/* @tier hard @module vl @transform validation-online */
/*
 * vl_ol_0006.pgc - 카드 유효성(BIN/유효기간) 검증 서비스 (VL_OL_0006)
 *
 * 입력 카드번호의 앞 6자리(BIN)로 카드 BIN 마스터(vl_card_bin) 를 조회하여
 * 발급사/카드상태/유효기간(expire_ym, YYYYMM)을 확인한다. BIN 미등록이거나
 * 카드상태가 정상('N') 이 아니거나 유효기간이 만료되었으면 불일치(VL06xx).
 */
#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_0006, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_bin[7];
    char h_issuer[8];
    char h_card_status[2];
    char h_expire_ym[7];
    EXEC SQL END DECLARE SECTION;

    char card[20];
    char cur_ym[7];
    char today[9];

    tx_log(TX_LOG_INFO, "[VL_OL_0006] 카드 유효성 검증 서비스 진입");

    if (tx_buf_get(ctx->in, "CARDNO", card, sizeof(card)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0006] CARDNO 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "VL0600");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (strlen(card) < 6) {
        tx_log(TX_LOG_WARN, "[VL_OL_0006] 카드번호 길이 오류 len=%d", (int)strlen(card));
        tx_buf_sets(ctx->out, "ERRCODE", "VL0601");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    /* 1) BIN 6자리 추출 */
    memset(h_bin, 0, sizeof(h_bin));
    memcpy(h_bin, card, 6);
    h_bin[6] = '\0';
    memset(h_issuer, 0, sizeof(h_issuer));
    memset(h_card_status, 0, sizeof(h_card_status));
    memset(h_expire_ym, 0, sizeof(h_expire_ym));

    /* 2) BIN 마스터 조회 */
    EXEC SQL SELECT issuer_code, card_status, expire_ym
          INTO :h_issuer, :h_card_status, :h_expire_ym
          FROM vl_card_bin
         WHERE bin = :h_bin;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[VL_OL_0006] 미등록 BIN bin=%s", h_bin);
        tx_buf_sets(ctx->out, "RESULT", "MISMATCH");
        tx_buf_sets(ctx->out, "ERRCODE", "VL0602");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT vl_card_bin");
        tx_buf_sets(ctx->out, "ERRCODE", "VL0609");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 3) 상태/유효기간 판정 (YYYYMM 비교) */
    date_today(today);
    memcpy(cur_ym, today, 6);
    cur_ym[6] = '\0';

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "BIN", h_bin);
    tx_buf_sets(ctx->out, "ISSUER", h_issuer);
    tx_buf_sets(ctx->out, "CARDSTATUS", h_card_status);
    tx_buf_sets(ctx->out, "EXPIREYM", h_expire_ym);

    if (memcmp(h_card_status, "N", 1) != 0) {
        tx_log(TX_LOG_WARN, "[VL_OL_0006] 카드상태 비정상 bin=%s status=%s",
               h_bin, h_card_status);
        tx_buf_sets(ctx->out, "RESULT", "MISMATCH");
        tx_buf_sets(ctx->out, "ERRCODE", "VL0603");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }
    if (strcmp(h_expire_ym, cur_ym) < 0) {
        tx_log(TX_LOG_WARN, "[VL_OL_0006] 유효기간 만료 bin=%s expire=%s cur=%s",
               h_bin, h_expire_ym, cur_ym);
        tx_buf_sets(ctx->out, "RESULT", "MISMATCH");
        tx_buf_sets(ctx->out, "ERRCODE", "VL0604");
        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_0006] 카드 유효 bin=%s issuer=%s", h_bin, h_issuer);
    tx_return(ctx, TX_OK, ctx->out);
}