/* @tier easy @module ac @transform acquire-online */
/*
 * ac_ol_0023.pgc - 매입 온라인 서비스 (AC_OL_0023)  [tier=easy]
 *
 * 매입 이체연계: 정산완료 매입 건의 순매입액(수수료 차감 합계)을 집계하여
 * 이체지시 레코드를 생성한다.
 */
#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_0023, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch_id[16];
    char h_biz_date[9];
    long h_net;
    char h_transfer_id[17];
    int  h_dup_cnt;
    EXEC SQL END DECLARE SECTION;

    char merch[16], bizdate[9];

    tx_log(TX_LOG_INFO, "[AC_OL_0023] 매입 이체연계 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK ||
        tx_buf_get(ctx->in, "BIZDATE", bizdate, sizeof(bizdate)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0023] 필수 필드(MERCHID/BIZDATE) 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    if (!date_is_valid(bizdate)) {
        tx_log(TX_LOG_WARN, "[AC_OL_0023] 영업일 형식 오류 date=%s", bizdate);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    strncpy(h_merch_id, merch, sizeof(h_merch_id) - 1);
    h_merch_id[sizeof(h_merch_id) - 1] = '\0';
    strncpy(h_biz_date, bizdate, sizeof(h_biz_date) - 1);
    h_biz_date[sizeof(h_biz_date) - 1] = '\0';

    EXEC SQL SELECT coalesce(sum(amount - fee), 0)
        INTO :h_net
        FROM ac_ledger
        WHERE merch_id = :h_merch_id
          AND biz_date = :h_biz_date
          AND status   = 'S';

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT sum net ac_ledger");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    if (h_net <= 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0023] 이체대상 없음 merch=%s date=%s",
               merch, bizdate);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    /* 중복 이체지시 방지: 동일 가맹점/영업일 이체(T) 이력 확인 */
    EXEC SQL SELECT count(*)
        INTO :h_dup_cnt
        FROM settle
        WHERE merch_id = :h_merch_id
          AND biz_date = :h_biz_date
          AND status   = 'T';

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT count settle dup");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (h_dup_cnt > 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0023] 이체지시 중복 merch=%s date=%s",
               merch, bizdate);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    /* 이체지시번호 채번: TR + 영업일 + 가맹점번호(6자리) */
    snprintf(h_transfer_id, sizeof(h_transfer_id), "TR%s%.6s", bizdate, merch);

    if (tx_begin() != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0023] 트랜잭션 시작 실패");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    EXEC SQL INSERT INTO settle
        (settle_no, merch_id, biz_date, settle_amt, status)
        VALUES
        (:h_transfer_id, :h_merch_id, :h_biz_date, :h_net, 'T');

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("INSERT settle transfer");
        tx_abort();
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_commit();

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "TRANSFERID", h_transfer_id);
    tx_buf_setlong(ctx->out, "NETAMOUNT", h_net);

    tx_log(TX_LOG_INFO, "[AC_OL_0023] 완료 transferid=%s 순매입액=%ld",
           h_transfer_id, h_net);
    tx_return(ctx, TX_OK, ctx->out);
}
