/**

 * vim: set ts=4 :

 * =============================================================================

 * SourceMod

 * Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.

 * =============================================================================

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, version 3.0, as published by the

 * Free Software Foundation.

 * 

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more

 * details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to link the

 * code of this program (as well as its derivative works) to "Half-Life 2," the

 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

 * by the Valve Corporation.  You must obey the GNU General Public License in

 * all respects for all other code used.  Additionally, AlliedModders LLC grants

 * this exception to all derivative works.  AlliedModders LLC defines further

 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

 * or <http://www.sourcemod.net/license.php>.

 *

 * Version: $Id$

 */

#include <ITextParsers.h>

#include "CoreConfig.h"

#include "sourcemod.h"

#include "sourcemm_api.h"

#include "sm_srvcmds.h"

#include "sm_version.h"

#include "sm_stringutil.h"

#include "LibrarySys.h"

#include "Logger.h"

#include "PluginSys.h"

#include "ForwardSys.h"

#include "frame_hooks.h"

#ifdef PLATFORM_WINDOWS

ConVar sm_corecfgfile("sm_corecfgfile", "addons\\sourcemod\\configs\\core.cfg", 0, "SourceMod core configuration file");

#elif defined PLATFORM_LINUX

ConVar sm_corecfgfile("sm_corecfgfile", "addons/sourcemod/configs/core.cfg", 0, "SourceMod core configuration file");

#endif

IForward *g_pOnServerCfg = NULL;

IForward *g_pOnConfigsExecuted = NULL;

IForward *g_pOnAutoConfigsBuffered = NULL;

CoreConfig g_CoreConfig;

bool g_bConfigsExecd = false;

bool g_bServerExecd = false;

bool g_bGotServerStart = false;

bool g_bGotTrigger = false;

ConCommand *g_pExecPtr = NULL;

ConVar *g_ServerCfgFile = NULL;

void CheckAndFinalizeConfigs();

#if SOURCE_ENGINE >= SE_ORANGEBOX

SH_DECL_EXTERN1_void(ConCommand, Dispatch, SH_NOATTRIB, false, const CCommand &);

void Hook_ExecDispatchPre(const CCommand &cmd)

#else

extern bool __SourceHook_FHAddConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);

extern bool __SourceHook_FHRemoveConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);

void Hook_ExecDispatchPre()

#endif

{

#if SOURCE_ENGINE == SE_EPISODEONE

	CCommand cmd;

#endif

	const char *arg = cmd.Arg(1);

	if (!g_bServerExecd 

		&& arg != NULL 

		&& strcmp(arg, g_ServerCfgFile->GetString()) == 0)

	{

		g_bGotTrigger = true;

	}

}

#if SOURCE_ENGINE >= SE_ORANGEBOX

void Hook_ExecDispatchPost(const CCommand &cmd)

#else

void Hook_ExecDispatchPost()

#endif

{

	if (g_bGotTrigger)

	{

		g_bGotTrigger = false;

		g_bServerExecd = true;

		CheckAndFinalizeConfigs();

	}

}

void CheckAndFinalizeConfigs()

{

	if ((g_bServerExecd || g_ServerCfgFile == NULL) 

		&& g_bGotServerStart)

	{

#if SOURCE_ENGINE >= SE_ORANGEBOX

        g_PendingInternalPush = true;

#else

        SM_InternalCmdTrigger();

#endif

	}

}

void CoreConfig::OnSourceModAllInitialized()

{

	g_RootMenu.AddRootConsoleCommand("config", "Set core configuration options", this);

	g_pOnServerCfg = g_Forwards.CreateForward("OnServerCfg", ET_Ignore, 0, NULL);

	g_pOnConfigsExecuted = g_Forwards.CreateForward("OnConfigsExecuted", ET_Ignore, 0, NULL);

	g_pOnAutoConfigsBuffered = g_Forwards.CreateForward("OnAutoConfigsBuffered", ET_Ignore, 0, NULL);

}

void CoreConfig::OnSourceModShutdown()

{

	g_RootMenu.RemoveRootConsoleCommand("config", this);

	g_Forwards.ReleaseForward(g_pOnServerCfg);

	g_Forwards.ReleaseForward(g_pOnConfigsExecuted);

	g_Forwards.ReleaseForward(g_pOnAutoConfigsBuffered);

	if (g_pExecPtr != NULL)

	{

		SH_REMOVE_HOOK_STATICFUNC(ConCommand, Dispatch, g_pExecPtr, Hook_ExecDispatchPre, false);

		SH_REMOVE_HOOK_STATICFUNC(ConCommand, Dispatch, g_pExecPtr, Hook_ExecDispatchPost, true);

		g_pExecPtr = NULL;

	}

}

void CoreConfig::OnSourceModLevelChange(const char *mapName)

{

	static bool already_checked = false;

	if (!already_checked)

	{

		if (engine->IsDedicatedServer())

		{

			g_ServerCfgFile = icvar->FindVar("servercfgfile");

		}

		else

		{

			g_ServerCfgFile = icvar->FindVar("lservercfgfile");

		}

		if (g_ServerCfgFile != NULL)

		{

			g_pExecPtr = FindCommand("exec");

			if (g_pExecPtr != NULL)

			{

				SH_ADD_HOOK_STATICFUNC(ConCommand, Dispatch, g_pExecPtr, Hook_ExecDispatchPre, false);

				SH_ADD_HOOK_STATICFUNC(ConCommand, Dispatch, g_pExecPtr, Hook_ExecDispatchPost, true);

			}

			else

			{

				g_ServerCfgFile = NULL;

			}

		}

		already_checked = true;

	}

	g_bConfigsExecd = false;

	g_bServerExecd = false;

	g_bGotServerStart = false;

	g_bGotTrigger = false;

}

void CoreConfig::OnRootConsoleCommand(const char *cmdname, const CCommand &command)

{

	int argcount = command.ArgC();

	if (argcount >= 4)

	{

		const char *option = command.Arg(2);

		const char *value = command.Arg(3);

		char error[255];

		ConfigResult res = SetConfigOption(option, value, ConfigSource_Console, error, sizeof(error));

		if (res == ConfigResult_Reject)

		{

			g_RootMenu.ConsolePrint("[SM] Could not set config option \"%s\" to \"%s\" (%s)", option, value, error);

		} else if (res == ConfigResult_Ignore) {

			g_RootMenu.ConsolePrint("[SM] No such config option \"%s\" exists.", option);

		} else {

			g_RootMenu.ConsolePrint("Config option \"%s\" successfully set to \"%s.\"", option, value);

		}

		return;

	}

	g_RootMenu.ConsolePrint("[SM] Usage: sm config <option> <value>");

}

void CoreConfig::Initialize()

{

	SMCError err;

	char filePath[PLATFORM_MAX_PATH];

	/* Try to get command line value of core config convar */

	const char *corecfg = icvar->GetCommandLineValue("sm_corecfgfile");

	/* If sm_corecfgfile not specified on command line, use default value */

	if (!corecfg)

	{

		corecfg = sm_corecfgfile.GetDefault();

	}

	/* Format path to config file */

	g_LibSys.PathFormat(filePath, sizeof(filePath), "%s/%s", g_SourceMod.GetGamePath(), corecfg);

	/* Parse config file */

	if ((err=textparsers->ParseFile_SMC(filePath, this, NULL)) != SMCError_Okay)

	{

 		/* :TODO: This won't actually log or print anything :( - So fix that somehow */

		const char *error = textparsers->GetSMCErrorString(err);

		g_Logger.LogFatal("[SM] Error encountered parsing core config file: %s", error ? error : "");

	}

}

SMCResult CoreConfig::ReadSMC_KeyValue(const SMCStates *states, const char *key, const char *value)

{

	char error[255];

	ConfigResult err = SetConfigOption(key, value, ConfigSource_File, error, sizeof(error));

	if (err == ConfigResult_Reject)

	{

		/* This is a fatal error */

		g_Logger.LogFatal("Config error (key: %s) (value: %s) %s", key, value, error);

	}

	return SMCResult_Continue;

}

ConfigResult CoreConfig::SetConfigOption(const char *option, const char *value, ConfigSource source, char *error, size_t maxlength)

{

	ConfigResult result;

	/* Notify! */

	SMGlobalClass *pBase = SMGlobalClass::head;

	while (pBase)

	{

		if ((result = pBase->OnSourceModConfigChanged(option, value, source, error, maxlength)) != ConfigResult_Ignore)

		{

			return result;

		}

		pBase = pBase->m_pGlobalClassNext;

	}

	return ConfigResult_Ignore;

}

bool SM_AreConfigsExecuted()

{

	return g_bConfigsExecd;

}

inline bool IsPathSepChar(char c)

{

#if defined PLATFORM_WINDOWS

	return (c == '\\' || c == '/');

#elif defined PLATFORM_LINUX

	return (c == '/');

#endif

}

bool SM_ExecuteConfig(CPlugin *pl, AutoConfig *cfg, bool can_create)

{

	bool will_create = false;

	/* See if we should be creating */

	if (can_create && cfg->create)

	{

		will_create = true;

		/* If the folder does not exist, attempt to create it.  

		 * We're awfully nice.

		 */

		const char *folder = cfg->folder.c_str();

		char path[PLATFORM_MAX_PATH];

		char build[PLATFORM_MAX_PATH];

		g_SourceMod.BuildPath(Path_Game, path, sizeof(path), "cfg/%s", folder);

		if (!g_LibSys.IsPathDirectory(path))

		{

			char *cur_ptr = path;

			size_t len;

			g_LibSys.PathFormat(path, sizeof(path), "%s", folder);

			len = g_SourceMod.BuildPath(Path_Game, build, sizeof(build), "cfg");

			do

			{

				/* Find next suitable path */

				char *next_ptr = cur_ptr;

				while (*next_ptr != '\0')

				{

					if (IsPathSepChar(*next_ptr))

					{

						*next_ptr = '\0';

						next_ptr++;

						break;

					}

					next_ptr++;

				}

				if (*next_ptr == '\0')

				{

					next_ptr = NULL;

				}

				len += g_LibSys.PathFormat(&build[len], 

					sizeof(build)-len,

					"/%s",

					cur_ptr);

				if (!g_LibSys.CreateFolder(build))

				{

					break;

				}

				cur_ptr = next_ptr;

			} while (cur_ptr);

		}

	}

	/* Check if the file exists. */

	char file[PLATFORM_MAX_PATH];

	char local[PLATFORM_MAX_PATH];

	if (cfg->folder.size())

	{

		g_LibSys.PathFormat(local, 

			sizeof(local), 

			"%s/%s.cfg",

			cfg->folder.c_str(),

			cfg->autocfg.c_str());

	} else {

		g_LibSys.PathFormat(local,

			sizeof(local),

			"%s.cfg",

			cfg->autocfg.c_str());

	}

	g_SourceMod.BuildPath(Path_Game, file, sizeof(file), "cfg/%s", local);

	bool file_exists = g_LibSys.IsPathFile(file);

	if (!file_exists && will_create)

	{

		List<const ConVar *> *convars = NULL;

		if (pl->GetProperty("ConVarList", (void **)&convars, false) && convars)

		{

			/* Attempt to create it */

			FILE *fp = fopen(file, "wt");

			if (fp)

			{

				fprintf(fp, "// This file was auto-generated by SourceMod (v%s)\n", SVN_FULL_VERSION);

				fprintf(fp, "// ConVars for plugin \"%s\"\n", pl->GetFilename());

				fprintf(fp, "\n\n");

				List<const ConVar *>::iterator iter;

				float x;

				for (iter = convars->begin(); iter != convars->end(); iter++)

				{

					const ConVar *cvar = (*iter);

					if ((cvar->GetFlags() & FCVAR_DONTRECORD) == FCVAR_DONTRECORD)

					{

						continue;

					}

					char descr[255];

					char *dptr = descr;

					/* Print comments until there is no more */

					strncopy(descr, cvar->GetHelpText(), sizeof(descr));

					while (*dptr != '\0')

					{

						/* Find the next line */

						char *next_ptr = dptr;

						while (*next_ptr != '\0')

						{

							if (*next_ptr == '\n')

							{

								*next_ptr = '\0';

								next_ptr++;

								break;

							}

							next_ptr++;

						}

						fprintf(fp, "// %s\n", dptr);

						dptr = next_ptr;

					}

					fprintf(fp, "// -\n");

					fprintf(fp, "// Default: \"%s\"\n", cvar->GetDefault());

					if (cvar->GetMin(x))

					{

						fprintf(fp, "// Minimum: \"%02f\"\n", x);

					}

					if (cvar->GetMax(x))

					{

						fprintf(fp, "// Maximum: \"%02f\"\n", x);

					}

					fprintf(fp, "%s \"%s\"\n", cvar->GetName(), cvar->GetDefault());

					fprintf(fp, "\n");

				}

				fprintf(fp, "\n");

				file_exists = true;

				can_create = false;

				fclose(fp);

			}

		}

	}

	if (file_exists)

	{

		char cmd[255];

		UTIL_Format(cmd, sizeof(cmd), "exec %s\n", local);

		engine->ServerCommand(cmd);

	}

	return can_create;

}

void SM_DoSingleExecFwds(IPluginContext *ctx)

{

	IPluginFunction *pf;

	if ((pf = ctx->GetFunctionByName("OnServerCfg")) != NULL)

	{

		pf->Execute(NULL);

	}

	if ((pf = ctx->GetFunctionByName("OnConfigsExecuted")) != NULL)

	{

		pf->Execute(NULL);

	}

}

void SM_ConfigsExecuted_Plugin(unsigned int serial)

{

	IPluginIterator *iter = g_PluginSys.GetPluginIterator();

	while (iter->MorePlugins())

	{

		CPlugin *plugin = (CPlugin *)(iter->GetPlugin());

		if (plugin->GetSerial() == serial)

		{

			SM_DoSingleExecFwds(plugin->GetBaseContext());

			break;

		}

		iter->NextPlugin();

	}

	iter->Release();

}

void SM_ExecuteForPlugin(IPluginContext *ctx)

{

	CPlugin *plugin = (CPlugin *)g_PluginSys.GetPluginByCtx(ctx->GetContext());

	unsigned int num = plugin->GetConfigCount();

	if (!num)

	{

		SM_DoSingleExecFwds(ctx);

	}

	else

	{

		bool can_create = true;

		for (unsigned int i=0; i<num; i++)

		{

			can_create = SM_ExecuteConfig(plugin, plugin->GetConfig(i), can_create);

		}

		char cmd[255];

		UTIL_Format(cmd, sizeof(cmd), "sm internal 2 %d\n", plugin->GetSerial());

		engine->ServerCommand(cmd);

	}

}

void SM_ExecuteAllConfigs()

{

	if (g_bGotServerStart)

	{

		return;

	}

	engine->ServerCommand("exec sourcemod/sourcemod.cfg\n");

	IPluginIterator *iter = g_PluginSys.GetPluginIterator();

	while (iter->MorePlugins())

	{

		CPlugin *plugin = (CPlugin *)(iter->GetPlugin());

		unsigned int num = plugin->GetConfigCount();

		bool can_create = true;

		for (unsigned int i=0; i<num; i++)

		{

			can_create = SM_ExecuteConfig(plugin, plugin->GetConfig(i), can_create);

		}

		iter->NextPlugin();

	}

	iter->Release();

	g_bGotServerStart = true;

	CheckAndFinalizeConfigs();

}

void SM_ConfigsExecuted_Global()

{

	if (g_bConfigsExecd)

	{

		return;

	}

	g_bConfigsExecd = true;

	g_pOnServerCfg->Execute(NULL);

	g_pOnConfigsExecuted->Execute(NULL);

}

void SM_InternalCmdTrigger()

{

	/* Order is important here.  We need to buffer things before we send the command out. */

	g_pOnAutoConfigsBuffered->Execute(NULL);

	engine->ServerCommand("sm internal 1\n");

    g_PendingInternalPush = false;

}