/* @tier medium @module mm @transform master-online */
/*
 * mm_ol_0025.pgc - 카드사별 가맹점수 집계 서비스 (MM_OL_0025)  [tier=medium]
 *
 * 입력 카드사코드에 소속(주거래 카드사)된 가맹점 수를 mm_merchant 에서
 * COUNT 로 집계한다. 카드사 마스터(mm_issuer) 존재 확인 후, 정상 상태
 * 가맹점 수도 함께 집계하여 응답한다. 조회 전용(읽기) 서비스. (마스터 집계)
 */
#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_0025, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_issuer_cd[4];
    char h_issuer_nm[32];
    char h_st_done[2];
    long h_total_cnt;
    long h_active_cnt;
    EXEC SQL END DECLARE SECTION;

    char issuer_cd[4];

    tx_log(TX_LOG_INFO, "[MM_OL_0025] 카드사별 가맹점수 집계 서비스 진입");

    if (tx_buf_get(ctx->in, "ISSUERCD", issuer_cd, sizeof(issuer_cd)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[MM_OL_0025] ISSUERCD 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "MM2500");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    strncpy(h_issuer_cd, issuer_cd, sizeof(h_issuer_cd) - 1);
    h_issuer_cd[sizeof(h_issuer_cd) - 1] = '\0';
    strncpy(h_st_done, MM_ST_DONE, sizeof(h_st_done));

    /* 1) 카드사 마스터 존재 확인 */
    EXEC SQL
        SELECT issuer_nm INTO :h_issuer_nm
          FROM mm_issuer
         WHERE issuer_cd = :h_issuer_cd;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[MM_OL_0025] 카드사 미등록 issuer=%s", issuer_cd);
        tx_buf_sets(ctx->out, "ERRCODE", "MM2501");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT mm_issuer");
        tx_buf_sets(ctx->out, "ERRCODE", "MM2509");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 2) 소속 가맹점 총수 집계 */
    h_total_cnt = 0;
    EXEC SQL
        SELECT COUNT(*) INTO :h_total_cnt
          FROM mm_merchant
         WHERE issuer_cd = :h_issuer_cd;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("COUNT mm_merchant total");
        tx_buf_sets(ctx->out, "ERRCODE", "MM2509");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 3) 정상 상태 가맹점 수 집계 */
    h_active_cnt = 0;
    EXEC SQL
        SELECT COUNT(*) INTO :h_active_cnt
          FROM mm_merchant
         WHERE issuer_cd = :h_issuer_cd
           AND status = :h_st_done;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("COUNT mm_merchant active");
        tx_buf_sets(ctx->out, "ERRCODE", "MM2509");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "ISSUERCD", issuer_cd);
    tx_buf_sets(ctx->out, "ISSUERNM", h_issuer_nm);
    tx_buf_setlong(ctx->out, "TOTALCNT", h_total_cnt);
    tx_buf_setlong(ctx->out, "ACTIVECNT", h_active_cnt);
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[MM_OL_0025] 집계완료 issuer=%s 총%ld 정상%ld",
           issuer_cd, h_total_cnt, h_active_cnt);
    tx_return(ctx, TX_OK, ctx->out);
}