package com.xtremelabs.robolectric.shadows;


import android.app.Activity;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsSpinner;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Gallery;
import android.widget.Spinner;
import android.widget.TextView;

import com.xtremelabs.robolectric.Robolectric;
import com.xtremelabs.robolectric.WithTestDefaultsRunner;

import org.hamcrest.core.IsNull;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.assertThat;

@RunWith(WithTestDefaultsRunner.class)
public class AbsSpinnerTest {
    private Context context;
    private AdapterView adapterView;
	private Spinner spinner;
	private ShadowAbsSpinner shadowSpinner;
	private ArrayAdapter<String> arrayAdapter;

    @Before
    public void setUp() throws Exception {
        context = new Activity();
        adapterView = new Gallery(context);
		spinner = new Spinner(context);
		shadowSpinner = (ShadowAbsSpinner) Robolectric.shadowOf(spinner);
		String [] testItems = {"foo", "bar"};
		arrayAdapter = new MyArrayAdapter(this.context, testItems);
    }

    @Test
    public void shouldHaveAdapterViewCommonBehavior() throws Exception {
        AdapterViewBehavior.shouldActAsAdapterView(adapterView);
    }

	@Test
	public void checkSetAdapter() {
		spinner.setAdapter(arrayAdapter);
	}

	@Test
	public void getSelectedItemShouldReturnCorrectValue(){
		spinner.setAdapter(arrayAdapter);
		spinner.setSelection(0);
		assertThat((String) spinner.getSelectedItem(), equalTo("foo"));
		assertThat((String) spinner.getSelectedItem(), not(equalTo("bar")));

		spinner.setSelection(1);
		assertThat((String) spinner.getSelectedItem(), equalTo("bar"));
		assertThat((String) spinner.getSelectedItem(), not(equalTo("foo")));
	}

	@Test
	public void getSelectedItemShouldReturnNull_NoAdapterSet(){
		assertThat(spinner.getSelectedItem(), nullValue());
	}

	@Test (expected = IndexOutOfBoundsException.class)
	public void getSelectedItemShouldThrowException_EmptyArray(){
		spinner.setAdapter(new MyArrayAdapter(context, new String[]{}));
		spinner.getSelectedItem();
	}

	@Test
	public void setSelectionWithAnimatedTransition() {
		spinner.setAdapter(arrayAdapter);
		spinner.setSelection(0, true);

		assertThat((String) spinner.getSelectedItem(), equalTo("foo"));
		assertThat((String) spinner.getSelectedItem(), not(equalTo("bar")));

		assertThat(shadowSpinner.isAnimatedTransition(), equalTo(true));
	}

    @Test
    public void testGetSelectedView_noAdapter() {
        assertThat(spinner.getSelectedView(), nullValue());
    }

    @Test
    public void testGetSelectedView_noSelection() {
        spinner.setAdapter(arrayAdapter);
        spinner.setSelection(AdapterView.INVALID_POSITION);

        assertThat(spinner.getSelectedView(), nullValue());
    }

    @Test
    public void testGetSelectedView_default() {
        spinner.setAdapter(arrayAdapter);

        assertThat(((TextView) spinner.getSelectedView()).getText().toString(),
                equalTo("foo"));
    }

    @Test
    public void testGetSelectedView_changed() {
        spinner.setAdapter(arrayAdapter);
        spinner.setSelection(1);

        assertThat(((TextView) spinner.getSelectedView()).getText().toString(),
                equalTo("bar"));
    }

    private static class MyArrayAdapter extends ArrayAdapter<String> {
        public MyArrayAdapter(Context context, String[] testItems) {
            super(context, android.R.layout.simple_spinner_item, testItems);
        }

        @Override public View getView(int position, View convertView, ViewGroup parent) {
            TextView textView = new TextView(getContext());
            textView.setText(getItem(position));
            return textView;
        }
    }
}