//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
// $NoKeywords: $
//
//=============================================================================//

#include <stdio.h>

#include "interface.h"
#include "filesystem.h"
#include "engine/iserverplugin.h"
#include "dlls/iplayerinfo.h"
#include "eiface.h"
#include "igameevents.h"
#include "convar.h"
#include "Color.h"

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"

// Interfaces from the engine
IVEngineServer	*engine = NULL; // helper functions (messaging clients, loading content, making entities, running commands, etc)
IFileSystem		*filesystem = NULL; // file I/O 
IGameEventManager *gameeventmanager = NULL; // game events interface
IPlayerInfoManager *playerinfomanager = NULL; // game dll interface to interact with players
IServerPluginHelpers *helpers = NULL; // special 3rd party plugin helpers from the engine

// function to initialize any cvars/command in this plugin
void InitCVars( CreateInterfaceFn cvarFactory );

// useful helper func
inline bool FStrEq(const char *sz1, const char *sz2)
{
	return(Q_stricmp(sz1, sz2) == 0);
}

//---------------------------------------------------------------------------------
// Purpose: a sample 3rd party plugin class
//---------------------------------------------------------------------------------
class CEmptyServerPlugin: public IServerPluginCallbacks, public IGameEventListener
{
public:
	CEmptyServerPlugin();
	~CEmptyServerPlugin();

	// IServerPluginCallbacks methods
	virtual bool			Load(	CreateInterfaceFn interfaceFactory, CreateInterfaceFn gameServerFactory );
	virtual void			Unload( void );
	virtual void			Pause( void );
	virtual void			UnPause( void );
	virtual const char     *GetPluginDescription( void );      
	virtual void			LevelInit( char const *pMapName );
	virtual void			ServerActivate( edict_t *pEdictList, int edictCount, int clientMax );
	virtual void			GameFrame( bool simulating );
	virtual void			LevelShutdown( void );
	virtual void			ClientActive( edict_t *pEntity );
	virtual void			ClientDisconnect( edict_t *pEntity );
	virtual void			ClientPutInServer( edict_t *pEntity, char const *playername );
	virtual void			SetCommandClient( int index );
	virtual void			ClientSettingsChanged( edict_t *pEdict );
	virtual PLUGIN_RESULT	ClientConnect( bool *bAllowConnect, edict_t *pEntity, const char *pszName, const char *pszAddress, char *reject, int maxrejectlen );
	virtual PLUGIN_RESULT	ClientCommand( edict_t *pEntity );
	virtual PLUGIN_RESULT	NetworkIDValidated( const char *pszUserName, const char *pszNetworkID );

	// IGameEventListener Interface
	virtual void FireGameEvent( KeyValues * event );

	virtual int GetCommandIndex() { return m_iClientCommandIndex; }
private:
	int m_iClientCommandIndex;
};


// 
// The plugin is a static singleton that is exported as an interface
//
CEmptyServerPlugin g_EmtpyServerPlugin;
EXPOSE_SINGLE_INTERFACE_GLOBALVAR(CEmptyServerPlugin, IServerPluginCallbacks, INTERFACEVERSION_ISERVERPLUGINCALLBACKS, g_EmtpyServerPlugin );

//---------------------------------------------------------------------------------
// Purpose: constructor/destructor
//---------------------------------------------------------------------------------
CEmptyServerPlugin::CEmptyServerPlugin()
{
	m_iClientCommandIndex = 0;
}

CEmptyServerPlugin::~CEmptyServerPlugin()
{
}

//---------------------------------------------------------------------------------
// Purpose: called when the plugin is loaded, load the interface we need from the engine
//---------------------------------------------------------------------------------
bool CEmptyServerPlugin::Load(	CreateInterfaceFn interfaceFactory, CreateInterfaceFn gameServerFactory )
{
	playerinfomanager = (IPlayerInfoManager *)gameServerFactory(INTERFACEVERSION_PLAYERINFOMANAGER,NULL);
	if ( !playerinfomanager )
	{
		Warning( "Unable to load playerinfomanager, ignoring\n" ); // this isn't fatal, we just won't be able to access specific player data
	}

	// get the interfaces we want to use
	if(	!(engine = (IVEngineServer*)interfaceFactory(INTERFACEVERSION_VENGINESERVER, NULL)) ||
		!(gameeventmanager = (IGameEventManager *)interfaceFactory(INTERFACEVERSION_GAMEEVENTSMANAGER,NULL)) ||
		!(filesystem = (IFileSystem*)interfaceFactory(FILESYSTEM_INTERFACE_VERSION, NULL)) ||
		!(helpers = (IServerPluginHelpers*)interfaceFactory(INTERFACEVERSION_ISERVERPLUGINHELPERS, NULL))
		)
	{
		return false; // we require all these interface to function
	}

	InitCVars( interfaceFactory ); // register any cvars we have defined
	return true;
}

//---------------------------------------------------------------------------------
// Purpose: called when the plugin is unloaded (turned off)
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::Unload( void )
{
	gameeventmanager->RemoveListener( this ); // make sure we are unloaded from the event system
}

//---------------------------------------------------------------------------------
// Purpose: called when the plugin is paused (i.e should stop running but isn't unloaded)
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::Pause( void )
{
}

//---------------------------------------------------------------------------------
// Purpose: called when the plugin is unpaused (i.e should start executing again)
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::UnPause( void )
{
}

//---------------------------------------------------------------------------------
// Purpose: the name of this plugin, returned in "plugin_print" command
//---------------------------------------------------------------------------------
const char *CEmptyServerPlugin::GetPluginDescription( void )
{
	return "Emtpy-Plugin, Valve";
}

//---------------------------------------------------------------------------------
// Purpose: called on level start
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::LevelInit( char const *pMapName )
{
	Msg( "Level \"%s\" has been loaded\n", pMapName );
	gameeventmanager->AddListener( this, true );
}

//---------------------------------------------------------------------------------
// Purpose: called on level start, when the server is ready to accept client connections
//		edictCount is the number of entities in the level, clientMax is the max client count
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::ServerActivate( edict_t *pEdictList, int edictCount, int clientMax )
{
}

//---------------------------------------------------------------------------------
// Purpose: called once per server frame, do recurring work here (like checking for timeouts)
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::GameFrame( bool simulating )
{
}

//---------------------------------------------------------------------------------
// Purpose: called on level end (as the server is shutting down or going to a new map)
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::LevelShutdown( void ) // !!!!this can get called multiple times per map change
{
	gameeventmanager->RemoveListener( this );
}

//---------------------------------------------------------------------------------
// Purpose: called when a client spawns into a server (i.e as they begin to play)
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::ClientActive( edict_t *pEntity )
{
}

//---------------------------------------------------------------------------------
// Purpose: called when a client leaves a server (or is timed out)
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::ClientDisconnect( edict_t *pEntity )
{
}

//---------------------------------------------------------------------------------
// Purpose: called on 
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::ClientPutInServer( edict_t *pEntity, char const *playername )
{
	KeyValues *kv = new KeyValues( "msg" );
	kv->SetString( "title", "Hello" );
	kv->SetString( "msg", "Hello there" );
	kv->SetColor( "color", Color( 255, 0, 0, 255 ));
	kv->SetInt( "level", 5);
	kv->SetInt( "time", 10);
	helpers->CreateMessage( pEntity, DIALOG_MSG, kv, this );
	kv->deleteThis();
}

//---------------------------------------------------------------------------------
// Purpose: called on level start
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::SetCommandClient( int index )
{
	m_iClientCommandIndex = index;
}

//---------------------------------------------------------------------------------
// Purpose: called on level start
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::ClientSettingsChanged( edict_t *pEdict )
{
	if ( playerinfomanager )
	{
		IPlayerInfo *playerinfo = playerinfomanager->GetPlayerInfo( pEdict );

		const char * name = engine->GetClientConVarValue( engine->IndexOfEdict(pEdict), "name" );

		if ( playerinfo && name && playerinfo->GetName() && 
			 Q_stricmp( name, playerinfo->GetName()) ) // playerinfo may be NULL if the MOD doesn't support access to player data 
													   // OR if you are accessing the player before they are fully connected
		{
			char msg[128];
			Q_snprintf( msg, sizeof(msg), "Your name changed to \"%s\" (from \"%s\"\n", name, playerinfo->GetName() ); 
			engine->ClientPrintf( pEdict, msg ); // this is the bad way to check this, the better option it to listen for the "player_changename" event in FireGameEvent()
												// this is here to give a real example of how to use the playerinfo interface
		}
	}
}

//---------------------------------------------------------------------------------
// Purpose: called when a client joins a server
//---------------------------------------------------------------------------------
PLUGIN_RESULT CEmptyServerPlugin::ClientConnect( bool *bAllowConnect, edict_t *pEntity, const char *pszName, const char *pszAddress, char *reject, int maxrejectlen )
{
	return PLUGIN_CONTINUE;
}

//---------------------------------------------------------------------------------
// Purpose: called when a client types in a command (only a subset of commands however, not CON_COMMAND's)
//---------------------------------------------------------------------------------
PLUGIN_RESULT CEmptyServerPlugin::ClientCommand( edict_t *pEntity )
{
	const char *pcmd = engine->Cmd_Argv(0);

	if ( !pEntity || pEntity->IsFree() ) 
	{
		return PLUGIN_CONTINUE;
	}

	if ( FStrEq( pcmd, "menu" ) )
	{
		KeyValues *kv = new KeyValues( "menu" );
		kv->SetString( "title", "You've got options, hit ESC" );
		kv->SetInt( "level", 1 );
		kv->SetColor( "color", Color( 255, 0, 0, 255 ));
		kv->SetInt( "time", 20 );
		kv->SetString( "msg", "Pick an option" );
		
		for( int i = 1; i < 9; i++ )
		{
			char num[10], msg[10], cmd[10];
			Q_snprintf( num, sizeof(num), "%i", i );
			Q_snprintf( msg, sizeof(msg), "Option %i", i );
			Q_snprintf( cmd, sizeof(cmd), "option%i", i );

			KeyValues *item1 = kv->FindKey( num, true );
			item1->SetString( "msg", msg );
			item1->SetString( "command", cmd );
		}

		helpers->CreateMessage( pEntity, DIALOG_MENU, kv, this );
		kv->deleteThis();
		return PLUGIN_STOP; // we handled this function
	}
	else if ( FStrEq( pcmd, "rich" ) )
	{
		KeyValues *kv = new KeyValues( "menu" );
		kv->SetString( "title", "A rich message" );
		kv->SetInt( "level", 1 );
		kv->SetInt( "time", 20 );
		kv->SetString( "msg", "This is a long long long text string.\n\nIt also has line breaks." );
		
		helpers->CreateMessage( pEntity, DIALOG_TEXT, kv, this );
		kv->deleteThis();
		return PLUGIN_STOP; // we handled this function
	}
	else if ( FStrEq( pcmd, "msg" ) )
	{
		KeyValues *kv = new KeyValues( "menu" );
		kv->SetString( "title", "Just a simple hello" );
		kv->SetInt( "level", 1 );
		kv->SetInt( "time", 20 );
		
		helpers->CreateMessage( pEntity, DIALOG_MSG, kv, this );
		kv->deleteThis();
		return PLUGIN_STOP; // we handled this function
	}


	return PLUGIN_CONTINUE;
}

//---------------------------------------------------------------------------------
// Purpose: called when a client is authenticated
//---------------------------------------------------------------------------------
PLUGIN_RESULT CEmptyServerPlugin::NetworkIDValidated( const char *pszUserName, const char *pszNetworkID )
{
	return PLUGIN_CONTINUE;
}

//---------------------------------------------------------------------------------
// Purpose: called when an event is fired
//---------------------------------------------------------------------------------
void CEmptyServerPlugin::FireGameEvent( KeyValues * event )
{
	const char * name = event->GetName();
	Msg( "CEmptyServerPlugin::FireGameEvent: Got event \"%s\"\n", name );
}

//---------------------------------------------------------------------------------
// Purpose: an example of how to implement a new command
//---------------------------------------------------------------------------------
CON_COMMAND( empty_version, "prints the version of the empty plugin" )
{
	Msg( "Version:1.0.0.0\n" );
}

//---------------------------------------------------------------------------------
// Purpose: an example cvar
//---------------------------------------------------------------------------------
static ConVar empty_cvar("plugin_empty", "0", 0, "Example plugin cvar");
