/* @tier medium @module mm @transform master-online */
/*
 * mm_ol_0018.pgc - 가맹점 등급조회 서비스 (MM_OL_0018)  [tier=medium]
 *
 * 가맹점번호로 mm_merchant 의 등급(grade)/등급명을 조회하고, 누적매출
 * 원장(mm_merchant_sales) 에서 누적 매출금액/건수를 함께 읽어 응답한다.
 * 조회 전용(읽기) 서비스. (마스터 참조)
 */
#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_0018, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch_id[16];
    char h_grade[4];
    char h_grade_nm[32];
    long h_sales_amt;
    long h_sales_cnt;
    EXEC SQL END DECLARE SECTION;

    char merch_id[16];
    char won_buf[32];

    tx_log(TX_LOG_INFO, "[MM_OL_0018] 가맹점 등급조회 서비스 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch_id, sizeof(merch_id)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[MM_OL_0018] MERCHID 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "MM1800");
        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';

    /* 1) 가맹점 등급/등급명 조회 */
    EXEC SQL SELECT m.grade, g.grade_nm
          INTO :h_grade, :h_grade_nm
          FROM mm_merchant m
          JOIN mm_grade_code g ON g.grade = m.grade
         WHERE m.merch_id = :h_merch_id;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[MM_OL_0018] 가맹점 없음 merch=%s", merch_id);
        tx_buf_sets(ctx->out, "ERRCODE", "MM1801");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT mm_merchant grade");
        tx_buf_sets(ctx->out, "ERRCODE", "MM1809");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 2) 누적매출 집계(원장). 매출행이 없으면 0 으로 응답 */
    h_sales_amt = 0;
    h_sales_cnt = 0;
    EXEC SQL SELECT COALESCE(SUM(sale_amt), 0), COUNT(*)
          INTO :h_sales_amt, :h_sales_cnt
          FROM mm_merchant_sales
         WHERE merch_id = :h_merch_id;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT mm_merchant_sales");
        tx_buf_sets(ctx->out, "ERRCODE", "MM1802");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    amount_format_won(h_sales_amt, won_buf, sizeof(won_buf));

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "MERCHID", merch_id);
    tx_buf_sets(ctx->out, "GRADE", h_grade);
    tx_buf_sets(ctx->out, "GRADENM", h_grade_nm);
    tx_buf_setlong(ctx->out, "SALESAMT", h_sales_amt);
    tx_buf_setlong(ctx->out, "SALESCNT", h_sales_cnt);
    tx_buf_sets(ctx->out, "SALESWON", won_buf);
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[MM_OL_0018] 등급조회 완료 merch=%s grade=%s 누적=%ld",
           merch_id, h_grade, h_sales_amt);
    tx_return(ctx, TX_OK, ctx->out);
}