Zabbix api history.get awk

BEGIN {
        FS = ":";
        OUTDIR="/work/zabbix/"
}
/^ITEM-ID/ {itemid = gensub(/\s/,"","g",$2);rmfile=OUTDIR itemid;system("test -e " rmfile " && rm " rmfile)}
/"value"/ {val = gensub(/\s\"(.+)\"\,/,"\\1","g",$2)}
/"clock"/ {clk = gensub(/\s\"(.+)\"/,"\\1","g",$2)
         clk = strftime("%Y/%m/%d %H:%M:%S",clk)
         printf "%s\n", clk "," val >> OUTDIR itemid
         }