#include "IMGUIControls.h"

#include "Engine.h"
#include "ControllerBase.h"
#include "ViewBase.h"
#include <GL/gl.h>
#include "DrawingsGL.h"
#include "keytable.h"

Engine::ControllerBase *controller = NULL;
Engine::ViewBase *view = NULL;

namespace Engine {
namespace GUI {

/** \brief Checks whether the mouse is in the given rectangle */
bool regionhit (int x, int y, int w, int h) {
	controller = EngineGetController();
	assert (controller);

	int mouse_pos[2];

	controller->GetMouseScreenPosition(mouse_pos);

	if (mouse_pos[0] < x ||
			mouse_pos[1] < y ||
			mouse_pos[0] >= x + w ||
			mouse_pos[1] >= y + h)
		return false;
	return true;
}

void Label (int id, const char* caption, int x, int y) {
	if (caption != NULL) {
		float width, height;
		view = EngineGetView ();
		assert (view);

		glColor3f (1., 1., 1.);
		view->DrawGLStringMeasure(caption, &width, &height);
		view->DrawGLString(x , y + height * 0.5, caption);
	}
}

/** \brief Draws a button at the given position
 *
 * \returns true if it was clicked
 *
 */
bool Button (int id, const char* caption, int x, int y, int w, int h) {
	controller = EngineGetController();
	assert (controller);

	// Check for hotness
	if (regionhit (x, y, w, h)) {
		controller->uistate.hotitem = id;
		if (controller->uistate.activeitem == 0 
				&& controller->GetButtonState(MouseButtonLeft))
			controller->uistate.activeitem = id;
	}

	// Render
	glColor3f (0.2, 0.2, 0.2);
	DrawRect2D (x + 4, y + 4, w, h);

	if (controller->uistate.hotitem == id) {
		if (controller->uistate.activeitem == id) {
			glColor3f (0.8, 0.8, 0.8);
			DrawRect2D (x, y, w, h);
		} else {
			glColor3f (0.7, 0.7, 0.7);
			DrawRect2D (x, y, w, h);
		}
	} else {
		glColor3f (0.4, 0.4, 0.4);
		DrawRect2D (x, y, w, h);
	}

	// Caption
	if (caption != NULL) {
		float width, height;
		view = EngineGetView ();
		assert (view);

		glColor3f (1., 1., 1.);
		view->DrawGLStringMeasure(caption, &width, &height);
		view->DrawGLString(x + w * 0.5 - width * 0.5, y + h * 0.5 - height * 0.5, caption);
	}

	// Logic
	if (controller->GetButtonState(MouseButtonLeft) == false
			&& controller->uistate.hotitem == id
			&& controller->uistate.activeitem == id)
		return true;

	return false;
}

};
};