//worked on this all day. ended up running out of time. i know most of the assignment is missing and
// much of the code is broken but i tried :(

package com.example.jeffdesktop.jeffbreinerexam2;

import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends AppCompatActivity {

    Purchase aPurchase = new Purchase();
    private SharedPreferences preferences;
    private SharedPreferences.Editor preferencesEditor;

    private static final String USD = "usd";
    private static final String EURO = "euro";
    private static final String CANADA = "canada";
    private static final String CURRENCY_SETTINGS = "currency_settings";
    private double currencyModifier;
    public static final String FRAGMENT_KEY = "KEY";

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

        preferences = PreferenceManager.getDefaultSharedPreferences(this);
        preferencesEditor = preferences.edit();

        String inputPreference = preferences.getString(CURRENCY_SETTINGS, USD);
        switch (inputPreference){
            case USD:
                currencyModifier = 1;
                break;
            case EURO:
                currencyModifier = 1.16;
                break;
            case CANADA:
                currencyModifier = 0.76;
                break;
        }

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

    }

    @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) {
        switch (item.getItemId()){
            case R.id.USD:
                currencyModifier = 1;
                preferencesEditor.putString(CURRENCY_SETTINGS, USD);
                preferencesEditor.commit();
                //clearActivity();
                return true;
            case R.id.Euro:
                currencyModifier = 1.16;
                preferencesEditor.putString(CURRENCY_SETTINGS, EURO);
                preferencesEditor.commit();
                //clearActivity();
                return true;
            case R.id.Canada:
                currencyModifier = 0.76;
                preferencesEditor.putString(CURRENCY_SETTINGS, CANADA);
                preferencesEditor.commit();
                //clearActivity();
                return true;
            default:
                return false;
        }
    }
}