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

import android.app.ActionBar;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.EditTextPreference;
import android.preference.Preference;
import android.preference.PreferenceCategory;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.provider.MediaStore;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;

import java.util.HashMap;

import de.tudarmstadt.informatik.hostage.R;
import de.tudarmstadt.informatik.hostage.persistence.ProfileManager;
import de.tudarmstadt.informatik.hostage.model.Profile;

/**
 * Creates an preference screen to edit an profile
 *
 * @author Alexander Brakowski
 * @created 08.02.14 23:39
 */
public class ProfileEditFragment extends PreferenceFragment implements
		SharedPreferences.OnSharedPreferenceChangeListener {

	/**
	 * Holds the shared preference editor for out preference screen
	 */
	private SharedPreferences.Editor mPrefs;

	/**
	 * A map which mirrors the state protocols in the preferencescreen
	 */
	private HashMap<String, Boolean> mProfileProtocols;

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void onCreate(Bundle savedInstanceState){
		getActivity().getActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
		super.onCreate(savedInstanceState);

		LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

		// remove default action bar and replace it with an "done"/"discard" action bar
		View actionBarButtons = inflater.inflate(R.layout.actionbar_donebar, new LinearLayout(getActivity()), false);
		getActivity().getActionBar().setCustomView(actionBarButtons);

		View doneButton = actionBarButtons.findViewById(R.id.action_done);
		View cancelButton = actionBarButtons.findViewById(R.id.action_cancel);

		// add click listener for the save button
		doneButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
				ProfileManager pmanager = ProfileManager.getInstance();

				Profile profile = getProfile();

				boolean createNew = false;

				// no profile was given to the fragment, which means this is a new profile
				if(profile == null){
					profile = new Profile();
					createNew = true;
				} else {
					// profile was given, if profile is not editable, clone the profile and make it editable
					if(!profile.isEditable()){
						profile = profile.cloneProfile();
						profile.mEditable = true;
						createNew = true;
					}
				}

				// update the profile object data with data from the preferences
				profile.mLabel = prefs.getString("pref_profile_general_name", profile.mLabel);
				profile.mIconPath = prefs.getString("pref_profile_general_image", profile.mIconPath);
				profile.mText = prefs.getString("pref_profile_general_description", profile.mText);
				profile.mGhostActive = prefs.getBoolean("pref_profile_protocols_ghost_active", profile.mGhostActive);
				profile.mGhostPorts = prefs.getString("pref_profile_protocols_ghost_text", "");

				if(profile.mLabel == null || profile.mLabel.isEmpty()){
					new AlertDialog.Builder(getActivity()).setTitle(R.string.information).setMessage(R.string.profile_needs_name)
							.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
								public void onClick(DialogInterface dialog, int which) {

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

				if(profile.mGhostPorts.isEmpty()){
					profile.mGhostActive = false;
				}

				profile.mActiveProtocols = new HashMap<String, Boolean>(mProfileProtocols);

				// persist the changes of the profile
				if(createNew){
					profile.mId = -1;
					profile.mIconId = 0;
					profile.mIconName = "";
					profile.mIsRandom = false;
					profile.mIcon = null;
					pmanager.addProfile(profile);
				} else {
					pmanager.persistProfile(profile);
				}

				getActivity().finish();
			}
		});

		cancelButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				getActivity().finish();
			}
		});

		Profile profile = getProfile();
		mPrefs = PreferenceManager.getDefaultSharedPreferences(getActivity()).edit();

		String pname = "",
			   pimage = null,
			   pdesc = "",
			   pghost = "";

		boolean pbghost = false;

		if(profile != null){
			pname = profile.mLabel;
			pimage = profile.mIconPath;
			pdesc = profile.mText;
			pghost = profile.mGhostPorts;
			pbghost = profile.mGhostActive;
		}

		// fill the preferences of the preference screen with data from the profile object
		mPrefs.putString("pref_profile_general_name", pname);
		mPrefs.putString("pref_profile_general_image", pimage);
		mPrefs.putString("pref_profile_general_description", pdesc);
		mPrefs.putString("pref_profile_protocols_ghost_text", pghost);
		mPrefs.putBoolean("pref_profile_protocols_ghost_active", pbghost);

		mPrefs.commit();

		// create the preference view
		addPreferencesFromResource(R.xml.profile_preferences);

		Preference pref = findPreference("pref_profile_general_image");

		assert pref != null;

		if(profile != null){
			pref.setIcon(profile.getIconDrawable());
			mProfileProtocols = new HashMap<String, Boolean>(profile.mActiveProtocols);
		} else {
			mProfileProtocols = new HashMap<String, Boolean>();
		}

		// show an image chooser dialog when pressing the image preference
		pref.setOnPreferenceClickListener(
				new Preference.OnPreferenceClickListener() {
					@Override
					public boolean onPreferenceClick(Preference preference) {
						Intent intent = new Intent();
						intent.setType("image/*");
						intent.setAction(Intent.ACTION_GET_CONTENT);
						int PICK_IMAGE = 1;
						startActivityForResult(Intent.createChooser(intent, getString(R.string.select_icon)), PICK_IMAGE);
						return true;
					}
				}
		);

		if(profile != null){
			findPreference("pref_profile_general_name").setSummary(profile.mLabel);
			findPreference("pref_profile_general_description").setSummary(profile.mText);

			if(!profile.mGhostPorts.isEmpty()) findPreference("pref_profile_protocols_ghost_text").setSummary(profile.mGhostPorts);
		}

		if(profile == null || profile.isEditable()){
			getPreferenceScreen().removePreference(findPreference("pref_profile_warning"));
		}

		PreferenceCategory protocolsCategory = (PreferenceCategory) findPreference("pref_profile_protocols_settings");
		String[] protocols = getResources().getStringArray(R.array.protocols);
		String[] protocols_summary = getResources().getStringArray(R.array.protocols_description);

		// add all available protocols to the preference screen with an checkbox
		for(int i = 0; i<protocols.length; i++){
			if(protocols[i].equals("GHOST")) continue;

			mPrefs.putBoolean("pref_profile_protocol_" + protocols[i], profile != null && profile.isProtocolActive(protocols[i]));
			mPrefs.commit();

			CheckBoxPreference check = new CheckBoxPreference(getActivity());
			check.setTitle(protocols[i]);
			check.setKey("pref_profile_protocol_" + protocols[i]);
			check.setSummary(protocols_summary[i]);

			protocolsCategory.addPreference(check);
		}
	}

	/**
	 * Retrieve the given profile from the intent
	 * @return the profile
	 */
	public Profile getProfile(){
		ProfileManager pmanager = ProfileManager.getInstance();

		Intent intent = getActivity().getIntent();
		int profile_id = intent.getIntExtra("profile_id", -1);

		if(profile_id != -1){
			return pmanager.getProfile(profile_id);
		}

		return null;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void onResume() {
		super.onResume();
		getPreferenceManager().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void onPause() {
		getPreferenceManager().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
		super.onPause();
	}

	/**
	 * Called when a shared preference is changed, added, or removed. This
	 * may be called even if a preference is set to its existing value.
	 *
	 * <p>This callback will be run on your main thread.
	 *
	 * @param sharedPreferences The {@link android.content.SharedPreferences} that received
	 *                          the change.
	 * @param key               The key of the preference that was changed, added, or
	 */
	@Override
	public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
		Preference p = findPreference(key);

		if(p instanceof EditTextPreference){
			p.setSummary(sharedPreferences.getString(key, ""));
		} else if(p instanceof CheckBoxPreference && !p.getKey().equals("pref_profile_protocols_ghost_active")){
			mProfileProtocols.put(p.getTitle().toString(), ((CheckBoxPreference) p).isChecked());
			//System.out.println("------------------------------- P: " + ((CheckBoxPreference) p).isChecked());
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
		super.onActivityResult(requestCode, resultCode, imageReturnedIntent);

		if(resultCode == Activity.RESULT_OK){
			Cursor cursor = getActivity().getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
					new String[]{
							MediaStore.Images.Media.DATA,
							MediaStore.Images.Media.DATE_ADDED,
							MediaStore.Images.ImageColumns.ORIENTATION
					},
			MediaStore.Images.Media.DATE_ADDED, null, "date_added ASC");

			String filePath = "";
			if(cursor != null && cursor.moveToFirst())
			{
				do {
					filePath = Uri.parse(cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA))).toString();
				} while(cursor.moveToNext());
				cursor.close();
			}

			Preference pref = findPreference("pref_profile_general_image");

			BitmapFactory.Options options = new BitmapFactory.Options();
			options.inPreferredConfig = Bitmap.Config.ARGB_8888;
			Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);

			pref.setIcon(new BitmapDrawable(getResources(), bitmap));

			mPrefs.putString("pref_profile_general_image", filePath);
			mPrefs.commit();
		}
	}
}