/*
 * mg_rollup_batch.pgc - mg 채널별 통계 조인 롤업 적재 배치 (XA).
 *
 * ATMI client: tpinit/tpopen open the ECPG XA RM, tpbegin starts ONE global
 * transaction; mg_msg_log 를 mg_channel 과 조인하여 채널별 금액합을 GROUP BY
 * 로 집계한 뒤 mg_stat 에 INSERT ... SELECT 로 적재; then tpcommit.
 * Usage: mg_rollup_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_rows = 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 INSERT INTO mg_stat (channel, biz_date, in_cnt, out_cnt, err_cnt, amount_sum)
        SELECT m.channel, m.biz_date, 0, 0, 0, coalesce(sum(m.amount),0)
        FROM mg_msg_log m JOIN mg_channel c ON m.channel = c.channel
        WHERE m.biz_date = :h_bizdate
        GROUP BY m.channel, m.biz_date;
    if (sqlca.sqlcode < 0) { fprintf(stderr, "mg_rollup_batch FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); tpabort(0); return 1; }
    h_rows = sqlca.sqlerrd[2];

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

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