#include <string.h>

#include "clif.h"
#include "itemdb.h"
#include "map.h"
#include "trade.h"
#include "pc.h"
#include "npc.h"

/*==========================================
 * 庢堷梫惪傪憡庤偵憲傞
 *------------------------------------------
 */
void trade_traderequest(struct map_session_data *sd,int target_id)
{
	struct map_session_data *target_sd;

	if((target_sd = map_id2sd(target_id)) != NULL){
		if((target_sd->trade_partner !=0) || (sd->trade_partner !=0)){
			clif_tradestart(sd,2); //person is in another trade
		}
		else{
			if(sd->bl.m != target_sd->bl.m
			 || (sd->bl.x - target_sd->bl.x <= -5 || sd->bl.x - target_sd->bl.x >= 5)
			 || (sd->bl.y - target_sd->bl.y <= -5 || sd->bl.y - target_sd->bl.y >= 5)) {
				clif_tradestart(sd,0); //too far
			}
			else{
				target_sd->trade_partner = sd->status.account_id;
				sd->trade_partner = target_sd->status.account_id;
				clif_traderequest(target_sd,sd->status.name);
			}
		}
	}
	else{
		clif_tradestart(sd,1); //character does not exist
	}
}

/*==========================================
 * 庢堷梫惪
 *------------------------------------------
 */
void trade_tradeack(struct map_session_data *sd,int type)
{
	struct map_session_data *target_sd;

	if((target_sd = map_id2sd(sd->trade_partner)) != NULL){
		clif_tradestart(target_sd,type);
		clif_tradestart(sd,type);
		if(type == 4){ // Cancel
			sd->deal_locked =0;
			sd->trade_partner=0;
			target_sd->deal_locked=0;
			target_sd->trade_partner=0;
		}
		if(sd->npc_id != 0)
			npc_event_dequeue(sd);
		if(target_sd->npc_id != 0)
			npc_event_dequeue(target_sd);
	}
}

/*==========================================
 * 傾僀僥儉捛壛
 *------------------------------------------
 */
void trade_tradeadditem(struct map_session_data *sd,int index,int amount)
{
	struct map_session_data *target_sd;
	int trade_i;

	if(((target_sd = map_id2sd(sd->trade_partner)) != NULL) && (sd->deal_locked < 1)){
		if(index<2 || index>=MAX_INVENTORY+2){
			if(index == 0 && amount > 0 && amount <= sd->status.zeny){
				sd->deal_zeny=amount;
				clif_tradeadditem(sd,target_sd,0,amount);
			}
		}else if(amount <= sd->status.inventory[index-2].amount && amount > 0){
			for(trade_i=0; trade_i<10;trade_i++){
				if(sd->deal_item_amount[trade_i] == 0){
					if(target_sd->weight + sd->inventory_data[index-2]->weight*sd->status.inventory[index-2].amount > target_sd->max_weight){
						clif_tradeitemok(sd,index,1); //fail to add item -- the player was over weighted.
					}else{
						sd->deal_item_index[trade_i] =index;
						sd->deal_item_amount[trade_i]=amount;
						clif_tradeitemok(sd,index,0); //success to add item
						clif_tradeadditem(sd,target_sd,index,amount);
					}
					break;
				}
			}
		}
	}
}

/*==========================================
 * 傾僀僥儉捛壛姰椆(ok墴偟)
 *------------------------------------------
 */
void trade_tradeok(struct map_session_data *sd)
{
	struct map_session_data *target_sd;

	if((target_sd = map_id2sd(sd->trade_partner)) != NULL){
		sd->deal_locked=1;
		clif_tradeitemok(sd,0,0);
		clif_tradedeal_lock(sd,0);
		clif_tradedeal_lock(target_sd,1);
	}
}

/*==========================================
 * 庢堷僉儍儞僙儖
 *------------------------------------------
 */
void trade_tradecancel(struct map_session_data *sd)
{
	struct map_session_data *target_sd;
	int trade_i;

	if((target_sd = map_id2sd(sd->trade_partner)) != NULL){
		for(trade_i=0; trade_i<10;trade_i++) { //give items back (only virtual)
			if(sd->deal_item_amount[trade_i] != 0) {
				clif_additem(sd,sd->deal_item_index[trade_i]-2,sd->deal_item_amount[trade_i],0);
				sd->deal_item_index[trade_i] =0;
				sd->deal_item_amount[trade_i]=0;
			}
			if(target_sd->deal_item_amount[trade_i] != 0) {
				clif_additem(target_sd,target_sd->deal_item_index[trade_i]-2,target_sd->deal_item_amount[trade_i],0);
				target_sd->deal_item_index[trade_i] =0;
				target_sd->deal_item_amount[trade_i]=0;
			}
		}
		if(sd->deal_zeny) {
			clif_updatestatus(sd,SP_ZENY);
			sd->deal_zeny=0;
		}
		if(target_sd->deal_zeny) {
			clif_updatestatus(target_sd,SP_ZENY);
			target_sd->deal_zeny=0;
		}
		sd->deal_locked =0;
		sd->trade_partner=0;
		target_sd->deal_locked=0;
		target_sd->trade_partner=0;
		clif_tradecancelled(sd);
		clif_tradecancelled(target_sd);
	}
}

/*==========================================
 * 庢堷嫋戻(trade墴偟)
 *------------------------------------------
 */
void trade_tradecommit(struct map_session_data *sd)
{
	struct map_session_data *target_sd;
	int trade_i;

	if((target_sd = map_id2sd(sd->trade_partner)) != NULL){
		if( (sd->deal_locked >=1) && (target_sd->deal_locked >=1) ){ // both have pressed 'ok'
			if(sd->deal_locked < 2) {sd->deal_locked=2;} // set locked to 2
			if(target_sd->deal_locked==2) { // the other one pressed 'trade' too
				for(trade_i=0; trade_i<10;trade_i++) {
					if(sd->deal_item_amount[trade_i] != 0) {
						int n=sd->deal_item_index[trade_i]-2;
						pc_additem(target_sd,&sd->status.inventory[n],sd->deal_item_amount[trade_i]);
						pc_delitem(sd,n,sd->deal_item_amount[trade_i],1);
						sd->deal_item_index[trade_i] =0;
						sd->deal_item_amount[trade_i]=0;
					}
					if(target_sd->deal_item_amount[trade_i] != 0) {
						int n=target_sd->deal_item_index[trade_i]-2;
						pc_additem(sd,&target_sd->status.inventory[n],target_sd->deal_item_amount[trade_i]);
						pc_delitem(target_sd,n,target_sd->deal_item_amount[trade_i],1);
						target_sd->deal_item_index[trade_i] =0;
						target_sd->deal_item_amount[trade_i]=0;
					}
				}
				if(sd->deal_zeny) {
					sd->status.zeny -= sd->deal_zeny;
					clif_updatestatus(sd,SP_ZENY);
					target_sd->status.zeny += sd->deal_zeny;
					clif_updatestatus(target_sd,SP_ZENY);
					sd->deal_zeny=0;
				}
				if(target_sd->deal_zeny) {
					target_sd->status.zeny -= target_sd->deal_zeny;
					clif_updatestatus(target_sd,SP_ZENY);
					sd->status.zeny += target_sd->deal_zeny;
					clif_updatestatus(sd,SP_ZENY);
					target_sd->deal_zeny=0;
				}
				sd->deal_locked =0;
				sd->trade_partner=0;
				target_sd->deal_locked=0;
				target_sd->trade_partner=0;
				clif_tradecompleted(sd,0);
				clif_tradecompleted(target_sd,0);
			}
		}
	}
}