/* @tier easy @module cl @transform closing-dbio */
/*
 * cl_io_0006.pgc - 마감 보조 DBIO (ECPG)  [tier=easy]
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.h"
#include "cl_io_0006.h"

EXEC SQL INCLUDE sqlca;

int cl_io_0006_fetch(const char *key, long *out_amount)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char  h_key[20];
    long  h_min;
    long  h_max;
    short h_i1;
    short h_i2;
    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 min(tax_amt), max(tax_amt)
        INTO :h_min:h_i1, :h_max:h_i2
        FROM cls_account
        WHERE acct_no = :h_key
          AND post_yn <> 'D';
    if (sqlca.sqlcode == TX_SQL_NOTFOUND)
        return TX_ENOENT;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("cl_io_0006_fetch");
        return TX_EDB;
    }
    if (h_i1 < 0 || h_i2 < 0)
        return TX_ENOENT;
    *out_amount = h_max - h_min;
    return TX_OK;
}

int cl_io_0006_touch(const char *key, long amount)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[20];
    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 cls_month
        SET tax_amt = :h_amt, upd_ts = now()
        WHERE acct_no = :h_key
          AND post_yn = 'A';
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("cl_io_0006_touch");
        return TX_EDB;
    }
    if (sqlca.sqlerrd[2] == 0)
        return TX_ENOENT;
    return TX_OK;
}

long cl_io_0006_total(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_bd[9];
    long h_avg;
    EXEC SQL END DECLARE SECTION;

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

    EXEC SQL SELECT coalesce(avg(tax_amt), 0)::bigint
        INTO :h_avg
        FROM cls_month
        WHERE post_dt = :h_bd
          AND post_yn = 'A';
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("cl_io_0006_total");
        return -1;
    }
    return h_avg;
}