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/*
Minetest
Copyright (C) 2010-2013 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.
*/

#pragma once

#include "irrlichttypes_bloated.h"
#include "inventory.h"
#include "constants.h"
#include "network/networkprotocol.h"
#include "util/basic_macros.h"
#include <list>
#include <mutex>

#define PLAYERNAME_SIZE 20

#define PLAYERNAME_ALLOWED_CHARS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_"
#define PLAYERNAME_ALLOWED_CHARS_USER_EXPL "'a' to 'z', 'A' to 'Z', '0' to '9', '-', '_'"

struct PlayerControl
{
	PlayerControl() = default;

	PlayerControl(
		bool a_up,
		bool a_down,
		bool a_left,
		bool a_right,
		bool a_jump,
		bool a_aux1,
		bool a_sneak,
		bool a_zoom,
		bool a_LMB,
		bool a_RMB,
		float a_pitch,
		float a_yaw,
		float a_sidew_move_joystick_axis,
		float a_forw_move_joystick_axis
	)
	{
		up = a_up;
		down = a_down;
		left = a_left;
		right = a_right;
		jump = a_jump;
		aux1 = a_aux1;
		sneak = a_sneak;
		zoom = a_zoom;
		LMB = a_LMB;
		RMB = a_RMB;
		pitch = a_pitch;
		yaw = a_yaw;
		sidew_move_joystick_axis = a_sidew_move_joystick_axis;
		forw_move_joystick_axis = a_forw_move_joystick_axis;
	}
	bool up = false;
	bool down = false;
	bool left = false;
	bool right = false;
	bool jump = false;
	bool aux1 = false;
	bool sneak = false;
	bool zoom = false;
	bool LMB = false;
	bool RMB = false;
	float pitch = 0.0f;
	float yaw = 0.0f;
	float sidew_move_joystick_axis = 0.0f;
	float forw_move_joystick_axis = 0.0f;
};

struct PlayerSettings
{
	bool free_move = false;
	bool pitch_move = false;
	bool fast_move = false;
	bool continuous_forward = false;
	bool always_fly_fast = false;
	bool aux1_descends = false;
	bool noclip = false;
	bool autojump = false;

	const std::string setting_names[8] = {
		"free_move", "pitch_move", "fast_move", "continuous_forward", "always_fly_fast",
		"aux1_descends", "noclip", "autojump"
	};
	void readGlobalSettings();
};

class Map;
struct CollisionInfo;
struct HudElement;
class Environment;

class Player
{
public:

	Player(const char *name, IItemDefManager *idef);
	virtual ~Player() = 0;

	DISABLE_CLASS_COPY(Player);

	virtual void move(f32 dtime, Environment *env, f32 pos_max_d)
	{}
	virtual void move(f32 dtime, Environment *env, f32 pos_max_d,
			std::vector<CollisionInfo> *collision_info)
	{}

	const v3f &getSpeed() const
	{
		return m_speed;
	}

	void setSpeed(const v3f &speed)
	{
		m_speed = speed;
	}

	const char *getName() const { return m_name; }

	u32 getFreeHudID()
	{
		size_t size = hud.size();
		for (size_t i = 0; i != size; i++) {
			if (!hud[i])
				return i;
		}
		return size;
	}

	v3f eye_offset_first;
	v3f eye_offset_third;

	Inventory inventory;

	f32 movement_acceleration_default;
	f32 movement_acceleration_air;
	f32 movement_acceleration_fast;
	f32 movement_speed_walk;
	f32 movement_speed_crouch;
	f32 movement_speed_fast;
	f32 movement_speed_climb;
	f32 movement_speed_jump;
	f32 movement_liquid_fluidity;
	f32 movement_liquid_fluidity_smooth;
	f32 movement_liquid_sink;
	f32 movement_gravity;

	v2s32 local_animations[4];
	float local_animation_speed;

	std::string inventory_formspec;
	std::string formspec_prepend;

	PlayerControl control;
	const PlayerControl& getPlayerControl() { return control; }
	PlayerSettings &getPlayerSettings() { return m_player_settings; }
	static void settingsChangedCallback(const std::string &name, void *data);

	u32 keyPressed = 0;

	HudElement* getHud(u32 id);
	u32         addHud(HudElement* hud);
	HudElement* removeHud(u32 id);
	void        clearHud();

	u32 hud_flags;
	s32 hud_hotbar_itemcount;
protected:
	char m_name[PLAYERNAME_SIZE];
	v3f m_speed;

	std::vector<HudElement *> hud;
private:
	// Protect some critical areas
	// hud for example can be modified by EmergeThread
	// and ServerThread
	std::mutex m_mutex;
	PlayerSettings m_player_settings;
};
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/*
Minetest
Copyright (C) 2010-2013 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 "settings.h"
#include "irrlichttypes_bloated.h"
#include "exceptions.h"
#include "threading/mutex_auto_lock.h"
#include "util/strfnd.h"
#include <iostream>
#include <fstream>
#include <sstream>
#include "debug.h"
#include "log.h"
#include "util/serialize.h"
#include "filesys.h"
#include "noise.h"
#include <cctype>
#include <algorithm>

static Settings main_settings;
Settings *g_settings = &main_settings;
std::string g_settings_path;

Settings::~Settings()
{
	clear();
}


Settings & Settings::operator += (const Settings &other)
{
	update(other);

	return *this;
}


Settings & Settings::operator = (const Settings &other)
{
	if (&other == this)
		return *this;

	MutexAutoLock lock(m_mutex);
	MutexAutoLock lock2(other.m_mutex);

	clearNoLock();
	updateNoLock(other);

	return *this;
}


bool Settings::checkNameValid(const std::string &name)
{
	bool valid = name.find_first_of("=\"{}#") == std::string::npos;
	if (valid) valid = trim(name) == name;
	if (!valid) {
		errorstream << "Invalid setting name \"" << name << "\""
			<< std::endl;
		return false;
	}
	return true;
}


bool Settings::checkValueValid(const std::string &value)
{
	if (value.substr(0, 3) == "\"\"\"" ||
		value.find("\n\"\"\"") != std::string::npos) {
		errorstream << "Invalid character sequence '\"\"\"' found in"
			" setting value!" << std::endl;
		return false;
	}
	return true;
}

std::string Settings::getMultiline(std::istream &is, size_t *num_lines)
{
	size_t lines = 1;
	std::string value;
	std::string line;

	while (is.good()) {
		lines++;
		std::getline(is, line);
		if (line == "\"\"\"")
			break;
		value += line;
		value.push_back('\n');
	}

	size_t len = value.size();
	if (len)
		value.erase(len - 1);

	if (num_lines)
		*num_lines = lines;

	return value;
}


bool Settings::readConfigFile(const char *filename)
{
	std::ifstream is(filename);
	if (!is.good())
		return false;

	return parseConfigLines(is, "");
}


bool Settings::parseConfigLines(std::istream &is, const std::string &end)
{
	MutexAutoLock lock(m_mutex);

	std::string line, name, value;

	while (is.good()) {
		std::getline(is, line);
		SettingsParseEvent event = parseConfigObject(line, end, name, value);

		switch (event) {
		case SPE_NONE:
		case SPE_INVALID:
		case SPE_COMMENT:
			break;
		case SPE_KVPAIR:
			m_settings[name] = SettingsEntry(value);
			break;
		case SPE_END:
			return true;
		case SPE_GROUP: {
			Settings *group = new Settings;
			if (!group->parseConfigLines(is, "}")) {
				delete group;
				return false;
			}
			m_settings[name] = SettingsEntry(group);
			break;
		}
		case SPE_MULTILINE:
			m_settings[name] = SettingsEntry(getMultiline(is));
			break;
		}
	}

	return end.empty();
}


void Settings::writeLines(std::ostream &os, u32 tab_depth) const
{
	MutexAutoLock lock(m_mutex);

	for (SettingEntries::const_iterator it = m_settings.begin();
		 	it != m_settings.end(); ++it)
		printEntry(os, it->first, it->second, tab_depth);
}


void Settings::printEntry(std::ostream &os, const std::string &name,
	const SettingsEntry &entry, u32 tab_depth)
{
	for (u32 i = 0; i != tab_depth; i++)
		os << "\t";

	if (entry.is_group) {
		os << name << " = {\n";

		entry.group->writeLines(os, tab_depth + 1);

		for (u32 i = 0; i != tab_depth; i++)
			os << "\t";
		os << "}\n";
	} else {
		os << name << " = ";

		if (entry.value.find('\n') != std::string::npos)
			os << "\"\"\"\n" << entry.value << "\n\"\"\"\n";
		else
			os << entry.value << "\n";
	}
}


bool Settings::updateConfigObject(std::istream &is, std::ostream &os,
	const std::string &end, u32 tab_depth)
{
	SettingEntries::const_iterator it;
	std::set<std::string> present_entries;
	std::string line, name, value;
	bool was_modified = false;
	bool end_found = false;

	// Add any settings that exist in the config file with the current value
	// in the object if existing
	while (is.good() && !end_found) {
		std::getline(is, line);
		SettingsParseEvent event = parseConfigObject(line, end, name, value);

		switch (event) {
		case SPE_END:
			os << line << (is.eof() ? "" : "\n");
			end_found = true;
			break;
		case SPE_MULTILINE:
			value = getMultiline(is);
			/* FALLTHROUGH */
		case SPE_KVPAIR:
			it = m_settings.find(name);
			if (it != m_settings.end() &&
				(it->second.is_group || it->second.value != value)) {
				printEntry(os, name, it->second, tab_depth);
				was_modified = true;
			} else {
				os << line << "\n";
				if (event == SPE_MULTILINE)
					os << value << "\n\"\"\"\n";
			}
			present_entries.insert(name);
			break;
		case SPE_GROUP:
			it = m_settings.find(name);
			if (it != m_settings.end() && it->second.is_group) {
				os << line << "\n";
				sanity_check(it->second.group != NULL);
				was_modified |= it->second.group->updateConfigObject(is, os,
					"}", tab_depth + 1);
			} else {
				printEntry(os, name, it->second, tab_depth);
				was_modified = true;
			}
			present_entries.insert(name);
			break;
		default:
			os << line << (is.eof() ? "" : "\n");
			break;
		}
	}

	// Add any settings in the object that don't exist in the config file yet
	for (it = m_settings.begin(); it != m_settings.end(); ++it) {
		if (present_entries.find(it->first) != present_entries.end())
			continue;

		printEntry(os, it->first, it->second, tab_depth);
		was_modified = true;
	}

	return was_modified;
}


bool Settings::updateConfigFile(const char *filename)
{
	MutexAutoLock lock(m_mutex);

	std::ifstream is(filename);
	std::ostringstream os(std::ios_base::binary);

	bool was_modified = updateConfigObject(is, os, "");
	is.close();

	if (!was_modified)
		return true;

	if (!fs::safeWriteToFile(filename, os.str())) {
		errorstream << "Error writing configuration file: \""
			<< filename << "\"" << std::endl;
		return false;
	}

	return true;
}


bool Settings::parseCommandLine(int argc, char *argv[],
		std::map<std::string, ValueSpec> &allowed_options)
{
	int nonopt_index = 0;
	for (int i = 1; i < argc; i++) {
		std::string arg_name = argv[i];
		if (arg_name.substr(0, 2) != "--") {
			// If option doesn't start with -, read it in as nonoptX
			if (arg_name[0] != '-'){
				std::string name = "nonopt";
				name += itos(nonopt_index);
				set(name, arg_name);
				nonopt_index++;
				continue;
			}
			errorstream << "Invalid command-line parameter \""
					<< arg_name << "\": --<option> expected." << std::endl;
			return false;
		}

		std::string name = arg_name.substr(2);

		std::map<std::string, ValueSpec>::iterator n;
		n = allowed_options.find(name);
		if (n == allowed_options.end()) {
			errorstream << "Unknown command-line parameter \""
					<< arg_name << "\"" << std::endl;
			return false;
		}

		ValueType type = n->second.type;

		std::string value = "";

		if (type == VALUETYPE_FLAG) {
			value = "true";
		} else {
			if ((i + 1) >= argc) {
				errorstream << "Invalid command-line parameter \""
						<< name << "\": missing value" << std::endl;
				return false;
			}
			value = argv[++i];
		}

		set(name, value);
	}

	return true;
}



/***********
 * Getters *
 ***********/


const SettingsEntry &Settings::getEntry(const std::string &name) const
{
	MutexAutoLock lock(m_mutex);

	SettingEntries::const_iterator n;
	if ((n = m_settings.find(name)) == m_settings.end()) {
		if ((n = m_defaults.find(name)) == m_defaults.end())
			throw SettingNotFoundException("Setting [" + name + "] not found.");
	}
	return n->second;
}


Settings *Settings::getGroup(const std::string &name) const
{
	const SettingsEntry &entry = getEntry(name);
	if (!entry.is_group)
		throw SettingNotFoundException("Setting [" + name + "] is not a group.");
	return entry.group;
}


const std::string &Settings::get(const std::string &name) const
{
	const SettingsEntry &entry = getEntry(name);
	if (entry.is_group)
		throw SettingNotFoundException("Setting [" + name + "] is a group.");
	return entry.value;
}


bool Settings::getBool(const std::string &name) const
{
	return is_yes(get(name));
}


u16 Settings::getU16(const std::string &name) const
{
	return stoi(get(name), 0, 65535);
}


s16 Settings::getS16(const std::string &name) const
{
	return stoi(get(name), -32768, 32767);
}


s32 Settings::getS32(const std::string &name) const
{
	return stoi(get(name));
}


float Settings::getFloat(const std::string &name) const
{
	return stof(get(name));
}


u64 Settings::getU64(const std::string &name) const
{
	u64 value = 0;
	std::string s = get(name);
	std::istringstream ss(s);
	ss >> value;
	return value;
}


v2f Settings::getV2F(const std::string &name) const
{
	v2f value;
	Strfnd f(get(name));
	f.next("(");
	value.X = stof(f.next(","));
	value.Y = stof(f.next(")"));
	return value;
}


v3f Settings::getV3F(const std::string &name) const
{
	v3f value;
	Strfnd f(get(name));
	f.next("(");
	value.X = stof(f.next(","));
	value.Y = stof(f.next(","));
	value.Z = stof(f.next(")"));
	return value;
}


u32 Settings::getFlagStr(const std::string &name, const FlagDesc *flagdesc,
	u32 *flagmask) const
{
	std::string val = get(name);
	return std::isdigit(val[0])
		? stoi(val)
		: readFlagString(val, flagdesc, flagmask);
}


// N.B. if getStruct() is used to read a non-POD aggregate type,
// the behavior is undefined.
bool Settings::getStruct(const std::string &name, const std::string &format,
	void *out, size_t olen) const
{
	std::string valstr;

	try {
		valstr = get(name);
	} catch (SettingNotFoundException &e) {
		return false;
	}

	if (!deSerializeStringToStruct(valstr, format, out, olen))
		return false;

	return true;
}


bool Settings::getNoiseParams(const std::string &name, NoiseParams &np) const
{
	return getNoiseParamsFromGroup(name, np) || getNoiseParamsFromValue(name, np);
}


bool Settings::getNoiseParamsFromValue(const std::string &name,
	NoiseParams &np) const
{
	std::string value;

	if (!getNoEx(name, value))
		return false;

	Strfnd f(value);

	np.offset   = stof(f.next(","));
	np.scale    = stof(f.next(","));
	f.next("(");
	np.spread.X = stof(f.next(","));
	np.spread.Y = stof(f.next(","));
	np.spread.Z = stof(f.next(")"));
	f.next(",");
	np.seed     = stoi(f.next(","));
	np.octaves  = stoi(f.next(","));
	np.persist  = stof(f.next(","));

	std::string optional_params = f.next("");
	if (optional_params != "")
		np.lacunarity = stof(optional_params);

	return true;
}


bool Settings::getNoiseParamsFromGroup(const std::string &name,
	NoiseParams &np) const
{
	Settings *group = NULL;

	if (!getGroupNoEx(name, group))
		return false;

	group->getFloatNoEx("offset",      np.offset);
	group->getFloatNoEx("scale",       np.scale);
	group->getV3FNoEx("spread",        np.spread);
	group->getS32NoEx("seed",          np.seed);
	group->getU16NoEx("octaves",       np.octaves);
	group->getFloatNoEx("persistence", np.persist);
	group->getFloatNoEx("lacunarity",  np.lacunarity);

	np.flags = 0;
	if (!group->getFlagStrNoEx("flags", np.flags, flagdesc_noiseparams))
		np.flags = NOISE_FLAG_DEFAULTS;

	return true;
}


bool Settings::exists(const std::string &name) const
{
	MutexAutoLock lock(m_mutex);

	return (m_settings.find(name) != m_settings.end() ||
		m_defaults.find(name) != m_defaults.end());
}


std::vector<std::string> Settings::getNames() const
{
	std::vector<std::string> names;
	for (SettingEntries::const_iterator i = m_settings.begin();
		 	i != m_settings.end(); ++i) {
		names.push_back(i->first);
	}
	return names;
}



/***************************************