/* Processed by ecpg (15.18 (Debian 15.18-0+deb12u1)) */
/* These include files are added by the preprocessor */
#include <ecpglib.h>
#include <ecpgerrno.h>
#include <sqlca.h>
/* End of automatic include section */

#line 1 "app/online/vl_ol_0019.pgc"
/* @tier easy @module vl @transform validation-online */
/*
 * vl_ol_0019.pgc - 이상금액 탐지 서비스 (VL_OL_0019)  [tier=easy]
 *
 * 가맹점의 과거 평균거래금액(AVG vl_ledger) 을 산출하여, 입력금액이
 * 임계배수(기본 5배) 를 초과하면 이상거래로 판정한다.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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


#line 1 "/usr/include/postgresql/sqlca.h"
#ifndef POSTGRES_SQLCA_H
#define POSTGRES_SQLCA_H

#ifndef PGDLLIMPORT
#if  defined(WIN32) || defined(__CYGWIN__)
#define PGDLLIMPORT __declspec (dllimport)
#else
#define PGDLLIMPORT
#endif							/* __CYGWIN__ */
#endif							/* PGDLLIMPORT */

#define SQLERRMC_LEN	150

#ifdef __cplusplus
extern "C"
{
#endif

struct sqlca_t
{
	char		sqlcaid[8];
	long		sqlabc;
	long		sqlcode;
	struct
	{
		int			sqlerrml;
		char		sqlerrmc[SQLERRMC_LEN];
	}			sqlerrm;
	char		sqlerrp[8];
	long		sqlerrd[6];
	/* Element 0: empty						*/
	/* 1: OID of processed tuple if applicable			*/
	/* 2: number of rows processed				*/
	/* after an INSERT, UPDATE or				*/
	/* DELETE statement					*/
	/* 3: empty						*/
	/* 4: empty						*/
	/* 5: empty						*/
	char		sqlwarn[8];
	/* Element 0: set to 'W' if at least one other is 'W'	*/
	/* 1: if 'W' at least one character string		*/
	/* value was truncated when it was			*/
	/* stored into a host variable.             */

	/*
	 * 2: if 'W' a (hopefully) non-fatal notice occurred
	 */	/* 3: empty */
	/* 4: empty						*/
	/* 5: empty						*/
	/* 6: empty						*/
	/* 7: empty						*/

	char		sqlstate[5];
};

struct sqlca_t *ECPGget_sqlca(void);

#ifndef POSTGRES_ECPG_INTERNAL
#define sqlca (*ECPGget_sqlca())
#endif

#ifdef __cplusplus
}
#endif

#endif

#line 17 "app/online/vl_ol_0019.pgc"


#define VL0019_DEFAULT_MULT  5

TX_SERVICE(VL_OL_0019, ctx)
{
    /* exec sql begin declare section */
     
     
     
    
#line 24 "app/online/vl_ol_0019.pgc"
 char h_merch [ 16 ] ;
 
#line 25 "app/online/vl_ol_0019.pgc"
 long h_avg_amt ;
 
#line 26 "app/online/vl_ol_0019.pgc"
 long h_sample ;
/* exec sql end declare section */
#line 27 "app/online/vl_ol_0019.pgc"


    char merch[16];
    long amount = 0;
    long mult = 0;
    long threshold;

    tx_log(TX_LOG_INFO, "[VL_OL_0019] 이상금액 탐지 서비스 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0019] 가맹점ID(MERCHID) 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1900");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (tx_buf_getlong(ctx->in, "AMOUNT", &amount) != TX_OK ||
        !amount_is_valid(amount)) {
        tx_log(TX_LOG_WARN, "[VL_OL_0019] 금액 범위 오류 amount=%ld", amount);
        tx_buf_sets(ctx->out, "ERRCODE", "VL1901");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    /* 임계배수: 요청에 오면 사용, 없거나 비정상이면 기본값 */
    if (tx_buf_getlong(ctx->in, "MULT", &mult) != TX_OK || mult <= 0) {
        mult = VL0019_DEFAULT_MULT;
    }

    strncpy(h_merch, merch, sizeof(h_merch) - 1);
    h_merch[sizeof(h_merch) - 1] = '\0';

    h_avg_amt = 0;
    h_sample  = 0;
    { ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "select coalesce ( AVG ( amount ) , 0 ) , count ( * ) from vl_ledger where merch_id = $1  and status in ( 'M' , 'S' )", 
	ECPGt_char,(h_merch),(long)16,(long)1,(16)*sizeof(char), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT, 
	ECPGt_long,&(h_avg_amt),(long)1,(long)1,sizeof(long), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, 
	ECPGt_long,&(h_sample),(long)1,(long)1,sizeof(long), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EORT);}
#line 64 "app/online/vl_ol_0019.pgc"


    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT AVG vl_ledger");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1909");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "MERCHID", merch);
    tx_buf_setlong(ctx->out, "AMOUNT", amount);
    tx_buf_setlong(ctx->out, "AVGAMT", h_avg_amt);
    tx_buf_setlong(ctx->out, "SAMPLE", h_sample);
    tx_buf_setlong(ctx->out, "MULT", mult);

    /* 표본이 없으면 판단 보류(정상 처리) */
    if (h_sample == 0 || h_avg_amt <= 0) {
        tx_log(TX_LOG_INFO, "[VL_OL_0019] 표본부족 merch=%s 판단보류", merch);
        tx_buf_sets(ctx->out, "RESULT", "NODATA");
        tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    threshold = h_avg_amt * mult;
    tx_buf_setlong(ctx->out, "THRESHOLD", threshold);

    if (amount > threshold) {
        tx_log(TX_LOG_WARN, "[VL_OL_0019] 이상금액 탐지 merch=%s amt=%ld thr=%ld",
               merch, amount, threshold);
        tx_buf_sets(ctx->out, "RESULT", "ANOMALY");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1902");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    tx_buf_sets(ctx->out, "RESULT", "NORMAL");
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[VL_OL_0019] 정상 merch=%s amt=%ld avg=%ld",
           merch, amount, h_avg_amt);
    tx_return(ctx, TX_OK, ctx->out);
}
