package umcsandroid.tracker;

import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;

public class LoginActivity extends AppCompatActivity {
    public static final String USER_NAME = "umcsandroid.tracker.USER_NAME";
    public static final String ROOM_NAME = "umcsandroid.tracker.ROOM_NAME";
    public static final String PASSWORD = "umcsandroid.tracker.PASSWORD";

    EditText editText;
    String roomName, userName, password;

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

        ((Button) findViewById(R.id.loginButton))
                .setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        editText = (EditText) findViewById(R.id.roomName);
                        roomName = String.valueOf(editText.getText());

                        editText = (EditText) findViewById(R.id.username);
                        userName = String.valueOf(editText.getText());

                        editText = (EditText) findViewById(R.id.password);
                        password = String.valueOf(editText.getText());
                        new WebServiceHandler()
                                .execute("http://position-tracker.azurewebsites.net/api/v1/login");
                    }
                });
    }

    @Override
    public void onBackPressed() {
        final Dialog dialog = new Dialog(LoginActivity.this);

        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setContentView(R.layout.close_dialog);

        TextView txt = (TextView) dialog.findViewById(R.id.close_text);
        txt.setText("Are you sure you want to close application?");

        Button button = (Button) dialog.findViewById(R.id.NoButton);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });

        button = (Button) dialog.findViewById(R.id.YesButton);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
        dialog.show();
    }

    public void click(View v) {
        new AlertDialog.Builder(this)
                .setMessage("Login successful !")
                .setCancelable(false)
                .setPositiveButton("Continue", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        LoginActivity.this.finish();
                    }
                }).show();
    }

    private class WebServiceHandler extends AsyncTask<String, Void, String> {

        private ProgressDialog dialog = new ProgressDialog(LoginActivity.this);

        @Override
        protected void onPreExecute() {
            dialog.setMessage("Wait...");
            dialog.show();
        }

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

            HttpURLConnection urlConnection;
            JSONObject json = new JSONObject();
            String result = "";

            try {
                urlConnection = (HttpURLConnection) ((new URL(urls[0]).openConnection()));
                urlConnection.setRequestProperty("Content-Type", "application/json");
                urlConnection.setRequestProperty("Atccep", "application/json");
                urlConnection.setRequestMethod("POST");
                urlConnection.setInstanceFollowRedirects(false);
                urlConnection.connect();

                json.put("roomName", roomName);
                json.put("roomPassword", password);
                json.put("userName", userName);

                OutputStream outputStream = urlConnection.getOutputStream();
                BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
                writer.write(json.toString());
                writer.close();
                outputStream.close();

                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8"));

                String line;
                StringBuilder sb = new StringBuilder();

                while ((line = bufferedReader.readLine()) != null) {
                    sb.append(line);
                }

                bufferedReader.close();
                result = sb.toString();

            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
                return "ERROR";
            } catch (IOException e) {
                e.printStackTrace();
                return "ERROR";
            } catch (JSONException e) {
                e.printStackTrace();
                return "ERROR";
            }

            return  result;
        }

        protected void onPostExecute(String result) {

            if(result.equals("ERROR")) {
                dialogShow(LoginActivity.this, result);
            }
            else {
                try {

                    JSONObject jsonObject = new JSONObject(result);

                    JSONObject responseData = jsonObject.getJSONObject("meta");

                    int code = responseData.getInt("code");
                    String message = responseData.getString("message");


                    if (code == 200) {
                        Toast.makeText(getBaseContext(), "Login successful !",
                                Toast.LENGTH_SHORT).show();

                        Intent intent = new Intent(LoginActivity.this, MapActivity.class);
                        intent.putExtra(USER_NAME, userName);
                        intent.putExtra(ROOM_NAME, roomName);
                        intent.putExtra(PASSWORD, password);
                        startActivity(intent);
                    } else {
                        dialogShow(LoginActivity.this, message);
                    }


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

            dialog.dismiss();
        }
    }

    public void dialogShow(final Context context, String message) {
        final Dialog dialog = new Dialog(LoginActivity.this);

        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setContentView(R.layout.error_dialog);

        TextView txt = (TextView) dialog.findViewById(R.id.errorText);
        txt.setText(message);

        Button dismissButton = (Button) dialog.findViewById(R.id.errorDialogButton);
        dismissButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
        dialog.show();
    }
}