;
	glm::vec2 mousePos;
	bool paused = false;
	uint32_t lastFPS = 0;

	VkFormat colorFormat = VK_FORMAT_R8G8B8A8_SRGB;
	uint32_t queueFamilyIndex;
	uint32_t renderingFrameIndex = 3;

	struct Signal
	{
		bool imageSequenceOutputComplete = false;
		bool imageSequenceToVideoComplete = false;

	}signal;

	
	/*
	struct FilePath
	{	//model path
		std::string glTFModelFilePath = getAssetPath() + "models/DamagedHelmet/DamagedHelmet.gltf";
		std::string modelVertShaderPath = getAssetPath() + "buster_drone/shaders/glsl/mesh.vert.spv";
		std::string modelFragShaderPath = getAssetPath() + "buster_drone/shaders/glsl/mesh.frag.spv";

		//ui
		std::string uiVertShaderPath = getAssetPath() + "shaders/ui.vert.spv";
		std::string uiFragShaderPath = getAssetPath() + "shaders/ui.frag.spv";

		// skybox path
		std::string skyboxModleFilePath = getAssetPath() + "models/cube.gltf";
		std::string skyboxVertShaderPath = getAssetPath() + "shaders/skybox.vert.spv";
		std::string skyboxFragShaderPath = getAssetPath() + "shaders/skybox.frag.spv";

		std::string iblTexturesFilePath = getAssetPath() + "textures/hdr/gcanyon_cube.ktx";
		//tonemapping
		std::string tonemappingVertShaderPath = getAssetPath() + "buster_drone/shaders/glsl/genbrdflut.vert.spv";
		std::string tonemappingEnableFragShaderPath = getAssetPath() + "buster_drone/shaders/glsl/tonemapping_enable.frag.spv";
		std::string tonemappingDisableFragShaderPath = getAssetPath() + "buster_drone/shaders/glsl/tonemapping_disable.frag.spv";


		//  cube map
		std::string irradianceFragShaderPath = getAssetPath() + "shaders/irradiancecube.frag.spv";

		std::string filterVertShaderPath = getAssetPath() + "shaders/filtercube.vert.spv";

		std::string prefilterEnvmapFragShaderPath = getAssetPath() + "shaders/prefilterenvmap.frag.spv";
		//brdf cube map
		std::string brdfVertShaderPath = getAssetPath() + "shaders/genbrdflut.vert.spv";
		std::string brdfFragShaderPath = getAssetPath() + "shaders/genbrdflut.frag.spv";
		// environment map texture
		std::string envMapFilePath = getAssetPath() + "environments/metro_noord_4k_hdr16f_cube.ktx";
		std::string emptyEnvmapFilePath = getAssetPath() + "textures/empty.ktx";
		// pbr shader
		std::string pbrVertShaderPath = getAssetPath() + "shaders/pbr.vert.spv";
		std::string pbrFragShaderPath = getAssetPath() + "shaders/pbr_khr.frag.spv";

		//ttf file path
		std::string ttfFilePath = getAssetPath() + "/data/Roboto-Medium.ttf";

		// output file path

		std::string imageOutputPath = getAssetPath() + "output/imageSequence";
		std::string videoOutputPath = getAssetPath() + "output/video";
		std::string totalImageOutputPath;
		std::string deviceSpecFilePath;

		// script file path
		std::string image2videoBatFilePath = getAssetPath() + "script/image2video.bat";
		std::string image2videoShFilePath = getAssetPath() + "script/image2video.sh";

	} filePath;
	*/
	struct DepthStencil {
		VkImage image;
		VkDeviceMemory mem;
		VkImageView view;
	} depthStencil;

	struct ColorAttachment {
		VkImage image;
		VkDeviceMemory memory;
		VkImageView view;
	} colorAttachment;

	struct GamePadState {
		glm::vec2 axisLeft = glm::vec2(0.0f);
		glm::vec2 axisRight = glm::vec2(0.0f);
	} gamePadState;

	struct MouseButtons {
		bool left = false;
		bool right = false;
		bool middle = false;
	} mouseButtons;

	// OS specific 


	VulkanExampleBase();
	virtual ~VulkanExampleBase();
	
	void initVulkan();

	virtual VkResult createInstance(bool enableValidation);
	virtual void render() = 0;
	//virtual void windowResized();
	virtual void setupFrameBuffer();
	virtual void prepare();
	virtual void fileDropped(std::string filename);

	void initSwapchain();
	void setupSwapChain();

	void renderLoop();
	void renderFrame();
};