/**
 * 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.apache.flink.streaming.connectors.pulsar.testutils;

import org.apache.flink.table.client.config.Environment;
import org.apache.flink.util.FileUtils;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Map;
import java.util.Objects;

/**
 * Utilities for reading an environment file.
 */
public final class EnvironmentFileUtil {

    private EnvironmentFileUtil() {
        // private
    }

    public static Environment parseUnmodified(String fileName) throws IOException {
        final URL url = EnvironmentFileUtil.class.getClassLoader().getResource(fileName);
        Objects.requireNonNull(url);
        return Environment.parse(url);
    }

    public static Environment parseModified(String fileName, Map<String, String> replaceVars) throws IOException {
        final URL url = EnvironmentFileUtil.class.getClassLoader().getResource(fileName);
        Objects.requireNonNull(url);
        String schema = FileUtils.readFileUtf8(new File(url.getFile()));

        for (Map.Entry<String, String> replaceVar : replaceVars.entrySet()) {
            schema = schema.replace(replaceVar.getKey(), replaceVar.getValue());
        }

        return Environment.parse(schema);
    }
}