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

#pragma once

class Spaceship
{
private:
	std::list<Bullet*> bullets;
	float lastShootTime = 0.f;
	float shootInterval = 0.3f;
	ParticleSystem* leftParticle;
	ParticleSystem* rightParticle;

	// 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(0.02f));
	}

	void setPerticlesParameters(float speed, float generationInterval) {
		leftParticle->speed = speed;
		leftParticle->generationInterval = generationInterval;
		rightParticle->speed = speed;
		rightParticle->generationInterval = generationInterval;
	}

	void processInput(GLFWwindow* window, float deltaTime, float time) {
		static bool mouseButtonCallbackSet = false;
		if (!mouseButtonCallbackSet) {
			
		}
		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;

		int w = glfwGetKey(window, GLFW_KEY_W);
		int s = glfwGetKey(window, GLFW_KEY_S);

		if (w == GLFW_PRESS) {
			if (glfwGetKey(window, GLFW_KEY_LEFT_SHIFT) == GLFW_PRESS) {
				moveSpeed *= 2;
				setPerticlesParameters(200.f, 0.00005f);
			}
			else {
				setPerticlesParameters(100.f, 0.0001f);
			}
		}
		else {
			setPerticlesParameters(50.f, 0.0002f);
		}

		

		if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) {
			glfwSetWindowShouldClose(window, true);
		}
		if (w == GLFW_PRESS)
			spaceshipPos += spaceshipDir * moveSpeed;
		if (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));
		if (glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS)
			requestShoot(time);

		cameraPos = spaceshipPos - 1.f * spaceshipDir + glm::vec3(0, 1, 0) * 0.2f;
		cameraDir = spaceshipDir;
		glm::vec3 perpendicularVector = 0.04f * glm::normalize(glm::cross(spaceshipDir, glm::vec3(0.0f, 1.0f, 0.0f)));
		if (leftParticle != nullptr && rightParticle != nullptr) {
			leftParticle->sourcePosition = spaceshipPos + perpendicularVector - (0.25f * spaceshipDir);
			rightParticle->sourcePosition = spaceshipPos - perpendicularVector - (0.25f * spaceshipDir);
			leftParticle->sourceDirection = -spaceshipDir;
			rightParticle->sourceDirection = -spaceshipDir;
		}

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

	void renderParticles(GLuint program, glm::mat4 view, glm::mat4 projection, float time) {
		if (leftParticle != nullptr && rightParticle != nullptr) {
			leftParticle->drawParticles(program, view, projection, time);
			rightParticle->drawParticles(program, view, projection, time);
		}
	}

	void createParticles() {
		if (leftParticle != nullptr && rightParticle != nullptr) {
			delete leftParticle;
			delete rightParticle;
		}

		leftParticle = new ParticleSystem();
		rightParticle = new ParticleSystem();
	}

	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;
	}

	void renderBullets(float time, GLuint program) {
		for (auto it = bullets.begin(); it != bullets.end();) {
			Bullet* bullet = *it;

			if (bullet->shouldBeDestroyed(time, program)) {
				delete bullet;
				it = bullets.erase(it);
			}
			else {
				it++;
			}
		}
	}

	void requestShoot(float time) {
		if (canShoot(time)) {
			shoot(time);
		}
	}

	bool canShoot(float time) {
		return lastShootTime == 0 || time - lastShootTime > shootInterval;
	}

	void shoot(float time) {
		glm::vec3 perpendicularVector = 0.25f * glm::normalize(glm::cross(cameraDir, glm::vec3(0.0f, 1.0f, 0.0f)));
		bullets.push_back(Bullet::createSimpleBullet(cameraDir, spaceshipPos - perpendicularVector, time));
		bullets.push_back(Bullet::createSimpleBullet(cameraDir, spaceshipPos + perpendicularVector, time));
		lastShootTime = time;
	}
};