/*
Minetest-c55
Copyright (C) 2010-2011 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 "player.h"
#include "constants.h"
#include "gamedef.h"
#include "connection.h" // PEER_ID_INEXISTENT
#include "settings.h"
#include "content_sao.h"
#include "util/numeric.h"

Player::Player(IGameDef *gamedef):
	touching_ground(false),
	in_water(false),
	in_water_stable(false),
	is_climbing(false),
	swimming_up(false),
	camera_barely_in_ceiling(false),
	inventory(gamedef->idef()),
	hp(PLAYER_MAX_HP),
	peer_id(PEER_ID_INEXISTENT),
// protected
	m_gamedef(gamedef),
	m_pitch(0),
	m_yaw(0),
	m_speed(0,0,0),
	m_position(0,0,0)
{
	updateName("<not set>");
	inventory.clear();
	inventory.addList("main", PLAYER_INVENTORY_SIZE);
	inventory.addList("craft", 9);
	inventory.addList("craftpreview", 1);
	inventory.addList("craftresult", 1);
}

Player::~Player()
{
}

// Y direction is ignored
void Player::accelerate(v3f target_speed, f32 max_increase)
{
	v3f d_wanted = target_speed - m_speed;
	d_wanted.Y = 0;
	f32 dl_wanted = d_wanted.getLength();
	f32 dl = dl_wanted;
	if(dl > max_increase)
		dl = max_increase;
	
	v3f d = d_wanted.normalize() * dl;

	m_speed.X += d.X;
	m_speed.Z += d.Z;
	//m_speed += d;

#if 0 // old code
	if(m_speed.X < target_speed.X - max_increase)
		m_speed.X += max_increase;
	else if(m_speed.X > target_speed.X + max_increase)
		m_speed.X -= max_increase;
	else if(m_speed.X < target_speed.X)
		m_speed.X = target_speed.X;
	else if(m_speed.X > target_speed.X)
		m_speed.X = target_speed.X;

	if(m_speed.Z < target_speed.Z - max_increase)
		m_speed.Z += max_increase;
	else if(m_speed.Z > target_speed.Z + max_increase)
		m_speed.Z -= max_increase;
	else if(m_speed.Z < target_speed.Z)
		m_speed.Z = target_speed.Z;
	else if(m_speed.Z > target_speed.Z)
		m_speed.Z = target_speed.Z;
#endif
}

v3s16 Player::getLightPosition() const
{
	return floatToInt(m_position + v3f(0,BS+BS/2,0), BS);
}

void Player::serialize(std::ostream &os)
{
	// Utilize a Settings object for storing values
	Settings args;
	args.setS32("version", 1);
	args.set("name", m_name);
	//args.set("password", m_password);
	args.setFloat("pitch", m_pitch);
	args.setFloat("yaw", m_yaw);
	args.setV3F("position", m_position);
	args.setS32("hp", hp);

	args.writeLines(os);

	os<<"PlayerArgsEnd\n";
	
	inventory.serialize(os);
}

void Player::deSerialize(std::istream &is)
{
	Settings args;
	
	for(;;)
	{
		if(is.eof())
			throw SerializationError
					("Player::deSerialize(): PlayerArgsEnd not found");
		std::string line;
		std::getline(is, line);
		std::string trimmedline = trim(line);
		if(trimmedline == "PlayerArgsEnd")
			break;
		args.parseConfigLine(line);
	}

	//args.getS32("version"); // Version field value not used
	std::string name = args.get("name");
	updateName(name.c_str());
	setPitch(args.getFloat("pitch"));
	setYaw(args.getFloat("yaw"));
	setPosition(args.getV3F("position"));
	try{
		hp = args.getS32("hp");
	}catch(SettingNotFoundException &e){
		hp = 20;
	}

	inventory.deSerialize(is);

	if(inventory.getList("craftpreview") == NULL)
	{
		// Convert players without craftpreview
		inventory.addList("craftpreview", 1);

		bool craftresult_is_preview = true;
		if(args.exists("craftresult_is_preview"))
			craftresult_is_preview = args.getBool("craftresult_is_preview");
		if(craftresult_is_preview)
		{
			// Clear craftresult
			inventory.getList("craftresult")->changeItem(0, ItemStack());
		}
	}
}

/*
	RemotePlayer
*/

void RemotePlayer::setPosition(const v3f &position)
{
	Player::setPosition(position);
	if(m_sao)
		m_sao->setBasePosition(position);
}