//#! /usr/bin/java --source 17 @/usr/local/etc/freed/pid1/jvm.args

import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.TreeMap;

import org.argeo.init.Service;

import jdk.jshell.tool.JavaShellToolBuilder;
import sun.misc.Signal;

class FreedPid1 {
	public static void main(String... args) {
		final long pid = ProcessHandle.current().pid();
		System.out.println("FREEd Init daemon starting with pid " + pid + "...");
//		System.out.println(System.getProperty("user.dir"));
//		System.out.println(System.getProperty("user.name"));
//		System.out.println(System.getProperty("user.home"));

		// System.setProperty("user.dir", "/tmp");
		for (Object key : new TreeMap<>(System.getProperties()).keySet()) {
			System.out.println(key + "=" + System.getProperty(key.toString()));
		}

		System.out.flush();

		Signal.handle(new Signal("TERM"), (signal) -> {
			System.out.println("SIGTERM caught");
			System.exit(0);
		});
		Signal.handle(new Signal("INT"), (signal) -> {
			System.out.println("SIGINT caught");
			System.exit(0);
		});
		Signal.handle(new Signal("HUP"), (signal) -> {
			System.out.println("SIGHUP caught");
			System.exit(0);
		});

		if (args.length > 0 && ("1".equals(args[0]) //
				|| "single".equals(args[0]) //
				|| "emergency".equals(args[0]))) {
			// TODO check if we can remove dependency to management
			String classpath = ManagementFactory.getRuntimeMXBean().getClassPath();
			String feedbackMode = "concise";
			// TODO --startup script
			JavaShellToolBuilder builder = JavaShellToolBuilder.builder();
			try {
				builder.start("--execution", "direct", "--class-path", classpath, "--feedback", feedbackMode);
			} catch (Exception e) {
				e.printStackTrace();
				System.err.flush();
				System.exit(1);
				return;
			}

		} else {
			// init Linux services
			initSysctl();
			startInitDService("networking");
			startInitDService("nslcd");

			waitForNetwork();

			// init Argeo CMS
			Service.main(args);
		}
	}

	static void initSysctl() {
		try {
			Path sysctlD = Paths.get("/etc/sysctl.d/");
			for (Path conf : Files.newDirectoryStream(sysctlD, "*.conf")) {
				try {
					new ProcessBuilder("/usr/sbin/sysctl", "-p", conf.toString()).start();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	static void startInitDService(String serviceName) {
		Path serviceInit = Paths.get("/etc/init.d/", serviceName);
		if (Files.exists(serviceInit))
			try {
				new ProcessBuilder(serviceInit.toString(), "start").start().waitFor();
				System.out.println("Service " + serviceName + " started");
				Runtime.getRuntime().addShutdownHook(new Thread(() -> {
					try {
						new ProcessBuilder(serviceInit.toString(), "stop").start().waitFor();
					} catch (IOException | InterruptedException e) {
						e.printStackTrace();
					}
				}, "Stop service " + serviceName));
			} catch (IOException | InterruptedException e) {
				e.printStackTrace();
			}
		else
			System.out.println("Service " + serviceName + " not found and therefore not started");
	}

	static void waitForNetwork() {
		// TODO Do it properly
		try {
			Thread.sleep(1000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
}