/* @tier medium @module mm @transform master-online */
/*
 * mm_ol_0016.pgc - 가맹점 계좌변경 서비스 (MM_OL_0016)  [tier=medium]
 *
 * 가맹점 정산계좌를 변경한다. 계좌번호 형식(숫자 10~16자리)을 검증하고
 * mm_merchant_acct 를 UPDATE(재검증 필요상태로 초기화) 한 뒤, 계좌변경
 * 이력(mm_acct_hist) 에 이전/이후 계좌를 남긴다. (CRUD + 이력)
 */
#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_0016, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch_id[16];
    char h_bank_cd[8];
    char h_acct_no[24];
    char h_holder_nm[64];
    char h_verify_yn[2];
    char h_chg_date[9];
    char h_old_bank[8];
    char h_old_acct[24];
    EXEC SQL END DECLARE SECTION;

    char merch_id[16];
    char bank_cd[8];
    char acct_no[24];
    char holder_nm[64];
    int  len, i;

    tx_log(TX_LOG_INFO, "[MM_OL_0016] 가맹점 계좌변경 서비스 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch_id, sizeof(merch_id)) != TX_OK ||
        tx_buf_get(ctx->in, "BANKCD", bank_cd, sizeof(bank_cd)) != TX_OK ||
        tx_buf_get(ctx->in, "ACCTNO", acct_no, sizeof(acct_no)) != TX_OK ||
        tx_buf_get(ctx->in, "HOLDERNM", holder_nm, sizeof(holder_nm)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[MM_OL_0016] 필수 필드 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "MM1600");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    /* 계좌번호 형식검증: 숫자 10~16자리 */
    len = (int)strlen(acct_no);
    if (len < 10 || len > 16) {
        tx_log(TX_LOG_WARN, "[MM_OL_0016] 계좌 길이오류 acct=%s len=%d", acct_no, len);
        tx_buf_sets(ctx->out, "ERRCODE", "MM1601");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    for (i = 0; i < len; i++) {
        if (acct_no[i] < '0' || acct_no[i] > '9') {
            tx_log(TX_LOG_WARN, "[MM_OL_0016] 계좌 숫자아님 acct=%s", acct_no);
            tx_buf_sets(ctx->out, "ERRCODE", "MM1601");
            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';
    strncpy(h_bank_cd, bank_cd, sizeof(h_bank_cd) - 1);
    h_bank_cd[sizeof(h_bank_cd) - 1] = '\0';
    strncpy(h_acct_no, acct_no, sizeof(h_acct_no) - 1);
    h_acct_no[sizeof(h_acct_no) - 1] = '\0';
    strncpy(h_holder_nm, holder_nm, sizeof(h_holder_nm) - 1);
    h_holder_nm[sizeof(h_holder_nm) - 1] = '\0';
    strncpy(h_verify_yn, "N", sizeof(h_verify_yn) - 1);   /* 변경시 재검증 필요 */
    h_verify_yn[sizeof(h_verify_yn) - 1] = '\0';
    date_today(h_chg_date);

    /* 기존 계좌 조회 (존재확인 + 이력용) */
    EXEC SQL SELECT bank_cd, acct_no
          INTO :h_old_bank, :h_old_acct
          FROM mm_merchant_acct
         WHERE merch_id = :h_merch_id;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[MM_OL_0016] 계좌 미등록 merch=%s", merch_id);
        tx_buf_sets(ctx->out, "ERRCODE", "MM1602");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT mm_merchant_acct");
        tx_buf_sets(ctx->out, "ERRCODE", "MM1603");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[MM_OL_0016] tx_begin 경고");

    EXEC SQL UPDATE mm_merchant_acct
           SET bank_cd   = :h_bank_cd,
               acct_no   = :h_acct_no,
               holder_nm = :h_holder_nm,
               verify_yn = :h_verify_yn,
               upd_date  = :h_chg_date
         WHERE merch_id  = :h_merch_id;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("UPDATE mm_merchant_acct");
        tx_abort();
        tx_buf_sets(ctx->out, "ERRCODE", "MM1604");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    EXEC SQL INSERT INTO mm_acct_hist
               (merch_id, old_bank, old_acct, new_bank, new_acct, chg_date)
        VALUES (:h_merch_id, :h_old_bank, :h_old_acct,
                :h_bank_cd, :h_acct_no, :h_chg_date);

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("INSERT mm_acct_hist");
        tx_abort();
        tx_buf_sets(ctx->out, "ERRCODE", "MM1605");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_commit();

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "MERCHID", merch_id);
    tx_buf_sets(ctx->out, "BANKCD", bank_cd);
    tx_buf_sets(ctx->out, "ACCTNO", acct_no);
    tx_buf_sets(ctx->out, "HOLDERNM", holder_nm);
    tx_buf_sets(ctx->out, "VERIFYYN", h_verify_yn);
    tx_buf_sets(ctx->out, "CHGDATE", h_chg_date);
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[MM_OL_0016] 계좌변경완료 merch=%s bank=%s", merch_id, bank_cd);
    tx_return(ctx, TX_OK, ctx->out);
}
