// Copyright (c) rAthena Dev Teams - Licensed under GNU GPL
// For more information, see LICENCE in the main folder

#include "guild.hpp"

#include <stdlib.h>

#include <common/cbasetypes.hpp>
#include <common/database.hpp>
#include <common/ers.hpp>
#include <common/malloc.hpp>
#include <common/mapindex.hpp>
#include <common/nullpo.hpp>
#include <common/showmsg.hpp>
#include <common/strlib.hpp>
#include <common/timer.hpp>
#include <common/utilities.hpp>
#include <common/utils.hpp>

#include "battle.hpp"
#include "channel.hpp"
#include "clif.hpp"
#include "instance.hpp"
#include "intif.hpp"
#include "log.hpp"
#include "map.hpp"
#include "mob.hpp"
#include "npc.hpp"
#include "pc.hpp"
#include "storage.hpp"
#include "trade.hpp"

using namespace rathena;

static DBMap* guild_db; // int guild_id -> struct guild*
CastleDatabase castle_db;

static DBMap* guild_expcache_db; // uint32 char_id -> struct guild_expcache*
static DBMap* guild_infoevent_db; // int guild_id -> struct eventlist*

struct eventlist {
	char name[EVENT_NAME_LENGTH];
	struct eventlist *next;
};

//Constant related to the flash of the Guild EXP cache
#define GUILD_SEND_XY_INTERVAL	5000 // Interval of sending coordinates and HP
#define GUILD_PAYEXP_INTERVAL 10000 //Interval (maximum survival time of the cache, in milliseconds)
#define GUILD_PAYEXP_LIST 8192 //The maximum number of cache

//Guild EXP cache
struct guild_expcache {
	int guild_id, account_id, char_id;
	t_exp exp;
};
static struct eri *expcache_ers; //For handling of guild exp payment.

struct s_guild_skill_requirement{
	uint16 id;
	uint16 lv;
};

struct s_guild_skill_tree{
	uint16 id;
	uint16 max;
	std::unordered_map<uint16,std::shared_ptr<s_guild_skill_requirement>> need;
};

class GuildSkillTreeDatabase : public TypesafeYamlDatabase<uint16, s_guild_skill_tree>{
public:
	GuildSkillTreeDatabase() : TypesafeYamlDatabase( "GUILD_SKILL_TREE_DB", 1 ){

	}

	const std::string getDefaultLocation() override;
	uint64 parseBodyNode( const ryml::NodeRef& node ) override;
};

const std::string GuildSkillTreeDatabase::getDefaultLocation(){
	return std::string(db_path) + "/guild_skill_tree.yml";
}

uint64 GuildSkillTreeDatabase::parseBodyNode( const ryml::NodeRef& node ){
	std::string name;

	if( !this->asString( node, "Id", name ) ){
		return 0;
	}

	uint16 skill_id;

	if( !( skill_id = skill_name2id( name.c_str() ) ) ){
		this->invalidWarning( node["Id"], "Invalid guild skill name \"%s\", skipping.\n", name.c_str() );
		return 0;
	}

	if( !SKILL_CHK_GUILD( skill_id ) ){
		this->invalidWarning( node["Id"], "Guild skill \"%s\" with Id %u is out of the guild skill range [%u-%u], skipping.\n", name.c_str(), skill_id, GD_SKILLBASE, GD_MAX );
		return 0;
	}

	std::shared_ptr<s_guild_skill_tree> skill = this->find( skill_id );
	bool exists = skill != nullptr;

	if( !exists ){
		if( !this->nodeExists( node, "MaxLevel" ) ){
			this->invalidWarning( node, "Missing node \"MaxLevel\", skipping.\n" );
			return 0;
		}

		skill = std::make_shared<s_guild_skill_tree>();
		skill->id = skill_id;
	}

	if( this->nodeExists( node, "MaxLevel" ) ){
		uint16 level;

		if( !this->asUInt16( node, "MaxLevel", level ) ){
			return 0;
		}

		// Enable Guild's Glory when required for emblems
		if( skill_id == GD_GLORYGUILD && battle_config.require_glory_guild && level == 0 ){
			level = 1;
		}

		skill->max = level;
	}

	if( this->nodeExists( node, "Required" ) ){
		const auto& reqNode = node["Required"];
		for( const auto&  requiredNode : reqNode ){
			std::string requiredName;

			if( !this->asString( requiredNode, "Id", requiredName ) ){
				return 0;
			}

			uint16 requiredSkillId;

			if( !( requiredSkillId = skill_name2id( requiredName.c_str() ) ) ){
				this->invalidWarning( requiredNode["Id"], "Invalid required guild skill name \"%s\", skipping.\n", requiredName.c_str() );
				return 0;
			}

			if( !SKILL_CHK_GUILD( requiredSkillId ) ){
				this->invalidWarning( requiredNode["Id"], "Required guild skill \"%s\" with Id %u is out of the guild skill range [%u-%u], skipping.\n", requiredName.c_str(), requiredSkillId, GD_SKILLBASE, GD_MAX );
				return 0;
			}

			std::shared_ptr<s_guild_skill_requirement> requirement = util::umap_find( skill->need, requiredSkillId );
			bool requirement_exists = requirement != nullptr;

			if( !requirement_exists ){
				if( !this->nodeExists( requiredNode, "Level" ) ){
					this->invalidWarning( requiredNode, "Missing node \"Level\", skipping.\n" );
					return 0;
				}

				requirement = std::make_shared<s_guild_skill_requirement>();
				requirement->id = requiredSkillId;
			}

			if( this->nodeExists( requiredNode, "Level" ) ){
				uint16 requiredLevel;

				if( !this->asUInt16( requiredNode, "Level", requiredLevel ) ){
					return 0;
				}

				if( requiredLevel == 0 ){
					continue;
				}

				requirement->lv = requiredLevel;
			}

			if( !requirement_exists ){
				skill->need[requiredSkillId] = requirement;
			}
		}
	}

	if( !exists ){
		this->put( skill_id, skill );
	}

	return 1;
}

GuildSkillTreeDatabase guild_skill_tree_db;

TIMER_FUNC(guild_payexp_timer);
static TIMER_FUNC(guild_send_xy_timer);

/* guild flags cache */
struct npc_data **guild_flags;
unsigned short guild_flags_count;

/**
 * Get guild skill index in guild structure of mmo.hpp
 * @param skill_id
 * @return Index in skill_tree or -1
 **/
static short guild_skill_get_index(uint16 skill_id) {
	if (!SKILL_CHK_GUILD(skill_id))
		return -1;
	skill_id -= GD_SKILLBASE;
	if (skill_id >= MAX_GUILDSKILL)
		return -1;
	return skill_id;
}

/*==========================================
 * Retrieves and validates the sd pointer for this guild member [Skotlex]
 *------------------------------------------*/
static TBL_PC* guild_sd_check(int guild_id, uint32 account_id, uint32 char_id) {
	TBL_PC* sd = map_id2sd(account_id);

	if (!(sd && sd->status.char_id == char_id))
		return NULL;

	if (sd->status.guild_id != guild_id)
	{	//If player belongs to a different guild, kick him out.
		intif_guild_leave(guild_id,account_id,char_id,0,"** Guild Mismatch **");
		return NULL;
	}

	return sd;
}

// Modified [Komurka]
uint16 guild_skill_get_max( uint16 id ){
	std::shared_ptr<s_guild_skill_tree> skill = guild_skill_tree_db.find( id );

	if( skill == nullptr ){
		return 0;
	}

	return skill->max;
}

// Retrieve skill_lv learned by guild
int guild_checkskill(struct guild *g, int id) {
	if ( g == nullptr || (id = guild_skill_get_index(id)) < 0)
		return 0;
	return g->skill[id].lv;
}

/*==========================================
 * Guild skill check - from jA [Komurka]
 *------------------------------------------*/
bool guild_check_skill_require( struct guild *g, uint16 id ){
	if( g == nullptr ){
		return false;
	}

	std::shared_ptr<s_guild_skill_tree> skill = guild_skill_tree_db.find( id );

	if( skill == nullptr ){
		return false;
	}

	for( const auto& pair : skill->need ){
		if( pair.second->lv > guild_checkskill( g, pair.second->id ) ){
			return false;
		}
	}

	return true;
}

const std::string CastleDatabase::getDefaultLocation() {
	return std::string(db_path) + "/castle_db.yml";
}

uint64 CastleDatabase::parseBodyNode(const ryml::NodeRef& node) {
	int32 castle_id;

	if (!this->asInt32(node, "Id", castle_id))
		return 0;

	std::shared_ptr<guild_castle> gc = this->find(castle_id);
	bool exists = gc != nullptr;

	if (!exists) {
		if (!this->nodesExist(node, { "Map", "Name", "Npc" }))
			return 0;

		gc = std::make_shared<guild_castle>();
		gc->castle_id = castle_id;
	}

	if (this->nodeExists(node, "Map")) {
		std::string map_name;

		if (!this->asString(node, "Map", map_name))
			return 0;

		uint16 mapindex = mapindex_name2idx(map_name.c_str(), nullptr);

		if( mapindex == 0 ){
			this->invalidWarning(node["Map"], "Map %s doesn't exist, skipping.\n", map_name.c_str());
			return 0;
		}

		gc->mapindex = mapindex;
	}

	if (this->nodeExists(node, "Name")) {
		std::string castle_name;

		if (!this->asString(node, "Name", castle_name))
			return 0;

		safestrncpy(gc->castle_name, castle_name.c_str(), sizeof(gc->castle_name));
	}

	if (this->nodeExists(node, "Npc")) {
		std::string npc_name;

		if (!this->asString(node, "Npc", npc_name))
			return 0;

		if (npc_name.size() > NPC_NAME_LENGTH) {
			this->invalidWarning(node["NPC"], "Npc name %s too long, skipping.\n", npc_name.c_str());
			return 0;
		}

		safestrncpy(gc->castle_event, npc_name.c_str(), sizeof(gc->castle_event));
	}

	if( this->nodeExists( node, "Type" ) ){
		std::string type;

		if( !this->asString( node, "Type", type ) ){
			return 0;
		}

		std::string type_constant = "WOE_" + type;
		int64 constant;

		if( !script_get_constant( type_constant.c_str(), &constant ) || constant < WOE_FIRST_EDITION || constant >= WOE_MAX ){
			this->invalidWarning( node["Type"], "Invalid WoE type %s.\n", type.c_str() );
			return 0;
		}

		gc->type = static_cast<e_woe_type>( constant );
	}else{
		if( !exists ){
			gc->type = WOE_FIRST_EDITION;
		}
	}

	if( this->nodeExists( node, "ClientId" ) ){
		uint16 id;

		if( !this->asUInt16( node, "ClientId", id ) ){
			return 0;
		}

		gc->client_id = id;
	}else{
		if( !exists ){
			gc->client_id = 0;
		}
	}

	if( this->nodeExists( node, "WarpEnabled" ) ){
		bool enabled;

		if( !this->asBool( node, "WarpEnabled", enabled ) ){
			return 0;
		}

		gc->warp_enabled = enabled;
	}else{
		if( !exists ){
			gc->warp_enabled = false;
		}
	}

	if (this->nodeExists(node, "WarpX")) {
		uint16 warp_x;

		if (!this->asUInt16(node, "WarpX", warp_x)) {
			return 0;
		}

		if( warp_x == 0 ){
			this->invalidWarning( node["WarpX"], "WarpX has to be greater than zero.\n" );
			return 0;
		}

		map_data* md = map_getmapdata( map_mapindex2mapid( gc->mapindex ) );

		// If the map is on another map-server, we cannot verify the bounds
		if( md != nullptr && warp_x >= md->xs ){
			this->invalidWarning( node["WarpX"], "WarpX has to be smaller than %hu.\n", md->xs );
			return 0;
		}

		gc->warp_x = warp_x;
	}
	else {
		if (!exists)
			gc->warp_x = 0;
	}

	if (this->nodeExists(node, "WarpY")) {
		uint16 warp_y;

		if (!this->asUInt16(node, "WarpY", warp_y)) {
			return 0;
		}

		if( warp_y == 0 ){
			this->invalidWarning( node["WarpY"], "WarpY has to be greater than zero.\n" );
			return 0;
		}

		map_data* md = map_getmapdata( map_mapindex2mapid( gc->mapindex ) );

		// If the map is on another map-server, we cannot verify the bounds
		if( md != nullptr && warp_y >= md->ys ){
			this->invalidWarning( node["WarpY"], "WarpY has to be smaller than %hu.\n", md->ys );
			return 0;
		}

		gc->warp_y = warp_y;
	}
	else {
		if (!exists)
			gc->warp_y = 0;
	}

	if (this->nodeExists(node, "WarpCost")) {
		uint32 zeny;

		if (!this->asUInt32(node, "WarpCost", zeny)) {
			return 0;
		}

		if( zeny > MAX_ZENY ){
			this->invalidWarning( node["WarpCost"], "WarpCost has to be smaller than %d.\n", MAX_ZENY );
			return 0;
		}

		gc->zeny = zeny;
	} else {
		if (!exists)
			gc->zeny = 100;
	}

	if (this->nodeExists(node, "WarpCostSiege")) {
		uint32 zeny_siege;

		if (!this->asUInt32(node, "WarpCostSiege", zeny_siege)) {
			return 0;
		}

		if( zeny_siege > MAX_ZENY ){
			this->invalidWarning( node["WarpCostSiege"], "WarpCostSiege has to be smaller than %d.\n", MAX_ZENY );
			return 0;
		}

		gc->zeny_siege = zeny_siege;
	}
	else {
		if (!exists)
			gc->zeny_siege = 100000;
	}

	if (!exists)
		this->put(castle_id, gc);

	return 1;
}

void CastleDatabase::loadingFinished(){
	for( const auto& pair : *this ){
		std::shared_ptr<guild_castle> castle = pair.second;

		if( castle->client_id != 0 ){
			// Check if ClientId is unique
			for( const auto& pair2 : *this ){
				std::shared_ptr<guild_castle> castle2 = pair2.second;

				if( castle->castle_id == castle2->castle_id ){
					continue;
				}

				if( castle->client_id == castle2->client_id ){
					ShowWarning( "Castle ClientId %hu is ambigous.\n", castle->client_id );
					break;
				}
			}
		}

		if( castle->warp_enabled ){
			if( castle->client_id == 0 ){
				ShowWarning( "Warping to castle %d is enabled, but no ClientId is set. Disabling...\n", castle->castle_id );
				castle->warp_enabled = false;
				continue;
			}

			if( castle->warp_x == 0 ){
				ShowWarning( "Warping to castle %d is enabled, but no WarpX is set. Disabling...\n", castle->castle_id );
				castle->warp_enabled = false;
				continue;
			}

			if( castle->warp_y == 0 ){
				ShowWarning( "Warping to castle %d is enabled, but no WarpY is set. Disabling...\n", castle->castle_id );
				castle->warp_enabled = false;
				continue;
			}
		}
	}
}

/// lookup: guild id -> guild*
struct guild* guild_search(int guild_id) {
	return (struct guild*)idb_get(guild_db,guild_id);
}

/// lookup: guild name -> guild*
struct guild* guild_searchname(char* str) {
	struct guild* g;
	DBIterator *iter = db_iterator(guild_db);

	for( g = (struct guild*)dbi_first(iter); dbi_exists(iter); g = (struct guild*)dbi_next(iter) ) {
		if( strcmpi(g->name, str) == 0 )
			break;
	}
	dbi_destroy(iter);

	return g;
}

/// lookup: map index -> castle*
std::shared_ptr<guild_castle> CastleDatabase::mapindex2gc(int16 mapindex) {
	for (const auto &it : *this) {
		if (it.second->mapindex == mapindex)
			return it.second;
	}
	return nullptr;
}

/// lookup: map name -> castle*
std::shared_ptr<guild_castle> CastleDatabase::mapname2gc(const char* mapname) {
	return castle_db.mapindex2gc(mapindex_name2id(mapname));
}

std::shared_ptr<guild_castle> CastleDatabase::find_by_clientid( uint16 client_id ){
	for( const auto &it : *this ){
		if( it.second->client_id == client_id ){
			return it.second;
		}
	}

	return nullptr;
}

map_session_data* guild_getavailablesd(struct guild* g) {
	int i;

	nullpo_retr(NULL, g);

	ARR_FIND( 0, g->max_member, i, g->member[i].sd != NULL );
	return( i < g->max_member ) ? g->member[i].sd : NULL;
}

/// lookup: player AID/CID -> member index
int guild_getindex(struct guild *g,uint32 account_id,uint32 char_id) {
	int i;

	if( g == NULL )
		return -1;

	ARR_FIND( 0, g->max_member, i, g->member[i].account_id == account_id && g->member[i].char_id == char_id );
	return( i < g->max_member ) ? i : -1;
}

/// lookup: player sd -> member position
int guild_getposition(map_session_data* sd) {
	int i;
	struct guild *g;

	nullpo_retr( -1, g = sd->guild );

	ARR_FIND( 0, g->max_member, i, g->member[i].account_id == sd->status.account_id && g->member[i].char_id == sd->status.char_id );
	return( i < g->max_member ) ? g->member[i].position : -1;
}

//Creation of member information
void guild_makemember(struct guild_member *m,map_session_data *sd) {
	nullpo_retv(sd);

	memset(m,0,sizeof(struct guild_member));
	m->account_id	= sd->status.account_id;
	m->char_id		= sd->status.char_id;
	m->hair			= sd->status.hair;
	m->hair_color	= sd->status.hair_color;
	m->gender		= sd->status.sex;
	m->class_		= sd->status.class_;
	m->lv			= sd->status.base_level;
	m->exp			= 0;
	m->online		= 1;
	m->position		= MAX_GUILDPOSITION-1;
	safestrncpy(m->name,sd->status.name,NAME_LENGTH);
	m->last_login	= (uint32)time(NULL);
}

/**
 * Server cache to be flushed to inter the Guild EXP
 * @see DBApply
 */
int guild_payexp_timer_sub(DBKey key, DBData *data, va_list ap) {
	int i;
	struct guild_expcache *c;
	struct guild *g;

	c = (struct guild_expcache *)db_data2ptr(data);

	if (
		(g = guild_search(c->guild_id)) == NULL ||
		(i = guild_getindex(g, c->account_id, c->char_id)) < 0
	) {
		ers_free(expcache_ers, c);
		return 0;
	}

	g->member[i].exp = util::safe_addition_cap(g->member[i].exp, c->exp, MAX_GUILD_EXP);

	intif_guild_change_memberinfo(g->guild_id,c->account_id,c->char_id,
		GMI_EXP,&g->member[i].exp,sizeof(g->member[i].exp));
	c->exp=0;

	ers_free(expcache_ers, c);
	return 0;
}

TIMER_FUNC(guild_payexp_timer){
	guild_expcache_db->clear(guild_expcache_db,guild_payexp_timer_sub);
	return 0;
}

/**
 * Taken from party_send_xy_timer_sub. [Skotlex]
 * @see DBApply
 */
int guild_send_xy_timer_sub(DBKey key, DBData *data, va_list ap) {
	struct guild *g = (struct guild *)db_data2ptr(data);
	int i;

	nullpo_ret(g);

	if( !g->connect_member ) {
		// no members connected to this guild so do not iterate
		return 0;
	}

	for(i=0;i<g->max_member;i++){
		map_session_data* sd = g->member[i].sd;
		if( sd != NULL && sd->fd && (sd->guild_x != sd->bl.x || sd->guild_y != sd->bl.y) && !sd->bg_id ) {
			clif_guild_xy(sd);
			sd->guild_x = sd->bl.x;
			sd->guild_y = sd->bl.y;
		}
	}
	return 0;
}

//Code from party_send_xy_timer [Skotlex]
static TIMER_FUNC(guild_send_xy_timer){
	guild_db->foreach(guild_db,guild_send_xy_timer_sub,tick);
	return 0;
}

int guild_send_dot_remove(map_session_data *sd) {
	if (sd->status.guild_id)
		clif_guild_xy_remove(sd);
	return 0;
}
//------------------------------------------------------------------------

int guild_create(map_session_data *sd, const char *name) {
	char tname[NAME_LENGTH];
	struct guild_member m;
	nullpo_ret(sd);

	safestrncpy(tname, name, NAME_LENGTH);
	trim(tname);

	if( !tname[0] )
		return 0; // empty name

	if( sd->status.guild_id ) {
		// already in a guild
		clif_guild_created(sd,1);
		return 0;
	}
	if( battle_config.guild_emperium_check && pc_search_inventory(sd,ITEMID_EMPERIUM) == -1 ) {
		// item required
		clif_guild_created(sd,3);
		return 0;
	}

	guild_makemember(&m,sd);
	m.position=0;
	intif_guild_create(name,&m);
	return 1;
}

//Whether or not to create guild
int guild_created(uint32 account_id,int guild_id) {
	map_session_data *sd=map_id2sd(account_id);

	if(sd==NULL)
		return 0;
	if(!guild_id) {
		clif_guild_created(sd, 2); // Creation failure (presence of the same name Guild)
		return 0;
	}

	sd->status.guild_id = guild_id;
	clif_guild_created(sd,0);
	if(battle_config.guild_emperium_check){
		int index = pc_search_inventory(sd,ITEMID_EMPERIUM);

		if( index > 0 )
			pc_delitem(sd,index,1,0,0,LOG_TYPE_CONSUME);	//emperium consumption
	}
	return 0;
}

//Information request
int guild_request_info(int guild_id) {
	return intif_guild_request_info(guild_id);
}

//Information request with event
int guild_npc_request_info(int guild_id,const char *event) {
	if( guild_search(guild_id) ) {
		if( event && *event )
			npc_event_doall(event);

		return 0;
	}

	if( event && *event ) {
		struct eventlist *ev;
		DBData prev;
		ev=(struct eventlist *)aCalloc(sizeof(struct eventlist),1);
		safestrncpy(ev->name,event,EVENT_NAME_LENGTH);
		//The one in the db (if present) becomes the next event from this.
		if (guild_infoevent_db->put(guild_infoevent_db, db_i2key(guild_id), db_ptr2data(ev), &prev))
			ev->next = (struct eventlist *)db_data2ptr(&prev);
	}

	return guild_request_info(guild_id);
}

/**
 * Close trade window if party member is kicked when trade a party bound item
 * @param sd
 **/
static void guild_trade_bound_cancel(map_session_data *sd) {
#ifdef BOUND_ITEMS
	nullpo_retv(sd);
	if (sd->state.isBoundTrading&(1<<BOUND_GUILD))
		trade_tradecancel(sd);
#else
	;
#endif
}

//Confirmation of the character belongs to guild
int guild_check_member(struct guild *g) {
	int i;
	map_session_data *sd;
	struct s_mapiterator* iter;

	nullpo_ret(g);

	iter = mapit_getallusers();
	for( sd = (TBL_PC*)mapit_first(iter); mapit_exists(iter); sd = (TBL_PC*)mapit_next(iter) ) {
		if( sd->status.guild_id != g->guild_id )
			continue;

		i = guild_getindex(g,sd->status.account_id,sd->status.char_id);
		if (i < 0) {
			sd->guild = NULL;
			sd->status.guild_id=0;
			sd->guild_emblem_id=0;
			ShowWarning("guild: check_member %d[%s] is not member\n",sd->status.account_id,sd->status.name);
		}
	}
	mapit_free(iter);

	return 0;
}

//Delete association with guild_id for all characters
int guild_recv_noinfo(int guild_id) {
	map_session_data *sd;
	struct s_mapiterator* iter;

	iter = mapit_getallusers();
	for( sd = (TBL_PC*)mapit_first(iter); mapit_exists(iter); sd = (TBL_PC*)mapit_next(iter) ) {
		if( sd->status.guild_id == guild_id )
			sd->status.guild_id = 0; // erase guild
	}
	mapit_free(iter);

	return 0;
}

//Get and display information for all member
int guild_recv_info(struct guild *sg) {
	struct guild *g,before;
	int i,bm,m;
	DBData data;
	map_session_data *sd;
	bool guild_new = false;

	nullpo_ret(sg);

	if((g = guild_search(sg->guild_id))==NULL) {
		guild_new = true;
		g=(struct guild *)aCalloc(1,sizeof(struct guild));
		idb_put(guild_db,sg->guild_id,g);
		before=*sg;
		//Perform the check on the user because the first load
		guild_check_member(sg);
		if ((sd = map_nick2sd(sg->master,false)) != NULL) {
#ifndef RENEWAL
			//If the guild master is online the first time the guild_info is received,
			//that means he was the first to join, so apply guild skill blocking here.
			if( battle_config.guild_skill_relog_delay )
				guild_block_skill(sd, battle_config.guild_skill_relog_delay);
#endif

			//Also set the guild master flag.
			sd->guild = g;
			sd->state.gmaster_flag = 1;
			clif_name_area(&sd->bl); // [LuzZza]
			clif_guild_masterormember(sd);
		}
	} else {
		before=*g;
	}
	memcpy(g,sg,sizeof(struct guild));

	if(g->max_member > MAX_GUILD) {
		ShowError("guild_recv_info: Received guild with %d members, but MAX_GUILD is only %d. Extra guild-members have been lost!\n", g->max_member, MAX_GUILD);
		g->max_member = MAX_GUILD;
	}

	for(i=bm=m=0;i<g->max_member;i++){
		if(g->member[i].account_id>0){
			sd = g->member[i].sd = guild_sd_check(g->guild_id, g->member[i].account_id, g->member[i].char_id);
			if (sd) clif_name_area(&sd->bl); // [LuzZza]
			m++;
		}else
			g->member[i].sd=NULL;
		if(before.member[i].account_id>0)
			bm++;
	}

	// Restore the instance id
	if( !guild_new && before.instance_id ){
		g->instance_id = before.instance_id;
	}

	for (i = 0; i < g->max_member; i++) { //Transmission of information at all members
		sd = g->member[i].sd;
		if( sd==NULL )
			continue;
		sd->guild = g;
		if(channel_config.ally_tmpl.name[0] && (channel_config.ally_tmpl.opt&CHAN_OPT_AUTOJOIN)) {
			channel_gjoin(sd,3); //make all member join guildchan+allieschan
		}

		if (before.guild_lv != g->guild_lv || bm != m ||
			before.max_member != g->max_member) {
			clif_guild_basicinfo( *sd ); //Submit basic information
			clif_guild_emblem(sd, g); //Submit emblem
		}

		if (bm != m) { //Send members information
			clif_guild_memberlist( *sd );
		}

		if (before.skill_point != g->skill_point)
			clif_guild_skillinfo(sd); //Submit information skills

		if (guild_new) { // Send information and affiliation if unsent
			clif_guild_belonginfo( *sd );
			clif_guild_notice(sd);
			sd->guild_emblem_id = g->emblem_id;
		}
		if (g->instance_id > 0)
			instance_reqinfo(sd, g->instance_id);
	}

	//Occurrence of an event
	if (guild_infoevent_db->remove(guild_infoevent_db, db_i2key(sg->guild_id), &data)) {
		struct eventlist *ev = (struct eventlist *)db_data2ptr(&data), *ev2;
		while(ev) {
			npc_event_do(ev->name);
			ev2=ev->next;
			aFree(ev);
			ev=ev2;
		}
	}

	return 0;
}

/*=============================================
 * Player sd send a guild invatation to player tsd to join his guild
 *--------------------------------------------*/
int guild_invite(map_session_data *sd, map_session_data *tsd) {
	struct guild *g;
	int i;

	nullpo_ret(sd);

	g=sd->guild;

	if(tsd==NULL || g==NULL)
		return 0;

	if( (i=guild_getposition(sd))<0 || !(g->position[i].mode&GUILD_PERM_INVITE) )
		return 0; //Invite permission.

	if(!battle_config.invite_request_check) {
	if (tsd->party_invite > 0 || tsd->trade_partner || tsd->adopt_invite) { //checking if there no other invitation pending
			clif_guild_inviteack(sd,0);
			return 0;
		}
	}

	if (!tsd->fd) { //You can't invite someone who has already disconnected.
		clif_guild_inviteack(sd,1);
		return 0;
	}

	if(tsd->status.guild_id>0 ||
		tsd->guild_invite>0 ||
		map_flag_gvg2(tsd->bl.m))
	{	//Can't invite people inside castles. [Skotlex]
		clif_guild_inviteack(sd,0);
		return 0;
	}

	//search an empty spot in guild
	ARR_FIND( 0, g->max_member, i, g->member[i].account_id == 0 );
	if(i==g->max_member){
		clif_guild_inviteack(sd,3);
		return 0;
	}

	tsd->guild_invite=sd->status.guild_id;
	tsd->guild_invite_account=sd->status.account_id;

	clif_guild_invite(tsd,g);
	return 0;
}

/// Guild invitation reply.
/// flag: 0:rejected, 1:accepted
int guild_reply_invite(map_session_data* sd, int guild_id, int flag) {
	map_session_data* tsd;

	nullpo_ret(sd);

	// subsequent requests may override the value
	if( sd->guild_invite != guild_id )
		return 0; // mismatch

	// look up the person who sent the invite
	//NOTE: this can be NULL because the person might have logged off in the meantime
	tsd = map_id2sd(sd->guild_invite_account);

	if ( sd->status.guild_id > 0 ) {
	// [Paradox924X]
	 // Already in another guild.
		if ( tsd ) clif_guild_inviteack(tsd,0);
		return 0;
	} else if( flag == 0 ) {// rejected
		sd->guild_invite = 0;
		sd->guild_invite_account = 0;
		if( tsd ) clif_guild_inviteack(tsd,1);
	} else {// accepted
		struct guild_member m;
		struct guild* g;
		int i;

		if( (g=guild_search(guild_id)) == NULL ) {
			sd->guild_invite = 0;
			sd->guild_invite_account = 0;
			return 0;
		}

		ARR_FIND( 0, g->max_member, i, g->member[i].account_id == 0 );
		if( i == g->max_member ) {
			sd->guild_invite = 0;
			sd->guild_invite_account = 0;
			if( tsd ) clif_guild_inviteack(tsd,3);
			return 0;
		}

		guild_makemember(&m,sd);
		intif_guild_addmember(guild_id, &m);
		//TODO: send a minimap update to this player
	}

	return 0;
}

//Invoked when a player joins.
//- If guild is not in memory, it is requested
//- Otherwise sd pointer is set up.
//- Player must be authed and must belong to a guild before invoking this method
void guild_member_joined(map_session_data *sd) {
	struct guild* g;
	int i;
	g=guild_search(sd->status.guild_id);
	if (!g) {
		guild_request_info(sd->status.guild_id);
		return;
	}
	if (strcmp(sd->status.name,g->master) == 0) {	// set the Guild Master flag
		sd->state.gmaster_flag = 1;
#ifndef RENEWAL
		// prevent Guild Skills from being used directly after relog
		if( sd->state.connect_new == 1 && battle_config.guild_skill_relog_delay )
			guild_block_skill(sd, battle_config.guild_skill_relog_delay);
#endif
	}
	i = guild_getindex(g, sd->status.account_id, sd->status.char_id);
	if (i == -1)
		sd->status.guild_id = 0;
	else {
		g->member[i].sd = sd;
		sd->guild = g;

		if( channel_config.ally_tmpl.name[0] && (channel_config.ally_tmpl.opt&CHAN_OPT_AUTOJOIN) ) {
			channel_gjoin(sd,3);
		}
	}
}

/*==========================================
 * Add a player to a given guild_id
 *----------------------------------------*/
int guild_member_added(int guild_id,uint32 account_id,uint32 char_id,int flag) {
	map_session_data *sd= map_id2sd(account_id),*sd2;
	struct guild *g;

	if( (g=guild_search(guild_id))==NULL )
		return 0;

	if(sd==NULL || sd->guild_invite==0){
	// cancel if player not present or invalide guild_id invitation
		if (flag == 0) {
			ShowError("guild: member added error %d is not online\n",account_id);
 			intif_guild_leave(guild_id,account_id,char_id,0,"** Data Error **");
		}
		return 0;
	}
	sd2 = map_id2sd(sd->guild_invite_account);
	sd->guild_invite = 0;
	sd->guild_invite_account = 0;

	if (flag == 1) { //failure
		if( sd2!=NULL )
			clif_guild_inviteack(sd2,3);
		return 0;
	}

	//if all ok add player to guild
	sd->status.guild_id = g->guild_id;
	sd->guild_emblem_id = g->emblem_id;
	sd->guild = g;
	//Packets which were sent in the previous 'guild_sent' implementation.
	clif_guild_belonginfo( *sd );
	clif_guild_notice(sd);

	//TODO: send new emblem info to others

	if( sd2!=NULL )
		clif_guild_inviteack(sd2,2);

	//Next line commented because it do nothing, look at guild_recv_info [LuzZza]
	//clif_charnameupdate(sd); //Update display name [Skotlex]

	if (g->instance_id > 0)
		instance_reqinfo(sd, g->instance_id);

	return 0;
}

/*==========================================
 * Player request leaving a given guild_id
 *----------------------------------------*/
int guild_leave(map_session_data* sd, int guild_id, uint32 account_id, uint32 char_id, const char* mes) {
	struct guild *g;

	nullpo_ret(sd);

	g = sd->guild;

	if(g==NULL)
		return 0;

	if(sd->status.account_id!=account_id ||
		sd->status.char_id!=char_id || sd->status.guild_id!=guild_id ||
		map_flag_gvg2(sd->bl.m))
		return 0;

	guild_trade_bound_cancel(sd);
	intif_guild_leave(sd->status.guild_id, sd->status.account_id, sd->status.char_id,0,mes);
	return 0;
}

/*==========================================
 * Request remove a player to a given guild_id
 *----------------------------------------*/
int guild_expulsion(map_session_data* sd, int guild_id, uint32 account_id, uint32 char_id, const char* mes) {
	map_session_data *tsd;
	struct guild *g;
	int i,ps;

	nullpo_ret(sd);

	g = sd->guild;

	if(g==NULL)
		return 0;

	if(sd->status.guild_id!=guild_id)
		return 0;

	if( (ps=guild_getposition(sd))<0 || !(g->position[ps].mode&GUILD_PERM_EXPEL) )
		return 0;	//Expulsion permission

	//Can't leave inside guild castles.
	if ((tsd = map_id2sd(account_id)) &&
		tsd->status.char_id == char_id &&
		map_flag_gvg2(tsd->bl.m))
		return 0;

	// find the member and perform expulsion
	i = guild_getindex(g, account_id, char_id);
	if( i != -1 && strcmp(g->member[i].name,g->master) != 0 ) { //Can't expel the GL!
		if (tsd)
			guild_trade_bound_cancel(tsd);
		intif_guild_leave(g->guild_id,account_id,char_id,1,mes);
	}

	return 0;
}

/**
* A confirmation from inter-serv that player is kicked successfully
* @param guild_Id
* @param account_id
* @param char_id
* @param flag
* @param name
* @param mes
*/
int guild_member_withdraw(int guild_id, uint32 account_id, uint32 char_id, int flag, const char* name, const char* mes) {
	int i;
	struct guild* g = guild_search(guild_id);
	map_session_data* sd = map_charid2sd(char_id);
	map_session_data* online_member_sd;

	if(g == NULL)
		return 0; // no such guild (error!)

	i = guild_getindex(g, account_id, char_id);
	if( i == -1 )
		return 0; // not a member (inconsistency!)

#ifdef BOUND_ITEMS
	//Guild bound item check
	guild_retrieveitembound(char_id,account_id,guild_id);
#endif

	online_member_sd = guild_getavailablesd(g);
	if(online_member_sd == NULL)
		return 0; // noone online to inform


	if(!flag)
		clif_guild_leave(online_member_sd, name, mes);
	else
		clif_guild_expulsion(online_member_sd, name, mes, account_id);

	// remove member from guild
	memset(&g->member[i],0,sizeof(struct guild_member));
	clif_guild_memberlist( *online_member_sd );

	// update char, if online
	if(sd != NULL && sd->status.guild_id == guild_id) {
		// do stuff that needs the guild_id first, BEFORE we wipe it
		if (sd->state.storage_flag == 2) //Close the guild storage.
			storage_guild_storageclose(sd);
		guild_send_dot_remove(sd);
		channel_pcquit(sd,3); //leave guild and ally chan
		sd->status.guild_id = 0;
		sd->guild = NULL;
		sd->guild_emblem_id = 0;

		if (g->instance_id) {
			struct map_data *mapdata = map_getmapdata(sd->bl.m);

			// User was on the instance map of the guild
			if( g->instance_id == mapdata->instance_id ){
				pc_setpos_savepoint( *sd );
			}
		}

		clif_name_area(&sd->bl); //Update display name [Skotlex]
		status_change_end(&sd->bl,SC_LEADERSHIP);
		status_change_end(&sd->bl,SC_GLORYWOUNDS);
		status_change_end(&sd->bl,SC_SOULCOLD);
		status_change_end(&sd->bl,SC_HAWKEYES);
		status_change_end(&sd->bl,SC_EMERGENCY_MOVE);
		//@TODO: Send emblem update to self and people around
	}
	return 0;
}

#ifdef BOUND_ITEMS
/**
* Retrieve guild bound items from kicked member
* @param char_id
* @param account_id
* @param guild_id
*/
void guild_retrieveitembound(uint32 char_id, uint32 account_id, int guild_id) {
	TBL_PC *sd = map_charid2sd(char_id);
	if (sd) { //Character is online
		int idxlist[MAX_INVENTORY];
		int j;
		j = pc_bound_chk(sd,BOUND_GUILD,idxlist);
		if (j) {
			struct s_storage* stor = guild2storage(sd->status.guild_id);
			struct guild *g = guild_search(guild_id);
			int i;
			if (stor && stor->status) { //Someone is in guild storage, close them
				for (i = 0; i < g->max_member; i++) {
					TBL_PC *pl_sd = g->member[i].sd;
					if (pl_sd && pl_sd->state.storage_flag == 2)
						storage_guild_storageclose(pl_sd);
				}
			}
			for (i = 0; i < j; i++) { //Loop the matching items, gstorage_additem takes care of opening storage
				if (stor)
					storage_guild_additem(sd,stor,&sd->inventory.u.items_inventory[idxlist[i]],sd->inventory.u.items_inventory[idxlist[i]].amount);
				pc_delitem(sd,idxlist[i],sd->inventory.u.items_inventory[idxlist[i]].amount,0,4,LOG_TYPE_GSTORAGE);
			}
			storage_guild_storageclose(sd); //Close and save the storage
		}
	} else { //Character is offline, ask char server to do the job
		struct s_storage* stor = guild2storage2(guild_id);
		struct guild *g = guild_search(guild_id);
		nullpo_retv(g);
		if (stor && stor->status) { //Someone is in guild storage, close them
			int i;
			for (i = 0; i < g->max_member; i++) {
				TBL_PC *pl_sd = g->member[i].sd;
				if (pl_sd && pl_sd->state.storage_flag == 2)
					storage_guild_storageclose(pl_sd);
			}
		}
		intif_itembound_guild_retrieve(char_id,account_id,guild_id);
	}
}
#endif

int guild_send_memberinfoshort(map_session_data *sd,int online) { // cleaned up [LuzZza]
	struct guild *g;

	nullpo_ret(sd);

	if(sd->status.guild_id <= 0)
		return 0;

	if(!(g = sd->guild))
		return 0;

	intif_guild_memberinfoshort(g->guild_id,
		sd->status.account_id,sd->status.char_id,online,sd->status.base_level,sd->status.class_);

	if(!online){
		int i=guild_getindex(g,sd->status.account_id,sd->status.char_id);
		if(i>=0)
			g->member[i].sd=NULL;
		else
			ShowError("guild_send_memberinfoshort: Failed to locate member %d:%d in guild %d!\n", sd->status.account_id, sd->status.char_id, g->guild_id);
		return 0;
	}

	if(sd->state.connect_new) {	//Note that this works because it is invoked in parse_LoadEndAck before connect_new is cleared.
		clif_guild_belonginfo( *sd );
		sd->guild_emblem_id = g->emblem_id;
	}
	return 0;
}

int guild_recv_memberinfoshort(int guild_id,uint32 account_id,uint32 char_id,int online,int lv,int class_) { // cleaned up [LuzZza]

	int i,alv,c,idx=-1,om=0,oldonline=-1;
	struct guild *g = guild_search(guild_id);

	if(g == NULL)
		return 0;

	for(i=0,alv=0,c=0,om=0;i<g->max_member;i++){
		struct guild_member *m=&g->member[i];
		if(!m->account_id) continue;
		if(m->account_id==account_id && m->char_id==char_id ){
			oldonline=m->online;
			m->online=online;
			m->lv=lv;
			m->class_=class_;
			idx=i;
		}
		alv+=m->lv;
		c++;
		if(m->online)
			om++;
	}

	if(idx == -1 || c == 0) {
        //Treat char_id who doesn't match guild_id (not found as member)
		map_session_data *sd = map_id2sd(account_id);
		if(sd && sd->status.char_id == char_id) {
			sd->status.guild_id=0;
			sd->guild_emblem_id=0;
		}
		ShowWarning("guild: not found member %d,%d on %d[%s]\n",	account_id,char_id,guild_id,g->name);
		return 0;
	}

	g->average_lv=alv/c;
	g->connect_member=om;

	//Ensure validity of pointer (ie: player logs in/out, changes map-server)
	g->member[idx].sd = guild_sd_check(guild_id, account_id, char_id);

	if(oldonline!=online)
		clif_guild_memberlogin_notice(g, idx, online);

	if(!g->member[idx].sd)
		return 0;

	//Send XY dot updates. [Skotlex]
	//Moved from guild_send_memberinfoshort [LuzZza]
	for(i=0; i < g->max_member; i++) {

		if(!g->member[i].sd || i == idx ||
			g->member[i].sd->bl.m != g->member[idx].sd->bl.m)
			continue;

		clif_guild_xy_single(g->member[idx].sd->fd, g->member[i].sd);
		clif_guild_xy_single(g->member[i].sd->fd, g->member[idx].sd);
	}

	return 0;
}

/*====================================================
 * Send a message to whole guild
 *---------------------------------------------------*/
int guild_send_message(map_session_data *sd,const char *mes,int len) {
	nullpo_ret(sd);

	if(sd->status.guild_id==0)
		return 0;
	intif_guild_message(sd->status.guild_id,sd->status.account_id,mes,len);
	guild_recv_message(sd->status.guild_id,sd->status.account_id,mes,len);

	// Chat logging type 'G' / Guild Chat
	log_chat(LOG_CHAT_GUILD, sd->status.guild_id, sd->status.char_id, sd->status.account_id, mapindex_id2name(sd->mapindex), sd->bl.x, sd->bl.y, NULL, mes);

	return 0;
}

/*====================================================
 * Guild receive a message, will be displayed to whole member
 *---------------------------------------------------*/
int guild_recv_message(int guild_id,uint32 account_id,const char *mes,int len) {
	struct guild *g;
	if( (g=guild_search(guild_id))==NULL)
		return 0;
	clif_guild_message(g,account_id,mes,len);
	return 0;
}

/*====================================================
 * Member changing position in guild
 *---------------------------------------------------*/
int guild_change_memberposition(int guild_id,uint32 account_id,uint32 char_id,short idx) {
	return intif_guild_change_memberinfo(guild_id,account_id,char_id,GMI_POSITION,&idx,sizeof(idx));
}

/*====================================================
 * Notification of new position for member
 *---------------------------------------------------*/
int guild_memberposition_changed(struct guild *g,int idx,int pos) {
	nullpo_ret(g);

	g->member[idx].position=pos;
	clif_guild_memberpositionchanged(g,idx);

	// Update char position in client [LuzZza]
	if(g->member[idx].sd != NULL)
		clif_name_area(&g->member[idx].sd->bl);
	return 0;
}

/*====================================================
 * Change guild title or member
 *---------------------------------------------------*/
int guild_change_position(int guild_id,int idx, int mode, int exp_mode, const char *name) {
	struct guild_position p;

	exp_mode = cap_value(exp_mode, 0, battle_config.guild_exp_limit);
	p.mode = mode&GUILD_PERM_ALL;
	p.exp_mode=exp_mode;
	safestrncpy(p.name,name,NAME_LENGTH);
	return intif_guild_position(guild_id,idx,&p);
}

/*====================================================
 * Notification of member has changed his guild title
 *---------------------------------------------------*/
int guild_position_changed(int guild_id,int idx,struct guild_position *p) {
	struct guild *g=guild_search(guild_id);
	int i;
	if(g==NULL)
		return 0;
	memcpy(&g->position[idx],p,sizeof(struct guild_position));
	clif_guild_positionchanged(g,idx);

	// Update char name in client [LuzZza]
	for(i=0;i<g->max_member;i++)
		if(g->member[i].position == idx && g->member[i].sd != NULL)
			clif_name_area(&g->member[i].sd->bl);
	return 0;
}

/*====================================================
 * Change guild notice
 *---------------------------------------------------*/
int guild_change_notice(map_session_data *sd,int guild_id,const char *mes1,const char *mes2) {
	nullpo_ret(sd);

	if(guild_id!=sd->status.guild_id)
		return 0;
	return intif_guild_notice(guild_id,mes1,mes2);
}

/*====================================================
 * Notification of guild has changed his notice
 *---------------------------------------------------*/
int guild_notice_changed(int guild_id,const char *mes1,const char *mes2) {
	int i;
	struct guild *g=guild_search(guild_id);
	if(g==NULL)
		return 0;

	memcpy(g->mes1,mes1,MAX_GUILDMES1);
	memcpy(g->mes2,mes2,MAX_GUILDMES2);

	for(i=0;i<g->max_member;i++){
		map_session_data *sd = g->member[i].sd;
		if(sd != NULL)
			clif_guild_notice(sd);
	}
	return 0;
}

/*====================================================
 * Check condition for changing guild emblem
 *---------------------------------------------------*/
bool guild_check_emblem_change_condition(map_session_data *sd)
{
	nullpo_ret(sd);
	guild* g = sd->guild;

	if (battle_config.require_glory_guild && g != nullptr && guild_checkskill(g, GD_GLORYGUILD) > 0) {
		clif_skill_fail(sd, GD_GLORYGUILD, USESKILL_FAIL_LEVEL, 0);
		return false;
	}

	return true;
}

/*====================================================
 * Change guild emblem
 *---------------------------------------------------*/
int guild_change_emblem(map_session_data *sd,int len,const char *data) {
	nullpo_ret(sd);

	if (!guild_check_emblem_change_condition(sd)) {
		return 0;
	}

	return intif_guild_emblem(sd->status.guild_id,len,data);
}

/*====================================================
 * Change guild emblem version
 *---------------------------------------------------*/
int guild_change_emblem_version(map_session_data* sd, int version)
{
	nullpo_ret(sd);

	if (!guild_check_emblem_change_condition(sd)) {
		return 0;
	}

	return intif_guild_emblem_version(sd->status.guild_id, version);
}

/*====================================================
 * Notification of guild emblem changed
 *---------------------------------------------------*/
int guild_emblem_changed(int len,int guild_id,int emblem_id,const char *data) {
	int i;
	map_session_data *sd;
	struct guild *g=guild_search(guild_id);
	if(g==NULL)
		return 0;

	if (data != nullptr)
		memcpy(g->emblem_data,data,len);
	g->emblem_len=len;
	g->emblem_id=emblem_id;

	for(i=0;i<g->max_member;i++){
		if((sd=g->member[i].sd)!=NULL){
			sd->guild_emblem_id=emblem_id;
			clif_guild_belonginfo( *sd );
			clif_guild_emblem(sd,g);
			clif_guild_emblem_area(&sd->bl);
		}
	}
	{// update guardians (mobs)
		for (const auto &it : castle_db) {
			if( it.second->guild_id != guild_id )
				continue;
			// update permanent guardians
			for( i = 0; i < ARRAYLENGTH(it.second->guardian); ++i )
			{
				TBL_MOB* md = (it.second->guardian[i].id ? map_id2md(it.second->guardian[i].id) : NULL);
				if( md == NULL || md->guardian_data == NULL )
					continue;
				md->guardian_data->emblem_id = emblem_id;
				clif_guild_emblem_area(&md->bl);
			}
			// update temporary guardians
			for( i = 0; i < it.second->temp_guardians_max; ++i )
			{
				TBL_MOB* md = (it.second->temp_guardians[i] ? map_id2md(it.second->temp_guardians[i]) : NULL);
				if( md == NULL || md->guardian_data == NULL )
					continue;
				md->guardian_data->emblem_id = emblem_id;
				clif_guild_emblem_area(&md->bl);
			}
		}
	}
	{// update npcs (flags or other npcs that used flagemblem to attach to this guild)
		for( i = 0; i < guild_flags_count; i++ ) {
			if( guild_flags[i] && guild_flags[i]->u.scr.guild_id == guild_id ) {
				clif_guild_emblem_area(&guild_flags[i]->bl);
			}
		}
	}
	return 0;
}

/**
 * @see DBCreateData
 */
static DBData create_expcache(DBKey key, va_list args) {
	struct guild_expcache *c;
	map_session_data *sd = va_arg(args, map_session_data*);

	c = ers_alloc(expcache_ers, struct guild_expcache);
	c->guild_id = sd->status.guild_id;
	c->account_id = sd->status.account_id;
	c->char_id = sd->status.char_id;
	c->exp = 0;
	return db_ptr2data(c);
}

/*====================================================
 * Return taxed experience from player sd to guild
 *---------------------------------------------------*/
t_exp guild_payexp(map_session_data *sd,t_exp exp) {
	struct guild *g;
	struct guild_expcache *c;
	int per;

	nullpo_ret(sd);

	if (!exp) return 0;

	if (sd->status.guild_id == 0 ||
		(g = sd->guild) == NULL ||
		(per = guild_getposition(sd)) < 0 ||
		(per = g->position[per].exp_mode) < 1)
		return 0;


	if (per < 100)
		exp = exp * per / 100;
	//Otherwise tax everything.

	c = (struct guild_expcache *)db_data2ptr(guild_expcache_db->ensure(guild_expcache_db, db_i2key(sd->status.char_id), create_expcache, sd));
	c->exp = util::safe_addition_cap(c->exp, exp, MAX_GUILD_EXP);

	return exp;
}

/*====================================================
 * Player sd pay a tribute experience to his guild
 * Add this experience to guild exp
 * [Celest]
 *---------------------------------------------------*/
t_exp guild_getexp(map_session_data *sd,t_exp exp) {
	struct guild_expcache *c;
	nullpo_ret(sd);

	if (sd->status.guild_id == 0 || sd->guild == NULL)
		return 0;

	c = (struct guild_expcache *)db_data2ptr(guild_expcache_db->ensure(guild_expcache_db, db_i2key(sd->status.char_id), create_expcache, sd));
	c->exp = util::safe_addition_cap(c->exp, exp, MAX_GUILD_EXP);

	return exp;
}

/*====================================================
 * Ask to increase guildskill skill_id
 *---------------------------------------------------*/
void guild_skillup(map_session_data* sd, uint16 skill_id) {
	struct guild* g;
	short idx = guild_skill_get_index(skill_id);
	short max = 0;

	nullpo_retv(sd);

	if (idx == -1)
		return;

	if( sd->status.guild_id == 0 || (g=sd->guild) == NULL || // no guild
		strcmp(sd->status.name, g->master) ) // not the guild master
		return;

	max = guild_skill_get_max(skill_id);

	if( g->skill_point > 0 &&
		g->skill[idx].id != 0 &&
		g->skill[idx].lv < max )
		intif_guild_skillup(g->guild_id, skill_id, sd->status.account_id, max);
}

/*====================================================
 * Notification of guildskill skill_id increase request
 *---------------------------------------------------*/
int guild_skillupack(int guild_id,uint16 skill_id,uint32 account_id) {
	map_session_data *sd = map_id2sd(account_id);
	struct guild *g = guild_search(guild_id);
	int i;
	short idx = guild_skill_get_index(skill_id);

	if (g == NULL || idx == -1)
		return 0;
	if (sd != NULL) {
		int lv = g->skill[idx].lv;
		int range = skill_get_range(skill_id, lv);
		clif_skillup(sd,skill_id,lv,range,1);

		/* Guild Aura handling */
		switch( skill_id ) {
			case GD_LEADERSHIP:
			case GD_GLORYWOUNDS:
			case GD_SOULCOLD:
			case GD_HAWKEYES:
					guild_guildaura_refresh(sd,skill_id,g->skill[idx].lv);
				break;
		}
	}

	// Inform all members
	for (i = 0; i < g->max_member; i++)
		if ((sd = g->member[i].sd) != NULL)
			clif_guild_skillinfo(sd);

	return 0;
}

void guild_guildaura_refresh(map_session_data *sd, uint16 skill_id, uint16 skill_lv) {
	if( !(battle_config.guild_aura&(is_agit_start()?2:1)) &&
			!(battle_config.guild_aura&(map_flag_gvg2(sd->bl.m)?8:4)) )
		return;
	if( !skill_lv )
		return;

	sc_type type = skill_get_sc(skill_id);

	if (type == SC_NONE)
		return;

	status_change_end(&sd->bl, type);

	std::shared_ptr<s_skill_unit_group> group = skill_unitsetting(&sd->bl,skill_id,skill_lv,sd->bl.x,sd->bl.y,0);

	if( group )
		sc_start4(NULL,&sd->bl,type,100,(battle_config.guild_aura&16)?0:skill_lv,0,0,group->group_id,600000);//duration doesn't matter these status never end with val4
	return;
}

/*====================================================
 * Count number of relations the guild has.
 * Flag:
 *	0 = allied
 *	1 = enemy
 *---------------------------------------------------*/
int guild_get_alliance_count(struct guild *g,int flag) {
	int i,c;

	nullpo_ret(g);

	for(i=c=0;i<MAX_GUILDALLIANCE;i++){
		if(	g->alliance[i].guild_id>0 &&
			g->alliance[i].opposition==flag )
			c++;
	}
	return c;
}

// Blocks all guild skills which have a common delay time.
void guild_block_skill(map_session_data *sd, int time) {
	uint16 skill_id[] = { GD_BATTLEORDER, GD_REGENERATION, GD_RESTORE, GD_EMERGENCYCALL };
	int i;
	for (i = 0; i < 4; i++)
		skill_blockpc_start(sd, skill_id[i], time);
}

/*====================================================
 * Check relation between guild_id1 and guild_id2.
 * Flag:
 *	0 = allied
 *	1 = enemy
 * Returns true if yes.
 *---------------------------------------------------*/
int guild_check_alliance(int guild_id1, int guild_id2, int flag) {
	struct guild *g;
	int i;

	g = guild_search(guild_id1);
	if (g == NULL)
		return 0;

	ARR_FIND( 0, MAX_GUILDALLIANCE, i, g->alliance[i].guild_id == guild_id2 && g->alliance[i].opposition == flag );
	return( i < MAX_GUILDALLIANCE ) ? 1 : 0;
}

/*====================================================
 * Player sd, asking player tsd an alliance between their 2 guilds
 *---------------------------------------------------*/
int guild_reqalliance(map_session_data *sd,map_session_data *tsd) {
	struct guild *g[2];
	int i;

	if(is_agit_start()) {	// Disable alliance creation during woe [Valaris]
		clif_displaymessage(sd->fd,msg_txt(sd,676)); //"Alliances cannot be made during Guild Wars!"
		return 0;
	}	// end addition [Valaris]


	nullpo_ret(sd);

	if(tsd==NULL || tsd->status.guild_id<=0)
		return 0;

	// Check, is tsd guild master, if not - cancel alliance. [f0und3r]
	if (battle_config.guild_alliance_onlygm && !tsd->state.gmaster_flag) {
		clif_guild_allianceack(sd, 5);
		return 0;
	}

	g[0]=sd->guild;
	g[1]=tsd->guild;

	if(g[0]==NULL || g[1]==NULL)
		return 0;

	// Prevent creation alliance with same guilds [LuzZza]
	if(sd->status.guild_id == tsd->status.guild_id)
		return 0;

	if( guild_get_alliance_count(g[0],0) >= battle_config.max_guild_alliance ) {
		clif_guild_allianceack(sd,4);
		return 0;
	}
	if( guild_get_alliance_count(g[1],0) >= battle_config.max_guild_alliance ) {
		clif_guild_allianceack(sd,3);
		return 0;
	}

	if( tsd->guild_alliance>0 ){
		clif_guild_allianceack(sd,1);
		return 0;
	}

    for (i = 0; i < MAX_GUILDALLIANCE; i++) { // check if already allied
		if(	g[0]->alliance[i].guild_id==tsd->status.guild_id &&
			g[0]->alliance[i].opposition==0){
			clif_guild_allianceack(sd,0);
			return 0;
		}
	}

	tsd->guild_alliance=sd->status.guild_id;
	tsd->guild_alliance_account=sd->status.account_id;

	clif_guild_reqalliance(tsd,sd->status.account_id,g[0]->name);
	return 0;
}

/*====================================================
 * Player sd, answer to player tsd (account_id) for an alliance request
 *---------------------------------------------------*/
int guild_reply_reqalliance(map_session_data *sd,uint32 account_id,int flag) {
	map_session_data *tsd;

	nullpo_ret(sd);
	tsd= map_id2sd( account_id );
	if (!tsd) { //Character left? Cancel alliance.
		clif_guild_allianceack(sd,3);
		return 0;
	}

	if (sd->guild_alliance != tsd->status.guild_id) // proposed guild_id alliance doesn't match tsd guildid
		return 0;

	if (flag == 1) { // consent
		int i;

	struct guild *g, *tg; // Reconfirm the number of alliance
		g=sd->guild;
		tg=tsd->guild;

		if(g==NULL || guild_get_alliance_count(g,0) >= battle_config.max_guild_alliance){
			clif_guild_allianceack(sd,4);
			clif_guild_allianceack(tsd,3);
			return 0;
		}
		if(tg==NULL || guild_get_alliance_count(tg,0) >= battle_config.max_guild_alliance){
			clif_guild_allianceack(sd,3);
			clif_guild_allianceack(tsd,4);
			return 0;
		}

		for(i=0;i<MAX_GUILDALLIANCE;i++){
			if(g->alliance[i].guild_id==tsd->status.guild_id &&
				g->alliance[i].opposition==1)
				intif_guild_alliance( sd->status.guild_id,tsd->status.guild_id,
					sd->status.account_id,tsd->status.account_id,9 );
		}
		for(i=0;i<MAX_GUILDALLIANCE;i++){
			if(tg->alliance[i].guild_id==sd->status.guild_id &&
				tg->alliance[i].opposition==1)
				intif_guild_alliance( tsd->status.guild_id,sd->status.guild_id,
					tsd->status.account_id,sd->status.account_id,9 );
		}

	// inform other servers
		intif_guild_alliance( sd->status.guild_id,tsd->status.guild_id,
			sd->status.account_id,tsd->status.account_id,0 );
		return 0;
	} else { // deny
		sd->guild_alliance=0;
		sd->guild_alliance_account=0;
		if(tsd!=NULL)
			clif_guild_allianceack(tsd,3);
	}
	return 0;
}

/*====================================================
 * Player sd asking to break alliance with guild guild_id
 *---------------------------------------------------*/
int guild_delalliance(map_session_data *sd,int guild_id,int flag) {
	nullpo_ret(sd);

	if(is_agit_start()) {	// Disable alliance breaking during woe [Valaris]
		clif_displaymessage(sd->fd,msg_txt(sd,677)); //"Alliances cannot be broken during Guild Wars!"
		return 0;
	}	// end addition [Valaris]

	intif_guild_alliance( sd->status.guild_id,guild_id,sd->status.account_id,0,flag|8 );
	return 0;
}

/*====================================================
 * Player sd, asking player tsd a formal enemy relation between their 2 guilds
 *---------------------------------------------------*/
int guild_opposition(map_session_data *sd,map_session_data *tsd) {
	struct guild *g;
	int i;

	nullpo_ret(sd);

	g=sd->guild;
	if(g==NULL || tsd==NULL)
		return 0;

	// Prevent creation opposition with same guilds [LuzZza]
	if(sd->status.guild_id == tsd->status.guild_id)
		return 0;

	if( guild_get_alliance_count(g,1) >= battle_config.max_guild_alliance )	{
		clif_guild_oppositionack(sd,1);
		return 0;
	}

	for (i = 0; i < MAX_GUILDALLIANCE; i++) { // checking relations
		if(g->alliance[i].guild_id==tsd->status.guild_id){
			if (g->alliance[i].opposition == 1) { // check if not already hostile
				clif_guild_oppositionack(sd,2);
				return 0;
			}
			if(is_agit_start()) // Prevent the changing of alliances to oppositions during WoE.
				return 0;
			//Change alliance to opposition.
			intif_guild_alliance( sd->status.guild_id,tsd->status.guild_id,
				sd->status.account_id,tsd->status.account_id,8 );
		}
	}

	// inform other serv
	intif_guild_alliance( sd->status.guild_id,tsd->status.guild_id,
			sd->status.account_id,tsd->status.account_id,1 );
	return 0;
}

/*====================================================
 * Notification of a relationship between 2 guilds
 *---------------------------------------------------*/
int guild_allianceack(int guild_id1,int guild_id2,uint32 account_id1,uint32 account_id2,int flag,const char *name1,const char *name2)
{
	struct guild *g[2];
	int guild_id[2];
	const char *guild_name[2];
	map_session_data *sd[2];
	int j,i;

	guild_id[0] = guild_id1;
	guild_id[1] = guild_id2;
	guild_name[0] = name1;
	guild_name[1] = name2;
	sd[0] = map_id2sd(account_id1);
	sd[1] = map_id2sd(account_id2);

	g[0]=guild_search(guild_id1);
	g[1]=guild_search(guild_id2);

	if(sd[0]!=NULL && (flag&0x0f)==0){
		sd[0]->guild_alliance=0;
		sd[0]->guild_alliance_account=0;
	}

	if (flag & 0x70) { // failure
		for(i=0;i<2-(flag&1);i++)
			if( sd[i]!=NULL )
				clif_guild_allianceack(sd[i],((flag>>4)==i+1)?3:4);
		return 0;
	}

	if (!(flag & 0x08)) { // new relationship
		for(i=0;i<2-(flag&1);i++) {
			if(g[i]!=NULL) {
				ARR_FIND( 0, MAX_GUILDALLIANCE, j, g[i]->alliance[j].guild_id == 0 );
				if( j < MAX_GUILDALLIANCE ) {
					g[i]->alliance[j].guild_id=guild_id[1-i];
					memcpy(g[i]->alliance[j].name,guild_name[1-i],NAME_LENGTH);
					g[i]->alliance[j].opposition=flag&1;
				}
			}
		}
	} else { // remove relationship
		for(i=0;i<2-(flag&1);i++) {
			if(g[i]!=NULL) {
				for(j=0;j<g[i]->max_member;j++) channel_pcquit(g[i]->member[j].sd,2); //leave all alliance chan
				ARR_FIND( 0, MAX_GUILDALLIANCE, j, g[i]->alliance[j].guild_id == guild_id[1-i] && g[i]->alliance[j].opposition == (flag&1) );
				if( j < MAX_GUILDALLIANCE )
					g[i]->alliance[j].guild_id = 0;
			}
		if (sd[i] != NULL) // notify players
				clif_guild_delalliance(sd[i],guild_id[1-i],(flag&1));
		}
	}

	if ((flag & 0x0f) == 0) { // alliance notification
		if( sd[1]!=NULL )
			clif_guild_allianceack(sd[1],2);
	} else if ((flag & 0x0f) == 1) { // enemy notification
		if( sd[0]!=NULL )
			clif_guild_oppositionack(sd[0],0);
	}


	for (i = 0; i < 2 - (flag & 1); i++) { // Retransmission of the relationship list to all members
		if(g[i]!=NULL)
			for(j=0;j<g[i]->max_member;j++) {
				map_session_data *sd_mem = g[i]->member[j].sd;
				if( sd_mem!=NULL){
					clif_guild_allianceinfo(sd_mem);

					// join ally channel
					if( channel_config.ally_tmpl.name[0] && (channel_config.ally_tmpl.opt&CHAN_OPT_AUTOJOIN) ) {
						channel_gjoin(sd_mem,2);
					}
				}
			}
	}
	return 0;
}

/**
 * Notification for the guild disbanded
 * @see DBApply
 */
int guild_broken_sub(DBKey key, DBData *data, va_list ap) {
	struct guild *g = (struct guild *)db_data2ptr(data);
	int guild_id=va_arg(ap,int);
	int i,j;
	map_session_data *sd=NULL;

	nullpo_ret(g);

	for(i=0;i<MAX_GUILDALLIANCE;i++){	// Destroy all relationships
		if(g->alliance[i].guild_id==guild_id){
			for(j=0;j<g->max_member;j++)
				if( (sd=g->member[j].sd)!=NULL )
					clif_guild_delalliance(sd,guild_id,g->alliance[i].opposition);
			intif_guild_alliance(g->guild_id, guild_id,0,0,g->alliance[i].opposition|8);
			g->alliance[i].guild_id=0;
		}
	}
	return 0;
}

/**
 * Invoked on Castles when a guild is broken. [Skotlex]
 * @see DBApply
 */
void castle_guild_broken_sub(int guild_id) {
	for (const auto &it : castle_db) {
		std::shared_ptr<guild_castle> gc = it.second;
		if (gc->guild_id == guild_id) {
			char name[EVENT_NAME_LENGTH];
			// We call castle_event::OnGuildBreak of all castles of the guild
			// You can set all castle_events in the 'db/castle_db.txt'
			safesnprintf(name, EVENT_NAME_LENGTH, "%s::%s", gc->castle_event, script_config.guild_break_event_name);
			npc_event_do(name);

			//Save the new 'owner', this should invoke guardian clean up and other such things.
			guild_castledatasave(gc->castle_id, CD_GUILD_ID, 0);
		}
	}
}

//Invoked on /breakguild "Guild name"
int guild_broken(int guild_id,int flag) {
	struct guild *g = guild_search(guild_id);
	int i;

	if (flag != 0 || g == NULL)
		return 0;

	for (i = 0; i < g->max_member; i++){	// Destroy all relationships
		map_session_data *sd = g->member[i].sd;
		if(sd != NULL){
			if(sd->state.storage_flag == 2)
				storage_guild_storage_quit(sd,1);
			sd->status.guild_id=0;
			sd->guild = NULL;
			sd->state.gmaster_flag = 0;
			clif_guild_broken(g->member[i].sd,0);
			clif_name_area(&sd->bl); // [LuzZza]
			status_change_end(&sd->bl,SC_LEADERSHIP);
			status_change_end(&sd->bl,SC_GLORYWOUNDS);
			status_change_end(&sd->bl,SC_SOULCOLD);
			status_change_end(&sd->bl,SC_HAWKEYES);
			status_change_end(&sd->bl,SC_EMERGENCY_MOVE);
		}
	}

	guild_db->foreach(guild_db,guild_broken_sub,guild_id);
	castle_guild_broken_sub(guild_id);
	storage_guild_delete(guild_id);
	if( channel_config.ally_tmpl.name[0] ) {
		channel_delete(g->channel,false);
	}
	idb_remove(guild_db,guild_id);
	return 0;
}

/** Changes the Guild Master to the specified player. [Skotlex]
* @param guild_id
* @param sd New guild master
*/
int guild_gm_change(int guild_id, uint32 char_id) {
	struct guild *g;
	char *name;
	int i;

	g = guild_search(guild_id);

	nullpo_ret(g);

	ARR_FIND(0, MAX_GUILD, i, g->member[i].char_id == char_id);
	
	if( i == MAX_GUILD ){
		// Not part of the guild
		return 0;
	}

	name = g->member[i].name;

	if (strcmp(g->master, name) == 0) //Nothing to change.
		return 0;

	//Notify servers that master has changed.
	intif_guild_change_gm(guild_id, name, strlen(name)+1);
	return 1;
}

/** Notification from Char server that a guild's master has changed. [Skotlex]
* @param guild_id
* @param account_id
* @param char_id
*/
int guild_gm_changed(int guild_id, uint32 account_id, uint32 char_id, time_t time) {
	struct guild *g;
	struct guild_member gm;
	int pos, i;

	g=guild_search(guild_id);

	if (!g)
		return 0;

	for(pos=0; pos<g->max_member && !(
		g->member[pos].account_id==account_id &&
		g->member[pos].char_id==char_id);
		pos++);

	if (pos == 0 || pos == g->max_member) return 0;

	memcpy(&gm, &g->member[pos], sizeof (struct guild_member));
	memcpy(&g->member[pos], &g->member[0], sizeof(struct guild_member));
	memcpy(&g->member[0], &gm, sizeof(struct guild_member));

	g->member[pos].position = g->member[0].position;
	g->member[0].position = 0; //Position 0: guild Master.
	strcpy(g->master, g->member[0].name);

	if (g->member[pos].sd && g->member[pos].sd->fd) {
		clif_displaymessage(g->member[pos].sd->fd, msg_txt(g->member[pos].sd,678)); //"You no longer are the Guild Master."
		g->member[pos].sd->state.gmaster_flag = 0;
		clif_name_area(&g->member[pos].sd->bl);
	}

	if (g->member[0].sd && g->member[0].sd->fd) {
		clif_displaymessage(g->member[0].sd->fd, msg_txt(g->member[pos].sd,679)); //"You have become the Guild Master!"
		g->member[0].sd->state.gmaster_flag = 1;
		clif_name_area(&g->member[0].sd->bl);
		//Block his skills to prevent abuse.
#ifndef RENEWAL
		if (battle_config.guild_skill_relog_delay)
			guild_block_skill(g->member[0].sd, battle_config.guild_skill_relog_delay);
#endif
	}

	// announce the change to all guild members
	for( i = 0; i < g->max_member; i++ ) {
		if( g->member[i].sd ){
			clif_guild_basicinfo( *g->member[i].sd );
			clif_guild_memberlist( *g->member[i].sd );
			clif_guild_belonginfo( *g->member[i].sd ); // Update clientside guildmaster flag
		}
	}

	// Store changing time
	g->last_leader_change = time;

	return 1;
}

/** Disband a guild
* @param sd Player who breaks the guild
* @param name Guild name
*/
int guild_break(map_session_data *sd,char *name) {
	struct guild *g;
	struct unit_data *ud;
	int i;
#ifdef BOUND_ITEMS
	int j;
	int idxlist[MAX_INVENTORY];
#endif

	nullpo_ret(sd);

	if ((g=sd->guild)==NULL)
		return 0;
	if (strcmp(g->name,name) != 0)
		return 0;
	if (!sd->state.gmaster_flag)
		return 0;
	for (i = 0; i < g->max_member; i++) {
		if(	g->member[i].account_id>0 && (
			g->member[i].account_id!=sd->status.account_id ||
			g->member[i].char_id!=sd->status.char_id ))
			break;
	}
	if (i < g->max_member) {
		clif_guild_broken(sd,2);
		return 0;
	}

	if (g->instance_id)
		instance_destroy(g->instance_id);

	/* Regardless of char server allowing it, we clear the guild master's auras */
	if ((ud = unit_bl2ud(&sd->bl))) {
		std::vector<std::shared_ptr<s_skill_unit_group>> group;

		for (const auto su : ud->skillunits) {
			switch (su->skill_id) {
				case GD_LEADERSHIP:
				case GD_GLORYWOUNDS:
				case GD_SOULCOLD:
				case GD_HAWKEYES:
					group.push_back(su);
					break;
			}
		}

		for (auto it = group.begin(); it != group.end(); it++) {
			skill_delunitgroup(*it);
		}
	}

#ifdef BOUND_ITEMS
	//Guild bound item check - Removes the bound flag
	j = pc_bound_chk(sd,BOUND_GUILD,idxlist);
	for(i = 0; i < j; i++)
		pc_delitem(sd,idxlist[i],sd->inventory.u.items_inventory[idxlist[i]].amount,0,1,LOG_TYPE_BOUND_REMOVAL);
#endif

	intif_guild_break(g->guild_id);
	return 1;
}

/**
 * Creates a list of guild castle IDs to be requested
 * from char-server.
 */
void guild_castle_map_init(void) {
	std::vector<int32> castle_ids;

	for( const auto &it : castle_db ){
		castle_ids.push_back( it.first );
	}

	if( !castle_ids.empty() && intif_guild_castle_dataload( castle_ids ) ){
		ShowStatus( "Requested '" CL_WHITE "%" PRIdPTR CL_RESET "' guild castles from char-server...\n", castle_ids.size() );
	}
}

/**
 * Setter function for members of guild_castle struct.
 * Handles all side-effects, like updating guardians.
 * Sends updated info to char-server for saving.
 * @param castle_id Castle ID
 * @param index Type of data to change
 * @param value New value
 */
int guild_castledatasave(int castle_id, int index, int value) {
	std::shared_ptr<guild_castle> gc = castle_db.find(castle_id);

	if (gc == nullptr) {
		ShowWarning("guild_castledatasave: guild castle '%d' not found\n", castle_id);
		return 0;
	}

	switch (index) {
	case CD_GUILD_ID: // The castle's owner has changed? Update or remove Guardians too. [Skotlex]
	{
		int i;
		gc->guild_id = value;
		for (i = 0; i < MAX_GUARDIANS; i++){
			struct mob_data *gd;
			if (gc->guardian[i].visible && (gd = map_id2md(gc->guardian[i].id)) != NULL)
				mob_guardian_guildchange(gd);
		}
		break;
	}
	case CD_CURRENT_ECONOMY:
		gc->economy = value; break;
	case CD_CURRENT_DEFENSE: // defense invest change -> recalculate guardian hp
	{
		int i;
		gc->defense = value;
		for (i = 0; i < MAX_GUARDIANS; i++){
			struct mob_data *gd;
			if (gc->guardian[i].visible && (gd = map_id2md(gc->guardian[i].id)) != NULL)
				status_calc_mob(gd, SCO_NONE);
		}
		break;
	}
	case CD_INVESTED_ECONOMY:
		gc->triggerE = value; break;
	case CD_INVESTED_DEFENSE:
		gc->triggerD = value; break;
	case CD_NEXT_TIME:
		gc->nextTime = value; break;
	case CD_PAY_TIME:
		gc->payTime = value; break;
	case CD_CREATE_TIME:
		gc->createTime = value; break;
	case CD_ENABLED_KAFRA:
		gc->visibleC = value; break;
	default:
		if (index >= CD_ENABLED_GUARDIAN00 && index < CD_MAX) {
			gc->guardian[index - CD_ENABLED_GUARDIAN00].visible = value;
			break;
		}
		ShowWarning("guild_castledatasave: index = '%d' is out of allowed range\n", index);
		return 0;
	}

	if (!intif_guild_castle_datasave(castle_id, index, value)) {
		guild_castle_reconnect(castle_id, index, value);
	}
	return 0;
}

void guild_castle_reconnect_sub(void *key, void *data, va_list ap) {
	int castle_id = GetWord((int)__64BPRTSIZE(key), 0);
	int index = GetWord((int)__64BPRTSIZE(key), 1);
	intif_guild_castle_datasave(castle_id, index, *(int *)data);
	aFree(data);
}

/**
 * Saves pending guild castle data changes when char-server is
 * disconnected.
 * On reconnect pushes all changes to char-server for saving.
 * @param castle_id
 * @param index
 * @param value
 */
void guild_castle_reconnect(int castle_id, int index, int value) {
	static struct linkdb_node *gc_save_pending = NULL;

	if (castle_id < 0) { // char-server reconnected
		linkdb_foreach(&gc_save_pending, guild_castle_reconnect_sub);
		linkdb_final(&gc_save_pending);
	} else {
		int *data;
		CREATE(data, int, 1);
		*data = value;
		linkdb_replace(&gc_save_pending, (void*)__64BPRTSIZE((MakeDWord(castle_id, index))), data);
	}
}

/** Load castle data then invoke OnAgitInit* on last
* @param len
* @param gc Guild Castle data
*/
int guild_castledataloadack(int len, struct guild_castle *gc) {
	int i;
	int n = (len-4) / sizeof(struct guild_castle);
	int ev;

	nullpo_ret(gc);

	//Last owned castle in the list invokes ::OnAgitInit
	for( i = n-1; i >= 0 && !(gc[i].guild_id); --i );
	ev = i; // offset of castle or -1

	if( ev < 0 ) { //No castles owned, invoke OnAgitInit as it is.
		npc_event_doall( script_config.agit_init_event_name );
		npc_event_doall( script_config.agit_init2_event_name );
		npc_event_doall( script_config.agit_init3_event_name );
	} else // load received castles into memory, one by one
	for( i = 0; i < n; i++, gc++ ) {
		std::shared_ptr<guild_castle> c = castle_db.find(gc->castle_id);

		if (c == nullptr) {
			ShowError("guild_castledataloadack: castle id=%d not found.\n", gc->castle_id);
			continue;
		}

		// update map-server castle data with new info
		memcpy(&c->guild_id, &gc->guild_id, sizeof(struct guild_castle) - offsetof(struct guild_castle, guild_id));

		if( c->guild_id ) {
			if( i != ev )
				guild_request_info(c->guild_id);
			else { // last owned one
				char event_name[EVENT_NAME_LENGTH];

				snprintf( event_name, EVENT_NAME_LENGTH, "::%s", script_config.agit_init_event_name );
				guild_npc_request_info(c->guild_id, event_name);
				snprintf( event_name, EVENT_NAME_LENGTH, "::%s", script_config.agit_init2_event_name );
				guild_npc_request_info(c->guild_id, event_name);
				snprintf( event_name, EVENT_NAME_LENGTH, "::%s", script_config.agit_init3_event_name );
				guild_npc_request_info(c->guild_id, event_name);
			}
		}
	}
	ShowStatus("Received '" CL_WHITE "%d" CL_RESET "' guild castles from char-server.\n", n);
	return 0;
}

/**
 * Start WoE:FE and triggers all npc OnAgitStart
 */
bool guild_agit_start(void){
	if( agit_flag ){
		return false;
	}

	agit_flag = true;

	npc_event_runall( script_config.agit_start_event_name );

	return true;
}

/**
 * End WoE:FE and triggers all npc OnAgitEnd
 */
bool guild_agit_end(void){
	if( !agit_flag ){
		return false;
	}

	agit_flag = false;

	npc_event_runall( script_config.agit_end_event_name );

	return true;
}

/**
 * Start WoE:SE and triggers all npc OnAgitStart2
 */
bool guild_agit2_start(void){
	if( agit2_flag ){
		return false;
	}

	agit2_flag = true;

	npc_event_runall( script_config.agit_start2_event_name );

	return true;
}

/**
 * End WoE:SE and triggers all npc OnAgitEnd2
 */
bool guild_agit2_end(void){
	if( !agit2_flag ){
		return false;
	}

	agit2_flag = false;

	npc_event_runall( script_config.agit_end2_event_name );

	return true;
}

/**
 * Start WoE:TE and triggers all npc OnAgitStart3
 */
bool guild_agit3_start(void){
	if( agit3_flag ){
		return false;
	}

	agit3_flag = true;

	npc_event_runall( script_config.agit_start3_event_name );

	return true;
}

/**
 * End WoE:TE and triggers all npc OnAgitEnd3
 */
bool guild_agit3_end(void){
	if( !agit3_flag ){
		return false;
	}

	agit3_flag = false;

	npc_event_runall( script_config.agit_end3_event_name );

	return true;
}

// How many castles does this guild have?
int guild_checkcastles(struct guild *g) {
	nullpo_retr(0, g);

	int nb_cas = 0;
	for (const auto &it : castle_db) {
		if (it.second->guild_id == g->guild_id)
			nb_cas++;
	}
	return nb_cas;
}

// Are these two guilds allied?
bool guild_isallied(int guild_id, int guild_id2) {
	int i;
	struct guild* g = guild_search(guild_id);
	nullpo_ret(g);

	ARR_FIND( 0, MAX_GUILDALLIANCE, i, g->alliance[i].guild_id == guild_id2 );
	return( i < MAX_GUILDALLIANCE && g->alliance[i].opposition == 0 );
}

void guild_flag_add(struct npc_data *nd) {
	int i;

	/* check */
	for( i = 0; i < guild_flags_count; i++ ) {
		if( guild_flags[i] && guild_flags[i]->bl.id == nd->bl.id ) {
			return;/* exists, most likely updated the id. */
		}
	}

	i = guild_flags_count;/* save the current slot */
	/* add */
	RECREATE(guild_flags,struct npc_data*,++guild_flags_count);
	/* save */
	guild_flags[i] = nd;
}

void guild_flag_remove(struct npc_data *nd) {
	int i, cursor;
	if( guild_flags_count == 0 )
		return;
	/* find it */
	for( i = 0; i < guild_flags_count; i++ ) {
		if( guild_flags[i] && guild_flags[i]->bl.id == nd->bl.id ) {/* found */
			guild_flags[i] = NULL;
			break;
		}
	}

	/* compact list */
	for( i = 0, cursor = 0; i < guild_flags_count; i++ ) {
		if( guild_flags[i] == NULL )
			continue;

		if( cursor != i ) {
			memmove(&guild_flags[cursor], &guild_flags[i], sizeof(struct npc_data*));
		}

		cursor++;
	}
}

/**
 * @see DBApply
 */
static int eventlist_db_final(DBKey key, DBData *data, va_list ap) {
	struct eventlist *next = NULL;
	struct eventlist *current = (struct eventlist *)db_data2ptr(data);
	while (current != NULL) {
		next = current->next;
		aFree(current);
		current = next;
	}
	return 0;
}

/**
 * @see DBApply
 */
static int guild_expcache_db_final(DBKey key, DBData *data, va_list ap) {
	ers_free(expcache_ers, db_data2ptr(data));
	return 0;
}

/* called when scripts are reloaded/unloaded */
void guild_flags_clear(void) {
	int i;
	for( i = 0; i < guild_flags_count; i++ ) {
		if( guild_flags[i] )
			guild_flags[i] = NULL;
	}

	guild_flags_count = 0;
}

void do_init_guild(void) {
	guild_db           = idb_alloc(DB_OPT_RELEASE_DATA);
	guild_expcache_db  = idb_alloc(DB_OPT_BASE);
	guild_infoevent_db = idb_alloc(DB_OPT_BASE);
	expcache_ers = ers_new(sizeof(struct guild_expcache),"guild.cpp::expcache_ers",ERS_OPT_NONE);

	guild_flags_count = 0;

	castle_db.load();
	guild_skill_tree_db.load();

	add_timer_func_list(guild_payexp_timer,"guild_payexp_timer");
	add_timer_func_list(guild_send_xy_timer, "guild_send_xy_timer");
	add_timer_interval(gettick()+GUILD_PAYEXP_INTERVAL,guild_payexp_timer,0,0,GUILD_PAYEXP_INTERVAL);
	add_timer_interval(gettick()+GUILD_SEND_XY_INTERVAL,guild_send_xy_timer,0,0,GUILD_SEND_XY_INTERVAL);
}

void do_final_guild(void) {
	DBIterator *iter = db_iterator(guild_db);
	struct guild *g;

	for( g = (struct guild *)dbi_first(iter); dbi_exists(iter); g = (struct guild *)dbi_next(iter) ) {
		channel_delete(g->channel,false);
	}
	dbi_destroy(iter);

	db_destroy(guild_db);
	castle_db.clear();
	guild_expcache_db->destroy(guild_expcache_db,guild_expcache_db_final);
	guild_infoevent_db->destroy(guild_infoevent_db,eventlist_db_final);
	ers_destroy(expcache_ers);

	aFree(guild_flags);/* never empty; created on boot */
}