#include "ModelWorld.h"
#include <RenderingSystem.h>

ModelWorld::ModelWorld()
{
	light.lightDirection = glm::normalize(glm::vec3((cos(lightPitch) * cos(lightYaw)), (sin(lightPitch)), (cos(lightPitch) * sin(lightYaw))));
	light.radiance = 3.f * lightColor;
	RenderingSystem::instance().exposure = 0.45f;
	camera.Position = { 0,5,10 };

	model = std::make_shared<Actor>("Models/David_Brown_25D_tractor_SF/David_Brown_25D_tractor_SF.obj");
	model->setPosition({ 0,0,0 });
	model->setScale(glm::vec3(0.5));
	addActor(model);
}

void ModelWorld::cursorPosCallback(GLFWwindow* window, double xpos, double ypos)
{
	static bool firstMouse = true;
	static float lastX;
	static float lastY;

	float xoffset = xpos - lastX;
	float yoffset = lastY - ypos;

	lastX = xpos;
	lastY = ypos;

	if (firstMouse)
	{
		firstMouse = false;
		return;
	}

	if (glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) == GLFW_PRESS)
		camera.processMouseMovement(xoffset, yoffset);

	if (glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS)
	{
		float speed = 0.2f;
		model->setRotaion(glm::rotate(glm::quat(1, 0, 0, 0),
			glm::radians(glm::length(glm::vec2(xoffset, yoffset)) * speed), glm::vec3(glm::vec2(-yoffset, xoffset), 0.0)) * model->getRotation());
	}
}

void ModelWorld::scrollCallback(GLFWwindow* window, double xoffset, double yoffset)
{
	camera.processMouseScroll(yoffset);
}

void ModelWorld::processInput(GLFWwindow* window, float deltaTime)
{
	if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
		camera.processKeyboard(FORWARD, deltaTime);
	if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
		camera.processKeyboard(BACKWARD, deltaTime);
	if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
		camera.processKeyboard(LEFT, deltaTime);
	if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
		camera.processKeyboard(RIGHT, deltaTime);
	if (glfwGetKey(window, GLFW_KEY_SPACE) == GLFW_PRESS)
		camera.processKeyboard(UP, deltaTime);
	if (glfwGetKey(window, GLFW_KEY_LEFT_SHIFT) == GLFW_PRESS)
		camera.processKeyboard(DOWN, deltaTime);

	float speed = 10;
	float d = speed * deltaTime;
	if (glfwGetKey(window, GLFW_KEY_UP) == GLFW_PRESS)
		model->setPosition(model->getPosition() + glm::vec3(0, 0, -d));
	if (glfwGetKey(window, GLFW_KEY_DOWN) == GLFW_PRESS)
		model->setPosition(model->getPosition() + glm::vec3(0, 0, d));
	if (glfwGetKey(window, GLFW_KEY_LEFT) == GLFW_PRESS)
		model->setPosition(model->getPosition() + glm::vec3(-d, 0, 0));
	if (glfwGetKey(window, GLFW_KEY_RIGHT) == GLFW_PRESS)
		model->setPosition(model->getPosition() + glm::vec3(d, 0, 0));
}