package net.minecraft;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class Util {
	private enum OS {
		linux, solaris, windows, macos, unknown
	}

	private static File workDir = null;

	public static File getWorkingDirectory() {
		if (workDir == null) workDir = getWorkingDirectory("minecraft");
		return workDir;
	}

	public static File getWorkingDirectory(String applicationName) {
		File workingDirectory;
		String applicationData, userHome = System.getProperty("user.home", ".");

		switch (getPlatform()) {
			case solaris:
				workingDirectory = new File(userHome, '.' + applicationName + '/');
				break;
			case windows:
				applicationData = System.getenv("APPDATA");
				if (applicationData != null) {
					workingDirectory = new File(applicationData, "." + applicationName + '/');
					break;
				}
				workingDirectory = new File(userHome, '.' + applicationName + '/');
				break;
			case macos:
				workingDirectory = new File(userHome, "Library/Application Support/" + applicationName);
				break;
			default:
				workingDirectory = new File(userHome, String.valueOf(applicationName) + '/');
				break;
		}
		if (!workingDirectory.exists() && !workingDirectory.mkdirs())
			throw new RuntimeException("The working directory could not be created: " + workingDirectory);
		return workingDirectory;
	}

	private static OS getPlatform() {
		String osName = System.getProperty("os.name").toLowerCase();
		if (osName.contains("win")) return OS.windows;
		if (osName.contains("mac")) return OS.macos;
		if (osName.contains("solaris")) return OS.solaris;
		if (osName.contains("sunos")) return OS.solaris;
		if (osName.contains("linux")) return OS.linux;
		if (osName.contains("unix")) return OS.linux;
		return OS.unknown;
	}

	public static String makeDummyAuthString(String userName) {
		String latestVersion = "-1";
		String downloadTicket = "none";
		String sessionId = "none";
		return String.join(":", latestVersion, downloadTicket, userName, sessionId);
	}

	public static String excutePost(String targetURL, String urlParameters) {
		HttpURLConnection connection = null;

		try {
			URL url = new URL(targetURL);
			connection = (HttpURLConnection) url.openConnection();
			connection.setRequestMethod("POST");
			connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

			connection.setRequestProperty("Content-Length", Integer.toString((urlParameters.getBytes()).length));
			connection.setRequestProperty("Content-Language", "en-US");

			connection.setUseCaches(false);
			connection.setDoInput(true);
			connection.setDoOutput(true);


			DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
			wr.writeBytes(urlParameters);
			wr.flush();
			wr.close();


			InputStream is = connection.getInputStream();
			BufferedReader rd = new BufferedReader(new InputStreamReader(is));

			StringBuffer response = new StringBuffer();
			String line;
			while ((line = rd.readLine()) != null) {
				response.append(line);
				response.append('\r');
			}
			rd.close();
			return response.toString();
		} catch (Exception e) {

			e.printStackTrace();
			return null;
		} finally {

			if (connection != null)
				connection.disconnect();
		}
	}
}