package net.minecraft.launcher.authentication;

import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import net.minecraft.launcher.Http;
import net.minecraft.launcher.Launcher;
import net.minecraft.launcher.LauncherConstants;
import net.minecraft.launcher.authentication.exceptions.AuthenticationException;
import net.minecraft.launcher.authentication.exceptions.InvalidCredentialsException;
import org.apache.commons.lang3.StringUtils;

public class LegacyAuthenticationService extends BaseAuthenticationService
{
  private static final URL AUTHENTICATION_URL = LauncherConstants.constantURL("https://login.minecraft.net");
  private static final int AUTHENTICATION_VERSION = 14;
  private static final int RESPONSE_PART_PROFILE_NAME = 2;
  private static final int RESPONSE_PART_SESSION_TOKEN = 3;
  private static final int RESPONSE_PART_PROFILE_ID = 4;
  private String sessionToken = null;

  public void logIn() throws AuthenticationException
  {
    if (StringUtils.isBlank(getUsername())) {
      throw new InvalidCredentialsException("Invalid username");
    }
    if (StringUtils.isBlank(getPassword())) {
      throw new InvalidCredentialsException("Invalid password"); } 
Map args = new HashMap();
    args.put("user", getUsername());
    args.put("password", getPassword());
    args.put("version", Integer.valueOf(14));
    String response;
    try { response = Http.performPost(AUTHENTICATION_URL, args, Launcher.getInstance().getProxy()).trim();
    } catch (IOException e) {
      throw new AuthenticationException("Authentication server is not responding", e);
    }

    String[] split = response.split(":");

    if (split.length == 5) {
      String profileId = split[4];
      String profileName = split[2];
      String sessionToken = split[3];

      if ((StringUtils.isBlank(profileId)) || (StringUtils.isBlank(profileName)) || (StringUtils.isBlank(sessionToken))) {
        throw new AuthenticationException("Unknown response from authentication server: " + response);
      }

      setSelectedProfile(new GameProfile(profileId, profileName));
      this.sessionToken = sessionToken;
      fireAuthenticationChangedEvent();
    } else {
      throw new InvalidCredentialsException(response);
    }
  }

  public void logOut()
  {
    super.logOut();
    this.sessionToken = null;
    fireAuthenticationChangedEvent();
  }

  public GameProfile[] getAvailableProfiles()
  {
    if (getSelectedProfile() != null) {
      return new GameProfile[] { getSelectedProfile() };
    }
    return new GameProfile[0];
  }

  public void selectGameProfile(GameProfile profile)
    throws AuthenticationException
  {
    throw new UnsupportedOperationException("Game profiles cannot be changed in the legacy authentication service");
  }

  public String getSessionToken()
  {
    return this.sessionToken;
  }
}