#include "../include/global.h"
#include "../include/ioman.h"

#include <boost/asio.hpp>
#include <iostream>

#include <boost/algorithm/string.hpp>
#include <string>
#include <vector>

#include <readline/history.h>
#include <readline/readline.h>

using std::string;
using std::vector;

using boost::asio::ip::tcp;
using boost::asio::buffer;

IoMan::IoMan(char *ipcstring) : cmdman(fileman) {
  ipstring = std::string(ipcstring);
  port = 1234;
  tcpsock = new tcp::socket(ios);
  connected = false;
	
	/* to be put elsewhere */

	/* setup json stuff */
  Json::CharReaderBuilder rbuilder;
  wbuilder.settings_["indentation"] = "";
  reader = rbuilder.newCharReader();
	runnetwork = false;
	runinput = false;
	runresponse = false;
	startlist = false;
	versionstatus = off;
	loginstatus = off;
}

IoMan::~IoMan() {
	runnetwork = false;
	runinput = false;
	runresponse = false;
	
	tnetwork.join();
	tinput.join();
	tresponse.join();
	
	if(connected) {
		disconnect();
	}
	
	delete tcpsock;
	delete reader;
}

void IoMan::printNormalMessage(string nouse) {
}

void IoMan::printErrorMessage(string nouse) {
}

void IoMan::printDebugMessage(string nouse) {
}

bool IoMan::connect() {
  tcp::endpoint *ep;

  ep = new tcp::endpoint(boost::asio::ip::address::from_string(ipstring), 1234);

  // establish connection
  printDebugMessage("IoMan::connect() connecting to " + ipstring);
  tcpsock->connect(*ep, errcode);
  if (errcode) {
	  delete ep;
	  printErrorMessage("IoMan::connect() couldnt connect to " + ipstring + "\n" + errcode.message());
	return false;
  }
  connected = true;
  delete ep;
  return true;
}


void IoMan::disconnect() {
  printDebugMessage("IoMan::disconnect()");
	tcpsock->close();
	connected = false;
}


bool IoMan::init() {
	CmdMan::CmdRet ret;
	string work;
	Json::Value root;
	
	printDebugMessage("IoMan::Init() begin");
	
	if(!connect()) return false;
	
	printDebugMessage("IoMan::Init() versioncheck");
	
	localmutex.lock();
	printDebugMessage(string(__PRETTY_FUNCTION__) + string(" get localmutex"));
	localinput.push_back("version " + protocolVersion);
	localmutex.unlock();
	printDebugMessage(string(__PRETTY_FUNCTION__) + string(" release localmutex"));
	
	printDebugMessage("IoMan::Init() begin");
	
	runnetwork = true;
	runinput = true;
	runresponse = true;
	
	tnetwork = std::thread(&IoMan::networkMain, this);
	tinput = std::thread(&IoMan::inputMain, this);
	tresponse = std::thread(&IoMan::responseMain, this);
	
	while(versionstatus == off);
	if(versionstatus == err) {
		runnetwork = false;
		runinput = false;
		runresponse = false;
		return false;
	}
	
	printWelcomeMessage();
	return true;
}

void IoMan::networkMain() {
	vector<Json::Value> toput;
	char *recvjson;
	Json::Value root;
	unsigned int jsonsize, readsize;
	
	printDebugMessage("IoMan::networkMain() begin");
	while(runnetwork) {
		std::this_thread::yield();
		std::this_thread::sleep_for(std::chrono::milliseconds(10));
		/*
		read from network until \n
		try to parse json
		- output error if not ok
		store all ok json in local vector
		
		get networkmutex
		put all local jsons into network vector
		release networkmutex
		*/
		
		// read from network
		readsize = boost::asio::read_until(*tcpsock, recvbuf, '\n', errcode);
		printDebugMessage(string(__PRETTY_FUNCTION__) + string(" asio::read() ok"));
		if (errcode && errcode != boost::asio::error::eof) {
			printErrorMessage("IoMan::networkMain() couldnt read json data\n" + errcode.message());
			continue;
		}
		
		recvjson = (char *)(boost::asio::buffer_cast<const char *>(recvbuf.data()));
		while(strchr(recvjson, '\n')) {
			// parse
			jsonsize = strchr(recvjson, '\n') - recvjson + 1;
			
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" found jsondata ") + string(recvjson));
			
			if (!reader->parse(recvjson, recvjson + jsonsize, &root, &jsonerror)) {
				printErrorMessage("IoMan::networkMain() couldnt parse json data: " + jsonerror);
				recvbuf.consume(jsonsize);
				continue;
			}
			recvbuf.consume(jsonsize);
			readsize -= jsonsize;
			
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" remaining recvbuf ") + string(boost::asio::buffer_cast<const char *>(recvbuf.data())));
			
			for(int i = 0; i < jsonsize; i++) recvjson++;
			// store locally
			toput.push_back(root);
		}
		
		if(toput.size()){
			// put into global vector
			netmutex.lock();
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" get netmutex"));
			netinput.insert(netinput.end(), toput.begin(), toput.end());
			netmutex.unlock();
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" release netmutex"));
		}
		
		// clean up local stuff
		toput = vector<Json::Value>();
		recvbuf.consume(readsize);
	}
}

void IoMan::inputMain() {
	vector<string> toprocess;
	string command;
	vector<string> args;
	CmdMan::CmdRet cmdret;
	
	size_t prev, index, quot;
	
	printDebugMessage("IoMan::inputMain() begin");
	while(runinput) {
		std::this_thread::yield();
		std::this_thread::sleep_for(std::chrono::milliseconds(10));
		/*
		get inputmutex
		read all input vector into local vector
		release inputmutex
		
		process inputs
		send to server if required
		*/
		
		// read into local vector
		if(localinput.size()) {
			localmutex.lock();
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" has localmutex"));
			toprocess = vector<string>(localinput);
			localinput = vector<string>();
			localmutex.unlock();
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" release localmutex"));
		}
		
		// printDebugMessage(string("have ") + std::to_string(toprocess.size()) + string(" commands"));
		
		// process
		for(string cmd : toprocess) {
			args = vector<string>();
			
			if((index = cmd.find(" ")) == string::npos) {
				// only command no args
				command = cmd;
			}
			else {
				command = cmd.substr(0, index);
				//~ index++;
				while(true) {
					// find first char thats not a space
					while(cmd[index] == ' ') {
						index++;
						
						// bounds check
						if(index == cmd.size()) goto end_tokenizing;
					}
					
					cmd = cmd.substr(index);
					
					if(cmd[0] == '\"') {
						// quoted string
						index = cmd.find("\"");
						args.push_back(cmd.substr(1, index-1));
						index++;
						
						/*
						tokens.push_back(cmd.substr(0, ++index));
						*/
						
						// char after closing quote should be space while within bounds
						if(index == cmd.size()) goto end_tokenizing;
					}
					else {
						// non-quoted string
						index = cmd.find(" ");
						if(index == string::npos) { // no spaces, last arg
							args.push_back(cmd);
							goto end_tokenizing;
						}
						else {
							args.push_back(cmd.substr(0, index));
						}
					}
				}
				end_tokenizing: ;
			}
			
			cmdret = cmdman.execute(command, args);
			
			// determine wether to send something and do so if required
			switch(cmdret.type) {
				case CmdMan::rettype::send: {
					printDebugMessage("IoMan::inputMain() sending json \"" + cmdret.msg + "\"");
					boost::asio::write(*tcpsock, buffer(cmdret.msg + "\n"), errcode);
					if (errcode) {
						printErrorMessage("IoMan::inputMain() couldnt send json data\n" + errcode.message() + "\n");
						continue;
					}
					break;
				}
				case CmdMan::rettype::notsend: {
					printNormalMessage(cmdret.msg);
					break;
				}
				case CmdMan::rettype::error: {
					printErrorMessage(cmdret.msg);
					break;
				}
			}
		}
		
		// clean up local stuff
		toprocess = vector<string>();
	}
}

void IoMan::responseMain() {
	vector<Json::Value> toprocess;
	vector<string> toput;
	CmdMan::CmdRet cmdret;
	
	printDebugMessage("IoMan::responseMain() begin");
	while(runresponse) {
		std::this_thread::yield();
		std::this_thread::sleep_for(std::chrono::milliseconds(10));
		/*
		get networkmutex
		read all network vector into local vector
		release networkmutex
		
		process all jsons
		process putdata
		process getdata
		process listdata
		
		get inputmutex
		place new commands into input vector
		release inputmutex
		*/
		
		// read into local vector
		if(netinput.size()) {
			netmutex.lock();
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" get netmutex"));
			toprocess = vector<Json::Value>(netinput);
			netinput = vector<Json::Value>();
			netmutex.unlock();
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" release netmutex"));
		}
		
		// process jsons
		for(Json::Value root : toprocess) {
			cmdret = cmdman.handle(root);
			switch(cmdret.type) {
				case CmdMan::rettype::startlist: {
					startlist = true;
					break;
				}
				case CmdMan::rettype::stoplist: {
					startlist = false;
					break;
				}
				case CmdMan::rettype::close: {
					/* TODO i dunno */
					runmain = false;
					break;
				}
				case CmdMan::rettype::error: {
					if(versionstatus == off) versionstatus = err;
					else if(loginstatus == off) loginstatus = err;
					printErrorMessage(cmdret.msg);
					break;
				}
				case CmdMan::rettype::seton: {
					if(versionstatus == off) versionstatus = on;
					else loginstatus = on;
				}
				case CmdMan::rettype::notsend: {
					printNormalMessage(cmdret.msg);
					break;
				}
				case CmdMan::rettype::send: {
					toput.push_back(cmdret.msg);
					break;
				}
			}
		}
		
		if(toput.size()) {
			// put new commands into global vector
			localmutex.lock();
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" get localmutex"));
			localinput.insert(localinput.end(), toput.begin(), toput.end());
			localmutex.unlock();
			printDebugMessage(string(__PRETTY_FUNCTION__) + string(" release localmutex"));
		}
		
		// clean up local stuff
		toprocess = vector<Json::Value>();
		toput = vector<string>();
	}
}

void IoMan::run() {
	printDebugMessage("IoMan::run() begin");
	char *line = NULL, *user = NULL, *pass = NULL;
	vector<string> tokens;
	string work, command;
	CmdMan::CmdRet cmdret;
	Json::Value root;
	
	runmain = true;
	
	while(!user) {
		user = readline(getUserPrompt().c_str());
		printErrorMessage("Using user: " + string(user));
	}
	while(!pass) {
		pass = readline(getPassPrompt().c_str());
		printErrorMessage("Using pass: " + string(pass));
	}
	
	printDebugMessage("IoMan::run() login");
	
	localmutex.lock();
	printDebugMessage(string(__PRETTY_FUNCTION__) + string(" get localmutex"));
	localinput.push_back("login " + string(user) + " " + string(pass));
	localmutex.unlock();
	printDebugMessage(string(__PRETTY_FUNCTION__) + string(" release localmutex"));
	free(user);
	free(pass);
	
	while(loginstatus == off);
	if(loginstatus == err) return;
	
	while(runmain) {
		free(line);
		
		line = readline(getCmdPrompt().c_str());
		
		if(!runmain) break;

		// if no input, do not add to history, and go to reading next line
		if (strlen(line) == 0) {
		  continue;
		}

		// split input line into tokens
		boost::algorithm::split(tokens, std::string(line),
					boost::algorithm::is_any_of(" "),
					boost::algorithm::token_compress_on);

		// if input contains only spaces, do not add to history, and go to reading
		// next line
		if (tokens.size() < 1) {
		  continue;
		}

		// add the line to history
		add_history(line);
		
		localmutex.lock();
		printDebugMessage(string(__PRETTY_FUNCTION__) + string(" get localmutex"));
		localinput.push_back(line);
		localmutex.unlock();
		printDebugMessage(string(__PRETTY_FUNCTION__) + string(" release localmutex"));
		
		if(!connected) break;
	}
	
	free(line);
}