/* @tier easy @module ac @transform acquire-online */
/*
 * ac_ol_0003.pgc - DDC 매입 서비스 (직불카드 즉시매입, AC_OL_0003)  [tier=easy]
 *
 * 직불카드(DDC)는 승인과 동시에 매입이 확정되므로 접수 단계 없이 바로
 * 처리완료(status='M') 상태로 ac_ledger 에 적재한다. 가맹점 활성 여부와
 * 접수키 중복을 사전 검증한다.
 */
#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_0003, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    char h_merch_id[16];
    char h_card_no[20];
    long h_amount;
    char h_biz_date[9];
    char h_status[2];
    long h_fee;
    char h_acq_type[4];
    long h_merch_active;
    long h_dup;
    EXEC SQL END DECLARE SECTION;

    char key[16], merch[16], card[20], bizdate[16];
    long amount = 0;

    tx_log(TX_LOG_INFO, "[AC_OL_0003] DDC 매입 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK ||
        tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK ||
        tx_buf_get(ctx->in, "CARDNO", card, sizeof(card)) != TX_OK ||
        tx_buf_get(ctx->in, "BIZDATE", bizdate, sizeof(bizdate)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0003] 필수 필드 누락");
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    tx_buf_getlong(ctx->in, "AMOUNT", &amount);

    if (!amount_is_valid(amount)) {
        tx_log(TX_LOG_WARN, "[AC_OL_0003] 금액 범위 오류 amount=%ld", amount);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (!date_is_valid(bizdate)) {
        tx_log(TX_LOG_WARN, "[AC_OL_0003] 영업일 오류 date=%s", bizdate);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

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

    EXEC SQL
        SELECT count(*) INTO :h_merch_active
          FROM merchant
         WHERE merch_id = :h_merch_id
           AND status   = 'A';

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT merchant.status(DDC)");
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (h_merch_active <= 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0003] 미등록/비활성 가맹점 merch=%s", merch);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_NOMERCH);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    EXEC SQL
        SELECT count(*) INTO :h_dup
          FROM ac_ledger
         WHERE key = :h_key;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT dup ac_ledger(DDC)");
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (h_dup > 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0003] 중복 처리키 key=%s", key);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    strncpy(h_card_no, card, sizeof(h_card_no) - 1);
    h_card_no[sizeof(h_card_no) - 1] = '\0';
    strncpy(h_biz_date, bizdate, sizeof(h_biz_date) - 1);
    h_biz_date[sizeof(h_biz_date) - 1] = '\0';
    strncpy(h_status, AC_ST_DONE, sizeof(h_status));
    strncpy(h_acq_type, "DDC", sizeof(h_acq_type) - 1);
    h_acq_type[sizeof(h_acq_type) - 1] = '\0';
    h_amount = amount;
    h_fee    = amount * 20 / 10000;   /* 직불 수수료 0.20% */

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[AC_OL_0003] tx_begin 경고");

    EXEC SQL
        INSERT INTO ac_ledger
            (key, merch_id, card_no, amount, biz_date, status, fee, acq_type)
        VALUES
            (:h_key, :h_merch_id, :h_card_no, :h_amount, :h_biz_date,
             :h_status, :h_fee, :h_acq_type);

    if (sqlca.sqlcode != TX_SQL_OK || sqlca.sqlerrd[2] != 1) {
        TX_DBIO_LOG_ERR("INSERT ac_ledger(DDC)");
        tx_abort();
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        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, "KEY", key);
    tx_buf_sets(ctx->out, "STATUS", h_status);
    tx_buf_setlong(ctx->out, "FEE", h_fee);
    tx_log(TX_LOG_INFO, "[AC_OL_0003] DDC 즉시매입 완료 key=%s amount=%ld fee=%ld",
           key, amount, h_fee);
    tx_return(ctx, TX_OK, ctx->out);
}