/* @tier hard @module au @transform authorization-online */
/*
 * au_ol_0014.pgc - 승인 한도초과 처리(누적합 판정) (AU_OL_0014)  [tier=hard]
 *
 * 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_0014, ctx)
{
    char key[16];
    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AU_OL_0014] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch[16], h_bdate[9];
    long h_used, h_req;
    EXEC SQL END DECLARE SECTION;

    char merch[16], bdate[16];
    long req = 0, limit_amt = 100000000L;

    tx_log(TX_LOG_INFO, "[AU_OL_0014] 승인 한도초과 처리 진입");
    if (tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK) {
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (tx_buf_get(ctx->in, "BIZDATE", bdate, sizeof(bdate)) != TX_OK)
        date_today(bdate);
    tx_buf_getlong(ctx->in, "AMOUNT", &req);

    strncpy(h_merch, merch, 15); h_merch[15] = '\0';
    strncpy(h_bdate, bdate, 8);  h_bdate[8] = '\0';
    h_req = req;

    EXEC SQL SELECT coalesce(sum(amount), 0) INTO :h_used
        FROM au_ledger
        WHERE merch_id = :h_merch AND biz_date = :h_bdate AND status = 'M';
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("au_ol_0014 누적조회");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_buf_reset(ctx->out);
    if (h_used + h_req > limit_amt) {
        tx_log(TX_LOG_WARN, "[AU_OL_0014] 한도초과 used=%ld req=%ld limit=%ld",
               h_used, h_req, limit_amt);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_buf_sets(ctx->out, "OVERLIMIT", "Y");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "OVERLIMIT", "N");
    tx_buf_setlong(ctx->out, "AVAIL", limit_amt - h_used - h_req);
    tx_log(TX_LOG_INFO, "[AU_OL_0014] 한도내 승인가능 잔여=%ld",
           limit_amt - h_used - h_req);
    tx_return(ctx, TX_OK, ctx->out);
}
