/* @tier hard @module au @transform authorization-online */
/*
 * au_ol_0012.pgc - 승인 재시도(실패건 매입사 재요청) (AU_OL_0012)  [tier=hard]
 *
 * 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 "au_core.h"

EXEC SQL INCLUDE sqlca;

TX_SERVICE(AU_OL_0012, ctx)
{
    char key[16];
    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AU_OL_0012] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16], h_status[2];
    long h_amount;
    EXEC SQL END DECLARE SECTION;

    TXBUF *req;
    int  rc, attempt;

    tx_log(TX_LOG_INFO, "[AU_OL_0012] 승인 재시도 진입");
    strncpy(h_key, key, 15); h_key[15] = '\0';

    EXEC SQL SELECT amount, status INTO :h_amount, :h_status
        FROM au_ledger WHERE key = :h_key;
    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (h_status[0] != 'U') {
        tx_log(TX_LOG_WARN, "[AU_OL_0012] 재시도 대상아님 status=%s", h_status);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    req = tx_buf_alloc();
    if (!req) { tx_return(ctx, TX_ENOMEM, ctx->out); return; }
    tx_buf_sets(req, "KEY", key);
    tx_buf_setlong(req, "AMOUNT", h_amount);

    rc = TX_FAIL;
    for (attempt = 1; attempt <= 3; attempt++) {
        tx_buf_reset(ctx->out);
        rc = tx_call("AU_ISSUER", req, ctx->out);
        tx_log(TX_LOG_INFO, "[AU_OL_0012] 재시도 %d회 rc=%d", attempt, rc);
        if (rc == TX_OK) break;
    }
    tx_buf_free(req);

    if (rc == TX_OK) {
        EXEC SQL UPDATE au_ledger SET status = 'M', upd_ts = now()
            WHERE key = :h_key;
        tx_commit();
    }
    tx_buf_setlong(ctx->out, "ATTEMPTS", attempt);
    tx_return(ctx, rc, ctx->out);
}