/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
 *                       E-mail:
 *                <brain@chatspike.net>
 *           	  <Craig@chatspike.net>
 *     
 * Written by Craig Edwards, Craig McLure, and others.
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

using namespace std;

#include <stdio.h>
#include <string>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "inspircd.h"
#include "m_sql.h"

enum LogTypes { LT_OPER = 1, LT_KILL, LT_SERVLINK, LT_XLINE, LT_CONNECT, LT_DISCONNECT, LT_FLOOD, LT_LOADMODULE };

/* $ModDesc: Logs network-wide data to an SQL database */

class ModuleSQLLog : public Module
{
	Server* Srv;
	ConfigReader* Conf;
	unsigned long dbid;
	Module* SQLModule;

 public:
	bool ReadConfig()
	{
		Conf = new ConfigReader();
		dbid = Conf->ReadInteger("sqllog","dbid",0,true);	// database id of a database configured in m_sql (see m_sql config)
		delete Conf;
		SQLModule = Srv->FindModule("m_sql.so");
		if (!SQLModule)
			Srv->Log(DEFAULT,"WARNING: m_SQLLog.so could not initialize because m_sql.so is not loaded. Load the module and rehash your server.");
		return (SQLModule);
	}

	ModuleSQLLog(Server* Me) : Module::Module(Me)
	{
		Srv = Me;
		ReadConfig();
	}

	void Implements(char* List)
	{
		List[I_OnRehash] = List[I_OnOper] = List[I_OnGlobalOper] = List[I_OnKill] = 1;
		List[I_OnPreCommand] = List[I_OnUserConnect] = List[I_OnGlobalConnect] = 1;
		List[I_OnUserQuit] = List[I_OnLoadModule] = 1;
	}

	virtual void OnRehash(const std::string &parameter)
	{
		ReadConfig();
	}

	long InsertNick(const std::string &nick)
	{
		long nid = -1;
		
		SQLRequest* query = new SQLRequest(SQL_RESULT,dbid,"SELECT id,actor FROM ircd_log_actors WHERE actor='"+nick+"'");
		Request queryrequest((char*)query, this, SQLModule);
		SQLResult* result = (SQLResult*)queryrequest.Send();
		
		if (result->GetType() == SQL_OK)
		{
			SQLRequest* rowrequest = new SQLRequest(SQL_ROW,dbid,"");
			Request rowquery((char*)rowrequest, this, SQLModule);
			SQLResult* rowresult = (SQLResult*)rowquery.Send();
			
			if (rowresult->GetType() == SQL_ROW)
			{
				nid = atoi(rowresult->GetField("id").c_str());
				delete rowresult;
			}
			
			delete rowrequest;
			delete result;
		}
		
		query->SetQueryType(SQL_DONE);
		query->SetConnID(dbid);
		Request donerequest((char*)query, this, SQLModule);
		donerequest.Send();
		delete query;
		
		if (nid < 1)
		{
			SQLRequest* query2 = new SQLRequest(SQL_COUNT,dbid,"INSERT INTO ircd_log_actors VALUES('','"+nick+"')");
			Request queryrequest2((char*)query2, this, SQLModule);
			SQLResult* result2 = (SQLResult*)queryrequest2.Send();
			
			if (result2->GetType() == SQL_ERROR)
			{
				Srv->Log(DEFAULT,"SQL log error: " + result2->GetError());
			}
			
			if (result2)
				delete result;
			if (query2)
				delete query2;
				
			nid = InsertNick(nick);
		}
		return nid;
	}

	void InsertEntry(unsigned long category,unsigned long nickid,unsigned long hostid,unsigned long sourceid,unsigned long date)
	{
		char querybuffer[MAXBUF];
		
		snprintf(querybuffer,MAXBUF,"INSERT INTO ircd_log VALUES('',%lu,%lu,%lu,%lu,%lu)",(unsigned long)category,(unsigned long)nickid,(unsigned long)hostid,(unsigned long)sourceid,(unsigned long)date);
		SQLRequest* query = new SQLRequest(SQL_COUNT,dbid,querybuffer);
		Request queryrequest((char*)query, this, SQLModule);
		SQLResult* result = (SQLResult*)queryrequest.Send();
		
		if (result->GetType() == SQL_ERROR)
		{
			Srv->Log(DEFAULT,"SQL log error: " + result->GetError());
		}
		
		if (result)
			delete result;
		if (query)
			delete query;
			
		return;
	}

	long InsertHost(const std::string &host)
	{
		long hid = -1;
		
		SQLRequest* query = new SQLRequest(SQL_RESULT,dbid,"SELECT id,hostname FROM ircd_log_hosts WHERE hostname='"+host+"'");
		Request queryrequest((char*)query, this, SQLModule);
		SQLResult* result = (SQLResult*)queryrequest.Send();
		
		if (result->GetType() == SQL_OK)
		{
			SQLRequest* rowrequest = new SQLRequest(SQL_ROW,dbid,"");
			Request rowquery((char*)rowrequest, this, SQLModule);
			SQLResult* rowresult = (SQLResult*)rowquery.Send();
			
			if (rowresult->GetType() == SQL_ROW)
			{
				hid = atoi(rowresult->GetField("id").c_str());
				delete rowresult;
			}
			
			delete rowrequest;
			delete result;
		}
		
		query->SetQueryType(SQL_DONE);
		query->SetConnID(dbid);
		Request donerequest((char*)query, this, SQLModule);
		donerequest.Send();
		delete query;
		
		if (hid < 1)
		{
			SQLRequest* query2 = new SQLRequest(SQL_COUNT,dbid,"INSERT INTO ircd_log_hosts VALUES('','"+host+"')");
			Request queryrequest2((char*)query2, this, SQLModule);
			SQLResult* result2 = (SQLResult*)queryrequest2.Send();
			
			if (result2->GetType() == SQL_ERROR)
			{
				Srv->Log(DEFAULT,"SQL log error: " + result2->GetError());
			}
			
			if (result)
				delete result2;
			if (query)
				delete query2;
			hid = InsertHost(host);
		}
		
		return hid;
	}

	void AddLogEntry(int category, const std::string &nick, const std::string &host, const std::string &source)
	{
		// is the sql module loaded? If not, we don't attempt to do anything.
		if (!SQLModule)
			return;

		long nickid = InsertNick(nick);
		long sourceid = InsertNick(source);
		long hostid = InsertHost(host);
		InsertEntry((unsigned)category,(unsigned)nickid,(unsigned)hostid,(unsigned)sourceid,(unsigned long)time(NULL));
	}

	virtual void OnOper(userrec* user, const std::string &opertype)
	{
		AddLogEntry(LT_OPER,user->nick,user->host,user->server);
	}

	virtual void OnGlobalOper(userrec* user)
	{
		AddLogEntry(LT_OPER,user->nick,user->host,user->server);
	}

	virtual int OnKill(userrec* source, userrec* dest, const std::string &reason)
	{
		AddLogEntry(LT_KILL,dest->nick,dest->host,source->nick);
		return 0;
	}

	virtual int OnPreCommand(const std::string &command, char **parameters, int pcnt, userrec *user, bool validated)
	{
		if ((command == "GLINE") || (command == "KLINE") || (command == "ELINE") || (command == "ZLINE"))
		{
			AddLogEntry(LT_XLINE,user->nick,command[0]+std::string(":")+std::string(parameters[0]),user->server);
		}
		return 0;
	}

	virtual void OnUserConnect(userrec* user)
	{
		AddLogEntry(LT_CONNECT,user->nick,user->host,user->server);
	}

	virtual void OnGlobalConnect(userrec* user)
	{
		AddLogEntry(LT_CONNECT,user->nick,user->host,user->server);
	}

	virtual void OnUserQuit(userrec* user, const std::string &reason)
	{
		AddLogEntry(LT_DISCONNECT,user->nick,user->host,user->server);
	}

	virtual void OnLoadModule(Module* mod, const std::string &name)
	{
		AddLogEntry(LT_LOADMODULE,name,Srv->GetServerName(),Srv->GetServerName());
	}

	virtual ~ModuleSQLLog()
	{
	}
	
	virtual Version GetVersion()
	{
		return Version(1,0,0,1,VF_VENDOR);
	}
	
};

class ModuleSQLLogFactory : public ModuleFactory
{
 public:
	ModuleSQLLogFactory()
	{
	}
	
	~ModuleSQLLogFactory()
	{
	}
	
	virtual Module * CreateModule(Server* Me)
	{
		return new ModuleSQLLog(Me);
	}
	
};


extern "C" void * init_module( void )
{
	return new ModuleSQLLogFactory;
}