/* @tier medium @module ac @transform acquire-online */
/*
 * ac_ol_0011.pgc - 매입 온라인 서비스 (AC_OL_0011)  [tier=medium]
 *
 * 매입 중복검사: 동일 가맹점/카드/금액/영업일 조합이 이미 유효 상태로
 * 존재하는지 검사한다. 중복이면 기존 원장키를 조회해 함께 반환하고
 * TX_FAIL 로 경보한다.
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(AC_OL_0011, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch[16];
    char h_card[20];
    long h_amount;
    char h_bizdate[9];
    int  h_cnt;
    char h_exist_key[16];
    EXEC SQL END DECLARE SECTION;

    char merch[16];
    char card[20];
    char bizdate[9];
    long amount = 0;
    long dup;
    char exist_key[16];
    int  found_exist;

    tx_log(TX_LOG_INFO, "[AC_OL_0011] 매입 중복검사 서비스 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK ||
        tx_buf_get(ctx->in, "CARDNO", card, sizeof(card)) != TX_OK ||
        tx_buf_get(ctx->in, "BIZDATE", bizdate, sizeof(bizdate)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0011] 필수 필드 누락(MERCHID/CARDNO/BIZDATE)");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    tx_buf_getlong(ctx->in, "AMOUNT", &amount);

    if (!amount_is_valid(amount)) {
        tx_log(TX_LOG_WARN, "[AC_OL_0011] 금액 범위 오류 amount=%ld", amount);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (!date_is_valid(bizdate)) {
        tx_log(TX_LOG_WARN, "[AC_OL_0011] 영업일 오류 date=%s", bizdate);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    strncpy(h_merch, merch, sizeof(h_merch) - 1);
    h_merch[sizeof(h_merch) - 1] = '\0';
    strncpy(h_card, card, sizeof(h_card) - 1);
    h_card[sizeof(h_card) - 1] = '\0';
    strncpy(h_bizdate, bizdate, sizeof(h_bizdate) - 1);
    h_bizdate[sizeof(h_bizdate) - 1] = '\0';
    h_amount = amount;

    EXEC SQL SELECT count(*)
        INTO :h_cnt
        FROM ac_ledger
        WHERE merch_id = :h_merch
          AND card_no  = :h_card
          AND amount   = :h_amount
          AND biz_date = :h_bizdate
          AND status  <> 'U';

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("AC_OL_0011 dup count select");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    dup = (long)h_cnt;

    tx_buf_reset(ctx->out);
    if (dup > 0) {
        /* 중복건 중 하나의 기존 원장키를 참고용으로 조회한다 */
        found_exist = 0;
        exist_key[0] = '\0';

        EXEC SQL SELECT key
            INTO :h_exist_key
            FROM ac_ledger
            WHERE merch_id = :h_merch
              AND card_no  = :h_card
              AND amount   = :h_amount
              AND biz_date = :h_bizdate
              AND status  <> 'U'
            LIMIT 1;

        if (sqlca.sqlcode == TX_SQL_OK) {
            found_exist = 1;
            strncpy(exist_key, h_exist_key, sizeof(exist_key) - 1);
            exist_key[sizeof(exist_key) - 1] = '\0';
        } else if (sqlca.sqlcode != TX_SQL_NOTFOUND) {
            TX_DBIO_LOG_ERR("AC_OL_0011 exist key select");
        }

        tx_log(TX_LOG_WARN, "[AC_OL_0011] 중복매입 감지 merch=%s card=%s amount=%ld date=%s cnt=%ld",
               merch, card, amount, bizdate, dup);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_buf_setlong(ctx->out, "DUP", 1);
        tx_buf_setlong(ctx->out, "DUPCNT", dup);
        if (found_exist)
            tx_buf_sets(ctx->out, "EXISTKEY", exist_key);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_setlong(ctx->out, "DUP", 0);
    tx_buf_setlong(ctx->out, "DUPCNT", 0);
    tx_log(TX_LOG_INFO, "[AC_OL_0011] 중복없음 merch=%s card=%s amount=%ld date=%s",
           merch, card, amount, bizdate);
    tx_return(ctx, TX_OK, ctx->out);
}