/* @tier medium @module ac @transform acquire-online */
/*
 * ac_ol_0020.pgc - 매입 온라인 서비스 (AC_OL_0020)  [tier=medium]
 *
 * 매입금액 보정: 지정 보정액(DELTA)만큼 매입금액을 가감하고, 가맹점
 * 수수료율로 수수료를 재계산하여 반영한다.
 */
#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_0020, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char   h_key[16];
    char   h_merch_id[16];
    long   h_amount;
    long   h_fee;
    long   h_new_amount;
    long   h_new_fee;
    double h_fee_rate;
    EXEC SQL END DECLARE SECTION;

    char key[16];
    long delta = 0;

    tx_log(TX_LOG_INFO, "[AC_OL_0020] 매입금액 보정 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0020] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (tx_buf_getlong(ctx->in, "DELTA", &delta) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0020] DELTA 누락 key=%s", key);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

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

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

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0020] 매입 원장 없음 key=%s", key);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT ac_ledger amount/fee");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    h_new_amount = h_amount + delta;
    if (!amount_is_valid(h_new_amount)) {
        tx_log(TX_LOG_WARN,
               "[AC_OL_0020] 보정후 금액 유효성 오류 key=%s delta=%ld amount=%ld",
               key, delta, h_new_amount);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    EXEC SQL SELECT fee_rate
        INTO :h_fee_rate
        FROM merchant
        WHERE merch_id = :h_merch_id;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0020] 가맹점 정보 없음 merch=%s", h_merch_id);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT merchant fee_rate");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    h_new_fee = (long)(h_new_amount * h_fee_rate);
    if (h_new_fee < 0)
        h_new_fee = 0;

    if (tx_begin() != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0020] 트랜잭션 시작 실패");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    EXEC SQL UPDATE ac_ledger
        SET amount = :h_new_amount, fee = :h_new_fee
        WHERE key = :h_key;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("UPDATE ac_ledger amount/fee");
        tx_abort();
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (sqlca.sqlerrd[2] == 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0020] 보정대상 없음 key=%s", key);
        tx_abort();
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    tx_commit();

    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, "OLDAMOUNT", h_amount);
    tx_buf_setlong(ctx->out, "NEWAMOUNT", h_new_amount);
    tx_buf_setlong(ctx->out, "OLDFEE", h_fee);
    tx_buf_setlong(ctx->out, "NEWFEE", h_new_fee);

    tx_log(TX_LOG_INFO,
           "[AC_OL_0020] 완료 key=%s amount %ld->%ld fee %ld->%ld",
           key, h_amount, h_new_amount, h_fee, h_new_fee);
    tx_return(ctx, TX_OK, ctx->out);
}