package com.psksoft.watchphone.viewmodels;

import android.os.Bundle;
import android.util.Log;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.PendingResult;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.wearable.Asset;
import com.google.android.gms.wearable.DataApi;
import com.google.android.gms.wearable.DataEvent;
import com.google.android.gms.wearable.DataEventBuffer;
import com.google.android.gms.wearable.DataItem;
import com.google.android.gms.wearable.DataItemBuffer;
import com.google.android.gms.wearable.DataMap;
import com.google.android.gms.wearable.DataMapItem;
import com.google.android.gms.wearable.Wearable;
import com.psksoft.commonlib.activities.IActivityViewModel;
import com.psksoft.commonlib.models.MessageNames;
import com.psksoft.commonlib.services.ActivityServices;
import com.psksoft.commonlib.services.WearableCommunicationService;
import com.psksoft.watchphone.models.Contact;
import com.psksoft.watchphone.services.WearMessageListenerService;

import org.json.JSONArray;
import org.json.JSONObject;
import org.robobinding.annotation.ItemPresentationModel;
import org.robobinding.presentationmodel.HasPresentationModelChangeSupport;
import org.robobinding.presentationmodel.PresentationModelChangeSupport;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

@org.robobinding.annotation.PresentationModel
public class ContactsActivityViewModel implements IActivityViewModel,
        HasPresentationModelChangeSupport,
        DataApi.DataListener,
        GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener {
    ActivityServices _ActivityServices;
    PresentationModelChangeSupport _ChangeNotify;
    WearableCommunicationService _WearableCommunicationService;
    WearMessageListenerService _WearMessageListenerService;
    List<Contact> _Contacts;
    private GoogleApiClient mGoogleApiClient;

    public ContactsActivityViewModel(ActivityServices activityServices, WearableCommunicationService wearableCommunicationService, WearMessageListenerService wearMessageListenerService) {
        _ActivityServices = activityServices;
        _ChangeNotify = new PresentationModelChangeSupport(this);
        _WearableCommunicationService = wearableCommunicationService;
        _Contacts = new ArrayList<Contact>();

        _WearMessageListenerService = wearMessageListenerService;
    }

    @ItemPresentationModel(ContactItemViewModel.class)
    public List<Contact> getContacts() {
        return _Contacts;
    }

    public void setContacts(List<Contact> value) {
        _Contacts = value;
    }

    public void clickContact() {
    }

    @Override
    public PresentationModelChangeSupport getPresentationModelChangeSupport() {
        return _ChangeNotify;
    }

    @Override
    public void onConnected(Bundle bundle) {
        _WearableCommunicationService.sendMessage(MessageNames.RequestContacts, "");

        PendingResult<DataItemBuffer> results = Wearable.DataApi.getDataItems(mGoogleApiClient);
        results.setResultCallback(new ResultCallback<DataItemBuffer>() {
            @Override
            public void onResult(DataItemBuffer dataItems) {
                if (dataItems.getCount() != 0) {
                    DataItem dataItem = dataItems.get(0);
                    readContactsFromDataItem(dataItem);
                }

                dataItems.release();
            }
        });
    }

    @Override
    public void onConnectionSuspended(int i) {
    }

    private void readContactsFromDataItem(DataItem dataItem) {
        if (dataItem.getUri().getPath().equals("/wear_phone/contacts")) {
            DataMap dataMap = DataMapItem.fromDataItem(dataItem).getDataMap();
            Asset asset = dataMap.getAsset("contacts");
            if (!mGoogleApiClient.isConnected()) {
                ConnectionResult result = mGoogleApiClient.blockingConnect(10000, TimeUnit.MILLISECONDS);
                if (!result.isSuccess()) {
                    Log.w("watch phone", "Can not connect to Google Api");
                    return;
                }
            }

            PendingResult<DataApi.GetFdForAssetResult> pendingResult = Wearable.DataApi.getFdForAsset(mGoogleApiClient, asset);
            pendingResult.setResultCallback(new ResultCallback<DataApi.GetFdForAssetResult>() {
                @Override
                public void onResult(DataApi.GetFdForAssetResult result) {
                    String json = "";

                    InputStream assetInputStream = result.getInputStream();
                    byte[] buffer = new byte[1024];
                    try {
                        ByteArrayOutputStream mem = new ByteArrayOutputStream();
                        int cnt = assetInputStream.read(buffer, 0, buffer.length);
                        if (cnt > 0) {
                            mem.write(buffer, 0, cnt);
                            while (cnt == buffer.length) {
                                try {
                                    cnt = assetInputStream.read(buffer, 0, buffer.length);
                                    mem.write(buffer, 0, cnt);
                                } catch (Exception ex) {
                                    Log.e("watch phone", ex.getMessage());
                                }
                            }
                        }

                        json = new String(mem.toByteArray(), "UTF-8");
                    } catch (Exception ex) {
                        Log.e("watch phone", ex.getMessage());
                    }

                    _Contacts = new ArrayList<Contact>();
                    try {
                        JSONArray jContacts = new JSONArray(json);
                        for (int i = 0; i < jContacts.length(); i++) {
                            JSONObject jContact = jContacts.getJSONObject(i);
                            Contact contact = new Contact();
                            contact.setDisplayName(jContact.getString("name"));
                            _Contacts.add(contact);
                        }
                    } catch (Exception ex) {
                        Log.e("watch phone - deserializing json contacts", ex.getMessage());
                    }

                    try {
                        _ChangeNotify.firePropertyChange("Contacts");
                    }catch(Exception ex){
                        Log.e("watch phone", ex.getMessage());
                    }
                }
            });
        }
    }

    @Override
    public void onDataChanged(DataEventBuffer dataEvents) {
        for (DataEvent event : dataEvents) {
            if (event.getType() == DataEvent.TYPE_CHANGED) {
                DataItem dataItem = event.getDataItem();
                readContactsFromDataItem(dataItem);
            } else if (event.getType() == DataEvent.TYPE_DELETED) {
            }
        }
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
    }

    @Override
    public void onStart() {

    }

    @Override
    public void onRestart() {

    }

    @Override
    public void onResume() {
        Wearable.DataApi.addListener(mGoogleApiClient, this);
        mGoogleApiClient.connect();
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        mGoogleApiClient = new GoogleApiClient.Builder(_ActivityServices.getAppication())
                .addApi(Wearable.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();
    }

    @Override
    public void onPause() {
        Wearable.DataApi.removeListener(mGoogleApiClient, this);
        mGoogleApiClient.disconnect();
    }

    @Override
    public void onStop() {
    }
}