/* 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/st_ol_0018.pgc"
/* @tier medium @module st @transform settlement-online */
/*
 * st_ol_0018.pgc - 정산 상계(offset) 처리 (ST_OL_0018)  [tier=medium]
 *
 * 가맹점 채권(수취)과 채무(지급)를 상계하여 잔액과 방향을 산출한다.
 * 상계 후 잔여채권/잔여채무를 구분해 반환한다.
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "acq_util.h"
#include "st_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 15 "app/online/st_ol_0018.pgc"



TX_SERVICE(ST_OL_0018, ctx)
{
    char merch[16];
    long receivable = 0, payable = 0, offset, residual;
    const char *dir;

    tx_log(TX_LOG_INFO, "[ST_OL_0018] 정산 상계 처리 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK) {
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    tx_buf_getlong(ctx->in, "RECEIVABLE", &receivable);
    tx_buf_getlong(ctx->in, "PAYABLE",    &payable);
    if (receivable < 0 || payable < 0) {
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    offset   = (receivable < payable) ? receivable : payable;
    residual = receivable - payable;
    dir      = (residual > 0) ? "RECV" : (residual < 0 ? "PAY" : "EVEN");

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "MERCHID", merch);
    tx_buf_setlong(ctx->out, "OFFSET", offset);
    tx_buf_setlong(ctx->out, "RESIDUAL", residual);
    tx_buf_sets(ctx->out, "DIR", dir);
    tx_log(TX_LOG_INFO, "[ST_OL_0018] 상계 recv=%ld pay=%ld offset=%ld 잔액=%ld(%s)",
           receivable, payable, offset, residual, dir);
    tx_return(ctx, TX_OK, ctx->out);
}