/* @tier easy @module vl @transform validation-batch */
/*
 * vl_bt_0012.pgc - 참조무결성 배치검증 (VL_BT_0012)  [tier=easy]
 *
 * 지정 영업일 원장(vl_ledger) 을 커서로 순회하며, 참조 대상인 가맹점
 * (mm_merchant) 과 카드사(mm_issuer, 카드 BIN 6자리 기준) 의 존재 여부를
 * 확인한다. 참조키가 부재하면 무결성 위반으로 불일치('U'), 모두 존재하면
 * 완료('M') 로 전이한다. 배치 main 엔트리 포함.
 *
 * 실행:  vl_bt_0012 <YYYYMMDD> [db@host]
 */
#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;

static int run_vl_bt_0012(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_key[16];
    char h_merch_id[16];
    char h_bin[7];
    long h_merch_exist;
    long h_issuer_exist;
    char h_new_status[2];
    EXEC SQL END DECLARE SECTION;

    long total = 0, ok = 0, merch_miss = 0, issuer_miss = 0, errcnt = 0;
    int  bad;
    int  rc;

    strncpy(h_biz_date, biz_date, sizeof(h_biz_date) - 1);
    h_biz_date[sizeof(h_biz_date) - 1] = '\0';

    /* 카드번호 앞 6자리(BIN) 를 SQL 에서 추출하여 조회 */
    EXEC SQL DECLARE cur_vl_bt_0012 CURSOR FOR
        SELECT key, merch_id, SUBSTR(card_no, 1, 6)
        FROM vl_ledger
        WHERE biz_date = :h_biz_date
          AND status   = 'R'
        ORDER BY key;

    EXEC SQL OPEN cur_vl_bt_0012;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_vl_bt_0012");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[vl_bt_0012] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_vl_bt_0012 INTO :h_key, :h_merch_id, :h_bin;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_vl_bt_0012");
            errcnt++;
            break;
        }

        total++;
        bad = 0;

        /* FK 1: 가맹점 존재 여부 */
        h_merch_exist = 0;
        EXEC SQL SELECT COUNT(*) INTO :h_merch_exist
                 FROM mm_merchant
                 WHERE merch_id = :h_merch_id;
        if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
            TX_DBIO_LOG_ERR("SELECT mm_merchant");
            errcnt++;
            continue;
        }
        if (h_merch_exist == 0) {
            merch_miss++;
            bad = 1;
            tx_log(TX_LOG_WARN, "[vl_bt_0012] 가맹점FK부재 key=%s merch=%s",
                   h_key, h_merch_id);
        }

        /* FK 2: 카드사(BIN) 존재 여부 */
        h_issuer_exist = 0;
        EXEC SQL SELECT COUNT(*) INTO :h_issuer_exist
                 FROM mm_issuer
                 WHERE bin = :h_bin;
        if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
            TX_DBIO_LOG_ERR("SELECT mm_issuer");
            errcnt++;
            continue;
        }
        if (h_issuer_exist == 0) {
            issuer_miss++;
            bad = 1;
            tx_log(TX_LOG_WARN, "[vl_bt_0012] 카드사FK부재 key=%s bin=%s",
                   h_key, h_bin);
        }

        if (bad) {
            strncpy(h_new_status, VL_ST_FAIL, sizeof(h_new_status));
        } else {
            strncpy(h_new_status, VL_ST_DONE, sizeof(h_new_status));
            ok++;
        }

        rc = vl_rec_update_status(h_key, h_new_status);
        if (rc != TX_OK) {
            tx_log(TX_LOG_ERROR, "[vl_bt_0012] 상태전이 실패 key=%s rc=%d", h_key, rc);
            errcnt++;
        }
    }

    EXEC SQL CLOSE cur_vl_bt_0012;

    if (errcnt == 0)
        tx_commit();
    else
        tx_abort();

    tx_log(TX_LOG_INFO,
           "[vl_bt_0012] 요약 date=%s 대상=%ld 정상=%ld 가맹점부재=%ld 카드사부재=%ld 오류=%ld",
           biz_date, total, ok, merch_miss, issuer_miss, errcnt);

    printf("========== 참조무결성 배치검증 [vl_bt_0012] ==========\n");
    printf("  영업일          : %s\n", biz_date);
    printf("  대상 건수       : %ld\n", total);
    printf("  정상(M)         : %ld\n", ok);
    printf("  가맹점FK부재(U) : %ld\n", merch_miss);
    printf("  카드사FK부재(U) : %ld\n", issuer_miss);
    printf("  오류 건수       : %ld\n", errcnt);
    printf("==================================================\n");

    return (errcnt == 0) ? TX_OK : TX_FAIL;
}

int main(int argc, char **argv)
{
    const char *biz_date;
    const char *target;
    int rc;

    tx_set_loglevel(TX_LOG_INFO);

    if (argc < 2) {
        fprintf(stderr, "사용법: %s <YYYYMMDD> [db@host]\n", argv[0]);
        return 2;
    }
    biz_date = argv[1];
    target   = (argc >= 3) ? argv[2] : NULL;

    if (!date_is_valid(biz_date)) {
        fprintf(stderr, "오류: 유효하지 않은 영업일 '%s'\n", biz_date);
        return 2;
    }

    tx_log(TX_LOG_INFO, "[vl_bt_0012] 배치 시작 date=%s", biz_date);

    rc = vl_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[vl_bt_0012] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_vl_bt_0012(biz_date);

    vl_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[vl_bt_0012] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
