package com.joelmale.android.contactmanager;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.ParcelFileDescriptor;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.ContextMenu;
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.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TabHost;
import android.widget.TextView;
import android.widget.Toast;

import java.io.FileDescriptor;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends Activity {

    private static final int EDIT_OPTION = 0, DELETE_OPTION = 1;

    // Create our edit text variables
    EditText nameTxt, phoneTxt, emailTxt, addressTxt;
    ImageView contactImage;
    // <> automatically uses the first object type
    public static List<Contact> Contacts = new ArrayList<>();
    ListView contactListView;

    Uri imageUri = null;

    DatabaseHandler dbHandler;

    // Context menu for manipulation
    public static int longClickedItemIndex;
    ArrayAdapter<Contact> contactAdapter;

    public static Context mainContext;

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

        mainContext = getApplicationContext();

        /*
        While creating these, make sure to cast the type. Like (EditText), (Button), etc.
         */

        // Assign the edit text variable to the txtContactName ID by using findViewByID
        nameTxt = (EditText) findViewById(R.id.txtContactName);

        // Do the same for the other edit text variables
        phoneTxt = (EditText) findViewById(R.id.txtPhoneNumber);
        emailTxt = (EditText) findViewById(R.id.txtEmail);
        addressTxt = (EditText) findViewById(R.id.txtAddress);

        // Assign our list view
        contactListView = (ListView) findViewById(R.id.listView);

        // Assign our image view
        contactImage = (ImageView) findViewById(R.id.ivContactImage);

        // Assign our dbhandler
        dbHandler = new DatabaseHandler(getApplicationContext());

        // register the context menu on our list view
        registerForContextMenu(contactListView);

        contactListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> adapterView, View view, int position, long l) {
                longClickedItemIndex = position;
                return false;
            }
        });

        setUpTabs();

        // Create the button
        final Button addBtn = (Button) findViewById(R.id.btnAdd);
        addBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Create a a toast window to display a message
                if (imageUri == null) {
                    imageUri = resIdToUri(getApplicationContext(), R.drawable.nouserlogo);
                }
                Contact newContact = new Contact(dbHandler.getContactsCount(), String.valueOf(nameTxt.getText()), String.valueOf(phoneTxt.getText()), String.valueOf(emailTxt.getText()), String.valueOf(addressTxt.getText()), imageUri);
                if (!contactExists(newContact)) {
                    dbHandler.createContact(newContact);
                    Contacts.add(newContact);
                    // Let our adapater know data was changed
                    contactAdapter.notifyDataSetChanged();
                    Toast.makeText(getApplicationContext(), String.valueOf(nameTxt.getText()) + " was successfully added.", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(getApplicationContext(), String.valueOf(nameTxt.getText()) + " already exists. Please use a different name.", Toast.LENGTH_SHORT).show();
                }
                clearData();
                return;
            }
        });

        nameTxt.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                // Set the button to enabled if the nameTxt to string value
                // Trim all the whitespace with trim()
                // isEmpty to see if it's "" or not
                addBtn.setEnabled(!String.valueOf(nameTxt.getText()).trim().isEmpty());
            }

            @Override
            public void afterTextChanged(Editable s) {}
        });

        // New click listener for the image
        contactImage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // Open selection for gallery
                // Create a new intent
                Intent newImage = new Intent();
                // Set type to image
                newImage.setType("image/*");
                // Set the intent action
                newImage.setAction(Intent.ACTION_GET_CONTENT);
                // Start the activity for result (meaning start intent expecting a result)
                startActivityForResult(Intent.createChooser(newImage, "Select Contact Image"), 1);
            }
        });

        if (dbHandler.getContactsCount() != 0)
            Contacts.addAll(dbHandler.getAllContacts());

        populateList();
    }

    // Our context menu
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);

        // Our context
        // Set title and icons
        menu.setHeaderIcon(R.drawable.edit_contact_icon);
        menu.setHeaderTitle("Contact Options");

        // Add our menus
        // First: group id
        // Second: item id
        // Third: order
        // Fourth: name of it
        menu.add(Menu.NONE, EDIT_OPTION, menu.NONE, "Edit Contact");
        menu.add(Menu.NONE, DELETE_OPTION, menu.NONE, "Delete Contact");
    }

    public boolean onContextItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case EDIT_OPTION:
                //TODO Implement editing a contact
                Intent editContactIntent = new Intent(getApplicationContext(), EditContact.class);
                startActivityForResult(editContactIntent, 2);
                break;
            case DELETE_OPTION:
                dbHandler.deleteContact(Contacts.get(longClickedItemIndex));
                Contacts.remove(longClickedItemIndex);
                contactAdapter.notifyDataSetChanged();
                break;
        }

        return super.onContextItemSelected(item);
    }

    private boolean contactExists(Contact c) {
        String name = c.getName();
        int contactCount = Contacts.size();

        for (int i = 0; i < contactCount; i++) {
            if (name.compareToIgnoreCase(Contacts.get(i).getName()) == 0)
                return true;
        }
        return false;
    }

    @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) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private void clearData() {
        contactImage.setImageURI(resIdToUri(getApplicationContext(), R.drawable.nouserlogo));
        nameTxt.setText("");
        phoneTxt.setText("");
        emailTxt.setText("");
        addressTxt.setText("");
        imageUri = null;
    }

    private void setUpTabs() {
        // Create our TabHost
        TabHost tabHost = (TabHost) findViewById(R.id.tabHost);

        // Call the tab host set up function
        tabHost.setup();

        // Create a tabSpec for our first tab and assign the content
        TabHost.TabSpec tabSpec = tabHost.newTabSpec("creator");
        tabSpec.setContent(R.id.tabCreater);

        // Set the indicator (text label) for our first tab
        tabSpec.setIndicator("Creator");
        tabHost.addTab(tabSpec);

        // Second spec
        tabSpec = tabHost.newTabSpec("list");
        tabSpec.setContent(R.id.tabContactList);

        // Set the indicator (text label) for our first tab
        tabSpec.setIndicator("List");
        tabHost.addTab(tabSpec);
    }

    // Function to capture our start activity for result (dont need override)
    public void onActivityResult(int reqCode, int resCode, Intent data) {
        // Check if the intent is ok by checking if the result code is RESULT_OK
        if (resCode == RESULT_OK) {
            // If the request code is 1
            if (reqCode == 1) {
                // Set the variable
                imageUri = data.getData();
                // Set the contact image with the data's url
                contactImage.setImageURI(imageUri);
            } else if (reqCode == 2) {
                // stuff for edit contact
                contactAdapter.notifyDataSetChanged();
                populateList();
            }
        }
    }

    private void populateList() {
        contactAdapter = new ContactListAdapter();
        contactListView.setAdapter(contactAdapter);
        contactAdapter.notifyDataSetChanged();
    }

    /*
    I DONT UNDERSTAND HOW THIS WORKS, SO GO BACK AND FIND OUT. (ep 3 or 4 probably)
     */
    private class ContactListAdapter extends ArrayAdapter<Contact> {
        public ContactListAdapter() {
            // comment this
            super(MainActivity.this, R.layout.listview_item, Contacts);
        }

        @Override
        public View getView(int pos, View view, ViewGroup parent) {
            // Check if view is inflated by layout
            // If the view is null (aka not inflated)
            if (view == null)
                // Then inflate it using getLayout, pass in the listview.xml layout, the parent layout
                // which will be activity_main, and false to not attach to root
                view = getLayoutInflater().inflate(R.layout.listview_item, parent, false);

            // Create a currentContact object in for the contacts list at index pos
            Contact currentContact = Contacts.get(pos);

            // Set image view
            ImageView ivContactImage = (ImageView) view.findViewById(R.id.ivContactImage);
            ivContactImage.setImageURI(currentContact.getUri());

            // Set our variables equal to current contacts information
            TextView name = (TextView) view.findViewById(R.id.txtContactName);
            name.setText(currentContact.getName());

            TextView phone = (TextView) view.findViewById(R.id.txtPhoneNumber);
            phone.setText(currentContact.getPhone());

            TextView email = (TextView) view.findViewById(R.id.txtEmailAddress);
            email.setText(currentContact.getEmail());

            TextView address = (TextView) view.findViewById(R.id.txtAddress);
            address.setText(currentContact.getAddress());

            // Return our view
            return view;
        }
    }

    public static Uri resIdToUri(Context context, int resId) {
        return Uri.parse("android.resource://" + context.getPackageName()
                + "/" + resId);

    }
}