#include <system_error>
#elif USE_WIN_THREADS
	#ifndef _WIN32_WCE
		#include <process.h>
	#endif
#elif USE_POSIX_THREADS
	#include <time.h>
	#include <assert.h>
	#include <stdlib.h>
	#include <unistd.h>
	#include <sys/time.h>

	#if defined(__FreeBSD__) || defined(__APPLE__)
		#include <sys/types.h>
		#include <sys/sysctl.h>
	#elif defined(_GNU_SOURCE)
		#include <sys/sysinfo.h>
	#endif
#endif


// for setName
#if defined(__linux__)
	#include <sys/prctl.h>
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
	#include <pthread_np.h>
#elif defined(_MSC_VER)
	struct THREADNAME_INFO {
		DWORD dwType;     // Must be 0x1000
		LPCSTR szName;    // Pointer to name (in user addr space)
		DWORD dwThreadID; // Thread ID (-1=caller thread)
		DWORD dwFlags;    // Reserved for future use, must be zero
	};
#endif

// for bindToProcessor
#if __FreeBSD_version >= 702106
	typedef cpuset_t cpu_set_t;
#elif defined(__linux__)
	#include <sched.h>
#elif defined(__sun) || defined(sun)
	#include <sys/types.h>
	#include <sys/processor.h>
	#include <sys/procset.h>
#elif defined(_AIX)
	#include <sys/processor.h>
	#include <sys/thread.h>
#elif defined(__APPLE__)
	#include <mach/mach_init.h>
	#include <mach/thread_act.h>
#endif


Thread::Thread(const std::string &name) :
	m_name(name),
	m_retval(NULL),
	m_joinable(false),
	m_request_stop(false),
	m_running(false)
{
#ifdef _AIX
	m_kernel_thread_id = -1;
#endif
}


Thread::~Thread()
{
	kill();
}


bool Thread::start()
{
	MutexAutoLock lock(m_mutex);

	if (m_running)
		return false;

	m_request_stop = false;

#if USE_CPP11_THREADS

	try {
		m_thread_obj = new std::thread(threadProc, this);
	} catch (const std::system_error &e) {
		return false;
	}

#elif USE_WIN_THREADS

	m_thread_handle = CreateThread(NULL, 0, threadProc, this, 0, &m_thread_id);
	if (!m_thread_handle)
		return false;

#elif USE_POSIX_THREADS

	int status = pthread_create(&m_thread_handle, NULL, threadProc, this);
	if (status)
		return false;

#endif

	while (!m_running)
		sleep_ms(1);

	m_joinable = true;

	return true;
}


bool Thread::stop()
{
	m_request_stop = true;
	return true;
}


bool Thread::wait()
{
	MutexAutoLock lock(m_mutex);

	if (!m_joinable)
		return false;

#if USE_CPP11_THREADS

	m_thread_obj->join();

	delete m_thread_obj;
	m_thread_obj = NULL;

#elif USE_WIN_THREADS

	int ret = WaitForSingleObject(m_thread_handle, INFINITE);
	assert(ret == WAIT_OBJECT_0);
	UNUSED(ret);

	CloseHandle(m_thread_handle);
	m_thread_handle = NULL;
	m_thread_id = -1;

#elif USE_POSIX_THREADS

	int ret = pthread_join(m_thread_handle, NULL);
	assert(ret == 0);
	UNUSED(ret);

#endif

	assert(m_running == false);
	m_joinable = false;
	return true;
}


bool Thread::kill()
{
	if (!m_running) {
		wait();
		return false;
	}

	m_running = false;

#if USE_WIN_THREADS
	TerminateThread(m_thread_handle, 0);
	CloseHandle(m_thread_handle);
#else
	// We need to pthread_kill instead on Android since NDKv5's pthread
	// implementation is incomplete.
# ifdef __ANDROID__</*
Minetest
Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include <sstream>

#include "clientiface.h"
#include "util/numeric.h"
#include "remoteplayer.h"
#include "settings.h"
#include "mapblock.h"
#include "network/connection.h"
#include "serverenvironment.h"
#include "map.h"
#include "emerge.h"
#include "content_sao.h"              // TODO this is used for cleanup of only
#include "log.h"
#include "network/serveropcodes.h"
#include "util/srp.h"

const char *ClientInterface::statenames[] = {
	"Invalid",
	"Disconnecting",
	"Denied",
	"Created",
	"AwaitingInit2",
	"HelloSent",
	"InitDone",
	"DefinitionsSent",
	"Active",
	"SudoMode",
};



std::string ClientInterface::state2Name(ClientState state)
{
	return statenames[state];
}

void RemoteClient::ResendBlockIfOnWire(v3s16 p)
{
	// if this block is on wire, mark it for sending again as soon as possible
	if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
		SetBlockNotSent(p);
	}
}

void RemoteClient::GetNextBlocks (
		ServerEnvironment *env,
		EmergeManager * emerge,
		float dtime,
		std::vector<PrioritySortedBlockTransfer> &dest)
{
	DSTACK(FUNCTION_NAME);


	// Increment timers
	m_nothing_to_send_pause_timer -= dtime;
	m_nearest_unsent_reset_timer += dtime;

	if(m_nothing_to_send_pause_timer >= 0)
		return;

	RemotePlayer *player = env->getPlayer(peer_id);
	// This can happen sometimes; clients and players are not in perfect sync.
	if (player == NULL)
		return;

	PlayerSAO *sao = player->getPlayerSAO();
	if (sao == NULL)
		return;

	// Won't send anything if already sending
	if(m_blocks_sending.size() >= g_settings->getU16
			("max_simultaneous_block_sends_per_client"))
	{
		//infostream<<"Not sending any blocks, Queue full."<<std::endl;
		return;
	}

	v3f playerpos = sao->getBasePosition();
	v3f playerspeed = player->getSpeed();
	v3f playerspeeddir(0,0,0);
	if(playerspeed.getLength() > 1.0*BS)
		playerspeeddir = playerspeed / playerspeed.getLength();
	// Predict to next block
	v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;

	v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);

	v3s16 center = getNodeBlockPos(center_nodepos);

	// Camera position and direction
	v3f camera_pos = sao->getEyePosition();
	v3f camera_dir = v3f(0,0,1);
	camera_dir.rotateYZBy(sao->getPitch());
	camera_dir.rotateXZBy(sao->getYaw());

	/*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
			<<camera_dir.Z<<")"<<std::endl;*/

	/*
		Get the starting value of the block finder radius.
	*/

	if(m_last_center != center)
	{
		m_nearest_unsent_d = 0;
		m_last_center = center;
	}

	/*infostream<<"m_nearest_unsent_reset_timer="
			<<m_nearest_unsent_reset_timer<<std::endl;*/

	// Reset periodically to workaround for some bugs or stuff
	if(m_nearest_unsent_reset_timer > 20.0)
	{
		m_nearest_unsent_reset_timer = 0;
		m_nearest_unsent_d = 0;
		//infostream<<"Resetting m_nearest_unsent_d for "
		//		<<server->getPlayerName(peer_id)<<std::endl;
	}

	//s16 last_nearest_unsent_d = m_nearest_unsent_d;
	s16 d_start =

	return bindprocessor(BINDTHREAD, m_kernel_thread_id, proc_number) == 0;

#elif defined(__hpux) || defined(hpux)

	pthread_spu_t answer;

	return pthread_processor_bind_np(PTHREAD_BIND_ADVISORY_NP,
			&answer, proc_number, getThreadHandle()) == 0;

#elif defined(__APPLE__)

	struct thread_affinity_policy tapol;

	thread_port_t threadport = pthread_mach_thread_np(getThreadHandle());
	tapol.affinity_tag = proc_number + 1;
	return thread_policy_set(threadport, THREAD_AFFINITY_POLICY,
			(thread_policy_t)&tapol,
			THREAD_AFFINITY_POLICY_COUNT) == KERN_SUCCESS;

#else

	return false;

#endif
}


bool Thread::setPriority(int prio)
{
#if USE_WIN_THREADS

	return SetThreadPriority(getThreadHandle(), prio);

#else

	struct sched_param sparam;
	int policy;

	if (pthread_getschedparam(getThreadHandle(), &policy, &sparam) != 0)
		return false;

	int min = sched_get_priority_min(policy);
	int max = sched_get_priority_max(policy);

	sparam.sched_priority = min + prio * (max - min) / THREAD_PRIORITY_HIGHEST;
	return pthread_setschedparam(getThreadHandle(), policy, &sparam) == 0;

#endif
}