/* @tier medium @module vl @transform validation-online */
/*
 * vl_ol_0018.pgc - 중복승인 검출 서비스 (VL_OL_0018)  [tier=medium]
 *
 * 동일 승인번호(approval_no) 가 원장(vl_ledger) 에 2건 이상 존재하는지
 * 집계하여 중복승인 여부를 판정한다. 중복이면 표준 에러코드(VL18xx) 를
 * 응답에 실어 반환한다.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(VL_OL_0018, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_appr[10];
    char h_bizdate[9];
    long h_dupcnt;
    EXEC SQL END DECLARE SECTION;

    char appr[10];
    char bizdate[16];

    tx_log(TX_LOG_INFO, "[VL_OL_0018] 중복승인 검출 서비스 진입");

    if (tx_buf_get(ctx->in, "APPRNO", appr, sizeof(appr)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0018] 승인번호(APPRNO) 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1800");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (tx_buf_get(ctx->in, "BIZDATE", bizdate, sizeof(bizdate)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0018] 영업일(BIZDATE) 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1801");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (!date_is_valid(bizdate)) {
        tx_log(TX_LOG_WARN, "[VL_OL_0018] 영업일 형식 오류 date=%s", bizdate);
        tx_buf_sets(ctx->out, "ERRCODE", "VL1802");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    strncpy(h_appr, appr, sizeof(h_appr) - 1);
    h_appr[sizeof(h_appr) - 1] = '\0';
    strncpy(h_bizdate, bizdate, sizeof(h_bizdate) - 1);
    h_bizdate[sizeof(h_bizdate) - 1] = '\0';

    h_dupcnt = 0;
    EXEC SQL SELECT COUNT(*)
          INTO :h_dupcnt
          FROM vl_ledger
         WHERE approval_no = :h_appr
           AND biz_date    = :h_bizdate;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT COUNT vl_ledger");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1809");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "APPRNO", appr);
    tx_buf_sets(ctx->out, "BIZDATE", bizdate);
    tx_buf_setlong(ctx->out, "DUPCNT", h_dupcnt);

    if (h_dupcnt >= 2) {
        tx_log(TX_LOG_WARN, "[VL_OL_0018] 중복승인 검출 appr=%s cnt=%ld",
               appr, h_dupcnt);
        tx_buf_sets(ctx->out, "RESULT", "DUPLICATE");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1803");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    tx_buf_sets(ctx->out, "RESULT", "UNIQUE");
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[VL_OL_0018] 중복없음 appr=%s cnt=%ld", appr, h_dupcnt);
    tx_return(ctx, TX_OK, ctx->out);
}