/*
 * Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.amazonaws.samples.kinesisanalytics.flink.streaming.etl.utils;

import com.amazonaws.services.kinesisanalytics.runtime.KinesisAnalyticsRuntime;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.apache.flink.api.java.utils.ParameterTool;

public class ParameterToolUtils {
    public static ParameterTool fromApplicationProperties(Properties properties) {
        Map<String, String> map = new HashMap<>(properties.size());

        properties.forEach((k, v) -> map.put((String) k, (String) v));

        return ParameterTool.fromMap(map);
    }

    public static ParameterTool fromArgsAndApplicationProperties(String[] args) throws IOException {
        //read parameters from command line arguments (for debugging)
        ParameterTool parameter = ParameterTool.fromArgs(args);

        //read the parameters from the Kinesis Analytics environment
        Map<String, Properties> applicationProperties = KinesisAnalyticsRuntime.getApplicationProperties();

        Properties flinkProperties = applicationProperties.get("FlinkApplicationProperties");

        if (flinkProperties != null) {
            parameter = parameter.mergeWith(ParameterToolUtils.fromApplicationProperties(flinkProperties));
        }

        return parameter;
    }
}