/*
 * Copyright 2020 Amazon.com, Inc. or its affiliates. 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.
 * A copy of the License is located at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * or in the "license" file accompanying this file. This file 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 com.amazon.aoc.helpers;

import com.amazon.aoc.models.ValidationConfig;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import java.io.IOException;
import java.net.URL;
import java.util.List;
import lombok.extern.log4j.Log4j2;
import org.apache.commons.io.IOUtils;

@Log4j2
public class ConfigLoadHelper {
  /**
   * load validation config from file, the base path is the resource path.
   *
   * @param filePath the relative path under /resources/validations/
   * @return a list of validationconfig object
   * @throws IOException when the filepath is not existed
   */
  public List<ValidationConfig> loadConfigFromFile(String filePath) throws IOException {
    // todo support filepath which is not in the resource folder

    ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
    List<ValidationConfig> validationConfigList =
        mapper.readValue(
            IOUtils.toString(getResourcePath(filePath)),
            new TypeReference<List<ValidationConfig>>() {});
    return validationConfigList;
  }

  private URL getResourcePath(String filePath) {
    return getClass().getResource("/validations/" + filePath);
  }
}