/* @tier easy @module ac @transform acquire-online */
/*
 * ac_ol_0012.pgc - 매입 온라인 서비스 (AC_OL_0012)  [tier=easy]
 *
 * 매입 수수료 조정: KEY 원장의 수수료를 재계산한다. NEWRATE(bp)가 오면
 * 해당 요율을, 없으면 merchant.fee_rate 를 사용해 신규 수수료를 산출하고
 * ac_ledger.fee 를 갱신한다.
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(AC_OL_0012, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    long h_amount;
    char h_merch[16];
    long h_oldfee;
    long h_rate;
    long h_newfee;
    EXEC SQL END DECLARE SECTION;

    char key[16];
    long newrate = 0;
    int  has_newrate;

    tx_log(TX_LOG_INFO, "[AC_OL_0012] 매입 수수료 조정 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0012] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    has_newrate = (tx_buf_getlong(ctx->in, "NEWRATE", &newrate) == TX_OK && newrate > 0);

    strncpy(h_key, key, sizeof(h_key) - 1);
    h_key[sizeof(h_key) - 1] = '\0';

    EXEC SQL SELECT amount, merch_id, fee
        INTO :h_amount, :h_merch, :h_oldfee
        FROM ac_ledger
        WHERE key = :h_key;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0012] 원장 없음 key=%s", key);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("AC_OL_0012 ac_ledger select");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    if (has_newrate) {
        h_rate = newrate;
    } else {
        EXEC SQL SELECT fee_rate
            INTO :h_rate
            FROM merchant
            WHERE merch_id = :h_merch;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
            tx_log(TX_LOG_WARN, "[AC_OL_0012] 가맹점 요율 없음 merch=%s", h_merch);
            tx_return(ctx, TX_ENOENT, ctx->out);
            return;
        }
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("AC_OL_0012 merchant select");
            tx_return(ctx, TX_EDB, ctx->out);
            return;
        }
    }

    h_newfee = (h_amount * h_rate) / 10000;

    EXEC SQL UPDATE ac_ledger
        SET fee = :h_newfee, upd_ts = now()
        WHERE key = :h_key;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("AC_OL_0012 ac_ledger update");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (sqlca.sqlerrd[2] == 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0012] 수수료 갱신대상 없음 key=%s", key);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_setlong(ctx->out, "RATE", h_rate);
    tx_buf_setlong(ctx->out, "OLDFEE", h_oldfee);
    tx_buf_setlong(ctx->out, "NEWFEE", h_newfee);
    tx_log(TX_LOG_INFO, "[AC_OL_0012] 수수료조정 완료 key=%s old=%ld new=%ld rate=%ld",
           key, h_oldfee, h_newfee, h_rate);
    tx_return(ctx, TX_OK, ctx->out);
}