/* @tier medium @module au @transform authorization-online */
/*
 * au_ol_0028.pgc - 일한도 잔여조회(당일 승인가능액) (AU_OL_0028)  [tier=medium]
 *
 * TxCore TX_SERVICE 엔트리. 요청 TXBUF 를 검증하고 임베디드 SQL / 표준
 * DBIO / tx_call 로 처리한 뒤 응답 TXBUF 를 구성한다.
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(AU_OL_0028, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_card[20], h_bdate[9];
    long h_used;
    EXEC SQL END DECLARE SECTION;

    char card[20], bdate[16];
    long daily_limit = 5000000L, remain;

    tx_log(TX_LOG_INFO, "[AU_OL_0028] 일한도 잔여조회 진입");
    if (tx_buf_get(ctx->in, "CARDNO", card, sizeof(card)) != TX_OK) {
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    date_today(bdate);
    if (tx_buf_get(ctx->in, "BIZDATE", bdate, sizeof(bdate)) == TX_OK) { /* override */ }

    strncpy(h_card, card, 19); h_card[19] = '\0';
    strncpy(h_bdate, bdate, 8); h_bdate[8] = '\0';

    EXEC SQL SELECT coalesce(sum(amount), 0) INTO :h_used
        FROM au_ledger
        WHERE card_no = :h_card AND biz_date = :h_bdate
          AND status IN ('R', 'M', 'S');
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("au_ol_0028 일한도");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    remain = (daily_limit > h_used) ? daily_limit - h_used : 0;

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "CARDNO", card);
    tx_buf_setlong(ctx->out, "DAILYLIMIT", daily_limit);
    tx_buf_setlong(ctx->out, "USED", h_used);
    tx_buf_setlong(ctx->out, "REMAIN", remain);
    tx_log(TX_LOG_INFO, "[AU_OL_0028] 일한도 card=%s remain=%ld", card, remain);
    tx_return(ctx, TX_OK, ctx->out);
}