/*
 * Copyright (c) 2010-2019 Belledonne Communications SARL.
 *
 * This file is part of Liblinphone.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "media-encryption.h"

using namespace std;

class MediaEncryptionResponse : public Response {
public:
	MediaEncryptionResponse(LinphoneCore *core);
};

MediaEncryptionResponse::MediaEncryptionResponse(LinphoneCore *core) : Response() {
	LinphoneMediaEncryption encryption = linphone_core_get_media_encryption(core);
	ostringstream ost;
	ost << "Encryption: ";
	switch (encryption) {
		case LinphoneMediaEncryptionNone:
			ost << "none\n";
			break;
		case LinphoneMediaEncryptionSRTP:
			ost << "srtp\n";
			break;
		case LinphoneMediaEncryptionZRTP:
			ost << "zrtp\n";
			break;
		case LinphoneMediaEncryptionDTLS:
			ost << "DTLS\n";
			break;
	}
	setBody(ost.str());
}

MediaEncryptionCommand::MediaEncryptionCommand() :
		DaemonCommand("media-encryption", "media-encryption [none|srtp|zrtp]",
				"Set the media encryption policy if a parameter is given, otherwise return the media encrytion in use.") {
	addExample(make_unique<DaemonCommandExample>("media-encryption none",
						"Status: Ok\n\n"
						"Encryption: none"));
	addExample(make_unique<DaemonCommandExample>("media-encryption srtp",
						"Status: Ok\n\n"
						"Encryption: srtp"));
	addExample(make_unique<DaemonCommandExample>("media-encryption",
						"Status: Ok\n\n"
						"Encryption: srtp"));
}

void MediaEncryptionCommand::exec(Daemon *app, const string& args) {
	string encryption_str;
	istringstream ist(args);
	ist >> encryption_str;
	if (ist.eof() && (encryption_str.length() == 0)) {
		app->sendResponse(MediaEncryptionResponse(app->getCore()));
		return;
	}
	if (ist.fail()) {
		app->sendResponse(Response("Incorrect parameter.", Response::Error));
		return;
	}
	LinphoneMediaEncryption encryption;
	if (encryption_str.compare("none") == 0) {
		encryption = LinphoneMediaEncryptionNone;
	} else if (encryption_str.compare("srtp") == 0) {
		encryption = LinphoneMediaEncryptionSRTP;
	} else if (encryption_str.compare("zrtp") == 0) {
		encryption = LinphoneMediaEncryptionZRTP;
	} else {
		app->sendResponse(Response("Incorrect parameter.", Response::Error));
		return;
	}
	if (linphone_core_set_media_encryption(app->getCore(), encryption) == 0) {
		app->sendResponse(MediaEncryptionResponse(app->getCore()));
	}else{
		app->sendResponse(Response("Unsupported media encryption", Response::Error));
	}
}
