/**
 * Copyright © 2016-2018 The Thingsboard Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.thingsboard.server.service.security;

import com.google.common.util.concurrent.FutureCallback;
import org.thingsboard.server.service.telemetry.exception.AccessDeniedException;
import org.thingsboard.server.service.telemetry.exception.EntityNotFoundException;
import org.thingsboard.server.service.telemetry.exception.InternalErrorException;
import org.thingsboard.server.service.telemetry.exception.UnauthorizedException;

/**
 * Created by ashvayka on 31.03.18.
 */
public class ValidationCallback<T> implements FutureCallback<ValidationResult> {

    private final T response;
    private final FutureCallback<T> action;

    public ValidationCallback(T response, FutureCallback<T> action) {
        this.response = response;
        this.action = action;
    }

    @Override
    public void onSuccess(ValidationResult result) {
        if (result.getResultCode() == ValidationResultCode.OK) {
            action.onSuccess(response);
        } else {
            onFailure(getException(result));
        }
    }

    @Override
    public void onFailure(Throwable e) {
        action.onFailure(e);
    }

    public static Exception getException(ValidationResult result) {
        ValidationResultCode resultCode = result.getResultCode();
        Exception e;
        switch (resultCode) {
            case ENTITY_NOT_FOUND:
                e = new EntityNotFoundException(result.getMessage());
                break;
            case UNAUTHORIZED:
                e = new UnauthorizedException(result.getMessage());
                break;
            case ACCESS_DENIED:
                e = new AccessDeniedException(result.getMessage());
                break;
            case INTERNAL_ERROR:
                e = new InternalErrorException(result.getMessage());
                break;
            default:
                e = new UnauthorizedException("Permission denied.");
                break;
        }
        return e;
    }

}
