// QT includes
#include <QCoreApplication>
#include <QImage>

// getoptPlusPLus includes
#include <getoptPlusPlus/getoptpp.h>

#include "protoserver/ProtoConnectionWrapper.h"
#include "X11Wrapper.h"
#include "HyperionConfig.h"

using namespace vlofgren;

// save the image as screenshot
void saveScreenshot(const char * filename, const Image<ColorRgb> & image)
{
	// store as PNG
	QImage pngImage((const uint8_t *) image.memptr(), image.width(), image.height(), 3*image.width(), QImage::Format_RGB888);
	pngImage.save(filename);
}

int main(int argc, char ** argv)
{
  std::cout
	<< "hyperion-x11:" << std::endl
	<< "\tversion   : " << HYPERION_VERSION_ID << std::endl
	<< "\tbuild time: " << __DATE__ << " " << __TIME__ << std::endl;

	QCoreApplication app(argc, argv);

	try
	{
		// create the option parser and initialize all parameters
		OptionsParser optionParser("X11 capture application for Hyperion");
		ParameterSet & parameters = optionParser.getParameters();

		IntParameter           & argFps             = parameters.add<IntParameter>          ('f', "framerate",        "Capture frame rate [default: 10]");
		SwitchParameter<>      & argXGetImage       = parameters.add<SwitchParameter<>>     ('x', "xgetimage",        "Use XGetImage instead of XRender");
		IntParameter           & argCropWidth       = parameters.add<IntParameter>          (0x0, "crop-width",       "Number of pixels to crop from the left and right sides of the picture before decimation [default: 0]");
		IntParameter           & argCropHeight      = parameters.add<IntParameter>          (0x0, "crop-height",      "Number of pixels to crop from the top and the bottom of the picture before decimation [default: 0]");
		IntParameter           & argCropLeft        = parameters.add<IntParameter>          (0x0, "crop-left",        "Number of pixels to crop from the left of the picture before decimation (overrides --crop-width)");
		IntParameter           & argCropRight       = parameters.add<IntParameter>          (0x0, "crop-right",       "Number of pixels to crop from the right of the picture before decimation (overrides --crop-width)");
		IntParameter           & argCropTop         = parameters.add<IntParameter>          (0x0, "crop-top",         "Number of pixels to crop from the top of the picture before decimation (overrides --crop-height)");
		IntParameter           & argCropBottom      = parameters.add<IntParameter>          (0x0, "crop-bottom",      "Number of pixels to crop from the bottom of the picture before decimation (overrides --crop-height)");
		IntParameter           & argSizeDecimation  = parameters.add<IntParameter>          ('s', "size-decimator",   "Decimation factor for the output size [default=8]");
		SwitchParameter<>      & argScreenshot      = parameters.add<SwitchParameter<>>     (0x0, "screenshot",       "Take a single screenshot, save it to file and quit");
		StringParameter        & argAddress         = parameters.add<StringParameter>       ('a', "address",          "Set the address of the hyperion server [default: 127.0.0.1:19445]");
		IntParameter           & argPriority        = parameters.add<IntParameter>          ('p', "priority",         "Use the provided priority channel (the lower the number, the higher the priority) [default: 800]");
		SwitchParameter<>      & argSkipReply       = parameters.add<SwitchParameter<>>     (0x0, "skip-reply",       "Do not receive and check reply messages from Hyperion");
		SwitchParameter<>      & argHelp            = parameters.add<SwitchParameter<>>     ('h', "help",             "Show this help message and exit");

		// set defaults
		argFps.setDefault(10);
		argCropWidth.setDefault(0);
		argCropHeight.setDefault(0);
		argSizeDecimation.setDefault(8);
		argAddress.setDefault("127.0.0.1:19445");
		argPriority.setDefault(800);

		// parse all options
		optionParser.parse(argc, const_cast<const char **>(argv));

		// check if we need to display the usage. exit if we do.
		if (argHelp.isSet())
		{
			optionParser.usage();
			return 0;
		}

		// cropping values if not defined
		if (!argCropLeft.isSet())   argCropLeft.setDefault(argCropWidth.getValue());
		if (!argCropRight.isSet())  argCropRight.setDefault(argCropWidth.getValue());
		if (!argCropTop.isSet())	argCropTop.setDefault(argCropHeight.getValue());
		if (!argCropBottom.isSet()) argCropBottom.setDefault(argCropHeight.getValue());

		// Create the X11 grabbing stuff
		int grabInterval = 1000 / argFps.getValue();
		bool useXGetImage = argXGetImage.isSet();
		X11Wrapper x11Wrapper(
					grabInterval,
					useXGetImage,
					argCropLeft.getValue(),
					argCropRight.getValue(),
					argCropTop.getValue(),
					argCropBottom.getValue(),
					argSizeDecimation.getValue(), // horizontal decimation
					argSizeDecimation.getValue()); // vertical decimation
	
	if (!x11Wrapper.displayInit())
	  return -1;

		if (argScreenshot.isSet())
		{
			// Capture a single screenshot and finish
			const Image<ColorRgb> & screenshot = x11Wrapper.getScreenshot();
			saveScreenshot("screenshot.png", screenshot);
		}
		else
		{
			// Create the Proto-connection with hyperiond
			ProtoConnectionWrapper protoWrapper(argAddress.getValue(), argPriority.getValue(), 1000, argSkipReply.isSet());

			// Connect the screen capturing to the proto processing
			QObject::connect(&x11Wrapper, SIGNAL(sig_screenshot(const Image<ColorRgb> &)), &protoWrapper, SLOT(receiveImage(Image<ColorRgb>)));

			// Start the capturing
			x11Wrapper.start();

			// Start the application
			app.exec();
		}
	}
	catch (const std::runtime_error & e)
	{
		// An error occured. Display error and quit
		std::cerr << e.what() << std::endl;
		return -1;
	}

	return 0;
}