/* @tier medium @module cm @transform common-online */
/*
 * cm_ol_0030.pgc - 세션 유효성 만료 확인 서비스 (CM_OL_0030)  [tier=medium]
 *
 * 세션ID(SID)로 세션 마스터(cm_session)를 조회하여 만료시각(epoch)과 상태를
 * 얻고, 요청 현재시각(NOW, epoch 초)과 비교해 잔여 유효시간(초)을 계산한다.
 * 잔여시간 > 0 이고 상태가 활성('A')이면 유효로 응답한다.
 * (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_0030, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_sid[40];
    long h_exp;
    char h_state[2];
    EXEC SQL END DECLARE SECTION;

    char sid[40];
    long now;
    long remain;
    int  valid;

    tx_log(TX_LOG_INFO, "[CM_OL_0030] 세션 유효성 만료 확인 서비스 진입");

    if (tx_buf_get(ctx->in, "SID", sid, sizeof(sid)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[CM_OL_0030] SID 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    now = 0;
    if (tx_buf_getlong(ctx->in, "NOW", &now) != TX_OK || now <= 0) {
        tx_log(TX_LOG_ERROR, "[CM_OL_0030] NOW(현재시각) 누락/오류");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    memset(&h_sid, 0, sizeof(h_sid));
    memset(&h_state, 0, sizeof(h_state));
    strncpy(h_sid, sid, sizeof(h_sid) - 1);
    h_exp = 0;

    EXEC SQL SELECT expire_epoch, sess_state
          INTO :h_exp, :h_state
          FROM cm_session
         WHERE sess_id = :h_sid;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[CM_OL_0030] 세션 없음 sid=%s", sid);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("CM_OL_0030 SELECT cm_session");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    remain = h_exp - now;
    if (remain < 0)
        remain = 0;

    /* 활성 상태 + 잔여시간 존재 시에만 유효 */
    valid = (h_state[0] == 'A' && remain > 0) ? 1 : 0;

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "SID", sid);
    tx_buf_sets(ctx->out, "STATE", h_state);
    tx_buf_setlong(ctx->out, "REMAIN", remain);
    tx_buf_sets(ctx->out, "VALID", valid ? "Y" : "N");
    tx_log(TX_LOG_INFO, "[CM_OL_0030] 확인완료 sid=%s remain=%ld valid=%s",
           sid, remain, valid ? "Y" : "N");
    tx_return(ctx, valid ? TX_OK : TX_ENOENT, ctx->out);
}
