/* @tier medium @module vl @transform validation-online */
/*
 * vl_ol_0013.pgc - 수수료 정합 검증 서비스 (VL_OL_0013)
 *
 * 원장(vl_rec_select) 의 거래금액/수수료를 확보하고, 가맹점 수수료율 테이블
 * (vl_fee_rate, 만분율 bps) 을 조회하여 기대수수료(금액*요율/10000) 를 계산한다.
 * 원장 수수료와 기대수수료가 다르면 불일치(VL13xx).
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(VL_OL_0013, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch[16];
    long h_fee_rate;
    EXEC SQL END DECLARE SECTION;

    vl_rec_t rec;
    char key[16];
    long expected_fee, fee_diff;
    int  rc;

    tx_log(TX_LOG_INFO, "[VL_OL_0013] 수수료 정합 검증 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0013] KEY 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1300");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    /* 1) 원장 금액/수수료 확보 */
    memset(&rec, 0, sizeof(rec));
    rc = vl_rec_select(key, &rec);
    if (rc != TX_OK) {
        tx_log(TX_LOG_WARN, "[VL_OL_0013] 원장 조회 실패 key=%s rc=%d", key, rc);
        tx_buf_sets(ctx->out, "ERRCODE", "VL1301");
        tx_return(ctx, rc, ctx->out);
        return;
    }

    /* 2) 가맹점 수수료율(bps) 조회 */
    strncpy(h_merch, rec.merch_id, sizeof(h_merch) - 1);
    h_merch[sizeof(h_merch) - 1] = '\0';
    h_fee_rate = 0;

    EXEC SQL SELECT fee_rate_bps
          INTO :h_fee_rate
          FROM vl_fee_rate
         WHERE merch_id = :h_merch;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[VL_OL_0013] 수수료율 미설정 merch=%s", rec.merch_id);
        tx_buf_sets(ctx->out, "RESULT", "MISMATCH");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1302");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT vl_fee_rate");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1309");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 3) 기대수수료 계산 및 판정 (만분율) */
    expected_fee = (rec.amount * h_fee_rate) / 10000;
    fee_diff = rec.fee - expected_fee;

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_sets(ctx->out, "MERCHID", rec.merch_id);
    tx_buf_setlong(ctx->out, "AMOUNT", rec.amount);
    tx_buf_setlong(ctx->out, "FEERATE", h_fee_rate);
    tx_buf_setlong(ctx->out, "LEDGERFEE", rec.fee);
    tx_buf_setlong(ctx->out, "EXPECTEDFEE", expected_fee);
    tx_buf_setlong(ctx->out, "FEEDIFF", fee_diff);

    if (fee_diff != 0) {
        tx_log(TX_LOG_WARN, "[VL_OL_0013] 수수료 불일치 key=%s ledger=%ld expected=%ld",
               key, rec.fee, expected_fee);
        tx_buf_sets(ctx->out, "RESULT", "MISMATCH");
        tx_buf_sets(ctx->out, "ERRCODE", "VL1303");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    tx_buf_sets(ctx->out, "RESULT", "MATCH");
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[VL_OL_0013] 수수료 정합 key=%s fee=%ld", key, rec.fee);
    tx_return(ctx, TX_OK, ctx->out);
}