package de.tudarmstadt.informatik.hostage.ui2.fragment;

import com.google.android.gms.analytics.HitBuilders;
import com.google.android.gms.analytics.Tracker;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.content.LocalBroadcastManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.Switch;
import android.widget.TextView;

import de.tudarmstadt.informatik.hostage.Hostage;
import de.tudarmstadt.informatik.hostage.HostageApplication;
import de.tudarmstadt.informatik.hostage.R;
import de.tudarmstadt.informatik.hostage.commons.HelperUtils;
import de.tudarmstadt.informatik.hostage.persistence.ProfileManager;
import de.tudarmstadt.informatik.hostage.model.Profile;
import de.tudarmstadt.informatik.hostage.persistence.HostageDBOpenHelper;
import de.tudarmstadt.informatik.hostage.ui2.model.LogFilter;
import de.tudarmstadt.informatik.hostage.ui2.activity.MainActivity;
import de.tudarmstadt.informatik.hostage.ui2.fragment.opengl.ThreatIndicatorGLRenderer;
import de.tudarmstadt.informatik.hostage.system.Device;

/**
 * This fragments displays the current hostage state and attacks on the device in form of an animation and simple view components
 *
 * @author Alexander Brakowski
 * @created 13.01.14 19:06
 */

public class HomeFragment extends TrackerFragment {

	/**
	 * View objects from the layout
	 */
	private Switch mHomeSwitchConnection;
	private TextView mHomeTextName;
	private TextView mHomeTextSecurity;
	private TextView mHomeTextAttacks;
	private TextView mHomeTextProfile;
	private TextView mHomeTextProfileHeader;
	private ImageView mHomeProfileImage;
	private ImageView mHomeConnectionInfoButton;
	private View mRootView;

	/**
	 * This handles all the broadcasts from the Hostage service
	 */
	private BroadcastReceiver mReceiver;

	/**
	 * A change listener for the monitor switch
	 */
	private CompoundButton.OnCheckedChangeListener mSwitchChangeListener = null;


	private int mDefaultTextColor;

	/**
	 * A reference to the profile manager
	 */
	private ProfileManager mProfileManager;

	/**
	 * A shared preference that holds all the connection info of the current network connection
	 */
	private SharedPreferences mConnectionInfo;

    /**
     * Hold the shared preferences for the app
     */
    private SharedPreferences mSharedPreferences;

	/**
	 * An Helper to access the sqllite database with all the records
	 */
	private HostageDBOpenHelper mDbHelper;

	/**
	 * Holds a state if the broadcast receiver is registered to the hostage service
 	 */
	private boolean mReceiverRegistered;

	/**
	 * Holds a state if the hostage service is active
	 */
	private boolean isActive = false;

	/**
	 * Holds a state if the device is currently connected to a network
	 */
	private boolean isConnected = false;

	public HomeFragment() {
	}

	/**
	 * Looks up all the neccessary views in the layout
	 */
	private void assignViews() {
		mHomeSwitchConnection = (Switch) mRootView.findViewById(R.id.home_switch_connection);
		mHomeTextName = (TextView) mRootView.findViewById(R.id.home_text_name);
		mHomeTextSecurity = (TextView) mRootView.findViewById(R.id.home_text_security);
		mHomeTextAttacks = (TextView) mRootView.findViewById(R.id.home_text_attacks);
		mHomeTextProfile = (TextView) mRootView.findViewById(R.id.home_text_profile);
		mHomeTextProfileHeader = (TextView) mRootView.findViewById(R.id.home_text_profile_header);
		mHomeProfileImage = (ImageView) mRootView.findViewById(R.id.home_image_profile);
		mHomeConnectionInfoButton = (ImageView) mRootView.findViewById(R.id.home_button_connection_info);
	}

	/**
	 * Registers the broadcast receiver with the hostage service
	 */
	private void registerBroadcastReceiver() {
		if (!mReceiverRegistered) {
			LocalBroadcastManager.getInstance(getActivity()).registerReceiver(mReceiver, new IntentFilter(getString(R.string.broadcast)));
			this.mReceiverRegistered = true;
		}
	}

	/**
	 * Unregisters the broadcast receiver
	 */
	private void unregisterBroadcastReceiver() {
		if (mReceiverRegistered) {
			LocalBroadcastManager.getInstance(getActivity()).unregisterReceiver(mReceiver);
			this.mReceiverRegistered = false;
		}
	}

	/**
	 * Sets the view state to not active.
	 * This means hiding and graying out all the informations in the view, that are not important, if the service is not active.
	 *
	 * @param initial indicates that the method was called on creation of view
	 */
	public void setStateNotActive(boolean initial) {
		mHomeTextName.setTextColor(getResources().getColor(R.color.light_grey));
		mHomeTextSecurity.setTextColor(getResources().getColor(R.color.light_grey));
		mHomeTextAttacks.setTextColor(getResources().getColor(R.color.light_grey));
		mHomeTextProfile.setTextColor(getResources().getColor(R.color.light_grey));
		mHomeTextProfileHeader.setTextColor(getResources().getColor(R.color.light_grey));

		if (!initial) {
			ThreatIndicatorGLRenderer.setThreatLevel(ThreatIndicatorGLRenderer.ThreatLevel.NOT_MONITORING);
		}

		mHomeSwitchConnection.setChecked(false);
		isActive = false;
	}

	/**
	 * Alias for calling setStateNotActive with the initial value being false
	 */
	public void setStateNotActive() {
		setStateNotActive(false);
	}

	/**
	 * Alias for calling setStateActive with the initial value being false
	 */
	public void setStateActive() {
		setStateActive(false);
	}

	/**
	 * Sets the state of the view to active.
	 * That means that all the information showing the active state of the hostage service is being displayed.
	 *
	 * @param initial indicates that the method was called on creation of view
	 */
	public void setStateActive(boolean initial) {
		mHomeTextAttacks.setVisibility(View.VISIBLE);
		mHomeTextSecurity.setVisibility(View.VISIBLE);

		mHomeTextName.setTextColor(mDefaultTextColor);
		mHomeTextProfile.setTextColor(mDefaultTextColor);
		mHomeTextProfileHeader.setTextColor(mDefaultTextColor);

		if (!initial) {
			ThreatIndicatorGLRenderer.setThreatLevel(ThreatIndicatorGLRenderer.ThreatLevel.NO_THREAT);
		}

		mHomeSwitchConnection.setChecked(true);
		isActive = true;
	}

	/**
	 * Sets the state of the view to not connected by hiding information about the attacks.
	 */
	public void setStateNotConnected() {
		mHomeTextSecurity.setVisibility(View.INVISIBLE);
		mHomeTextAttacks.setVisibility(View.INVISIBLE);
		mHomeTextProfile.setVisibility(View.INVISIBLE);
		mHomeTextProfileHeader.setVisibility(View.INVISIBLE);
		mHomeProfileImage.setVisibility(View.INVISIBLE);
		mHomeConnectionInfoButton.setVisibility(View.INVISIBLE);

		mHomeTextName.setText(R.string.not_connected);
		isConnected = false;
	}

	/**
	 * Sets the state of the view to connected by showing informations about attacks
	 */
	public void setStateConnected() {
		mHomeTextProfile.setVisibility(View.VISIBLE);
		mHomeTextProfileHeader.setVisibility(View.VISIBLE);
		mHomeProfileImage.setVisibility(View.VISIBLE);
		mHomeConnectionInfoButton.setVisibility(View.VISIBLE);
		isConnected = true;
	}

	/**
	 * Updates the view.
	 *
	 * That means: updating the number of attacks on the view,
	 *             updating the threat level,
	 *             updating the connection state,
	 *             updating the monitoring state
	 */
	public void updateUI() {
		Profile profile = mProfileManager.getCurrentActivatedProfile();
		if (profile != null) {
			mHomeTextProfile.setText(profile.mLabel);
			mHomeProfileImage.setImageBitmap(profile.getIconBitmap());
		}

		// if the device is connected to an network display the network name
        //SK: Temporary Bugfix
		//if (HelperUtils.isNetworkAvailable(getActivity())) {
        if (HelperUtils.isWifiConnected(getActivity())) {
			setStateConnected();
			String ssid = mConnectionInfo.getString(getString(R.string.connection_info_ssid), "\"\"");
			mHomeTextName.setText(ssid.substring(1,ssid.length() - 1));
		} else {
			setStateNotConnected();
		}

		boolean hasActiveListeners = false;
		int totalAttacks = mDbHelper.numBssidSeen(mConnectionInfo.getString(getString(R.string.connection_info_bssid), null));
		ThreatIndicatorGLRenderer.ThreatLevel threatLevel = ThreatIndicatorGLRenderer.ThreatLevel.NOT_MONITORING;

		// decides which threat level to display
		if (MainActivity.getInstance().getHostageService() != null) {
			if (MainActivity.getInstance().getHostageService().hasRunningListeners()) {
				hasActiveListeners = true;

				if (MainActivity.getInstance().getHostageService().hasActiveAttacks() && totalAttacks > 0) {
					threatLevel = ThreatIndicatorGLRenderer.ThreatLevel.LIVE_THREAT;
				} else if (totalAttacks > 0) {
					threatLevel = ThreatIndicatorGLRenderer.ThreatLevel.PAST_THREAT;
				} else {
					threatLevel = ThreatIndicatorGLRenderer.ThreatLevel.NO_THREAT;
				}
			}
		}

		// if the monitoring is running show the information
		if (hasActiveListeners) {
			setStateActive(true);

			if(!isConnected){
				ThreatIndicatorGLRenderer.setThreatLevel(ThreatIndicatorGLRenderer.ThreatLevel.NO_THREAT);
				mHomeTextAttacks.setText("");
				mHomeTextSecurity.setText("");
			} else {
				switch (threatLevel) {
					case NO_THREAT:
						mHomeTextAttacks.setText(R.string.zero_attacks);
						mHomeTextSecurity.setText(R.string.secure);
						mHomeTextAttacks.setTextColor(getResources().getColor(R.color.holo_dark_green));
						mHomeTextSecurity.setTextColor(getResources().getColor(R.color.holo_dark_green));
						break;
					case PAST_THREAT:
						mHomeTextAttacks.setText(totalAttacks
								+ (totalAttacks == 1 ? getResources().getString(R.string.attack) : getResources().getString(R.string.attacks))
								+ getResources().getString(R.string.recorded));
						mHomeTextSecurity.setText(R.string.insecure);
						mHomeTextAttacks.setTextColor(getResources().getColor(R.color.holo_yellow));
						mHomeTextSecurity.setTextColor(getResources().getColor(R.color.holo_yellow));
						break;
					case LIVE_THREAT:
						mHomeTextAttacks.setText(totalAttacks
								+ (totalAttacks == 1 ? getResources().getString(R.string.attack) : getResources().getString(R.string.attacks))
								+ getResources().getString(R.string.recorded));
						mHomeTextSecurity.setText(R.string.insecure);
						mHomeTextAttacks.setTextColor(getResources().getColor(R.color.holo_red));
						mHomeTextSecurity.setTextColor(getResources().getColor(R.color.holo_red));
						break;
				}

				ThreatIndicatorGLRenderer.setThreatLevel(threatLevel);
			}
		} else {
			setStateNotActive();
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		super.onCreateView(inflater, container, savedInstanceState);

		final Activity activity = getActivity();
		if (activity != null) {
			activity.setTitle(getResources().getString(R.string.drawer_overview));
		}

		mDbHelper = new HostageDBOpenHelper(getActivity());

		mProfileManager = ProfileManager.getInstance();
		mConnectionInfo = getActivity().getSharedPreferences(getString(R.string.connection_info), Context.MODE_PRIVATE);

		mRootView = inflater.inflate(R.layout.fragment_home, container, false);
		assignViews();

		// hook up the connection info button
		mHomeConnectionInfoButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				final FragmentManager fragmentManager = getFragmentManager();
				if (fragmentManager != null) {
					ConnectionInfoDialogFragment connectionInfoDialogFragment = new ConnectionInfoDialogFragment();
					connectionInfoDialogFragment.show(fragmentManager.beginTransaction(), connectionInfoDialogFragment.getTag());
				}
			}
		});

		mDefaultTextColor = mHomeTextName.getCurrentTextColor();

		// sets state and connection initially to off
		setStateNotActive(true);
		setStateNotConnected();

		// register the broadcast receiver
		mReceiver = new BroadcastReceiver() {
			@SuppressLint("NewApi")
			@Override
			public void onReceive(Context context, Intent intent) {
				if (getUserVisibleHint())
					updateUI();
			}
		};
		registerBroadcastReceiver();

		updateUI();

		// connects the switch listener to the switch button
		mHomeSwitchConnection = (Switch) mRootView.findViewById(R.id.home_switch_connection);
		mHomeSwitchConnection.setSaveEnabled(false);

		if (mSwitchChangeListener == null) {
			mSwitchChangeListener = new CompoundButton.OnCheckedChangeListener() {
				public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
					// displays a alert dialog if no network is available

                    //SK: Temporary bugfix to limit to wifi
					//if (!HelperUtils.isNetworkAvailable(getActivity())) {
                    if (!HelperUtils.isWifiConnected(getActivity())) {

						//new AlertDialog.Builder(getActivity()).setTitle(R.string.information).setMessage(R.string.network_not_connected_msg)
                        new AlertDialog.Builder(getActivity()).setTitle(R.string.information).setMessage(R.string.wifi_not_connected_msg)
								.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
									public void onClick(DialogInterface dialog, int which) {

									}
								}).setIcon(android.R.drawable.ic_dialog_info).show();

						setStateNotActive();
						setStateNotConnected();
					} else {
						if (isChecked) {

							boolean protocolActivated = false;

                            mSharedPreferences = getActivity().getSharedPreferences(getString(R.string.shared_preference_path), Hostage.MODE_PRIVATE);


                            if(mSharedPreferences.getBoolean( "isFirstEmulation", true)) {
                                //Notify Porthack is not installed to user
                                if(!Device.isPorthackInstalled()) {
                                    new AlertDialog.Builder(getActivity())
                                            .setTitle(R.string.information)
                                            .setMessage(R.string.no_portbinder_msg2)
                                            .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                                                public void onClick(DialogInterface dialog, int which) {

                                                }
                                            })
                                            .setNegativeButton(R.string.help, new DialogInterface.OnClickListener() {
                                                public void onClick(DialogInterface dialog, int which) {
                                                    MainActivity.getInstance().displayView(MainActivity.MainMenuItem.SETTINGS.getValue());


                                                }
                                            })

                                            .setIcon(android.R.drawable.ic_dialog_info).show();

                                }

                                // Disable hint for 'first' time emulation notification
                                SharedPreferences.Editor editor = mSharedPreferences.edit();
                                editor.putBoolean("isFirstEmulation", false);
                                editor.commit();

                            }

							if (ProfileManager.getInstance().getCurrentActivatedProfile() == null) {
								// starts all services
								MainActivity.getInstance().startMonitorServices(Arrays.asList(getResources().getStringArray(R.array.protocols)));
							} else {
								// starts the services that are actived in the current profile
								ProfileManager profileManager = ProfileManager.getInstance();

								if (profileManager.isRandomActive()) {
									profileManager.randomizeProtocols(profileManager.getRandomProfile());
								}

								Profile currentProfile = profileManager.getCurrentActivatedProfile();
								List<String> protocols = currentProfile.getActiveProtocols();

								if(protocols.size() > 0 || currentProfile.mGhostActive){
									protocols.add("GHOST");
									MainActivity.getInstance().startMonitorServices(protocols);
									protocolActivated = true;
								}
							}

							if (protocolActivated) {
								setStateActive();
							} else {
								// no protocol was started, so show alert dialog
								new AlertDialog.Builder(getActivity()).setTitle(R.string.information).setMessage(R.string.profile_no_services_msg)
										.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
											public void onClick(DialogInterface dialog, int which) {

											}
										}).setIcon(android.R.drawable.ic_dialog_info).show();

								setStateNotActive();
							}
						} else {
							// stop hostage service and all listeners
							if (MainActivity.getInstance().getHostageService() != null) {
								MainActivity.getInstance().getHostageService().stopListeners();
								MainActivity.getInstance().stopAndUnbind();
							}
							setStateNotActive();
						}
					}
				}
			};
		}
		mHomeSwitchConnection.setOnCheckedChangeListener(mSwitchChangeListener);

		// connects the profile text an click listener
		mRootView.findViewById(R.id.home_profile_details).setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				Fragment fragment = new ProfileManagerFragment();
				MainActivity.getInstance().injectFragment(fragment);
			}
		});

		// connect the attacks text to an click listener
		View.OnClickListener attackClickListener = new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				String ssid = mConnectionInfo.getString(getString(R.string.connection_info_ssid), "");
				if (!ssid.isEmpty()) {
					ArrayList<String> ssids = new ArrayList<String>();
					ssids.add(ssid);

					LogFilter filter = new LogFilter();
					filter.setESSIDs(ssids);

					RecordOverviewFragment recordOverviewFragment = new RecordOverviewFragment();
					recordOverviewFragment.setFilter(filter);
					recordOverviewFragment.setGroupKey("ESSID");

					MainActivity.getInstance().injectFragment(recordOverviewFragment);
				}
			}
		};

		mHomeTextAttacks.setOnClickListener(attackClickListener);
		mHomeTextSecurity.setOnClickListener(attackClickListener);

		return mRootView;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void onStop() {
		super.onStop();
		unregisterBroadcastReceiver();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void onStart() {
		super.onStart();
		registerBroadcastReceiver();
		updateUI();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void onDestroy() {
		super.onDestroy();
		unregisterBroadcastReceiver();
	}
}