/* @tier easy @module ac @transform acquire-online */
/*
 * ac_ol_0016.pgc - 매입 온라인 서비스 (AC_OL_0016)  [tier=easy]
 *
 * 매입 원천징수: KEY 원장의 매입금액에 대해 가맹점별 원천징수율
 * (merchant.withhold_rate, bp)을 적용해 원천징수액과 지급순액(세후
 * 실지급액)을 계산해 반환한다. 원장은 변경하지 않는다(조회성 산출).
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(AC_OL_0016, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    long h_amount;
    char h_merch[16];
    long h_wrate;
    EXEC SQL END DECLARE SECTION;

    char key[16];
    long withhold;
    long net;

    tx_log(TX_LOG_INFO, "[AC_OL_0016] 매입 원천징수 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0016] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    strncpy(h_key, key, sizeof(h_key) - 1);
    h_key[sizeof(h_key) - 1] = '\0';

    EXEC SQL SELECT amount, merch_id
        INTO :h_amount, :h_merch
        FROM ac_ledger
        WHERE key = :h_key;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0016] 원장 없음 key=%s", key);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("AC_OL_0016 ac_ledger select");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    EXEC SQL SELECT withhold_rate
        INTO :h_wrate
        FROM merchant
        WHERE merch_id = :h_merch;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0016] 가맹점 없음 merch=%s", h_merch);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_NOMERCH);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("AC_OL_0016 merchant select");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    withhold = (h_amount * h_wrate) / 10000;
    net = h_amount - withhold;

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_setlong(ctx->out, "AMOUNT", h_amount);
    tx_buf_setlong(ctx->out, "WRATE", h_wrate);
    tx_buf_setlong(ctx->out, "WITHHOLD", withhold);
    tx_buf_setlong(ctx->out, "NETPAY", net);
    tx_log(TX_LOG_INFO, "[AC_OL_0016] 원천징수 산출완료 key=%s amount=%ld withhold=%ld net=%ld",
           key, h_amount, withhold, net);
    tx_return(ctx, TX_OK, ctx->out);
}
