/* @tier easy @module vl @transform validation-dbio */
/*
 * vl_io_0003.pgc - 정합성 보조 DBIO (ECPG)  [tier=easy]
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.h"
#include "vl_io_0003.h"

EXEC SQL INCLUDE sqlca;

int vl_io_0003_fetch(const char *key, long *out_amount)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[32];
    long h_val;
    EXEC SQL END DECLARE SECTION;

    if (!key || !out_amount)
        return TX_EINVAL;
    strncpy(h_key, key, sizeof(h_key) - 1);
    h_key[sizeof(h_key) - 1] = '\0';

    EXEC SQL SELECT a.recon_amt
        INTO :h_val
        FROM vl_recon_ledger a
        JOIN vl_recon_src b ON a.recon_key = b.recon_key
        WHERE a.recon_key = :h_key;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND)
        return TX_ENOENT;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("vl_io_0003_fetch");
        return TX_EDB;
    }
    *out_amount = h_val;
    return TX_OK;
}

int vl_io_0003_touch(const char *key, long amount)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[32];
    long h_amt;
    EXEC SQL END DECLARE SECTION;

    if (!key)
        return TX_EINVAL;
    strncpy(h_key, key, sizeof(h_key) - 1);
    h_key[sizeof(h_key) - 1] = '\0';
    h_amt = amount;

    EXEC SQL UPDATE vl_recon_ledger
        SET book_amt = :h_amt
        WHERE recon_key = :h_key AND recon_amt >= :h_amt;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("vl_io_0003_touch");
        return TX_EDB;
    }
    if (sqlca.sqlerrd[2] == 0)
        return TX_ENOENT;
    return TX_OK;
}

long vl_io_0003_total(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_dt[16];
    long h_max;
    short h_ind;
    EXEC SQL END DECLARE SECTION;

    if (!biz_date)
        return -1;
    strncpy(h_dt, biz_date, sizeof(h_dt) - 1);
    h_dt[sizeof(h_dt) - 1] = '\0';

    EXEC SQL SELECT max(recon_amt)
        INTO :h_max:h_ind
        FROM vl_recon_ledger
        WHERE biz_date = :h_dt;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("vl_io_0003_total");
        return -1;
    }
    if (h_ind < 0)
        return 0;
    return h_max;
}