package com.example.an02_gui_io_pignetl;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.app.DatePickerDialog;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import java.text.Format;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;

public class MainActivity extends AppCompatActivity {

    private EditText editTextFirstName;
    private EditText editTextLastName;
    private EditText editTextBirthDate;
    private EditText editTextIncome;

    private String firstname = "no name";
    private String lastname = "no name";
    private String birthdate = "0/0/00";
    private Double income = 0.0;

    Format dateFormat;
    String pattern;

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

        editTextFirstName = findViewById(R.id.editTextFirstName);
        editTextLastName = findViewById(R.id.editTextLastName);
        editTextBirthDate = findViewById(R.id.editTextBirthDate);
        editTextIncome = findViewById(R.id.editTextIncome);

        dateFormat = android.text.format.DateFormat.getDateFormat(getApplicationContext());
        pattern = ((SimpleDateFormat) dateFormat).toLocalizedPattern();
    }

    private void writeOutput(String message) {
        Log.d("MainActivity ", message + " " + firstname + " " + lastname + " " + birthdate + " " + income);
    }

    public void onButtonSave_click(View v) {

        String firstname = editTextFirstName.getText().toString();
        String lastname = editTextLastName.getText().toString();
        String birthdate = editTextBirthDate.getText().toString();
        String incomedouble = editTextIncome.getText().toString();


        try {
            if (firstname.equals("")) {
                new AlertDialog.Builder(this)
                        .setMessage("Firstname may not be empty")
                        .setNeutralButton("understood",null)
                        .show();
            }
            else {
                if (lastname.equals("")) {
                    new AlertDialog.Builder(this)
                            .setMessage("Lastname may not be empty")
                            .setNeutralButton("understood",null)
                            .show();
                }
                else {
                    if (birthdate.equals("")) {
                        new AlertDialog.Builder(this)
                                .setMessage("Birthdate may not be empty")
                                .setNeutralButton("understood",null)
                                .show();
                    }
                    else {
                        if (incomedouble.equals("")) {
                            new AlertDialog.Builder(this)
                                    .setMessage("Income may not be empty")
                                    .setNeutralButton("understood", null)
                                    .show();
                        }
                        else {
                            Double income = Double.parseDouble(incomedouble);

                            Toast.makeText(this, "saved...", Toast.LENGTH_LONG).show();

                            this.firstname = firstname;
                            this.lastname = lastname;
                            this.birthdate = birthdate;
                            this.income = income;
                        }
                    }
                }
            }
        }
        catch(Exception e) {
            new AlertDialog.Builder(this)
                    .setMessage("Something went wrong! The problem was: " + e)
                    .setNeutralButton("understood", null)
                    .show();
        }
    }

    public void editTextBirthDate_click(View v) {
        Calendar c = parseDate(editTextBirthDate.getText().toString());
        int mYear = c.get(Calendar.YEAR);
        int mMonth = c.get(Calendar.MONTH);
        int mDay = c.get(Calendar.DAY_OF_MONTH);
        DatePickerDialog dialog = new DatePickerDialog(this, (view, year, monthOfYear, dayOfMonth) -> {
            Calendar c1 = Calendar.getInstance();
            c1.set(year, monthOfYear, dayOfMonth);
            Date myDate = c1.getTime();
            String dateStr = new SimpleDateFormat(pattern, Locale.getDefault()).format(myDate);
            editTextBirthDate.setText(dateStr);
        }, mYear, mMonth, mDay);
        dialog.show();
    }

    private Calendar parseDate(String dateStr) {
        Calendar c = Calendar.getInstance();
        try {
            Date myDate = new SimpleDateFormat(pattern, Locale.getDefault()).parse(dateStr);
            c.setTime(myDate);
        }
        catch (ParseException e) {
            Toast.makeText(this, "No valid date entered!", Toast.LENGTH_LONG).show();
        }
        return c;
    }

    @Override
    protected void onPause() {
        super.onPause();
        writeOutput("Activity paused");
    }

    @Override
    protected void onStop() {
        super.onStop();
        writeOutput("Activity stopped");
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putString("FIRSTNAME",firstname);
        outState.putString("LASTNAME",lastname);
        outState.putString("MYDATE",birthdate);
        outState.putDouble("INCOME",income);

        writeOutput("Activity state saved");
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        restoreInstanceState(savedInstanceState);
    }

    private void restoreInstanceState(Bundle savedInstanceState) {
        if (savedInstanceState == null) {
            firstname = "no name";
            lastname = "no Name";
            birthdate = "0/0/00";
            income = 0.0;
            writeOutput("Activity state initialized");
        }
        else {
            firstname = savedInstanceState.getString("FIRSTNAME");
            lastname = savedInstanceState.getString("LASTNAME");
            birthdate = savedInstanceState.getString("MYDATE");
            income = savedInstanceState.getDouble("INCOME");

            writeOutput("Activity state restored");
        }
    }
}