/*
 * ============LICENSE_START=======================================================
 * PROJECT
 * ================================================================================
 * Copyright (C) 2020 Nokia. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.onap.aaf.certservice.certification.configuration;

import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.File;
import java.io.IOException;
import java.security.InvalidParameterException;
import java.util.List;

import org.onap.aaf.certservice.certification.configuration.model.CmpServers;
import org.onap.aaf.certservice.certification.configuration.model.Cmpv2Server;
import org.onap.aaf.certservice.certification.configuration.validation.Cmpv2ServersConfigurationValidator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
class CmpServersConfigLoader {

    private static final String LOADING_EXCEPTION_MESSAGE = "Exception occurred during CMP Servers configuration loading";
    private static final String VALIDATION_EXCEPTION_MESSAGE = "Validation of CMPv2 servers configuration failed";

    private final Cmpv2ServersConfigurationValidator validator;

    @Autowired
    CmpServersConfigLoader(Cmpv2ServersConfigurationValidator validator) {
        this.validator = validator;
    }

    List<Cmpv2Server> load(String path) throws CmpServersConfigLoadingException {
        try {
            List<Cmpv2Server> servers = loadConfigFromFile(path).getCmpv2Servers();
            validator.validate(servers);
            return servers;
        } catch (IOException e) {
            throw new CmpServersConfigLoadingException(LOADING_EXCEPTION_MESSAGE, e);
        } catch (InvalidParameterException e) {
            throw new CmpServersConfigLoadingException(VALIDATION_EXCEPTION_MESSAGE, e);
        }
    }

    private CmpServers loadConfigFromFile(String path) throws IOException {
        ObjectMapper objectMapper = new ObjectMapper();
        return objectMapper.readValue(new File(path), CmpServers.class);
    }
}