/*
 * Copyright 2012 - 2024 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 com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.ProvisionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.broadcast.BroadcastService;
import org.traccar.schedule.ScheduleManager;
import org.traccar.storage.DatabaseModule;
import org.traccar.web.WebModule;
import org.traccar.web.WebServer;

import java.io.File;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.OperatingSystemMXBean;
import java.lang.management.RuntimeMXBean;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

public final class Main {

    private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);

    private static Injector injector;

    public static Injector getInjector() {
        return injector;
    }

    private Main() {
    }

    public static void logSystemInfo() {
        try {
            OperatingSystemMXBean operatingSystemBean = ManagementFactory.getOperatingSystemMXBean();
            LOGGER.info(
                    "Operating system name: {} version: {} architecture: {}",
                    operatingSystemBean.getName(), operatingSystemBean.getVersion(), operatingSystemBean.getArch());

            RuntimeMXBean runtimeBean = ManagementFactory.getRuntimeMXBean();
            LOGGER.info(
                    "Java runtime name: {} vendor: {} version: {}",
                    runtimeBean.getVmName(), runtimeBean.getVmVendor(), runtimeBean.getVmVersion());

            MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();
            LOGGER.info(
                    "Memory limit heap: {}mb non-heap: {}mb",
                    memoryBean.getHeapMemoryUsage().getMax() / (1024 * 1024),
                    memoryBean.getNonHeapMemoryUsage().getMax() / (1024 * 1024));

            LOGGER.info("Character encoding: {}", Charset.defaultCharset().displayName());

        } catch (Exception error) {
            LOGGER.warn("Failed to get system info");
        }
    }

    public static void main(String[] args) throws Exception {
        Locale.setDefault(Locale.ENGLISH);

        final String configFile;
        if (args.length <= 0) {
            configFile = "./debug.xml";
            if (!new File(configFile).exists()) {
                throw new RuntimeException("Configuration file is not provided");
            }
        } else {
            configFile = args[args.length - 1];
        }

        if (args.length > 0 && args[0].startsWith("--")) {
            WindowsService windowsService = new WindowsService("traccar") {
                @Override
                public void run() {
                    Main.run(configFile);
                }
            };
            switch (args[0]) {
                case "--install":
                    windowsService.install("traccar", null, null, null, null, configFile);
                    return;
                case "--uninstall":
                    windowsService.uninstall();
                    return;
                case "--service":
                default:
                    windowsService.init();
                    break;
            }
        } else {
            run(configFile);
        }
    }

    public static void run(String configFile) {
        try {
            injector = Guice.createInjector(new MainModule(configFile), new DatabaseModule(), new WebModule());
            logSystemInfo();
            LOGGER.info("Version: {}", Main.class.getPackage().getImplementationVersion());
            LOGGER.info("Starting server...");

            var services = new ArrayList<LifecycleObject>();
            for (var clazz : List.of(
                    ScheduleManager.class, ServerManager.class, WebServer.class, BroadcastService.class)) {
                var service = injector.getInstance(clazz);
                if (service != null) {
                    service.start();
                    services.add(service);
                }
            }

            Thread.setDefaultUncaughtExceptionHandler((t, e) -> LOGGER.error("Thread exception", e));

            Runtime.getRuntime().addShutdownHook(new Thread(() -> {
                LOGGER.info("Stopping server...");

                for (var service : services) {
                    try {
                        service.stop();
                    } catch (Exception e) {
                        throw new RuntimeException(e);
                    }
                }
            }));
        } catch (Exception e) {
            Throwable unwrapped;
            if (e instanceof ProvisionException) {
                unwrapped = e.getCause();
            } else {
                unwrapped = e;
            }
            LOGGER.error("Main method error", unwrapped);
            System.exit(1);
        }
    }

}