/* @tier easy @module au @transform authorization-online */
/*
 * au_ol_0027.pgc - 승인 응답코드 매핑(상태→ISO 응답) (AU_OL_0027)  [tier=easy]
 *
 * 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_0027, ctx)
{
    char key[16];
    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AU_OL_0027] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16], h_status[2];
    EXEC SQL END DECLARE SECTION;

    const char *resp;

    tx_log(TX_LOG_INFO, "[AU_OL_0027] 승인 응답코드 매핑 진입");
    strncpy(h_key, key, 15); h_key[15] = '\0';

    EXEC SQL SELECT status INTO :h_status FROM au_ledger WHERE key = :h_key;
    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_NOMERCH);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    switch (h_status[0]) {
        case 'M':
        case 'S': resp = RESP_OK;      break;
        case 'U': resp = RESP_INVALID; break;
        case 'R': resp = "0002";       break;  /* 처리중 */
        default:  resp = RESP_SYSERR;  break;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_sets(ctx->out, "STATUS", h_status);
    tx_buf_sets(ctx->out, "RESPCODE", resp);
    tx_log(TX_LOG_INFO, "[AU_OL_0027] 매핑 status=%s -> resp=%s", h_status, resp);
    tx_return(ctx, TX_OK, ctx->out);
}
