Button bttnLogin;
EditText loginEmail, loginPassword;
TextView regLink;
AlertDialog.Builder alert;


@Override
protected void onCreate(Bundle savedInstanceState)
{

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);

    loginEmail = (EditText) findViewById(R.id.email);
    loginPassword = (EditText) findViewById(R.id.password);

    regLink = (TextView) findViewById(R.id.regLink);
    regLink.setOnClickListener(new View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            startActivity(new Intent(Login.this, Register.class));

        }
    });


    bttnLogin = (Button) findViewById(R.id.bttnLogin);
    bttnLogin.setOnClickListener(new View.OnClickListener()
    {

        @Override
        public void onClick(View v)
        {
            if (loginEmail.getText().toString().equals("") || loginPassword.getText().toString().equals(""))
            {
                alert = new AlertDialog.Builder(Login.this);
                alert.setTitle("Login Failed");
                alert.setMessage("Try again");
                alert.setPositiveButton("OK", new DialogInterface.OnClickListener()
                {

                    @Override
                    public void onClick(DialogInterface dialog, int which)
                    {

                        dialog.dismiss();
                    }

                });

                AlertDialog alertDialog = alert.create();
                alertDialog.show();
            } else  //if user provides proper data
            {
                BackgroundTask backgroundTask = new BackgroundTask(Login.this);
                backgroundTask.execute("login", loginEmail.getText().toString(), loginPassword.getText().toString());
            }

        }


    });

private Button regButton;
        public EditText regName;
        public EditText regEmail;
        public EditText regPassword;
        public EditText conPassword;
        private AlertDialog.Builder alert;



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

    regName = (EditText) findViewById(R.id.name);
    regEmail = (EditText) findViewById(R.id.email);
    regPassword = (EditText) findViewById(R.id.password);
    conPassword = (EditText) findViewById(R.id.conPassword);
    regButton = (Button) findViewById(R.id.regButton);
    regButton.setOnClickListener(this);
}


@Override
public void onClick(View v)
{

    if (regName.getText().toString().equals("") || regEmail.getText().toString().equals("") ||  regPassword.getText().toString().equals("") || conPassword.getText().toString().equals(""))
    {
        alert = new AlertDialog.Builder(Register.this);
        alert.setTitle("Something not quite right");
        alert.setMessage("Please fill in all the fields");
        alert.setPositiveButton("OK", new DialogInterface.OnClickListener()
        {

            @Override
            public void onClick(DialogInterface dialog, int which)
            {

                dialog.dismiss();
            }

        });

        AlertDialog alertDialog = alert.create();
        alertDialog.show();

    } else if (!(regPassword.getText().toString().equals(conPassword.getText().toString())))
    {

        alert = new AlertDialog.Builder(Register.this);
        alert.setTitle("Passwords do not match");
        alert.setMessage("Try Again");
        alert.setPositiveButton("OK", new DialogInterface.OnClickListener()
        {

            @Override
            public void onClick(DialogInterface dialog, int which)
            {

                dialog.dismiss();

                conPassword.setText("");
                regPassword.setText("");
            }

        });

        AlertDialog alertDialog = alert.create();
        alertDialog.show();


    }
    else //if user provides proper data
    {
        BackgroundTask backgroundTask = new BackgroundTask(Register.this);
        backgroundTask.execute("register", regName.getText().toString(), regEmail.getText().toString()
                , regPassword.getText().toString(), conPassword.getText().toString());
    }

public class BackgroundTask extends AsyncTask<String,Void,String>
{

private Context context;
private Activity activity;
private String reg_url = "http://blaah.com/register.php";
private String login_url = "http://blaah.com/login.php";
private AlertDialog.Builder builder;
private ProgressDialog progressDialog;


public BackgroundTask(Context context)
{

    this.context = context;
    activity = (Activity) context;
}

@Override
protected void onPreExecute()
{
    builder = new AlertDialog.Builder(activity);
    progressDialog = new ProgressDialog(context);
    progressDialog.setTitle("Please wait");
    progressDialog.setMessage("Connecting to Server...");
    progressDialog.setIndeterminate(true);
    progressDialog.setCancelable(false);
    progressDialog.show();
}

@Override
protected String doInBackground(String... params)
{

    String method = params[0];

    if (method.equals("register"))
    {

        try
        {
            URL url = new URL(reg_url);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            String name = params[1];
            String email = params[2];
            String username = params[3];
            String password = params[4];
            String data = URLEncoder.encode("name", "UTF-8") + "=" + URLEncoder.encode(name, "UTF-8") + "&" +
                    URLEncoder.encode("email", "UTF-8") + "=" + URLEncoder.encode(email, "UTF-8") + "&" +
                    URLEncoder.encode("password", "UTF-8") + "=" + URLEncoder.encode(password, "UTF-8");
            bufferedWriter.write(data);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();
            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
            StringBuilder stringBuilder = new StringBuilder();
            String line = "";
            while ((line = bufferedReader.readLine()) != null)
            {

                stringBuilder.append(line).append("n");

            }


            httpURLConnection.disconnect();
            Thread.sleep(8000);
            return stringBuilder.toString().trim();

        } catch (MalformedURLException e)
        {
            e.printStackTrace();
        } catch (IOException e)
        {
            e.printStackTrace();
        } catch (InterruptedException e)
        {
            e.printStackTrace();
        }

    }
    else if (method.equals("login"))
    {
        try
        {
            URL url = new URL(login_url);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));


            String username,password;

            username = params[1];
            password = params [2];
            String data = URLEncoder.encode("email", "UTF-8") + "=" + URLEncoder.encode(username, "UTF-8") + "&" +
                    URLEncoder.encode("password", "UTF-8") + "=" + URLEncoder.encode(password, "UTF-8");
            bufferedWriter.write(data);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();

            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
            StringBuilder stringBuilder = new StringBuilder();
            String line = "";
            while ((line = bufferedReader.readLine()) != null)
            {

                stringBuilder.append(line + "n");

            }


            httpURLConnection.disconnect();
            Thread.sleep(5000);
            return stringBuilder.toString().trim();


        } catch (MalformedURLException e)
        {
            e.printStackTrace();
        } catch (ProtocolException e)
        {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e)
        {
            e.printStackTrace();
        } catch (IOException e)
        {
            e.printStackTrace();
        } catch (InterruptedException e)
        {
            e.printStackTrace();
        }
    }

    return null;
}

@Override
protected void onProgressUpdate(Void... values)
{
    super.onProgressUpdate(values);
}

@Override
protected void onPostExecute(String json)
{
   try
   {

       progressDialog.dismiss();


       Log.v("JSON", json);
       JSONObject jsonObject = new JSONObject(json);
       JSONArray jsonArray = jsonObject.getJSONArray("server_response");
       JSONObject jsonobject = jsonArray.getJSONObject(0);
       String code = jsonobject.getString("code");
       String message = jsonobject.getString("message");



       if(code.equals("reg_true"))
       {
           showDialog("Sucessful registration.Thank you.Enjoy_AS!", message, code);
       }

       else if (code.equals("reg_false"))
       {
           showDialog("User Already exists", message, code);
       }

       else if (code.equals("login_true"))
       {
           Toast.makeText(context, "You are logged in", Toast.LENGTH_LONG).show();
           Intent intent = new Intent(activity, SplashScreen.class);
           activity.startActivity(intent);


       } else if (code.equals("login_false"))
       {
           showDialog("Login Error", message, code);
       }


   } catch (JSONException e){
       e.printStackTrace();
   }


}

public void  showDialog(String title,String message,String code)
{

    builder.setTitle(title);
    if (code.equals("reg_true") || code.equals("reg_false"))
    {
        builder.setMessage(message);//message form server
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener()

        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                dialog.dismiss();
                activity.finish();

            }
        });


    }

    else if (code.equals("login_false"))
    {


        builder.setMessage(message);
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                EditText loginEmail, loginPassword;
                loginEmail = (EditText) activity.findViewById(R.id.email);
                loginPassword = (EditText) activity.findViewById(R.id.password);
                loginEmail.setText("");
                loginPassword.setText("");
                dialog.dismiss();

            }


        });


    }
    AlertDialog alertDialog = builder.create();
    alertDialog.show();
}