/* @tier easy @module mm @transform master-online */
/*
 * mm_ol_0003.pgc - 가맹점 정보수정 서비스 (MM_OL_0003)  [tier=easy]
 *
 * 기존 가맹점의 상호(merch_nm)/업종(biz_type)을 변경한다. 존재확인 후
 * mm_merchant 를 UPDATE 하고 변경이력(mm_merchant_hist) 에 'U' 이벤트를
 * 남긴다. (CRUD + 이력)
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(MM_OL_0003, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch_id[16];
    char h_merch_nm[64];
    char h_biz_type[8];
    char h_old_nm[64];
    char h_chg_date[9];
    long h_cnt;
    EXEC SQL END DECLARE SECTION;

    char merch_id[16];
    char merch_nm[64];
    char biz_type[8];

    tx_log(TX_LOG_INFO, "[MM_OL_0003] 가맹점 정보수정 서비스 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch_id, sizeof(merch_id)) != TX_OK ||
        tx_buf_get(ctx->in, "MERCHNM", merch_nm, sizeof(merch_nm)) != TX_OK ||
        tx_buf_get(ctx->in, "BIZTYPE", biz_type, sizeof(biz_type)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[MM_OL_0003] 필수 필드 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "MM0300");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    strncpy(h_merch_id, merch_id, sizeof(h_merch_id) - 1);
    h_merch_id[sizeof(h_merch_id) - 1] = '\0';
    strncpy(h_merch_nm, merch_nm, sizeof(h_merch_nm) - 1);
    h_merch_nm[sizeof(h_merch_nm) - 1] = '\0';
    strncpy(h_biz_type, biz_type, sizeof(h_biz_type) - 1);
    h_biz_type[sizeof(h_biz_type) - 1] = '\0';
    date_today(h_chg_date);

    /* 존재확인 + 기존 상호 조회 */
    EXEC SQL SELECT COUNT(*), MAX(merch_nm) INTO :h_cnt, :h_old_nm
          FROM mm_merchant
         WHERE merch_id = :h_merch_id;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT mm_merchant");
        tx_buf_sets(ctx->out, "ERRCODE", "MM0301");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (h_cnt <= 0) {
        tx_log(TX_LOG_WARN, "[MM_OL_0003] 미등록 가맹점 merch=%s", merch_id);
        tx_buf_sets(ctx->out, "ERRCODE", "MM0302");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[MM_OL_0003] tx_begin 경고");

    EXEC SQL UPDATE mm_merchant
           SET merch_nm  = :h_merch_nm,
               biz_type  = :h_biz_type,
               upd_date  = :h_chg_date
         WHERE merch_id  = :h_merch_id;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("UPDATE mm_merchant");
        tx_abort();
        tx_buf_sets(ctx->out, "ERRCODE", "MM0303");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    EXEC SQL INSERT INTO mm_merchant_hist
               (merch_id, chg_type, chg_date, old_nm, new_nm, biz_type)
        VALUES (:h_merch_id, 'U', :h_chg_date, :h_old_nm, :h_merch_nm, :h_biz_type);

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("INSERT mm_merchant_hist");
        tx_abort();
        tx_buf_sets(ctx->out, "ERRCODE", "MM0304");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_commit();

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "MERCHID", merch_id);
    tx_buf_sets(ctx->out, "MERCHNM", merch_nm);
    tx_buf_sets(ctx->out, "BIZTYPE", biz_type);
    tx_buf_sets(ctx->out, "CHGDATE", h_chg_date);
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[MM_OL_0003] 가맹점 수정완료 merch=%s 상호=%s", merch_id, merch_nm);
    tx_return(ctx, TX_OK, ctx->out);
}