/********************************************************
 *  ██████╗  ██████╗████████╗██╗
 * ██╔════╝ ██╔════╝╚══██╔══╝██║
 * ██║  ███╗██║        ██║   ██║
 * ██║   ██║██║        ██║   ██║
 * ╚██████╔╝╚██████╗   ██║   ███████╗
 *  ╚═════╝  ╚═════╝   ╚═╝   ╚══════╝
 * Geophysical Computational Tools & Library (GCTL)
 *
 * Copyright (c) 2022  Yi Zhang (yizhang-geo@zju.edu.cn)
 *
 * GCTL is distributed under a dual licensing scheme. You can redistribute 
 * it and/or modify it under the terms of the GNU Lesser General Public 
 * License as published by the Free Software Foundation, either version 2 
 * of the License, or (at your option) any later version. You should have 
 * received a copy of the GNU Lesser General Public License along with this 
 * program. If not, see <http://www.gnu.org/licenses/>.
 * 
 * If the terms and conditions of the LGPL v.2. would prevent you from using 
 * the GCTL, please consider the option to obtain a commercial license for a 
 * fee. These licenses are offered by the GCTL's original author. As a rule, 
 * licenses are provided "as-is", unlimited in time for a one time fee. Please 
 * send corresponding requests to: yizhang-geo@zju.edu.cn. Please do not forget 
 * to include some description of your company and the realm of its activities. 
 * Also add information on how to contact you by electronic and paper mail.
 ******************************************************/

#include "gctl/io.h"
#include "gctl/utility.h"

int main(int argc, char *argv[]) try
{
	gctl::flags_parser fp;
	fp.set_proname("txtinfo");
	fp.set_proinfo("Display lines from a text file that starts with a given symbol. \
This program is a toolkit of the GCTL package. The GCTL comes with ABSOLUTE NO WARRANTY. \
Please see instructions or contact the author for more information.");
	fp.add_opt('i', "input", required_argument, NULL, "Input file name.", "<filename>", true);
	fp.add_opt('s', "symbol", required_argument, NULL, "Annotation symbol. The default is '#'.", "<symbol>", false);
	fp.add_opt('h', "help", no_argument, NULL, "Show help information.", 0, false);
	fp.configure(argc, argv);

	if(argc == 1 || fp.set_opt('h'))
	{
		fp.show_help_page();
		return 0;
	}

	std::string in_name, annote_symbol;
	fp.get_argv({'i', 's'}, {&in_name, &annote_symbol});
	if (annote_symbol == "NULL") annote_symbol = "#";

	// 查看是否通过强制参数检查
	if (!fp.pass_mandatory()) return 0;

	std::ifstream infile;
	gctl::open_infile(infile, in_name, "");

	std::string tmp_line;
	while(getline(infile, tmp_line))
	{
		if (tmp_line[0] == annote_symbol[0])
		{
			std::cout << tmp_line << std::endl;
		}
	}
	infile.close();
	return 0;
}
catch(std::exception &e)
{
	GCTL_ShowWhatError(e.what(), GCTL_ERROR_ERROR, 0, 0, 0);
}