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/**
 * MIT License
 *
 * Copyright (c) 2010 - 2020 The OSHI Project Contributors: https://github.com/oshi/oshi/graphs/contributors
 *
 * 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, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * 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 oshi.hardware.platform.mac;

import static oshi.util.Memoizer.memoize;

import java.nio.charset.StandardCharsets;
import java.util.function.Supplier;

import com.sun.jna.platform.mac.IOKit.IORegistryEntry; // NOSONAR squid:S1191
import com.sun.jna.platform.mac.IOKitUtil;

import oshi.annotation.concurrent.Immutable;
import oshi.hardware.Baseboard;
import oshi.hardware.Firmware;
import oshi.hardware.common.AbstractComputerSystem;
import oshi.util.Constants;
import oshi.util.Util;
import oshi.util.tuples.Triplet;

/**
 * Hardware data obtained from ioreg.
 */
@Immutable
final class MacComputerSystem extends AbstractComputerSystem {

    private final Supplier> manufacturerModelSerial = memoize(
            MacComputerSystem::platformExpert);

    @Override
    public String getManufacturer() {
        return manufacturerModelSerial.get().getA();
    }

    @Override
    public String getModel() {
        return manufacturerModelSerial.get().getB();
    }

    @Override
    public String getSerialNumber() {
        return manufacturerModelSerial.get().getC();
    }

    @Override
    public Firmware createFirmware() {
        return new MacFirmware();
    }

    @Override
    public Baseboard createBaseboard() {
        return new MacBaseboard();
    }

    private static Triplet platformExpert() {
        String manufacturer = null;
        String model = null;
        String serialNumber = null;
        IORegistryEntry platformExpert = IOKitUtil.getMatchingService("IOPlatformExpertDevice");
        if (platformExpert != null) {
            byte[] data = platformExpert.getByteArrayProperty("manufacturer");
            if (data != null) {
                manufacturer = new String(data, StandardCharsets.UTF_8).trim();
            }
            data = platformExpert.getByteArrayProperty("model");
            if (data != null) {
                model = new String(data, StandardCharsets.UTF_8).trim();
            }
            serialNumber = platformExpert.getStringProperty("IOPlatformSerialNumber");
            platformExpert.release();
        }
        return new Triplet<>(Util.isBlank(manufacturer) ? "Apple Inc." : manufacturer,
                Util.isBlank(model) ? Constants.UNKNOWN : model,
                Util.isBlank(serialNumber) ? Constants.UNKNOWN : serialNumber);
    }
}