/*
 * mg_confirm_batch.pgc - mg 송신완료 큐 확인 전이 배치 (XA).
 *
 * ATMI client: tpinit/tpopen open the ECPG XA RM, tpbegin starts ONE global
 * transaction; 송신(S) 큐 존재 여부를 EXISTS(CASE) 로 판정하고, 존재할 때만
 * 해당 큐를 확인완료(D) 로 UPDATE; then tpcommit drives XA 2PC.
 * Usage: mg_confirm_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_flag = 0, h_upd = 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 CASE WHEN EXISTS
        (SELECT 1 FROM mg_queue WHERE biz_date = :h_bizdate AND status = 'S')
        THEN 1 ELSE 0 END INTO :h_flag;
    if (sqlca.sqlcode < 0) { tpabort(0); return 1; }
    if (h_flag > 0) {
        EXEC SQL UPDATE mg_queue SET status = 'D', updated_at = now()
            WHERE biz_date = :h_bizdate AND status = 'S';
        if (sqlca.sqlcode < 0) { fprintf(stderr, "mg_confirm_batch FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); tpabort(0); return 1; }
        h_upd = sqlca.sqlerrd[2];
    }

    if (tpcommit(0) < 0) { fprintf(stderr, "tpcommit FAIL: %s\n", tpstrerror(tperrno)); tpabort(0); return 1; }
    printf(">>> mg_confirm_batch COMMIT: bizdate=%s has_sent=%ld confirmed=%ld\n", bizdate, h_flag, h_upd);

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