/*
 * au_decline_bucket_batch.pgc - au 거절사유 버킷 집계 (커서 누적, 무기록, XA).
 *
 * Cursor-scans the day's declines grouped by reason and accumulates counts in C
 * (read-only work, no DB write) under ONE global XA transaction, printing the
 * total and distinct-reason bucket count. Usage: au_decline_bucket_batch [YYYY-MM-DD]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <atmi.h>
#include "au_dbio.h"

int main(int argc, char **argv)
{
    const char *bizdate = (argc > 1) ? argv[1] : "2026-07-19";
    long buckets = 0, total = 0;

    EXEC SQL BEGIN DECLARE SECTION;
    char h_bizdate[16], h_reason[128];
    long h_cnt;
    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 DECLARE dbc CURSOR FOR
        SELECT decline_reason, count(*) FROM au_authorization
        WHERE biz_date = :h_bizdate AND status = 'D' GROUP BY decline_reason;
    EXEC SQL OPEN dbc;
    if (sqlca.sqlcode < 0) { fprintf(stderr, "OPEN FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); tpabort(0); return 1; }

    for (;;) {
        EXEC SQL FETCH dbc INTO :h_reason, :h_cnt;
        if (sqlca.sqlcode == 100) break;
        if (sqlca.sqlcode < 0) { fprintf(stderr, "FETCH FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); EXEC SQL CLOSE dbc; tpabort(0); return 1; }
        total = total + h_cnt;
        buckets++;
    }
    EXEC SQL CLOSE dbc;

    if (tpcommit(0) < 0) { fprintf(stderr, "tpcommit FAIL: %s\n", tpstrerror(tperrno)); tpabort(0); return 1; }
    printf(">>> au_decline_bucket_batch COMMIT: bizdate=%s reasons=%ld total_declines=%ld\n", bizdate, buckets, total);

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