/* @tier medium @module cm @transform common-online */
/*
 * cm_ol_0025.pgc - 파라미터 갱신 확인 서비스 (CM_OL_0025)  [tier=medium]
 *
 * 파라미터키(PKEY)로 운영 파라미터(cm_param)를 조회하여 최종수정시각
 * (upd_ts)을 요청 기준시각(SINCE, YYYYMMDDHH24MISS)과 비교, 기준시각 이후
 * 변경 여부(CHANGED=Y/N)와 현재값을 응답한다. 캐시 갱신 판단에 사용한다.
 * (ATMI void SVC(TPSVCINFO*) 대응)
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(CM_OL_0025, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_pkey[32];
    char h_pval[128];
    char h_updts[16];
    EXEC SQL END DECLARE SECTION;

    char pkey[32];
    char since[16];
    int  changed;

    tx_log(TX_LOG_INFO, "[CM_OL_0025] 파라미터 갱신 확인 서비스 진입");

    if (tx_buf_get(ctx->in, "PKEY", pkey, sizeof(pkey)) != TX_OK ||
        tx_buf_get(ctx->in, "SINCE", since, sizeof(since)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[CM_OL_0025] PKEY/SINCE 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    memset(&h_pkey, 0, sizeof(h_pkey));
    memset(&h_pval, 0, sizeof(h_pval));
    memset(&h_updts, 0, sizeof(h_updts));
    strncpy(h_pkey, pkey, sizeof(h_pkey) - 1);

    EXEC SQL SELECT param_val, TO_CHAR(upd_ts, 'YYYYMMDDHH24MISS')
          INTO :h_pval, :h_updts
          FROM cm_param
         WHERE param_key = :h_pkey;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[CM_OL_0025] 파라미터 없음 pkey=%s", pkey);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("CM_OL_0025 SELECT cm_param");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 최종수정시각 문자열 사전식 비교: 기준시각보다 크면 변경됨 */
    changed = (strncmp(h_updts, since, sizeof(h_updts)) > 0) ? 1 : 0;

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "PKEY", pkey);
    tx_buf_sets(ctx->out, "PVAL", h_pval);
    tx_buf_sets(ctx->out, "UPDTS", h_updts);
    tx_buf_sets(ctx->out, "CHANGED", changed ? "Y" : "N");
    tx_log(TX_LOG_INFO, "[CM_OL_0025] 확인완료 pkey=%s upd=%s since=%s changed=%s",
           pkey, h_updts, since, changed ? "Y" : "N");
    tx_return(ctx, TX_OK, ctx->out);
}