package com.example.shiburagi.language;

import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

import java.util.Locale;


public class MainActivity extends AppCompatActivity {

    private final String prefs_key = "language_prefs";
    private final String locale_key = "locale";
    private static Locale defaultLocale;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        if (MainActivity.defaultLocale == null)
            MainActivity.defaultLocale = Locale.getDefault();

        String localeCode = getSharedPreferences(prefs_key, MODE_PRIVATE).getString(locale_key, null);
        setLocale(localeCode);

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void japaneseLanguage(View view) {
        SharedPreferences.Editor editor = getSharedPreferences(prefs_key, MODE_PRIVATE).edit();
        editor.putString(locale_key, "ja");
        editor.apply();

        restart();
    }

    public void defaultLanguage(View view) {
        SharedPreferences.Editor editor = getSharedPreferences(prefs_key, MODE_PRIVATE).edit();
        editor.remove(locale_key);
        editor.apply();

        restart();
    }

    private void restart(){
        startActivity(new Intent(this, MainActivity.class));
        finish();
    }

    private void setLocale(String code) {
        Locale locale;


        if (code != null)
            locale = new Locale(code);
        else
            locale = MainActivity.defaultLocale;

        Locale.setDefault(locale);

        Configuration configuration = new Configuration();
        configuration.locale = locale;

        getBaseContext().getResources().updateConfiguration(
                configuration,
                getBaseContext().getResources().getDisplayMetrics()
        );
    }
}