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/*
 * Copyright 2023 Greptime Team
 *
 * 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 io.greptime.common.util;

import io.greptime.common.Keys;
import java.util.Locale;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Platform utilities.
 */
public class Platform {

    private static final Logger LOG = LoggerFactory.getLogger(Platform.class);

    private static final String WIN_KEY = "win";
    private static final String MAC_KEY = "mac os x";

    private static final boolean IS_WINDOWS = isWindows0();
    private static final boolean IS_MAC = isMac0();

    /**
     * Return {@code true} if the JVM is running on Windows
     */
    public static boolean isWindows() {
        return IS_WINDOWS;
    }

    /**
     * Return {@code true} if the JVM is running on Mac OSX
     */
    @SuppressWarnings("unused")
    public static boolean isMac() {
        return IS_MAC;
    }

    private static boolean isMac0() {
        boolean mac = checkOS(MAC_KEY);
        if (mac) {
            LOG.debug("Platform: Mac OS X");
        }
        return mac;
    }

    private static boolean isWindows0() {
        boolean windows = checkOS(WIN_KEY);
        if (windows) {
            LOG.debug("Platform: Windows");
        }
        return windows;
    }

    private static boolean checkOS(String osKey) {
        return SystemPropertyUtil.get(Keys.OS_NAME, "").toLowerCase(Locale.US).contains(osKey);
    }
}