package com.linseykate.findingfido;

/**
 * Main activity that creates fragments
 * for each tab and pushes records to
 * Firebase
 *
 * Help accessing GlobalVariables class from http://stackoverflow.com/questions/1944656/android-global-variable
 */

import android.app.Activity;
import android.content.Intent;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.media.Image;
import android.provider.ContactsContract;
import android.support.design.widget.TabLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RelativeLayout;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

import com.firebase.client.ChildEventListener;
import com.firebase.client.DataSnapshot;
import com.firebase.client.Firebase;
import com.firebase.client.FirebaseError;
import com.firebase.client.Query;
import com.firebase.client.ValueEventListener;
import com.shaded.fasterxml.jackson.databind.deser.DataFormatReaders;

import java.io.ByteArrayOutputStream;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    /**
     * The {@link android.support.v4.view.PagerAdapter} that will provide
     * fragments for each of the sections. We use a
     * {@link FragmentPagerAdapter} derivative, which will keep every
     * loaded fragment in memory. If this becomes too memory intensive, it
     * may be best to switch to a
     * {@link android.support.v4.app.FragmentStatePagerAdapter}.
     */
    private SectionsPagerAdapter mSectionsPagerAdapter;

    /**
     * The {@link ViewPager} that will host the section contents.
     */
    private ViewPager mViewPager;
    Firebase ref = new Firebase("https://findingfido.firebaseio.com/");
    int sizeBarVal;
    ArrayList<DogAttributes> dogRecords;
    ArrayList<RecordNoKeeper> recordIds;
    int recordIdsLength;
    int tempRecordNo;
    String newRecordNo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        /*dogRecords = new ArrayList<>();
        recordIds = new ArrayList<>();*/

        //Initial read-in of all data in Firebase
        ref.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot snapshot) {
                dogRecords = new ArrayList<>();
                recordIds = new ArrayList<>();
                for (DataSnapshot child : snapshot.getChildren()) {
                    if(child.getKey().length()==3) {
                        //Dog Record
                        DogAttributes records = child.getValue(DogAttributes.class); //store record in class variable
                        tempRecordNo = Integer.parseInt(child.getKey()) + 1; //set next record number based on last in
                        dogRecords.add(records);
                        RecordNoKeeper recordKeeper = new RecordNoKeeper();
                        recordKeeper.setImageString(records.getImageString());
                        recordKeeper.setRecordKey(child.getKey());
                        recordIds.add(recordKeeper);
                    }
                    else
                    {
                        //user data
                    }
                }
                if(String.valueOf(tempRecordNo).length()==1){
                    //Records 1-9
                    newRecordNo = "00"+String.valueOf(tempRecordNo);
                }
                else {
                    //Records 10+
                    newRecordNo = "0" + String.valueOf(tempRecordNo);
                }
                /*System.out.println("TEST dogRecords:" + dogRecords.size());
                System.out.println("TEST recordIds:" + recordIds.size());*/
                ((GlobalVariables) getApplication()).setDogRecords(dogRecords);
                ((GlobalVariables) getApplication()).setRecordIds(recordIds);
                recordIdsLength = recordIds.size();
            }

            @Override
            public void onCancelled(FirebaseError firebaseError) {
                System.out.println("The read failed: " + firebaseError.getMessage());
            }
        });

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        // Create the adapter that will return a fragment for each of the three
        // primary sections of the activity.
        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

        // Set up the ViewPager with the sections adapter.
        mViewPager = (ViewPager) findViewById(R.id.container);
        mViewPager.setAdapter(mSectionsPagerAdapter);

        TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
        tabLayout.setupWithViewPager(mViewPager);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            Intent intent = new Intent(this, SettingsActivity.class);
            startActivity(intent);
            return true;
        }
        if (id == R.id.action_logout) {
            ref.unauth();
            finish();
            return true;
        }
        if(id == R.id.action_notification)
        {
            Intent intent = new Intent(this, NotificationsActivity.class);
            startActivity(intent);
        }

        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {
        /**
         * The fragment argument representing the section number for this
         * fragment.
         */
        private static final String ARG_SECTION_NUMBER = "section_number";

        public PlaceholderFragment() {
        }

        /**
         * Returns a new instance of this fragment for the given section
         * number.
         */
        public static PlaceholderFragment newInstance(int sectionNumber) {
            PlaceholderFragment fragment = new PlaceholderFragment();
            Bundle args = new Bundle();
            args.putInt(ARG_SECTION_NUMBER, sectionNumber);
            fragment.setArguments(args);
            return fragment;
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            //if getArguments().getInt(ARG_SECTION_NUMBER) == 1,2,3 use different R.layout.fragment
            final View rootView;
            int sectionNumber = getArguments().getInt(ARG_SECTION_NUMBER);
            switch (sectionNumber)
            {
                //Photo Tab
                case 1: rootView = inflater.inflate(R.layout.fragment_photo, container, false);
                    Button btnUploadImage = (Button)rootView.findViewById(R.id.btnUpload);
                    btnUploadImage.setOnClickListener(new View.OnClickListener() {
                                @Override
                                public void onClick(View view) {
                                    Intent intent = new Intent(getActivity(), DrawingActivity.class);
                                    intent.putExtra("button_id", view.getId());
                                    getActivity().startActivity(intent);
                        }
                    });
                    Button btnTakeImage = (Button)rootView.findViewById(R.id.btnTake);
                    btnTakeImage.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            Intent intent = new Intent(getActivity(), DrawingActivity.class);
                            intent.putExtra("button_id", view.getId());
                            getActivity().startActivity(intent);
                        }
                    });
                    final RadioGroup dogColor = (RadioGroup)rootView.findViewById(R.id.rgColors);
                    SeekBar sizeBar = (SeekBar)rootView.findViewById(R.id.seekBarSize);
                    sizeBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                        @Override
                        public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
                            ((MainActivity)getActivity()).sizeBarVal = i;
                        }

                        @Override
                        public void onStartTrackingTouch(SeekBar seekBar) {

                        }

                        @Override
                        public void onStopTrackingTouch(SeekBar seekBar) {

                        }
                    });
                    Button btnSubmit = (Button)rootView.findViewById(R.id.btnSubmit);
                    btnSubmit.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            //perform calculations and push record to Firebase
                            DogAttributes dogObject = new DogAttributes();
                            double calcVal;
                            double headWidth;
                            double headHeight;
                            Bitmap bitmap = ((BitmapDrawable)((GlobalVariables) getActivity().getApplication()).getDogPic().getDrawable()).getBitmap();
                            Firebase userRef = ((MainActivity)getActivity()).ref.child(((MainActivity)getActivity()).newRecordNo);
                            ((GlobalVariables)getActivity().getApplication()).setRecentRecordNo(((MainActivity)getActivity()).newRecordNo);
                            userRef.child("imageString").setValue(encodeToBase64(bitmap, Bitmap.CompressFormat.JPEG, 100));
                            dogObject.setImageString(encodeToBase64(bitmap, Bitmap.CompressFormat.JPEG, 100));
                            userRef.child("userString").setValue(((MainActivity) getActivity()).ref.getAuth().getUid());
                            dogObject.setUserString(((MainActivity) getActivity()).ref.getAuth().getUid());
                            headWidth = calcVal = ((GlobalVariables) getActivity().getApplication()).getHeadFinishX() - ((GlobalVariables) getActivity().getApplication()).getHeadStartX();
                            userRef.child("headWidth").setValue(calcVal);
                            dogObject.setHeadWidth(calcVal);
                            headHeight = calcVal = ((GlobalVariables) getActivity().getApplication()).getHeadFinishY() - ((GlobalVariables) getActivity().getApplication()).getHeadStartY();
                            userRef.child("headHeight").setValue(calcVal);
                            dogObject.setHeadHeight(calcVal);
                            calcVal = ((GlobalVariables) getActivity().getApplication()).getrEyeFinishX() - ((GlobalVariables) getActivity().getApplication()).getlEyeStartX();
                            calcVal = calcVal/headWidth;
                            userRef.child("eyeOutside").setValue(calcVal);
                            dogObject.setEyeOutside(calcVal);
                            calcVal = ((GlobalVariables) getActivity().getApplication()).getrEyeStartX() - ((GlobalVariables) getActivity().getApplication()).getlEyeFinishX();
                            calcVal = calcVal/headWidth;
                            userRef.child("eyeInside").setValue(calcVal);
                            dogObject.setEyeInside(calcVal);
                            calcVal = ((GlobalVariables) getActivity().getApplication()).getNoseFinishY() - (((GlobalVariables) getActivity().getApplication()).getlEyeStartY()+((GlobalVariables) getActivity().getApplication()).getrEyeStartY())/2;
                            calcVal = calcVal/headHeight;
                            userRef.child("eyeNoseOutside").setValue(calcVal);
                            dogObject.setEyeNoseOutside(calcVal);
                            calcVal = ((GlobalVariables) getActivity().getApplication()).getNoseStartY() - (((GlobalVariables) getActivity().getApplication()).getlEyeFinishY()+((GlobalVariables) getActivity().getApplication()).getrEyeFinishY())/2;
                            calcVal = calcVal/headHeight;
                            userRef.child("eyeNoseInside").setValue(calcVal);
                            dogObject.setEyeNoseInside(calcVal);
                            calcVal = ((GlobalVariables) getActivity().getApplication()).getNoseStartY() - ((GlobalVariables) getActivity().getApplication()).getHeadStartY();
                            calcVal = calcVal/headHeight;
                            userRef.child("headNoseTop").setValue(calcVal);
                            dogObject.setHeadNoseTop(calcVal);
                            calcVal = ((GlobalVariables) getActivity().getApplication()).getNoseFinishY() - ((GlobalVariables) getActivity().getApplication()).getHeadStartY();
                            calcVal = calcVal/headHeight;
                            userRef.child("headNoseBottom").setValue(calcVal);
                            dogObject.setHeadNoseBottom(calcVal);
                            RadioButton selectedColor = (RadioButton)dogColor.findViewById(dogColor.getCheckedRadioButtonId());
                            userRef.child("color").setValue(selectedColor.getText().toString());
                            dogObject.setColor(selectedColor.getText().toString());
                            userRef.child("size").setValue(((MainActivity) getActivity()).sizeBarVal);
                            dogObject.setSize(((MainActivity) getActivity()).sizeBarVal);

                            ((GlobalVariables) getActivity().getApplication()).setDogToMatch(dogObject);

                            Toast toast = Toast.makeText(getActivity().getApplicationContext(), "Uploaded successfully!", Toast.LENGTH_SHORT);
                            toast.show();
                            RelativeLayout temp = ((GlobalVariables) getActivity().getApplication()).getHiddenSection();
                            temp.setVisibility(View.INVISIBLE);

                            Intent intent = new Intent(getActivity(), MatchActivity.class);
                            getActivity().startActivity(intent);
                        }
                    });
                    ((GlobalVariables) getActivity().getApplication()).setHiddenSection((RelativeLayout)rootView.findViewById(R.id.visibleContainer));
                    ((GlobalVariables) getActivity().getApplication()).setDogPic((ImageView) rootView.findViewById(R.id.ivDogPic));
                    return rootView;
                //Browse Tab
                case 2: rootView = inflater.inflate(R.layout.fragment_browse, container, false);
                    //Adapted from http://javatechig.com/android/android-gridview-example-building-image-gallery-in-android
                    final GridView gridView;
                    GridViewAdapter gridAdapter;
                    gridView = (GridView) rootView.findViewById(R.id.gridView);
                    gridAdapter = new GridViewAdapter(getContext(), R.layout.grid_item_layout, getData());
                    gridView.setAdapter(gridAdapter);
                    Button btnFilter = (Button)rootView.findViewById(R.id.btnFilter);
                    btnFilter.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            //Refresh
                            gridView.invalidateViews();
                        }
                    });
                    return rootView;
                default: rootView = inflater.inflate(R.layout.fragment_main, container, false);
            }
            return rootView;
        }
        //Taken from http://stackoverflow.com/questions/9768611/encode-and-decode-bitmap-object-in-base64-string-in-android
        public static String encodeToBase64(Bitmap image, Bitmap.CompressFormat compressFormat, int quality)
        {
            ByteArrayOutputStream byteArrayOS = new ByteArrayOutputStream();
            image.compress(compressFormat, quality, byteArrayOS);
            return Base64.encodeToString(byteArrayOS.toByteArray(), Base64.DEFAULT);
        }

        public static Bitmap decodeBase64(String input)
        {
            byte[] decodedBytes = Base64.decode(input, 0);
            return BitmapFactory.decodeByteArray(decodedBytes, 0, decodedBytes.length);
        }

        private ArrayList<ImageItem> getData() {
            final ArrayList<ImageItem> imageItems = new ArrayList<>();
            Query queryRef = ((MainActivity)getActivity()).ref.orderByChild("picstring");
            queryRef.addChildEventListener(new ChildEventListener() {
                @Override
                public void onChildAdded(DataSnapshot snapshot, String previousChild) {
                    //for (DataSnapshot child : snapshot.getChildren()) {
                        //if(child.getKey().length()==3){
                        if(snapshot.getKey().length()==3){
                            DogAttributes records = snapshot.getValue(DogAttributes.class);
                            Bitmap myBitmapAgain = decodeBase64(records.getImageString());
                            imageItems.add(new ImageItem(myBitmapAgain, getRecordId(records.getImageString())));
                        }
                    //}
                }

                private String getRecordId(String imageStr) {
                    for(int i=0; i<((MainActivity)getActivity()).recordIdsLength; i++){
                        if(((MainActivity)getActivity()).recordIds.get(i).getImageString().equals(imageStr)){
                            return ((MainActivity)getActivity()).recordIds.get(i).getRecordKey();
                        }
                    }
                    return null;
                }

                @Override
                public void onChildRemoved(DataSnapshot snapshot) {
                    //do nothing
                }

                @Override
                public void onChildChanged(DataSnapshot snapshot, String previousChild) {
                    //do nothing
                }

                @Override
                public void onChildMoved(DataSnapshot snapshot, String previousChild) {
                    //do nothing
                }

                @Override
                public void onCancelled(FirebaseError error) {
                    //do nothing
                }
            });
            return imageItems;
        }
    }

    /**
     * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
     * one of the sections/tabs/pages.
     */
    public class SectionsPagerAdapter extends FragmentPagerAdapter {

        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            // getItem is called to instantiate the fragment for the given page.
            // Return a PlaceholderFragment (defined as a static inner class below).
            return PlaceholderFragment.newInstance(position + 1);
        }

        @Override
        public int getCount() {
            // Show 2 total pages.
            return 2;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            switch (position) {
                case 0:
                    return "PHOTO";
                case 1:
                    return "BROWSE";
            }
            return null;
        }
    }
}