/*
 * This file is a part of Winix
 * and is distributed under the 2-Clause BSD licence.
 * Author: Tomasz Sowa <t.sowa@ttmath.org>
 */

/* 
 * Copyright (c) 2011-2021, Tomasz Sowa
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 */
 
#include <signal.h>
#include "threadmanager.h"
#include "log.h"


namespace Winix
{




ThreadManager::ThreadManager()
{
	were_started = false;
}


//void ThreadManager::SetSynchro(Synchro * psynchro)
//{
//	synchro = psynchro;
//}


void ThreadManager::Init()
{
sigset_t set;

	sigemptyset(&set);
	sigaddset(&set, SIGTERM);
	sigaddset(&set, SIGINT);

	// blocking SIGTERM and SIGINT
	// new threads will have the signals blocked too
	pthread_sigmask(SIG_BLOCK, &set, 0);
}



void ThreadManager::Add(BaseThread * pbase, const wchar_t * thread_name)
{
	thread_tab.emplace_back();
	ThreadItem & item = thread_tab.back();
	item.thread_item_data = new ThreadItemData();
	ThreadItemData & data = *item.thread_item_data;

	item.object = pbase;
	item.name   = thread_name;
	item.object->set_dependency(this);

	// main log buffer (from the main thread)
	item.object->set_main_log_buffer(log.get_log_buffer());
	item.object->set_main_file_log(log.get_file_log());

	// the logger buffer and model_connector are different
	item.object->set_log_buffer(&data.log_buffer);

	//data.postgresql_connector.set_logger(logger);
	data.postgresql_connector.set_conn_param(config->db_database, config->db_user, config->db_pass);
	data.postgresql_connector.set_logger(item.object->get_logger());
	data.postgresql_connector.set_log_queries(config->log_db_query);
	data.postgresql_connector.wait_for_connection();
	data.model_connector.set_db_connector(data.postgresql_connector);
	data.model_connector.set_flat_connector(data.json_connector);
	data.model_connector.set_logger(item.object->get_logger());
	data.model_connector.set_winix_config(config);
	data.model_connector.set_winix_request(nullptr);
	data.model_connector.set_winix_logger(item.object->get_logger());
	data.model_connector.set_winix_dirs(nullptr);
	data.model_connector.set_winix_mounts(nullptr);
	data.model_connector.set_winix_users(nullptr);
	data.model_connector.set_winix_groups(nullptr);
	data.model_connector.set_winix_session_logger(nullptr);
	data.model_connector.set_winix_session(nullptr);
	data.model_connector.set_winix_locale(nullptr); // null for a moment, may will be changed
	data.model_connector.set_winix_session_manager(nullptr);// null for a moment, may will be changed
	data.model_connector.set_winix_time_zones(nullptr); // null for a moment, may will be changed
	data.model_connector.set_winix_pattern_cacher(nullptr); // null for a moment, may will be changed

	item.object->set_model_connector(&data.model_connector);

	if( were_started )
	{
		Start(thread_tab.size() - 1, &thread_tab.back());
	}
	else
	{
		log << log4 << "TM: added a thread to the queue, number: " << (thread_tab.size()-1)
			<< ", name: " << thread_name << logend;
	}
}


void ThreadManager::Add(BaseThread & pbase, const wchar_t * thread_name)
{
	Add(&pbase, thread_name);
}


void ThreadManager::Add(BaseThread * pbase, const std::wstring & thread_name)
{
	Add(pbase, thread_name.c_str());
}

void ThreadManager::Add(BaseThread & pbase, const std::wstring & thread_name)
{
	Add(&pbase, thread_name.c_str());
}



void ThreadManager::StartAll()
{
	Winix::Lock lock(synchro);
	int id = 0;

	for(ThreadItem & item : thread_tab)
	{
		Start(id, &item);
		id += 1;
	}

	lock.Unlock();

	were_started = true;
}


void ThreadManager::Start(int id, ThreadItem * item)
{
	if( item->object->StartThread() )
	{
		log << log4 << "TM: thread " << id << " (" << item->object->ThreadId() << ", name: "
			<< item->name << ") started" << logend;
	}
	else
	{
		log << log4 << "TM: cannot run a thread " << id << ", name: " << item->name << logend;
	}
}


void ThreadManager::StopAll()
{
	if( !were_started )
		return;

	{
		Winix::Lock lock(synchro);

		for(ThreadItem & item : thread_tab)
		{
			// WakeUpThread() should be used with Lock/Unlock
			item.object->WakeUpThread();
		}
	}

	int id = 0;

	for(ThreadItem & item : thread_tab)
	{
		log << log4 << "TM: waiting for thread " << id << " (" << item.object->ThreadId()
			<< ", name: " << item.name << ")" << logend << logsave;

		item.object->WaitForThread();
		log << log4 << "TM: thread " << id << " terminated" << logend << logsave;

		// the thread is stopped and we can set the thread log buffer pointing to
		// the main log buffer (from the main thread)
		item.object->set_log_buffer(log.get_log_buffer());

		delete item.thread_item_data;
		item.thread_item_data = nullptr;
		id += 1;
	}

	thread_tab.clear();
}




} // namespace Winix