#include "GUIMouse.h"

#include "application.h"

namespace GUIMouse
{
	Vector2		position		{0, 0};
	Vector2		delta			{0, 0};
	Vector2		slowDelta		{0, 0};
	Vector2		wheel			{0, 0};
	ButtonState	buttons[3]		{ButtonState::Released, ButtonState::Released, ButtonState::Released};
	Gesture		gesture			{};

	Vector2		slowAccum		{0, 0};

	void ReceiveMouseUpEvent(const Button button)
	{
		buttons[button] = ButtonState::Up;
		Application::NeedsUpdate();
	}

	void ReceiveMouseDownEvent(const Button button)
	{
		buttons[button] = ButtonState::Down;
		Application::NeedsUpdate();
	}

	void ReceiveMouseMoveEvent(const float x, const float y)
	{
		delta = {x-position.x, y-position.y};
		slowAccum += delta * 0.2f;
		if (slowAccum.x >= 1 or slowAccum.x <= -1) {
			slowDelta.x = int(slowAccum.x);
			slowAccum.x = slowAccum.x - int(slowAccum.x);
		}
		if (slowAccum.y >= 1 or slowAccum.y <= -1) {
			slowDelta.y = int(slowAccum.y);
			slowAccum.y = slowAccum.y - int(slowAccum.y);
		}
		position = Vector2(x, y);
		Application::NeedsUpdate();
	}

	void ReceiveMouseWheelEvent(const float x, const float y)
	{
		wheel = Vector2(x, y);
		Application::NeedsUpdate();
	}

	void ReceiveMultigestureEvent(const float theta, const float dist, const int numFingers)
	{
		gesture.theta = theta;
		gesture.dist = dist;
		gesture.numFingers = numFingers;
		Application::NeedsUpdate();
	}

	void Reset()
	{
		for (int i = 0; i < 3; i++) {
			if (buttons[i] == ButtonState::Down) {
				buttons[i] = ButtonState::Pressed;
			} else if (buttons[i] == ButtonState::Up) {
				buttons[i] = ButtonState::Released;
			}
		}
		wheel = {0,0};
		delta = {0,0};
		slowDelta = {0,0};
		gesture.theta = gesture.dist = gesture.numFingers = 0;
	}
}