#include "glm.hpp"
#include "ext.hpp"
#include <GLFW/glfw3.h>

#pragma once
class Spaceship
{
private:
	// Prywatny konstruktor, aby zapobiec zewnętrznemu tworzeniu instancji
	Spaceship() {}

	// Prywatny destruktor, aby zapobiec przypadkowemu usuwaniu instancji
	~Spaceship() {}


public:

	static Spaceship* getInstance()
	{
		static Spaceship instance; // Jedna i jedyna instancja
		return &instance;
	}

	glm::vec3 color = glm::vec3(0.3, 0.3, 0.5);
	float roughness = 0.2;
	float metallic = 1.0;

	glm::vec3 spaceshipPos = glm::vec3(0.065808f, 1.250000f, -2.189549f);
	glm::vec3 spaceshipDir = glm::vec3(-0.490263f, 0.000000f, 0.871578f);

	glm::vec3 spotlightPos = glm::vec3(0, 0, 0);
	glm::vec3 spotlightConeDir = glm::vec3(0, 0, 0);
	glm::vec3 spotlightColor = glm::vec3(0.4, 0.4, 0.9) * 3;
	float spotlightPhi = 3.14 / 4;

	glm::vec3 cameraPos = glm::vec3(0.479490f, 1.250000f, -2.124680f);
	glm::vec3 cameraDir = glm::vec3(-0.354510f, 0.000000f, 0.935054f);

	glm::mat4 calculateModelMatrix() {
		glm::vec3 spaceshipSide = glm::normalize(glm::cross(spaceshipDir, glm::vec3(0.f, 1.f, 0.f)));
		glm::vec3 spaceshipUp = glm::normalize(glm::cross(spaceshipSide, spaceshipDir));
		glm::mat4 specshipCameraRotrationMatrix = glm::mat4({
			spaceshipSide.x,spaceshipSide.y,spaceshipSide.z,0,
			spaceshipUp.x,spaceshipUp.y,spaceshipUp.z ,0,
			-spaceshipDir.x,-spaceshipDir.y,-spaceshipDir.z,0,
			0.,0.,0.,1.,
			});

		return glm::translate(spaceshipPos) * specshipCameraRotrationMatrix * glm::eulerAngleY(glm::pi<float>()) * glm::scale(glm::vec3(0.03f));
	}

	void processInput(GLFWwindow* window, float deltaTime) {
		glm::vec3 spaceshipSide = glm::normalize(glm::cross(spaceshipDir, glm::vec3(0.f, 1.f, 0.f)));
		glm::vec3 spaceshipUp = glm::vec3(0.f, 1.f, 0.f);
		float angleSpeed = 0.05f * deltaTime * 60;
		float moveSpeed = 0.05f * deltaTime * 60;

		if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) {
			glfwSetWindowShouldClose(window, true);
		}
		if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
			spaceshipPos += spaceshipDir * moveSpeed;
		if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
			spaceshipPos -= spaceshipDir * moveSpeed;
		if (glfwGetKey(window, GLFW_KEY_X) == GLFW_PRESS)
			spaceshipPos += spaceshipSide * moveSpeed;
		if (glfwGetKey(window, GLFW_KEY_Z) == GLFW_PRESS)
			spaceshipPos -= spaceshipSide * moveSpeed;
		if (glfwGetKey(window, GLFW_KEY_Q) == GLFW_PRESS)
			spaceshipPos += spaceshipUp * moveSpeed;
		if (glfwGetKey(window, GLFW_KEY_E) == GLFW_PRESS)
			spaceshipPos -= spaceshipUp * moveSpeed;
		if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
			spaceshipDir = glm::vec3(glm::eulerAngleY(angleSpeed) * glm::vec4(spaceshipDir, 0));
		if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
			spaceshipDir = glm::vec3(glm::eulerAngleY(-angleSpeed) * glm::vec4(spaceshipDir, 0));

		cameraPos = spaceshipPos - 0.5 * spaceshipDir + glm::vec3(0, 1, 0) * 0.2f;
		cameraDir = spaceshipDir;

		spotlightPos = spaceshipPos + 0.2 * spaceshipDir;
		spotlightConeDir = spaceshipDir;
	}

	glm::mat4 createCameraMatrix()
	{
		glm::vec3 cameraSide = glm::normalize(glm::cross(cameraDir, glm::vec3(0.f, 1.f, 0.f)));
		glm::vec3 cameraUp = glm::normalize(glm::cross(cameraSide, cameraDir));
		glm::mat4 cameraRotrationMatrix = glm::mat4({
			cameraSide.x,cameraSide.y,cameraSide.z,0,
			cameraUp.x,cameraUp.y,cameraUp.z ,0,
			-cameraDir.x,-cameraDir.y,-cameraDir.z,0,
			0.,0.,0.,1.,
			});
		cameraRotrationMatrix = glm::transpose(cameraRotrationMatrix);
		glm::mat4 cameraMatrix = cameraRotrationMatrix * glm::translate(-cameraPos);

		return cameraMatrix;
	}
};