/* @tier easy @module vl @transform validation-online */
/*
 * vl_ol_0017.pgc - 참조무결성 검증 서비스 (VL_OL_0017)
 *
 * 원장(vl_rec_select) 의 가맹점ID 가 가맹점 마스터(mm_merchant) 에, 입력 카드사코드
 * 가 발급사 마스터(vl_issuer) 에 각각 존재하는지 두 건의 참조를 검증한다. 어느 한쪽
 * 이라도 부모행이 없으면 참조무결성 위반(VL17xx) 으로 판정한다.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(VL_OL_0017, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch[16];
    char h_issuer[8];
    long h_merch_cnt;
    long h_issuer_cnt;
    EXEC SQL END DECLARE SECTION;

    vl_rec_t rec;
    char key[16], issuer[8];
    int  rc;

    tx_log(TX_LOG_INFO, "[VL_OL_0017] 참조무결성 검증 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK ||
        tx_buf_get(ctx->in, "ISSUER", issuer, sizeof(issuer)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0017] 필수 필드 누락(KEY/ISSUER)");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1700");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    /* 1) 원장에서 가맹점ID 확보 */
    memset(&rec, 0, sizeof(rec));
    rc = vl_rec_select(key, &rec);
    if (rc != TX_OK) {
        tx_log(TX_LOG_WARN, "[VL_OL_0017] 원장 조회 실패 key=%s rc=%d", key, rc);
        tx_buf_sets(ctx->out, "ERRCODE", "VL1701");
        tx_return(ctx, rc, ctx->out);
        return;
    }

    strncpy(h_merch, rec.merch_id, sizeof(h_merch) - 1);
    h_merch[sizeof(h_merch) - 1] = '\0';
    strncpy(h_issuer, issuer, sizeof(h_issuer) - 1);
    h_issuer[sizeof(h_issuer) - 1] = '\0';
    h_merch_cnt = 0;
    h_issuer_cnt = 0;

    /* 2) 가맹점 참조 확인 */
    EXEC SQL SELECT COUNT(*)
          INTO :h_merch_cnt
          FROM mm_merchant
         WHERE merch_id = :h_merch;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT COUNT mm_merchant");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1709");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 3) 발급사(카드사코드) 참조 확인 */
    EXEC SQL SELECT COUNT(*)
          INTO :h_issuer_cnt
          FROM vl_issuer
         WHERE issuer_code = :h_issuer;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT COUNT vl_issuer");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1719");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 4) 무결성 판정 */
    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_sets(ctx->out, "MERCHID", rec.merch_id);
    tx_buf_sets(ctx->out, "ISSUER", issuer);
    tx_buf_setlong(ctx->out, "MERCHREF", h_merch_cnt);
    tx_buf_setlong(ctx->out, "ISSUERREF", h_issuer_cnt);

    if (h_merch_cnt < 1) {
        tx_log(TX_LOG_WARN, "[VL_OL_0017] 가맹점 참조 위반 merch=%s", rec.merch_id);
        tx_buf_sets(ctx->out, "RESULT", "MISMATCH");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1703");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }
    if (h_issuer_cnt < 1) {
        tx_log(TX_LOG_WARN, "[VL_OL_0017] 발급사 참조 위반 issuer=%s", issuer);
        tx_buf_sets(ctx->out, "RESULT", "MISMATCH");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1704");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    tx_buf_sets(ctx->out, "RESULT", "MATCH");
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[VL_OL_0017] 참조무결성 정상 merch=%s issuer=%s",
           rec.merch_id, issuer);
    tx_return(ctx, TX_OK, ctx->out);
}