import net.knarcraft.serverlauncher.server.*;

import javax.naming.ConfigurationException;
import java.io.*;
import java.lang.Runtime;
import java.util.ArrayList;
import java.util.Scanner;
//Java 9 required.

/**
 * A software for managing Minecraft servers.
 * @author Kristian Knarvik
 */
public class Main {
	private static ArrayList<Server> servers = new ArrayList<>();
	private static ArrayList<ServerType> serverTypes = new ArrayList<>();

	public static void main(String[] args) {
		try {
			loadServerTypes();
		} catch (ConfigurationException e) {
			e.printStackTrace();
			System.exit(1);
		}
	}

	// TODO: Add gui

	/**
	 * Adds all the valid server types and versions.
	 */
	private static void loadServerTypes() throws ConfigurationException {
		try (Scanner in = new Scanner(new File("config/servertypes.csv"))) {
			while (in.hasNextLine()) {
				String[] str = in.nextLine().split(";", -1);
				int len = str.length;
				String[] ver;
				if (str[1].contains(",")) {
					ver = str[1].split(",", -1);
				} else {
					ver = new String[]{str[1]};
				}
				if (len == 7) {
					serverTypes.add(new AdvancedServerType(str[0], ver, str[2], str[3], str[4], str[5], str[6]));
				} else if (len == 3) {
					serverTypes.add(new ServerType(str[0], ver, str[2]));
				} else {
					throw new ConfigurationException("Error: Configuration file invalid.");
				}
			}
		} catch (FileNotFoundException e) {
			throw new ConfigurationException("Error: Configuration file not found.");
		} catch (ArrayIndexOutOfBoundsException e) {
			throw new ConfigurationException("Error: Configuration file invalid.");
		}
	}

	/**
	 * Runs all enabled servers with their settings.
	 */
	public static void startServers() {
		//This should update the server status to running. The output should display in a custom commandline interface.
		for (Server server : servers) {
			if (server.isEnabled()) {
				String path = server.getPath();
				String type = server.getType();
				try {
                    server.downloadJar();
                } catch (FileNotFoundException e) {
					System.out.println("File was not found.");
					return;
				}
				String ram = server.maxRam();
				Runtime rt = Runtime.getRuntime();
				try {
					Process pr = rt.exec("java -Xmx" + ram + " -Xms512M -jar " + "\"" + path + "\\" + type + "\" nogui");
					long pid = pr.pid();
					server.updatePid(pid);
					System.out.println("Success");
				} catch (IOException e) {
					System.out.println("Error");
				}
			}
		}
	}
}