/* @tier medium @module au @transform authorization-online */
/*
 * au_ol_0032.pgc - 승인 대사(원장 vs 요청 금액 검증) (AU_OL_0032)  [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_0032, ctx)
{
    char key[16];
    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AU_OL_0032] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    long h_ledger;
    EXEC SQL END DECLARE SECTION;

    long claim = 0, diff;

    tx_log(TX_LOG_INFO, "[AU_OL_0032] 승인 대사 진입");
    tx_buf_getlong(ctx->in, "CLAIMAMT", &claim);
    strncpy(h_key, key, 15); h_key[15] = '\0';

    EXEC SQL SELECT amount INTO :h_ledger FROM au_ledger WHERE key = :h_key;
    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "MATCH", "N");
        tx_buf_sets(ctx->out, "RESULT", "원장없음");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    diff = h_ledger - claim;
    tx_buf_reset(ctx->out);
    tx_buf_setlong(ctx->out, "LEDGERAMT", h_ledger);
    tx_buf_setlong(ctx->out, "CLAIMAMT", claim);
    tx_buf_setlong(ctx->out, "DIFF", diff);
    tx_buf_sets(ctx->out, "MATCH", (diff == 0) ? "Y" : "N");
    tx_log(TX_LOG_INFO, "[AU_OL_0032] 대사 key=%s ledger=%ld claim=%ld diff=%ld",
           key, h_ledger, claim, diff);
    tx_return(ctx, (diff == 0) ? TX_OK : TX_FAIL, ctx->out);
}