/******************************************************************************
 * This program simply copies one file to another, line by line.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

#undef NDEBUG

#include "Utils.hpp"
#include <clocale>
#include <codecvt>
#include <fstream>
#include <iostream>
#include <string>

std::locale utf8loc(std::locale(), new std::codecvt_utf8<wchar_t>);
using namespace Utils;
using namespace std;

void copy_text_file(wstring from_filespec, wstring to_filespec) {
	wifstream ifh(filesystem::path(from_filespec).c_str());
	wofstream ofh(filesystem::path(to_filespec).c_str());
	if (!ifh.good()) {
		throw ios_base::failure(Utils::wchar_to_UTF8(L"Problem opening input file!"));
	}
	if (!ofh.good()) {
		throw ios_base::failure(Utils::wchar_to_UTF8(L"Problem opening output file!"));
	}
	ifh.imbue(utf8loc);
	ofh.imbue(utf8loc);
	wstring line;
	while (getline(ifh, line)) {
		ofh << line << endl;
	}
	ifh.close();
	ofh.close();
}

int main(int argc, char **argv) {
	setlocale(LC_ALL, "en_US.UTF-8");
	wcout.imbue(utf8loc);
	wcin.imbue(utf8loc);

	if (argc != 3) {
		wcout << L"Syntax: " << Utils::UTF8_to_wstring(argv[0]) << L" {fromFilespec} {toFilespec}" << endl;
		exit(1);
	}
	wstring from_filespec = Utils::UTF8_to_wstring(argv[1]);
	wstring to_filespec = Utils::UTF8_to_wstring(argv[2]);
	try {
		copy_text_file(from_filespec, to_filespec);
	} catch (ios_base::failure ex) {
		wcout << L"Error: " << Utils::exceptionMessage<wchar_t>(ex) << endl;
	}
	return 0;
}