#include "../include/cmdman.h"
#include "../include/global.h"

#include <iostream>

#define DEBUGPRINT(x) debugprintfunc(x)
//~ #define DEBUGPRINT(x) std::cerr << x
//~ #define DEBUGPRINT(x)

CmdMan::CmdMan(FileMan &fm, void (*dpf)(string)) : fileman(fm) {

	/* setup json stuff */
	Json::CharReaderBuilder rbuilder;
	wbuilder.settings_["indentation"] = "";
	reader = rbuilder.newCharReader();

	currentState = connectionpossible;

	/* initialize execute command map */
	execmap["help"] = &CmdMan::cmdHelp;
	execmap["status"] = &CmdMan::cmdStatus;
	execmap["disconnect"] = &CmdMan::cmdDisconnect;
	execmap["put"] = &CmdMan::cmdPut;
	execmap["get"] = &CmdMan::cmdGet;
	execmap["list"] = &CmdMan::cmdList;
	execmap["version"] = &CmdMan::cmdVersion;
	execmap["login"] = &CmdMan::cmdLogin;
	execmap["signup"] = &CmdMan::cmdSignup;
	execmap["putdata"] = &CmdMan::cmdPutdata;
	execmap["getdata"] = &CmdMan::cmdGetdata;
	execmap["listdata"] = &CmdMan::cmdListdata;
	execmap["head"] = &CmdMan::cmdHead;
	execmap["deletefile"] = &CmdMan::cmdDeletefile;
	execmap["deleteme"] = &CmdMan::cmdDeleteme;
	execmap["keyfile"] = &CmdMan::cmdKeyfile;
	execmap["closekey"] = &CmdMan::cmdClosekey;
	execmap["connect"] = &CmdMan::cmdConnect;
	execmap["exit"] = &CmdMan::cmdExit;

	/* initialize description map */
	helpmap["help"] = descHelp;
	helpmap["status"] = descStatus;
	helpmap["disconnect"] = descDisconnect;
	helpmap["put"] = descPut;
	helpmap["get"] = descGet;
	helpmap["list"] = descList;
	helpmap["head"] = descHead;
	helpmap["login"] = descLogin;
	helpmap["signup"] = descSignup;
	helpmap["deletefile"] = descDeletefile;
	helpmap["deleteme"] = descDeleteme;
	helpmap["keyfile"] = descKeyfile;
	helpmap["closekey"] = descClosekey;
	helpmap["connect"] = descConnect;
	helpmap["exit"] = descExit;

	/* initialize handle command map */
	handlemap["status"] = &CmdMan::handleStatus;
	handlemap["close"] = &CmdMan::handleClose;
	handlemap["put"] = &CmdMan::handlePut;
	handlemap["get"] = &CmdMan::handleGet;
	handlemap["putdata"] = &CmdMan::handlePutdata;
	handlemap["getdata"] = &CmdMan::handleGetdata;
	handlemap["list"] = &CmdMan::handleList;
	handlemap["version"] = &CmdMan::handleVersion;
	handlemap["login"] = &CmdMan::handleLogin;
	handlemap["signup"] = &CmdMan::handleSignup;
	handlemap["listdata"] = &CmdMan::handleListdata;
	handlemap["head"] = &CmdMan::handleHead;
	handlemap["deletefile"] = &CmdMan::handleDeletefile;
	handlemap["deleteme"] = &CmdMan::handleDeleteme;

	debugprintfunc = dpf;
}

CmdMan::~CmdMan() { delete reader; }

void CmdMan::stateSetConnectionOk() { currentState = versionpossible; }

CmdMan::CmdRet CmdMan::cmdHelp(vector<string> args) {
	CmdRet retval;
	Json::Value root, arr;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	map<string, string>::iterator it;
	root["command"] = "help";
	for (it = helpmap.begin(); it != helpmap.end(); it++) {
		arr.append(it->first + " - " + it->second);
	}
	root["names"] = arr;
	retval.type = print;
	retval.msg = root;
	return retval;
}

CmdMan::CmdRet CmdMan::cmdStatus(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;
	root["command"] = "status";
	retval.type = send;
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::cmdDisconnect(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;
	retval.type = send;
	if (currentState == loginpossible || currentState == disconnecttoexitearly) {
		// not logged in, send appropriate login message instead of normal close
		root["login"] = false;
		root["user"] = "";
		root["pass"] = "";
		root["cancel"] = true;
		retval.type |= close;
		if (currentState == disconnecttoexitearly) {
			retval.nextcommand = "exit";
		}
		currentState = connectionpossible;
	} else {
		root["command"] = "close";
	}
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::cmdPut(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;
	root["command"] = "put";

	if (args.size() < 1) {
		retval.type = error;
		root["accept"] = false;
		root["error"] = "not enough arguments, at least 1 argument required";
	} else {
		if (fileman.isPutting()) {
			retval.type = error;
			root["file"] = args[0];
			root["accept"] = false;
			root["error"] = "already putting file \"" + fileman.getPutName() + "\"";
		} else {
			bool opened = fileman.openPut(args[0]);
			if (opened) {
				root["file"] = fileman.getPutName();
				root["size"] = fileman.getPutSize();
				root["chunks"] = fileman.getPutChunks();
				retval.type = send;
			} else {
				retval.type = error;
				root["file"] = fileman.pathToFilename(args[0]);
				root["accept"] = false;
				root["error"] = "couldnt open local file \"" + args[0] + "\"";
			}
		}
	}

	retval.msg = root;
	return retval;
}

CmdMan::CmdRet CmdMan::cmdPutdata(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;

	root["command"] = "putdata";
	if (!fileman.isPutting()) {
		root["error"] = "Client cannot handle input (received command \"putdata\").";
		retval.type = error;
	} else {
		root["file"] = fileman.getPutName();
		root["cancel"] = false;
		root["data"] = fileman.readBase64();
		root["remaining"] = fileman.getPutRemainingChunks(); // number already decremented by readBase64
		retval.type = send;
	}
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::cmdGet(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;
	root["command"] = "get";

	if (args.size() < 1) {
		retval.type = error;
		root["accept"] = false;
		root["error"] = "not enough arguments, at least 1 argument required";
	} else {

		if (fileman.isGetting()) {
			retval.type = error;
			root["file"] = args[0];
			root["accept"] = false;
			root["error"] = "already getting file \"" + fileman.getGetName() + "\"";
		} else {
			bool opened = fileman.openGet(args[0]);
			root["file"] = fileman.getGetName();
			if (opened) {
				root["file"] = fileman.getGetName();
				retval.type = send;
			} else {
				root["file"] = fileman.pathToFilename(args[0]);
				root["accept"] = false;
				root["error"] = "local file \"" + args[0] + "\" already exists";
				retval.type = error;
			}
		}
	}

	retval.msg = root;
	return retval;
}

CmdMan::CmdRet CmdMan::cmdGetdata(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;

	root["command"] = "getdata";
	if (!fileman.isGetting()) {
		root["error"] = "Client cannot handle input (received command \"getdata\").";
		retval.type = error;
	} else {
		root["file"] = fileman.getGetName();
		root["chunk"] = fileman.getGetRemainingChunks();
		root["cancel"] = false;
		retval.type = send;
	}
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::cmdList(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;

	bool opened = fileman.openList();
	root["command"] = "list";
	if (opened) {
		retval.type = send;
	} else {
		retval.type = error;
		root["accept"] = false;
		root["names"] = "";
		root["error"] = "cannot list, already listing";
	}

	retval.msg = root;
	return retval;
}

CmdMan::CmdRet CmdMan::cmdListdata(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;
	if (!fileman.isListing()) {
		root["command"] = "list";
		root["error"] = "Client cannot handle input (received command \"listdata\").";
		retval.type = error;
	} else {
		root["command"] = "listdata";
		root["chunk"] = fileman.getListRemainingChunks();
		root["cancel"] = false;
		retval.type = send;
	}

	retval.msg = root;
	return retval;
}

CmdMan::CmdRet CmdMan::cmdHead(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;
	root["command"] = "head";

	if (args.size() < 1) {
		retval.type = error;
		root["accept"] = false;
		root["error"] = "not enough arguments, at least 1 argument required";
	} else {
		root["file"] = args[0];
		retval.type = send;
	}
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::cmdDeletefile(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;
	root["command"] = "deletefile";

	if (args.size() < 1) {
		retval.type = error;
		root["accept"] = false;
		root["error"] = "not enough arguments, at least 1 argument required";
	} else {
		root["file"] = args[0];
		retval.type = send;
	}
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::cmdConnect(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;

	root["command"] = "connect";

	if (args.size() < 1) {
		retval.type = error;
		root["error"] = "not enough arguments, at least 1 argument required";
	} else if (args.size() < 2) {
		retval.type = connect;
		root["address"] = args[0];
		root["port"] = 1234;
	} else {
		retval.type = connect;
		root["address"] = args[0];
		root["port"] = (unsigned int)stoul(args[1]);
	}
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::execute(string cmd, vector<string> args) {
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " using command \"" + cmd + "\" with arguments [ ");
	for (string s : args)
		DEBUGPRINT(s + " ");
	DEBUGPRINT("]");
	map<string, CmdRet (CmdMan::*)(vector<string>)>::iterator it = execmap.find(cmd);
	CmdRet retval;
	Json::Value root;
	root["command"] = cmd;
	if (it == execmap.end()) {
		retval.type = error;
		root["command"] = "error";
		root["error"] = string(__PRETTY_FUNCTION__) + " unknown command \"" + cmd + "\".\ntype help to list available commands.";
		retval.msg = root;
		return retval;
	} else if (!cmd.compare("help") || !cmd.compare("exit")) {
		// allow help and exit in all cases
	} else if (currentState == loginpossible || currentState == dologin || currentState == dosignup) {
		DEBUGPRINT("execute does login");
		DEBUGPRINT(string("comparison is ") +
		           std::to_string(cmd.compare("login") && cmd.compare("signup") && cmd.compare("disconnect") && cmd.compare("help")));
		if (cmd.compare("login") && cmd.compare("signup") && cmd.compare("disconnect") && cmd.compare("help")) {
			retval.type = error;
			root["command"] = "error";
			root["error"] = string("Not logged in. Available commands are limited to ") + "login" + ", " + "signup" + " and " + "disconnect" + "\n" +
			                "Use help for usage of these commands.";
			retval.msg = root;
			return retval;
		}
	} else if (currentState == versionpossible || currentState == doversion) {
		DEBUGPRINT("execute does version");
		DEBUGPRINT(string("comparison is ") + std::to_string(cmd.compare("version")));
		if (cmd.compare("version")) {
			retval.type = error;
			root["command"] = "error";
			root["error"] = string("Version not checked yet. No commands avalable.");
			retval.msg = root;
			return retval;
		}
	} else if (currentState == connectionpossible) {
		DEBUGPRINT("execute does connect");
		DEBUGPRINT(string("comparison is ") + std::to_string(cmd.compare("connect")));
		if (cmd.compare("version") && cmd.compare("connect")) {
			retval.type = error;
			root["command"] = "error";
			root["error"] = string("Not connected. Connect using \"connect ip [port]\".");
			retval.msg = root;
			return retval;
		}
	}
	return (this->*(execmap[cmd]))(args);
}

CmdMan::CmdRet CmdMan::cmdDeleteme(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;

	root["command"] = "deleteme";

	if (args.size() < 1) {
		retval.type = error;
		root["accept"] = false;
		root["error"] = "not enough arguments, at least 1 argument required";
	} else {
		retval.type = send;
		root["pass"] = args[0];
	}
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::cmdKeyfile(vector<string> args) {
	CmdRet retval;
	Json::Value root;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	root["command"] = "keyfile";
	if (args.size() < 1) {
		retval.type = error;
		root["accept"] = false;
		root["error"] = "not enough arguments, at least 1 argument required";
	} else {
		DEBUGPRINT(string(__PRETTY_FUNCTION__) + " haveargs");
		if (!fileman.openKey(args[0])) {
			DEBUGPRINT(string(__PRETTY_FUNCTION__) + " openkey fail");
			root["accept"] = false;
			root["file"] = args[0];
			root["error"] = string("couldnt open keyfile, openssl reports: ") + fileman.getOpensslError();
			retval.type = error;
		} else {
			DEBUGPRINT(string(__PRETTY_FUNCTION__) + " openkey good");
			root["accept"] = true;
			root["file"] = args[0];
			retval.type = print;
		}
	}
	retval.msg = root;
	return retval;
}

CmdMan::CmdRet CmdMan::cmdClosekey(vector<string> args) {
	CmdRet retval;
	Json::Value root;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	root["command"] = "closekey";
	if (!fileman.closeKey()) {
		root["accept"] = false;
		root["error"] = "couldnt close keyfile. ensure no put or get is running";
		retval.type = error;
	} else {
		root["accept"] = true;
		retval.type = print;
	}
	retval.msg = root;
	return retval;
}

CmdMan::CmdRet CmdMan::cmdExit(vector<string> args) {
	CmdRet retval;
	Json::Value root;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	root["command"] = "exit";
	if (currentState != connectionpossible) {
		// we are connected, disconnect first
		retval.nextcommand = "disconnect";
		if (currentState == loginpossible)
			currentState = disconnecttoexitearly;
		else
			currentState = disconnecttoexit;
		retval.type = none;
	} else {
		retval.type = exit;
	}
	retval.msg = root;
	return retval;
}

/* login and signup commands */
CmdMan::CmdRet CmdMan::cmdLogin(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;

	if (args.size() < 2) {
		retval.type = error;
		root["command"] = "login";
		root["accept"] = false;
		root["error"] = "not enough arguments, at least 2 argument required";
	} else {
		if (currentState == loginpossible) {
			currentState = dologin;
			root["user"] = args[0];
			root["pass"] = args[1];
			root["login"] = true;
			root["cancel"] = false;
			retval.type = send;
		} else {
			root["command"] = "login";
			root["error"] = "Login not possible, because you already requested a login "
			                "or you are logged in";
			root["accept"] = false;
			retval.type = error;
		}
	}

	retval.msg = root;
	return retval;
}

CmdMan::CmdRet CmdMan::cmdSignup(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;

	if (args.size() < 2) {
		retval.type = error;
		root["command"] = "signup";
		root["accept"] = false;
		root["error"] = "not enough arguments, at least 2 argument required";
	} else {
		if (currentState == loginpossible) {
			currentState = dosignup;
			root["user"] = args[0];
			root["pass"] = args[1];
			root["login"] = false;
			root["cancel"] = false;
			retval.type = send;
		} else {
			root["command"] = "signup";
			root["error"] = "Signup not possible, because you already requested a "
			                "login or you are logged in";
			root["accept"] = false;
			retval.type = error;
		}
	}

	retval.msg = root;
	return retval;
}

/* internal commands */
CmdMan::CmdRet CmdMan::cmdVersion(vector<string> args) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	Json::Value root;
	if (currentState == versionpossible) {
		root["major"] = protocolMajorVersion;
		root["minor"] = protocolMinorVersion;
		retval.type = send;
		currentState = doversion;
	} else {
		retval.type = error;
		root["command"] = "error";
		root["error"] = "Executing version command not possible. Type help to list available commands.";
	}
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::handle(Json::Value root) {
	CmdRet retval;
	Json::Value output;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	if (currentState == doversion)
		root["command"] = "version";
	else if (currentState == dosignup)
		root["command"] = "signup";
	else if (currentState == dologin)
		root["command"] = "login";
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " using json\n" + Json::writeString(wbuilder, root) + "\n");
	string retmsg;
	map<string, CmdRet (CmdMan::*)(Json::Value)>::iterator it = handlemap.find(root["command"].asString());

	if (it == handlemap.end()) {
		retval.type = error;
		output["command"] = "error";
		output["error"] = string(__PRETTY_FUNCTION__) + " unknown command \"" + root["command"].asString() + "\".\nEnsure code is implemented.";
		retval.msg = output;
		return retval;
	}
	return (this->*(handlemap[root["command"].asString()]))(root);
}

CmdMan::CmdRet CmdMan::handleStatus(Json::Value root) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	retval.type = print;
	retval.msg = root;

	return retval;
}

CmdMan::CmdRet CmdMan::handleClose(Json::Value root) {
	CmdRet retval;
	Json::Value output;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	output["command"] = "disconnect";
	output["accept"] = true;
	retval.type = close | print;
	retval.msg = output;

	if (currentState == disconnecttoexit) {
		retval.nextcommand = "exit";
	}
	currentState = connectionpossible;

	return retval;
}

CmdMan::CmdRet CmdMan::handlePut(Json::Value root) {
	CmdRet retval;
	Json::Value output;
	output["command"] = "put";
	output["file"] = fileman.getPutName();
	output["accept"] = false;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");

	if (!root["accept"].asBool()) {
		retval.type = error;
		output["error"] = "Server reports: " + root["error"].asString();
		fileman.cancelPut();
	} else if (!fileman.isPutting()) {
		retval.type = error;
		output["error"] = "Server responds to put message which was never sent.";
	} else if (root["file"].asString() != fileman.getPutName()) {
		retval.type = error;
		output["error"] = "Server reports filename " + root["file"].asString() + " but actual filename is " + fileman.getPutName();
		fileman.cancelPut();
	} else {
		output["accept"] = true;
		output["error"] = "";
		retval.type = print | send;
		retval.nextcommand = "putdata";
	}
	retval.msg = output;

	return retval;
}

CmdMan::CmdRet CmdMan::handlePutdata(Json::Value root) {
	CmdRet retval;
	Json::Value output;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	output["command"] = "putdata";
	output["file"] = fileman.getPutName();
	output["speed"] = 0.0f; // TODO
	output["cancel"] = true;

	if (root["cancel"].asBool()) {
		retval.type = error;
		output["error"] = "Server reports: " + root["error"].asString();
		fileman.cancelPut();
	} else if (!fileman.isPutting()) {
		retval.type = error;
		output["error"] = "Server responds to put message which was never sent.";
	} else if (root["received"].asInt() != fileman.getPutRemainingChunks()) {
		// the number of remaining chunks received from the daemon does not equal
		// the number stored at the client side
		retval.type = error;
		output["error"] = std::string("Server reports number of "
		                              "remaining chunks as ") +
		                  std::to_string(root["received"].asInt()) + " but actual number is " + std::to_string(fileman.getPutRemainingChunks());
		fileman.cancelPut();
	} else if (root["file"].asString() != fileman.getPutName()) {
		retval.type = error;
		output["error"] = "Server reports filename " + root["file"].asString() + " but actual filename is " + fileman.getPutName();
		fileman.cancelPut();
	} else {
		output["cancel"] = false;
		output["error"] = "";
		// sent successfully
		if (!root["received"].asInt()) {
			// everything sent
			retval.type = print;
			// TODO
			//~ retval.msg = "succesfully uploaded file " + fileman.getPutName();
			fileman.closePut();
		} else {
			retval.type = print | send;
			retval.nextcommand = "putdata";
		}
	}
	retval.msg = output;
	return retval;
}

CmdMan::CmdRet CmdMan::handleGet(Json::Value root) {
	CmdRet retval;
	Json::Value output;
	output["command"] = "get";
	output["file"] = fileman.getGetName();
	output["accept"] = false;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");

	if (!root["accept"].asBool()) {
		retval.type = error;
		output["error"] = "Server reports: " + root["error"].asString();
		fileman.cancelGet();
	} else if (!fileman.isGetting()) {
		retval.type = error;
		output["error"] = "Server responds to get message which was never sent.";
	} else if (root["file"].asString() != fileman.getGetName()) {
		retval.type = error;
		output["error"] = "Server reports filename " + root["file"].asString() + " but actual filename is " + fileman.getGetName();
		fileman.cancelGet();
	} else {
		fileman.setGetChunks(root["chunks"].asInt());
		output["accept"] = true;
		output["error"] = "";
		retval.type = print | send;
		retval.nextcommand = "getdata";
	}
	retval.msg = output;

	return retval;
}

CmdMan::CmdRet CmdMan::handleGetdata(Json::Value root) {
	CmdRet retval;
	Json::Value output;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	output["command"] = "getdata";
	output["file"] = fileman.getGetName();
	output["speed"] = 0.0f; // TODO
	output["cancel"] = true;

	if (root["cancel"].asBool()) {
		retval.type = error;
		output["error"] = "Server reports: " + root["error"].asString();
		fileman.cancelGet();
	} else if (!fileman.isGetting()) {
		retval.type = error;
		output["error"] = "Server responds to get message which was never sent.";
	} else if (root["remaining"].asInt() != fileman.getGetRemainingChunks()) {
		retval.type = error;
		output["error"] = std::string("Server reports number of remaining chunks as ") + std::to_string(root["remaining"].asInt()) + " but actual number is " +
		                  std::to_string(fileman.getGetRemainingChunks());
		fileman.cancelGet();
	} else if (root["file"].asString() != fileman.getGetName()) {
		retval.type = error;
		output["error"] = "Server reports filename " + root["file"].asString() + " but actual filename is " + fileman.getGetName();
		fileman.cancelGet();
	} else {
		output["cancel"] = false;
		output["error"] = "";
		fileman.writeBase64(root["data"].asString());
		// loaded successfully
		if (!root["remaining"].asInt()) {
			// everything received
			retval.type = print;
			//~ retval.msg = "succesfully downloaded file " + fileman.getGetName();
			fileman.closeGet();
		} else {
			retval.type = print | send;
			retval.nextcommand = "getdata";
		}
	}
	retval.msg = output;
	return retval;
}

CmdMan::CmdRet CmdMan::handleList(Json::Value root) {
	CmdRet retval;
	Json::Value output; // LOCALOUTPUT
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");

	output["command"] = "list";
	output["names"] = "";

	if (!root["accept"].asBool()) {
		retval.type = error;
		output["accept"] = false;
		output["error"] = "Server reports: " + root["error"].asString();
		fileman.cancelList();
	} else if (!fileman.isListing()) {
		retval.type = error;
		output["accept"] = false;
		output["error"] = "Server responds to list message which was never sent.";
	} else {
		fileman.setListChunks(root["chunks"].asInt());
		retval.type = send;
		output["accept"] = true;
		retval.nextcommand = "listdata";
	}

	retval.msg = output;
	return retval;
}

CmdMan::CmdRet CmdMan::handleListdata(Json::Value root) {
	CmdRet retval;
	Json::Value output, arr;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");
	vector<string> toadd;

	output["command"] = "list";
	output["names"] = "";
	output["accept"] = false;

	if (root["cancel"].asBool()) {
		retval.type = error;
		output["error"] = "Server reports: " + root["error"].asString();
		fileman.cancelList();
	} else if (!fileman.isListing()) {
		retval.type = error;
		output["error"] = "Server responds to list message which was never sent.";
	} else if (root["remaining"].asInt() != fileman.getListRemainingChunks()) {
		// the passed number of recieved chunks should equal the number of sent chunks
		retval.type = error;
		output["error"] = std::string("Server reports number of "
		                              "remaining chunks as ") +
		                  std::to_string(root["remaining"].asInt()) + " but actual number is " + std::to_string(fileman.getListRemainingChunks());
		fileman.cancelList();
	} else {
		output["accept"] = true;
		for (Json::Value i : root["names"])
			toadd.push_back(i.asString());
		fileman.putListData(toadd);
		// loaded successfully
		if (root["remaining"] <= 0) {
			// everything sent
			retval.type = print;
			for (string s : fileman.getListData())
				arr.append(s);
			output["names"] = arr;
			fileman.closeList();
		} else {
			retval.type = send;
			retval.nextcommand = "listdata";
		}
	}
	retval.msg = output;
	return retval;
}

CmdMan::CmdRet CmdMan::handleVersion(Json::Value root) {
	CmdRet retval;
	Json::Value output; // LOCALOUTPUT
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");

	output["command"] = "version";
	output["serverversion"] = std::to_string(root["major"].asInt()) + "." + std::to_string(root["minor"].asInt());
	output["clientversion"] = std::to_string(protocolMajorVersion) + "." + std::to_string(protocolMinorVersion);

	if (!root["accept"].asBool()) {
		retval.type = error | close;
		output["accept"] = false;
		currentState = connectionpossible;
	} else {
		retval.type = print;
		output["accept"] = true;
		currentState = loginpossible;
	}
	retval.msg = output;

	return retval;
}

CmdMan::CmdRet CmdMan::handleLogin(Json::Value root) {
	CmdRet retval;
	Json::Value output; // LOCALOUTPUT
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");

	output["command"] = "login";

	if (!root["accept"].asBool()) {
		retval.type = error;
		output["error"] = root["error"].asString();
		output["accept"] = false;
		currentState = loginpossible;
	} else {
		retval.type = print;
		output["error"] = "";
		output["accept"] = true;
		currentState = normal;
	}
	retval.msg = output;

	return retval;
}

CmdMan::CmdRet CmdMan::handleSignup(Json::Value root) {
	CmdRet retval;
	Json::Value output; // LOCALOUTPUT
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");

	output["command"] = "signup";

	if (!root["accept"].asBool()) {
		retval.type = error;
		output["error"] = root["error"].asString();
		output["accept"] = false;
		currentState = loginpossible;
	} else {
		retval.type = print;
		output["error"] = "";
		output["accept"] = true;
		currentState = normal;
	}
	retval.msg = output;

	return retval;
}

CmdMan::CmdRet CmdMan::handleHead(Json::Value root) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");

	if (!root["accept"].asBool()) {
		Json::Value output;
		output["command"] = "head";
		output["file"] = root["file"];
		output["error"] = "Server reports: " + root["error"].asString();
		output["accept"] = false;
		retval.type = error;
		retval.msg = output;
	} else {
		retval.type = print;
		retval.msg = root;
	}
	return retval;
}

CmdMan::CmdRet CmdMan::handleDeletefile(Json::Value root) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");

	if (!root["accept"].asBool()) {
		Json::Value output;
		output["command"] = "deletefile";
		output["file"] = root["file"];
		output["error"] = "Server reports: " + root["error"].asString();
		output["accept"] = false;
		retval.type = error;
		retval.msg = output;
	} else {
		retval.type = print;
		retval.msg = root;
	}
	return retval;
}

CmdMan::CmdRet CmdMan::handleDeleteme(Json::Value root) {
	CmdRet retval;
	DEBUGPRINT(string(__PRETTY_FUNCTION__) + " begin");

	if (!root["accept"].asBool()) {
		retval.type = error;
	} else {
		retval.type = close | print;
		currentState = connectionpossible;
	}
	retval.msg = root;
	return retval;
}