-|script|@zeny|32767
{
    callfunc "argv_splitter";
    set .@n$, if_then_else(@argv$[1] != "", "char", "") + "zeny";
    if (GM < CMD_ZENY && GM < G_SYSOP) goto L_GM; // check if you can use it on self
    set .@target_id, BL_ID;
    if (@argv$[1] != "") set .@target_id, getcharid(3, @argv$[1]);
    if (@argv$[1] != "" && !(isloggedin(.@target_id))) goto L_Failed; // do NOT fallback to self
    if (@argv$[1] != "" && GM < CMD_CHARZENY && GM < G_SYSOP) goto L_GM; // when target is not self, use charzeny permission
    if (@argv$[0] == "--")  goto L_Remove;
    if (@argv$[0] == "---") goto L_RemoveAll;
    if (@argv$[0] == "++")  goto L_Max;
    if (@argv$[0] == "+++") goto L_MaxAll;
    set .@delta, @argv[0]; // ± zeny
    set .@zeny, get(Zeny, .@target_id); // get the number of zeny in char
    set .@bank, get(#BankAccount, .@target_id); // get number of zeny in (world) account
    set .@new_zeny, .@zeny + .@delta; // new balance in char
    if (.@new_zeny < 0) goto L_MaybeRemoveBank; // zeny would be below 0 so check if we can take from bank
    if (.@new_zeny > .max_zeny) goto L_MaybeAddBank; // zeny would be over the limit so check if we can store in bank
    set Zeny, (.@zeny + .@delta), .@target_id;
    goto L_Success;

L_Remove:
    set Zeny, 0, .@target_id;
    goto L_Success;

L_RemoveAll:
    set Zeny, 0, .@target_id;
    set #BankAccount, 0, .@target_id;
    goto L_Success;

L_Max:
    set Zeny, .max_zeny, .@target_id;
    goto L_Success;

L_MaxAll:
    set Zeny, .max_zeny, .@target_id;
    set #BankAccount, .max_int, .@target_id;
    goto L_Success;

L_MaybeAddBank:
    set .@new_bank, (.@bank + (.@new_zeny - .max_zeny));
    if (.@new_bank > .max_int || .@new_bank < 0) goto L_OutOfBounds;
    set Zeny, .max_zeny, .@target_id;
    set #BankAccount, .@new_bank, .@target_id;
    goto L_Success;

L_MaybeRemoveBank:
    if ((.@bank + .@new_zeny) < 0) goto L_OutOfBounds;
    set Zeny, 0, .@target_id;
    set #BankAccount, (.@bank + .@new_zeny), .@target_id;
    goto L_Success;

L_OutOfBounds:
    // XXX: maybe we could also take from other chars from the same accout?
    message strcharinfo(0), .@n$+" : Impossible to proceed! This would cause the player to have less than 0 zeny or more than " + .max_int + ".";
    end;

L_Failed:
    // XXX: should we allow GMs to change zeny of users that are not logged in?
    message strcharinfo(0), .@n$+" : Impossible to attach to the target player. Did you try putting the name in \"quotation marks\"?";
    end;

L_Success:
    gmlog "@zeny " + @args$;
    message strcharinfo(0), .@n$+" : The operation succeeded.";
    end;

L_GM:
    message strcharinfo(0), .@n$+" : GM command is level "+ if_then_else(@argv$[1] != "", CMD_CHARZENY, CMD_ZENY) +", but you are level " + GM;
    end;

OnInit:
    set .max_zeny, 1000000000; // hardcoded in tmwa
    set .max_int,  2147483647; // max int32 value
    registercmd chr(ATCMD_SYMBOL) + "zeny", strnpcinfo(0);
    registercmd chr(ATCMD_SYMBOL) + "charzeny", strnpcinfo(0);
    end;
}