Tendencies

package rasmus_kurstein.budgetapp;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.Calendar;


public class Tendencies extends ActionBarActivity {

    ApplicationObject app;

    Spinner spinner;
    TextView monthlyAvg;
    TextView weeklyAvg;
    TextView dailyAvg;

    long avgDay;

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

        app = (ApplicationObject) getApplicationContext();

        monthlyAvg = (TextView) findViewById(R.id.monthlyAvg);
        weeklyAvg = (TextView) findViewById(R.id.weeklyAvg);
        dailyAvg = (TextView) findViewById(R.id.dailyAvg);

        ArrayList<String> categories = new ArrayList();
        categories.add("Total");
        categories.add("Category 1");
        categories.add("Category 2");
        categories.add("Category 3");
        categories.add("Category 4");
        categories.add("Category 5");
        categories.add("Category 6");

        //drop-down menu from http://developer.android.com/guide/topics/ui/controls/spinner.html
        spinner = (Spinner) findViewById(R.id.spinner);
        // Create an ArrayAdapter using the string array and a default spinner layout
        ArrayAdapter<String> adapter = new ArrayAdapter(this,
               android.R.layout.simple_spinner_item, categories);
        // Specify the layout to use when the list of choices appears
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        // Apply the adapter to the spinner
        spinner.setAdapter(adapter);
/*
        if(daysPast()>0){
            avgDay=(long)totalSpent("Total")/daysPast();
        } else{
            avgDay=(long)totalSpent("Total");
        }

        long avgWeek = avgDay*7;
        long avgMonth = avgDay*365/12;

        dailyAvg.setText(""+avgDay);
        weeklyAvg.setText(""+avgWeek);
        monthlyAvg.setText(""+avgMonth);
*/
        // spinner action from http://stackoverflow.com/questions/1337424/android-spinner-get-the-selected-item-change-event
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
                if(daysPast()>0){
                    avgDay=(long)totalSpent(spinner.getSelectedItem().toString())/daysPast();
                } else{
                    avgDay=(long)totalSpent(spinner.getSelectedItem().toString());
                }

                long avgWeek = avgDay*7;
                long avgMonth = avgDay*365/12;

                dailyAvg.setText(""+avgDay);
                weeklyAvg.setText(""+avgWeek);
                monthlyAvg.setText(""+avgMonth);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parentView) {
                if(daysPast()>0){
                    avgDay=(long)totalSpent("Total")/daysPast();
                } else{
                    avgDay=(long)totalSpent("Total");
                }

                long avgWeek = avgDay*7;
                long avgMonth = avgDay*365/12;

                dailyAvg.setText(""+avgDay);
                weeklyAvg.setText(""+avgWeek);
                monthlyAvg.setText(""+avgMonth);
            }
        });

    }

    public long daysPast(){
        Transaction firstTrans = app.getTransactions().get(app.getTransactions().size()-1);
        Calendar calendar1 = Calendar.getInstance();
        Calendar calendar2 = Calendar.getInstance();
        calendar1.set(firstTrans.getYear(), (firstTrans.getMonth()-1), firstTrans.getDay());
        long milsecs1= calendar1.getTimeInMillis();
        long milsecs2 = calendar2.getTimeInMillis();
        long diff = milsecs2 - milsecs1;
        long ddays = diff / (24 * 60 * 60 * 1000);
        return ddays;
    }

    public int totalSpent(String category){
        int total = 0;
        ArrayList<Transaction> transactions = new ArrayList<Transaction>();
        int size = app.getTransactions().size();
        if (size>0) {
            for (int i = 0; i < size; i++) {
                Transaction trans = app.getTransactions().get(i);
                switch(category){
                    case "Total":
                        transactions.add(trans);
                        break;
                    case "Category 1":
                        if (category==trans.getCategory()){
                            transactions.add(trans);
                        }
                    case "Category 2":
                        if (category==trans.getCategory()){
                            transactions.add(trans);
                        }
                    case "Category 3":
                        if (category==trans.getCategory()){
                            transactions.add(trans);
                        }
                    case "Category 4":
                        if (category==trans.getCategory()){
                            transactions.add(trans);
                        }
                    case "Category 5":
                        if (category==trans.getCategory()){
                            transactions.add(trans);
                        }
                    case "Category 6":
                        if (category==trans.getCategory()){
                            transactions.add(trans);
                        }

                }
            }
        }

        int size2 = transactions.size();
        if (size2>0) {
            for (int i = 0; i < size2; i++) {
                total = total+transactions.get(i).getAmount();
            }
        }
        return total;
    }
}