/* @tier medium @module py @transform payment-online */
/*
 * py_ol_0015.pgc - 지급 금액변경(확정 전 금액 조정) (PY_OL_0015)  [tier=medium]
 *
 * TxCore TX_SERVICE 엔트리. 요청 TXBUF 를 검증하고 임베디드 SQL / 표준
 * DBIO / tx_call 로 처리한 뒤 응답 TXBUF 를 구성한다.
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.h"
#include "acq_util.h"
#include "py_core.h"

EXEC SQL INCLUDE sqlca;

TX_SERVICE(PY_OL_0015, ctx)
{
    char key[16];
    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[PY_OL_0015] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16], h_status[2];
    long h_new, h_old, h_fee;
    EXEC SQL END DECLARE SECTION;

    long newamt = 0;

    tx_log(TX_LOG_INFO, "[PY_OL_0015] 지급 금액변경 진입");
    tx_buf_getlong(ctx->in, "NEWAMT", &newamt);
    if (!amount_is_valid(newamt)) { tx_return(ctx, TX_EINVAL, ctx->out); return; }
    strncpy(h_key, key, 15); h_key[15] = '\0';
    h_new = newamt;
    h_fee = newamt * 15 / 10000;

    EXEC SQL SELECT amount, status INTO :h_old, :h_status
        FROM py_ledger WHERE key = :h_key;
    if (sqlca.sqlcode == TX_SQL_NOTFOUND) { tx_return(ctx, TX_ENOENT, ctx->out); return; }
    if (h_status[0] == 'S') {
        tx_log(TX_LOG_WARN, "[PY_OL_0015] 이체완료건 변경불가 key=%s", key);
        tx_return(ctx, TX_FAIL, ctx->out); return;
    }

    if (tx_begin() != TX_OK) tx_log(TX_LOG_WARN, "[PY_OL_0015] tx_begin 경고");
    EXEC SQL UPDATE py_ledger SET amount = :h_new, fee = :h_fee, upd_ts = now()
        WHERE key = :h_key;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("py_ol_0015 변경"); tx_abort();
        tx_return(ctx, TX_EDB, ctx->out); return;
    }
    tx_commit();

    tx_buf_reset(ctx->out);
    tx_buf_setlong(ctx->out, "OLDAMT", h_old);
    tx_buf_setlong(ctx->out, "NEWAMT", h_new);
    tx_buf_setlong(ctx->out, "FEE", h_fee);
    tx_log(TX_LOG_INFO, "[PY_OL_0015] 금액변경 %ld -> %ld", h_old, h_new);
    tx_return(ctx, TX_OK, ctx->out);
}