/* @tier hard @module au @transform authorization-batch */
/*
 * au_bt_0005.pgc - 이상거래 탐지 배치 (카드별 임계 초과 플래그)  [tier=hard]
 *
 * 배치 main 엔트리 포함.  실행:  au_bt_0005 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.h"
#include "acq_util.h"
#include "au_core.h"

EXEC SQL INCLUDE sqlca;

static int run_au_bt_0005(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9], h_card[20];
    int  h_cnt;
    long h_sum;
    EXEC SQL END DECLARE SECTION;

    long cards = 0, flagged = 0;

    strncpy(h_biz_date, biz_date, 8); h_biz_date[8] = '\0';

    EXEC SQL DECLARE cur_fraud CURSOR FOR
        SELECT card_no, count(*), sum(amount)
        FROM au_ledger
        WHERE biz_date = :h_biz_date
        GROUP BY card_no
        HAVING count(*) >= 10 OR sum(amount) >= 30000000
        ORDER BY sum(amount) DESC;
    EXEC SQL OPEN cur_fraud;
    if (sqlca.sqlcode != TX_SQL_OK) { TX_DBIO_LOG_ERR("OPEN cur_fraud"); return TX_EDB; }

    printf("===== 이상거래 탐지 [au_bt_0005] date=%s =====\n", biz_date);
    for (;;) {
        EXEC SQL FETCH cur_fraud INTO :h_card, :h_cnt, :h_sum;
        if (sqlca.sqlcode == TX_SQL_NOTFOUND) break;
        if (sqlca.sqlcode != TX_SQL_OK) break;
        cards++;
        flagged++;
        printf("  [의심] card=%s 건수=%d 합계=%ld\n", h_card, h_cnt, h_sum);
        tx_log(TX_LOG_WARN, "[au_bt_0005] 이상거래 card=%s cnt=%d sum=%ld", h_card, h_cnt, h_sum);
    }
    EXEC SQL CLOSE cur_fraud;

    printf("  탐지 카드수 : %ld\n", flagged);
    (void)cards;
    return TX_OK;
}

int main(int argc, char **argv)
{
    const char *biz_date;
    const char *target;
    int rc;

    tx_set_loglevel(TX_LOG_INFO);
    if (argc < 2) {
        fprintf(stderr, "사용법: %s <YYYYMMDD> [db@host]\n", argv[0]);
        return 2;
    }
    biz_date = argv[1];
    target   = (argc >= 3) ? argv[2] : NULL;
    if (!date_is_valid(biz_date)) {
        fprintf(stderr, "오류: 유효하지 않은 영업일 '%s'\n", biz_date);
        return 2;
    }
    tx_log(TX_LOG_INFO, "[au_bt_0005] 배치 시작 date=%s", biz_date);
    rc = au_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[au_bt_0005] DB 접속 실패 rc=%d", rc);
        return 1;
    }
    rc = run_au_bt_0005(biz_date);
    au_dbio_disconnect();
    tx_log(TX_LOG_INFO, "[au_bt_0005] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}