/* @tier medium @module py @transform payment-online */
/*
 * py_ol_0016.pgc - 지급 수수료 계산(등급별 요율 UPDATE) (PY_OL_0016)  [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_0016, ctx)
{
    char key[16];
    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[PY_OL_0016] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16], h_grade[2];
    long h_amount, h_fee;
    EXEC SQL END DECLARE SECTION;

    char grade[4];
    int  rate;

    tx_log(TX_LOG_INFO, "[PY_OL_0016] 지급 수수료 계산 진입");
    if (tx_buf_get(ctx->in, "GRADE", grade, sizeof(grade)) != TX_OK)
        strcpy(grade, "C");
    strncpy(h_key, key, 15); h_key[15] = '\0';
    strncpy(h_grade, grade, 1); h_grade[1] = '\0';

    EXEC SQL SELECT amount INTO :h_amount FROM py_ledger WHERE key = :h_key;
    if (sqlca.sqlcode == TX_SQL_NOTFOUND) { tx_return(ctx, TX_ENOENT, ctx->out); return; }

    /* 가맹점 등급별 지급수수료율 (basis point) */
    rate = (h_grade[0] == 'A') ? 5 : (h_grade[0] == 'B') ? 10 : 20;
    h_fee = h_amount * rate / 10000;

    if (tx_begin() != TX_OK) tx_log(TX_LOG_WARN, "[PY_OL_0016] tx_begin 경고");
    EXEC SQL UPDATE py_ledger SET fee = :h_fee, upd_ts = now() WHERE key = :h_key;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("py_ol_0016 수수료"); tx_abort();
        tx_return(ctx, TX_EDB, ctx->out); return;
    }
    tx_commit();

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "GRADE", grade);
    tx_buf_setlong(ctx->out, "RATEBP", rate);
    tx_buf_setlong(ctx->out, "FEE", h_fee);
    tx_log(TX_LOG_INFO, "[PY_OL_0016] 수수료 grade=%s fee=%ld", grade, h_fee);
    tx_return(ctx, TX_OK, ctx->out);
}
