/*
 * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
 *
 * 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.traccar;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class Config {

    private final Properties properties = new Properties();
    private Properties defaultProperties;

    public void load(String file) throws IOException {
        try (InputStream inputStream = new FileInputStream(file)) {
            properties.loadFromXML(inputStream);
        }

        String defaultConfigFile = properties.getProperty("config.default");
        if (defaultConfigFile != null) {
            try (InputStream inputStream = new FileInputStream(defaultConfigFile)) {
                defaultProperties = new Properties();
                defaultProperties.loadFromXML(inputStream);
            }
        }
    }

    public boolean hasKey(String key) {
        return properties.containsKey(key) || defaultProperties != null && defaultProperties.containsKey(key);
    }

    public String getString(String key) {
        if (properties.containsKey(key) || defaultProperties == null) {
            return properties.getProperty(key);
        } else {
            return defaultProperties.getProperty(key);
        }
    }

    public String getString(String key, String defaultValue) {
        if (hasKey(key)) {
            return getString(key);
        } else {
            return defaultValue;
        }
    }

    public boolean getBoolean(String key) {
        return Boolean.parseBoolean(getString(key));
    }

    public int getInteger(String key) {
        return getInteger(key, 0);
    }

    public int getInteger(String key, int defaultValue) {
        if (hasKey(key)) {
            return Integer.parseInt(getString(key));
        } else {
            return defaultValue;
        }
    }

    public long getLong(String key) {
        return getLong(key, 0);
    }

    public long getLong(String key, long defaultValue) {
        if (hasKey(key)) {
            return Long.parseLong(getString(key));
        } else {
            return defaultValue;
        }
    }

    public double getDouble(String key) {
        return getDouble(key, 0.0);
    }

    public double getDouble(String key, double defaultValue) {
        if (hasKey(key)) {
            return Double.parseDouble(getString(key));
        } else {
            return defaultValue;
        }
    }

}