/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2023, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

#include <mrpt/gui/CDisplayWindow.h>
#include <mrpt/system/CTimeLogger.h>
#include <mrpt/vision/chessboard_camera_calib.h>
#include <mrpt/vision/chessboard_find_corners.h>

#include <iostream>

using namespace std;
using namespace mrpt;
using namespace mrpt::img;
using namespace mrpt::vision;
using namespace mrpt::system;
using namespace mrpt::gui;

#include <mrpt/examples_config.h>
std::string myDataDir =
	MRPT_EXAMPLES_BASE_DIRECTORY + string("vision_multiple_checkerboards/");

// ------------------------------------------------------
//				TestMultipleCheckerboard
// ------------------------------------------------------
void TestMultipleCheckerboard(
	const std::string& img_filename, const unsigned int checkerboard_size_x,
	const unsigned int checkerboard_size_y)
{
	CTimeLogger timlog;

	// Load img:
	CImage img;
	if (!img.loadFromFile(img_filename))
		throw std::runtime_error("Can't load image!");

	// Detect multiple-checkerboards:
	vector<vector<TPixelCoordf>> listCornerCoords;

	timlog.enter("findMultipleChessboardsCorners");

	mrpt::vision::findMultipleChessboardsCorners(
		img, listCornerCoords, checkerboard_size_x, checkerboard_size_y);

	timlog.leave("findMultipleChessboardsCorners");

	cout << "Number of checkerboards detected: " << listCornerCoords.size()
		 << endl;

	// Draw:
	CImage img_detect;
	img.colorImage(img_detect);
	for (size_t i = 0; i < listCornerCoords.size(); i++)
		img_detect.drawChessboardCorners(
			listCornerCoords[i], checkerboard_size_x, checkerboard_size_y);

	// Show results:
	CDisplayWindow win1("Detected checkerboards ");
	win1.showImage(img_detect);

	timlog.dumpAllStats();
	timlog.clear();

	// wait till user closes any window:
	win1.waitForKey();
}

// ------------------------------------------------------
//						MAIN
// ------------------------------------------------------
int main(int argc, char** argv)
{
	try
	{
		std::string sFile = myDataDir + string("test_3_checkerboards_5x4.jpg");
		unsigned int checkerboard_size_x = 5;
		unsigned int checkerboard_size_y = 4;

		if (argc == 4)
		{
			sFile = std::string(argv[1]);
			checkerboard_size_x = atoi(argv[2]);
			checkerboard_size_y = atoi(argv[3]);
		}
		else if (argc != 1)
		{
			std::cerr << "Usage: " << argv[0] << " [IMAGE_FILE NX NY]\n";
			return 1;
		}

		TestMultipleCheckerboard(
			sFile, checkerboard_size_x, checkerboard_size_y);
		return 0;
	}
	catch (const std::exception& e)
	{
		std::cerr << "MRPT error: " << mrpt::exception_to_str(e) << std::endl;
		return -1;
	}
}
