/* @tier easy @module mm @transform master-online */
/*
 * mm_ol_0008.pgc - 한도 마스터 변경 서비스 (MM_OL_0008)  [tier=easy]
 *
 * 가맹점 승인한도(mm_limit)의 일한도/월한도를 변경한다. 일한도가 월한도를
 * 초과하지 않도록 검증한 뒤 UPDATE 하고, 변경이력(mm_limit_hist) 에 이전/
 * 이후 한도를 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_0008, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch_id[16];
    char h_chg_date[9];
    long h_new_daily;
    long h_new_monthly;
    long h_old_daily;
    long h_old_monthly;
    EXEC SQL END DECLARE SECTION;

    char merch_id[16];
    long new_daily = 0;
    long new_monthly = 0;

    tx_log(TX_LOG_INFO, "[MM_OL_0008] 한도 마스터 변경 서비스 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch_id, sizeof(merch_id)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[MM_OL_0008] MERCHID 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "MM0800");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    tx_buf_getlong(ctx->in, "DAILYLIMIT", &new_daily);
    tx_buf_getlong(ctx->in, "MONTHLYLIMIT", &new_monthly);

    /* 검증: 한도는 양수, 일한도 <= 월한도 */
    if (new_daily <= 0 || new_monthly <= 0 || new_daily > new_monthly) {
        tx_log(TX_LOG_WARN, "[MM_OL_0008] 한도값 오류 일=%ld 월=%ld",
               new_daily, new_monthly);
        tx_buf_sets(ctx->out, "ERRCODE", "MM0801");
        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';
    h_new_daily = new_daily;
    h_new_monthly = new_monthly;
    date_today(h_chg_date);

    /* 기존 한도 조회 (존재확인 + 이력용) */
    EXEC SQL SELECT daily_limit, monthly_limit
          INTO :h_old_daily, :h_old_monthly
          FROM mm_limit
         WHERE merch_id = :h_merch_id;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[MM_OL_0008] 한도 미등록 merch=%s", merch_id);
        tx_buf_sets(ctx->out, "ERRCODE", "MM0802");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT mm_limit");
        tx_buf_sets(ctx->out, "ERRCODE", "MM0803");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[MM_OL_0008] tx_begin 경고");

    EXEC SQL UPDATE mm_limit
           SET daily_limit   = :h_new_daily,
               monthly_limit = :h_new_monthly,
               upd_date      = :h_chg_date
         WHERE merch_id      = :h_merch_id;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("UPDATE mm_limit");
        tx_abort();
        tx_buf_sets(ctx->out, "ERRCODE", "MM0804");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    EXEC SQL INSERT INTO mm_limit_hist
               (merch_id, old_daily, new_daily, old_monthly, new_monthly, chg_date)
        VALUES (:h_merch_id, :h_old_daily, :h_new_daily,
                :h_old_monthly, :h_new_monthly, :h_chg_date);

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("INSERT mm_limit_hist");
        tx_abort();
        tx_buf_sets(ctx->out, "ERRCODE", "MM0805");
        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_setlong(ctx->out, "OLDDAILY", h_old_daily);
    tx_buf_setlong(ctx->out, "DAILYLIMIT", h_new_daily);
    tx_buf_setlong(ctx->out, "OLDMONTHLY", h_old_monthly);
    tx_buf_setlong(ctx->out, "MONTHLYLIMIT", h_new_monthly);
    tx_buf_sets(ctx->out, "CHGDATE", h_chg_date);
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[MM_OL_0008] 한도변경완료 merch=%s 일=%ld 월=%ld",
           merch_id, h_new_daily, h_new_monthly);
    tx_return(ctx, TX_OK, ctx->out);
}