#include "Application.h"

#include <Windows.h>
#include <glew/glew.h>
#include <gl/GL.h>

#pragma comment(lib, "opengl32.lib")

Application::Application(const char* class_name, HINSTANCE h_instance)
	: m_window(class_name, h_instance), m_input_manager(&m_window.get_input_manager()), m_client_size(1280, 720)
{
}


Application::~Application()
{
	HGLRC h_glrc = m_window.get_h_glrc();
	if (h_glrc != nullptr) {
		// Unset the current OpenGL Rendering Context and Device
		wglMakeCurrent(NULL, NULL);
		wglDeleteContext(h_glrc);
		m_window.set_h_glrc(nullptr);
	}
}

int Application::run()
{
	if (!base_init()) return 1;
	
	MessageResponse resp(UNSET);
	while (resp != QUIT_MESSAGE) {
		// Handle all messages
		while ((resp = m_window.handle_message()) == HANDLED_MESSAGE) {}
		float delta_time = m_fps.mark();
		clock_t clock = m_fps.get_clock();
		update(delta_time, clock);
		render();
		m_window.swap();
	}
	
	return 0;
}

void Application::close()
{
}

bool Application::base_init()
{
	if (!m_window.register_class()) return false;
	if (!m_window.create_window("OpenGLEngine", -1, -1, m_client_size.x, m_client_size.y)) return false;

	// Initialize window with OpenGL (May want to move this into MyApplication to allow application customization)
	// https://www.khronos.org/opengl/wiki/Creating_an_OpenGL_Context_(WGL)

	HDC device_context = m_window.get_h_dc();

	// PIXELFORMATDESCRIPTOR https://msdn.microsoft.com/en-us/library/cc231189.aspx
	PIXELFORMATDESCRIPTOR pfd;
	ZeroMemory(&pfd, sizeof(PIXELFORMATDESCRIPTOR));
	pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
	pfd.nVersion = 1;
	pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
	pfd.cColorBits = 32;
	pfd.cDepthBits = 24;
	pfd.cStencilBits = 8;
	pfd.iLayerType = PFD_MAIN_PLANE;

	int pixel_format = ChoosePixelFormat(device_context, &pfd);

	SetPixelFormat(device_context, pixel_format, &pfd);

	m_window.set_h_glrc(wglCreateContext(m_window.get_h_dc()));

	m_window.show(SW_NORMAL);
	m_fps.prepare();

	return init();
}

void Application::base_close()
{
	close();
}