/*
 * mg_join_batch.pgc - mg 큐 x 채널 조인 재시도 합계 배치 (XA).
 *
 * ATMI client: tpinit/tpopen open the ECPG XA RM, tpbegin starts ONE global
 * transaction; mg_queue 를 mg_channel 과 조인하여 UP 채널에 걸린 큐의 재시도
 * 횟수 합계를 단일 집계로 산출; then tpcommit drives XA 2PC.
 * Usage: mg_join_batch [YYYY-MM-DD]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <atmi.h>
#include "mg_dbio.h"

int main(int argc, char **argv)
{
    const char *bizdate = (argc > 1) ? argv[1] : "2026-07-19";
    EXEC SQL BEGIN DECLARE SECTION;
    char h_bizdate[16];
    long h_retry = 0;
    EXEC SQL END DECLARE SECTION;

    strncpy(h_bizdate, bizdate, sizeof(h_bizdate)-1); h_bizdate[sizeof(h_bizdate)-1] = 0;

    if (tpinit(NULL) < 0) { fprintf(stderr, "tpinit FAIL: %s\n", tpstrerror(tperrno)); return 1; }
    if (tpopen() < 0)     { fprintf(stderr, "tpopen FAIL: %s\n", tpstrerror(tperrno)); return 1; }
    if (tpbegin(60, 0) < 0) { fprintf(stderr, "tpbegin FAIL: %s\n", tpstrerror(tperrno)); return 1; }

    EXEC SQL SELECT coalesce(sum(q.retry_cnt),0) INTO :h_retry
        FROM mg_queue q JOIN mg_channel c ON q.channel = c.channel
        WHERE q.biz_date = :h_bizdate AND c.status = 'UP';
    if (sqlca.sqlcode < 0) { fprintf(stderr, "mg_join_batch FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); tpabort(0); return 1; }

    if (tpcommit(0) < 0) { fprintf(stderr, "tpcommit FAIL: %s\n", tpstrerror(tperrno)); tpabort(0); return 1; }
    printf(">>> mg_join_batch COMMIT: bizdate=%s retry_sum=%ld\n", bizdate, h_retry);

    tpclose(); tpterm();
    return 0;
}
