#include "TwitterPlugin.h"

#include "Requests/StatusUpdateRequest.h"

#include "Requests/DirectMessageRequest.h"

#include "Requests/TimelineRequest.h"

#include "Requests/FetchFriends.h"

#include "Requests/HelpMessageRequest.h"

#include "Requests/PINExchangeProcess.h"

#include "Requests/OAuthFlow.h"

#include "Requests/CreateFriendRequest.h"

#include "Requests/DestroyFriendRequest.h"

#include "Requests/RetweetRequest.h"

#include "Requests/ProfileImageRequest.h"

#include "Swiften/StringCodecs/Hexify.h"

DEFINE_LOGGER(logger, "Twitter Backend");

TwitterPlugin *np = NULL;

Swift::SimpleEventLoop *loop_; // Event Loop

const std::string OLD_APP_KEY = "PCWAdQpyyR12ezp2fVwEhw";

const std::string OLD_APP_SECRET = "EveLmCXJIg2R7BTCpm6OWV8YyX49nI0pxnYXh7JMvDg";

#define abs(x) ((x)<0?-(x):(x))

#define SHA(x) (Swift::Hexify::hexify(Swift::SHA1::getHash(Swift::createByteArray((x)))))

//Compares two +ve intergers 'a' and 'b' represented as strings 

static int cmp(std::string a, std::string b)

{

	int diff = abs((int)a.size() - (int)b.size());

	if(a.size() < b.size()) a = std::string(diff,'0') + a;

	else b = std::string(diff,'0') + b;

	if(a == b) return 0;

	if(a < b) return -1;

	return 1;

}

TwitterPlugin::TwitterPlugin(Config *config, Swift::SimpleEventLoop *loop, StorageBackend *storagebackend, const std::string &host, int port) : NetworkPlugin() 

{

	this->config = config;

	this->storagebackend = storagebackend;

	if (CONFIG_HAS_KEY(config, "twitter.consumer_key") == false) {

		consumerKey = "5mFePMiJi0KpeURONkelg";

	}

	else {

		consumerKey = CONFIG_STRING(config, "twitter.consumer_key");

	}

	if (CONFIG_HAS_KEY(config, "twitter.consumer_secret") == false) {

		consumerSecret = "YFZCDJwRhbkccXEnaYr1waCQejTJcOY8F7l5Wim3FA";

	}

	else {

		consumerSecret = CONFIG_STRING(config, "twitter.consumer_secret");

	}

	if (consumerSecret.empty() || consumerKey.empty()) {

		LOG4CXX_ERROR(logger, "Consumer key and Consumer secret can't be empty.");

		exit(1);

	}

	adminLegacyName = "twitter.com"; 

	adminChatRoom = "#twitter"; 

	adminNickName = "twitter"; 

	adminAlias = "twitter";

	OAUTH_KEY = "twitter_oauth_token";

	OAUTH_SECRET = "twitter_oauth_secret";

	MODE = "mode";

	m_factories = new Swift::BoostNetworkFactories(loop);

	m_conn = m_factories->getConnectionFactory()->createConnection();

	m_conn->onDataRead.connect(boost::bind(&TwitterPlugin::_handleDataRead, this, _1));

	m_conn->connect(Swift::HostAddressPort(Swift::HostAddress(host), port));

	tp = new ThreadPool(loop_, 10);

	tweet_timer = m_factories->getTimerFactory()->createTimer(60000);

	message_timer = m_factories->getTimerFactory()->createTimer(60000);

	tweet_timer->onTick.connect(boost::bind(&TwitterPlugin::pollForTweets, this));

	message_timer->onTick.connect(boost::bind(&TwitterPlugin::pollForDirectMessages, this));

	tweet_timer->start();

	message_timer->start();

	LOG4CXX_INFO(logger, "Starting the plugin.");

}

TwitterPlugin::~TwitterPlugin() 

{

	delete storagebackend;

	std::set<std::string>::iterator it;

	for(it = onlineUsers.begin() ; it != onlineUsers.end() ; it++) delete userdb[*it].sessions;

	delete tp;

}

// Send data to NetworkPlugin server

void TwitterPlugin::sendData(const std::string &string) 

{

	m_conn->write(Swift::createSafeByteArray(string));

}

// Receive date from the NetworkPlugin server and invoke the appropirate payload handler (implement in the NetworkPlugin class)

void TwitterPlugin::_handleDataRead(boost::shared_ptr<Swift::SafeByteArray> data) 

{

	std::string d(data->begin(), data->end());

	handleDataRead(d);

}

// User trying to login into his twitter account

void TwitterPlugin::handleLoginRequest(const std::string &user, const std::string &legacyName, const std::string &password) 

{

	if(userdb.count(user) && (userdb[user].connectionState == NEW || 

										userdb[user].connectionState == CONNECTED || 

										userdb[user].connectionState == WAITING_FOR_PIN)) {

		LOG4CXX_INFO(logger, std::string("A session corresponding to ") + user + std::string(" is already active"))

		return;

	}

	LOG4CXX_INFO(logger, std::string("Received login request for ") + user)	

	initUserSession(user, legacyName, password);

	handleConnected(user);

	LOG4CXX_INFO(logger, "SPECTRUM 1 USER? - " << (userdb[user].spectrum1User? "true" : "false")) 

	LOG4CXX_INFO(logger, user << ": Adding Buddy " << adminLegacyName << " " << adminAlias)

	handleBuddyChanged(user, adminLegacyName, adminAlias, std::vector<std::string>(), pbnetwork::STATUS_ONLINE);

	userdb[user].nickName = "";

	LOG4CXX_INFO(logger, "Querying database for usersettings of " << user)

	std::string key, secret;

	getUserOAuthKeyAndSecret(user, key, secret);

	if(key == "" || secret == "") {			

		LOG4CXX_INFO(logger, "Intiating OAuth Flow for user " << user)

		setTwitterMode(user, 0);

		tp->runAsThread(new OAuthFlow(np, userdb[user].sessions, user, userdb[user].sessions->getTwitterUsername()));

	} else {

		LOG4CXX_INFO(logger, user << " is already registerd. Using the stored oauth key and secret")

		LOG4CXX_INFO(logger, key << " " << secret)	

		pinExchangeComplete(user, key, secret);

	}

}

// User logging out

void TwitterPlugin::handleLogoutRequest(const std::string &user, const std::string &legacyName) 

{

	if(onlineUsers.count(user)) {

		delete userdb[user].sessions;

		userdb[user].sessions = NULL;

		userdb[user].connectionState = DISCONNECTED;

		onlineUsers.erase(user);

	}

		void deleteFriendResponse(std::string &user, User &frnd, Error &errMsg);

		void RetweetResponse(std::string &user, Error &errMsg);

		void profileImageResponse(std::string &user, std::string &buddy, std::string &img, unsigned int reqID, Error &errMsg);

		/***********************************************************************************/

	private:

		std::string getMostRecentTweetIDUnsafe(const std::string user);

		enum status {NEW, WAITING_FOR_PIN, CONNECTED, DISCONNECTED};

		enum mode {SINGLECONTACT, MULTIPLECONTACT, CHATROOM};

		Config *config;

		std::string adminLegacyName;

		std::string adminChatRoom;

		std::string adminNickName;

		std::string adminAlias;

		std::string consumerKey;

		std::string consumerSecret;

		std::string OAUTH_KEY;

		std::string OAUTH_SECRET;

		std::string MODE;

		boost::mutex dblock, userlock;

		ThreadPool *tp;

		std::set<std::string> onlineUsers;

		struct UserData

		{

			std::string legacyName;

			bool spectrum1User; //Legacy support

			User userTwitterObj;

			std::string userImg;

			twitCurl* sessions;		

			status connectionState;

			std::string mostRecentTweetID;

			std::string mostRecentDirectMessageID;

			std::string nickName;

			std::set<std::string> buddies;

			std::map<std::string, User> buddiesInfo;

			std::map<std::string, std::string> buddiesImgs;

			mode twitterMode;

			UserData() { sessions = NULL; }

		};

		std::map<std::string, UserData> userdb;

};

#endif