/* 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_0028.pgc"
/* @tier easy @module st @transform settlement-online */
/*
 * st_ol_0028.pgc - 프로모션 할인 정산 (ST_OL_0028)  [tier=easy]
 *
 * 프로모션 할인요율(만분율)을 매출에 적용하여 할인액을 산출하되,
 * 프로모션 예산 한도(cap)를 상한으로 실 청구금액을 계산한다. 프로모션
 * 예산 마스터(st_promo)에서 요율/잔여예산을 조회하고 소진분을 차감한다.
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.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 17 "app/online/st_ol_0028.pgc"



static long st_fee_round(long amount, long rate_bp)
{
    /* 요율(만분율, basis point) x 금액 -> 원단위 반올림 (BigDecimal HALF_UP 대응) */
    if (amount < 0)
        return -(((-amount) * rate_bp + 5000) / 10000);
    return (amount * rate_bp + 5000) / 10000;
}

TX_SERVICE(ST_OL_0028, ctx)
{
    /* exec sql begin declare section */
     
     
     
     
     
    
#line 31 "app/online/st_ol_0028.pgc"
 char h_promo [ 12 ] ;
 
#line 32 "app/online/st_ol_0028.pgc"
 long h_promo_bp ;
 
#line 33 "app/online/st_ol_0028.pgc"
 long h_remain_budget ;
 
#line 34 "app/online/st_ol_0028.pgc"
 long h_discount ;
 
#line 35 "app/online/st_ol_0028.pgc"
 long h_affected ;
/* exec sql end declare section */
#line 36 "app/online/st_ol_0028.pgc"


    char merch[16], promo[12];
    long amount = 0, promo_bp = 0, cap = 0, discount, charged;
    int  budget_applied = 0;

    tx_log(TX_LOG_INFO, "[ST_OL_0028] 프로모션 할인 정산 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK) {
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (tx_buf_get(ctx->in, "PROMO", promo, sizeof(promo)) != TX_OK)
        strncpy(promo, "DEFAULT", sizeof(promo) - 1);
    tx_buf_getlong(ctx->in, "AMOUNT", &amount);
    tx_buf_getlong(ctx->in, "PROMOBP", &promo_bp);
    tx_buf_getlong(ctx->in, "CAP", &cap);

    /* 프로모션 예산 조회 (요율/잔여예산) */
    strncpy(h_promo, promo, sizeof(h_promo) - 1);
    h_promo[sizeof(h_promo) - 1] = '\0';
    h_promo_bp = 0;
    h_remain_budget = 0;
    { ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "select promo_bp , remain_budget from st_promo where promo_code = $1 ", 
	ECPGt_char,(h_promo),(long)12,(long)1,(12)*sizeof(char), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT, 
	ECPGt_long,&(h_promo_bp),(long)1,(long)1,sizeof(long), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, 
	ECPGt_long,&(h_remain_budget),(long)1,(long)1,sizeof(long), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EORT);}
#line 62 "app/online/st_ol_0028.pgc"

    if (sqlca.sqlcode == TX_SQL_OK) {
        if (promo_bp <= 0) promo_bp = h_promo_bp;
        if (cap <= 0)      cap      = h_remain_budget;
        budget_applied = 1;
    } else if (sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT st_promo");
    }
    if (promo_bp <= 0) promo_bp = 500;   /* 5% 할인 */
    if (cap <= 0) cap = 10000;           /* 프로모션 상한 1만원 */

    if (!amount_is_valid(amount)) {
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    discount = st_fee_round(amount, promo_bp);
    if (discount > cap) discount = cap;
    charged  = amount - discount;

    /* 예산 소진 반영 */
    if (budget_applied && discount > 0) {
        h_discount = discount;
        if (tx_begin() != TX_OK)
            tx_log(TX_LOG_WARN, "[ST_OL_0028] tx_begin 경고");
        { ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "update st_promo set remain_budget = remain_budget - $1  , upd_ts = now ( ) where promo_code = $2  and remain_budget >= $3 ", 
	ECPGt_long,&(h_discount),(long)1,(long)1,sizeof(long), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, 
	ECPGt_char,(h_promo),(long)12,(long)1,(12)*sizeof(char), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, 
	ECPGt_long,&(h_discount),(long)1,(long)1,sizeof(long), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT, ECPGt_EORT);}
#line 92 "app/online/st_ol_0028.pgc"

        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("UPDATE st_promo 예산소진");
            tx_abort();
        } else {
            h_affected = sqlca.sqlerrd[2];
            tx_commit();
            if (h_affected == 0)
                tx_log(TX_LOG_WARN, "[ST_OL_0028] 예산부족 promo=%s", promo);
        }
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "MERCHID", merch);
    tx_buf_sets(ctx->out, "PROMO", promo);
    tx_buf_setlong(ctx->out, "DISCOUNT", discount);
    tx_buf_setlong(ctx->out, "CHARGED", charged);
    tx_log(TX_LOG_INFO, "[ST_OL_0028] 프로모션 %s amount=%ld 할인=%ld 청구=%ld",
           promo, amount, discount, charged);
    tx_return(ctx, TX_OK, ctx->out);
}
