/* @tier easy @module st @transform settlement-online */
/*
 * st_ol_0032.pgc - 정산 예치금(보증금) 산정 (ST_OL_0032)  [tier=easy]
 *
 * 정산순액의 일부를 지급유보(리스크 예치금)로 적립한다. 예치요율
 * (만분율)을 적용하여 예치금과 실지급액을 산출한다.
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "acq_util.h"
#include "st_core.h"

EXEC SQL INCLUDE sqlca;


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_0032, ctx)
{
    char merch[16];
    long net = 0, reserve_bp = 0, reserve, payout;

    tx_log(TX_LOG_INFO, "[ST_OL_0032] 정산 예치금 산정 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, "NET", &net);
    tx_buf_getlong(ctx->in, "RESERVEBP", &reserve_bp);
    if (reserve_bp < 0 || reserve_bp > 10000) reserve_bp = 500;  /* 5% 예치 */

    if (net <= 0) {
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    reserve = st_fee_round(net, reserve_bp);
    payout  = net - reserve;

    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, "NET", net);
    tx_buf_setlong(ctx->out, "RESERVE", reserve);
    tx_buf_setlong(ctx->out, "PAYOUT", payout);
    tx_log(TX_LOG_INFO, "[ST_OL_0032] 예치금 net=%ld reserve=%ld payout=%ld",
           net, reserve, payout);
    tx_return(ctx, TX_OK, ctx->out);
}