/*
 * ac_grade_batch.pgc - ac 가맹점등급별 매입 집계 (단건 집계 배치, XA).
 * 가맹점 MDR(bps)을 프리미엄(<=20)/일반/기본 등급으로 나눠 매출을 집계한다.
 *
 * ATMI client: tpinit/tpopen open the ECPG XA RM, tpbegin starts ONE global
 * transaction, aggregate(s) run on the biz_date, then tpcommit drives XA 2PC.
 * Usage: ac_grade_batch [YYYY-MM-DD]
 */
EXEC SQL INCLUDE ac_grade_batch;

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_prem, h_std, h_basic;
    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(p.amount) FILTER (WHERE m.mdr_bps <= 20),0),
                    coalesce(sum(p.amount) FILTER (WHERE m.mdr_bps BETWEEN 21 AND 28),0),
                    coalesce(sum(p.amount) FILTER (WHERE m.mdr_bps > 28),0)
        INTO :h_prem, :h_std, :h_basic FROM purchase p
        JOIN merchant m ON m.merchant_id = p.merchant_id WHERE p.biz_date = :h_bizdate;
    if (sqlca.sqlcode < 0) { fprintf(stderr, "ac_grade_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(">>> ac_grade_batch COMMIT: bizdate=%s premium=%ld std=%ld basic=%ld\n", bizdate, h_prem, h_std, h_basic);

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