/*	EQEmu: EQEmulator

	Copyright (C) 2001-2026 EQEmu Development Team

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 3 of the License, or
	(at your option) any later version.

	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/>.
*/
#include "shared_memory/items.h"
#include "shared_memory/spells.h"
#include "common/content/world_content_service.h"
#include "common/crash.h"
#include "common/eqemu_config.h"
#include "common/eqemu_exception.h"
#include "common/eqemu_logsys.h"
#include "common/events/player_event_logs.h"
#include "common/evolving_items.h"
#include "common/path_manager.h"
#include "common/platform.h"
#include "common/rulesys.h"
#include "common/shareddb.h"
#include "common/strings.h"
#include "common/zone_store.h"

#include <cstdio>
#ifdef _WINDOWS
#include <direct.h>
#else
#include <unistd.h>
#endif
#include <sys/stat.h>

inline bool MakeDirectory(const std::string &directory_name)
{
#ifdef _WINDOWS
	struct _stat st;
	if (_stat(directory_name.c_str(), &st) == 0) {
		return false;
	}
	else {
		_mkdir(directory_name.c_str());
		return true;
	}

#else
	struct stat st;
	if (stat(directory_name.c_str(), &st) == 0) {
		return false;
	}
	else {
		mkdir(directory_name.c_str(), 0755);
		return true;
	}

#endif
	return false;
}

int main(int argc, char **argv)
{
	RegisterExecutablePlatform(ExePlatformSharedMemory);
	EQEmuLogSys::Instance()->LoadLogSettingsDefaults();
	set_exception_handler();

	PathManager::Instance()->Init();

	LogInfo("Shared Memory Loader Program");
	if (!EQEmuConfig::LoadConfig()) {
		LogError("Unable to load configuration file");
		return 1;
	}

	auto Config = EQEmuConfig::get();

	SharedDatabase database;
	SharedDatabase content_db;
	LogInfo("Connecting to database");
	if (!database.Connect(
		Config->DatabaseHost.c_str(),
		Config->DatabaseUsername.c_str(),
		Config->DatabasePassword.c_str(),
		Config->DatabaseDB.c_str(),
		Config->DatabasePort
	)) {
		LogError("Unable to connect to the database, cannot continue without a database connection");
		return 1;
	}

	/**
	 * Multi-tenancy: Content database
	 */
	if (!Config->ContentDbHost.empty()) {
		if (!content_db.Connect(
			Config->ContentDbHost.c_str() ,
			Config->ContentDbUsername.c_str(),
			Config->ContentDbPassword.c_str(),
			Config->ContentDbName.c_str(),
			Config->ContentDbPort
		)) {
			LogError("Cannot continue without a content database connection");
			return 1;
		}
	} else {
		content_db.SetMySQL(database);
	}

	EQEmuLogSys::Instance()->SetDatabase(&database)
		->SetLogPath(PathManager::Instance()->GetLogPath())
		->LoadLogDatabaseSettings()
		->StartFileLogs();

	std::string shared_mem_directory = Config->SharedMemDir;
	if (MakeDirectory(shared_mem_directory)) {
		LogInfo("Shared Memory folder doesn't exist, so we created it [{}]", shared_mem_directory.c_str());
	}

	database.LoadVariables();

	/* If we're running shared memory and hotfix has no custom name, we probably want to start from scratch... */
	std::string db_hotfix_name;
	if (database.GetVariable("hotfix_name", db_hotfix_name)) {
		if (!db_hotfix_name.empty() && strcasecmp("hotfix_", db_hotfix_name.c_str()) == 0) {
			LogInfo("Current hotfix in variables is the default [{}], clearing out variable", db_hotfix_name.c_str());
			std::string query = StringFormat("UPDATE `variables` SET `value`='' WHERE (`varname`='hotfix_name')");
			database.QueryDatabase(query);
		}
	}

	/**
	 * Rules: TODO: Remove later
	 */
	{
		std::string tmp;
		if (database.GetVariable("RuleSet", tmp)) {
			LogInfo("Loading rule set [{}]", tmp.c_str());
			if (!RuleManager::Instance()->LoadRules(&database, tmp.c_str(), false)) {
				LogError("Failed to load ruleset [{}], falling back to defaults", tmp.c_str());
			}
		}
		else {
			if (!RuleManager::Instance()->LoadRules(&database, "default", false)) {
				LogInfo("No rule set configured, using default rules");
			}
		}

		EQ::InitializeDynamicLookups();
	}


	WorldContentService::Instance()->SetCurrentExpansion(RuleI(Expansion, CurrentExpansion));
	WorldContentService::Instance()->SetDatabase(&database)
		->SetContentDatabase(&content_db)
		->SetExpansionContext()
		->ReloadContentFlags();

	LogInfo(
		"Current expansion is [{}] ({})",
		WorldContentService::Instance()->GetCurrentExpansion(),
		WorldContentService::Instance()->GetCurrentExpansionName()
	);

	std::string hotfix_name = "";

	bool load_all        = true;
	bool load_items      = false;
	bool load_loot       = false;
	bool load_spells     = false;

	if (argc > 1) {
		for (int i = 1; i < argc; ++i) {
			switch (argv[i][0]) {
				case 'i':
					if (strcasecmp("items", argv[i]) == 0) {
						load_items = true;
						load_all   = false;
					}
					break;

				case 's':
					if (strcasecmp("spells", argv[i]) == 0) {
						load_spells = true;
						load_all    = false;
					}
					break;
				case '-': {
					auto split = Strings::Split(argv[i], '=');
					if (split.size() >= 2) {
						auto command  = split[0];
						auto argument = split[1];
						if (strcasecmp("-hotfix", command.c_str()) == 0) {
							hotfix_name = argument;
							load_all    = true;
						}
					}
					break;
				}
			}
		}
	}

	if (hotfix_name.length() > 0) {
		LogInfo("Writing data for hotfix [{}]", hotfix_name.c_str());
	}

	if (load_all || load_items) {
		LogInfo("Loading items");
		try {
			LoadItems(&content_db, hotfix_name);
		} catch (std::exception &ex) {
			LogError("{}", ex.what());
			return 1;
		}
	}

	if (load_all || load_spells) {
		LogInfo("Loading spells");
		try {
			LoadSpells(&content_db, hotfix_name);
		} catch (std::exception &ex) {
			LogError("{}", ex.what());
			return 1;
		}
	}

	EQEmuLogSys::Instance()->CloseFileLogs();
	return 0;
}