/***
 * Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 	http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package br.com.caelum.vraptor.core;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.instanceOf;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.typeCompatibleWith;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map.Entry;
import java.util.ResourceBundle;

import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import br.com.caelum.vraptor.Convert;
import br.com.caelum.vraptor.Converter;
import br.com.caelum.vraptor.VRaptorException;
import br.com.caelum.vraptor.converter.BooleanConverter;
import br.com.caelum.vraptor.converter.ByteConverter;
import br.com.caelum.vraptor.converter.DoubleConverter;
import br.com.caelum.vraptor.converter.EnumConverter;
import br.com.caelum.vraptor.converter.FloatConverter;
import br.com.caelum.vraptor.converter.IntegerConverter;
import br.com.caelum.vraptor.converter.LocaleBasedCalendarConverter;
import br.com.caelum.vraptor.converter.LocaleBasedDateConverter;
import br.com.caelum.vraptor.converter.LongConverter;
import br.com.caelum.vraptor.converter.PrimitiveBooleanConverter;
import br.com.caelum.vraptor.converter.PrimitiveByteConverter;
import br.com.caelum.vraptor.converter.PrimitiveDoubleConverter;
import br.com.caelum.vraptor.converter.PrimitiveFloatConverter;
import br.com.caelum.vraptor.converter.PrimitiveIntConverter;
import br.com.caelum.vraptor.converter.PrimitiveLongConverter;
import br.com.caelum.vraptor.converter.PrimitiveShortConverter;
import br.com.caelum.vraptor.converter.ShortConverter;
import br.com.caelum.vraptor.ioc.Container;

public class DefaultConvertersTest {

	@Mock private Container container;
	private DefaultConverters converters;

	@Before
	public void setup() {
		MockitoAnnotations.initMocks(this);
	this.converters = new DefaultConverters(container);
	}

	@Test
	public void shouldRegisterConvertersForAllDefaultTypes() {
	final HashMap<Class, Class<? extends Converter>> EXPECTED_CONVERTERS = new HashMap<Class, Class<? extends Converter>>() {
		{
		put(int.class, PrimitiveIntConverter.class);
		put(long.class, PrimitiveLongConverter.class);
		put(short.class, PrimitiveShortConverter.class);
		put(byte.class, PrimitiveByteConverter.class);
		put(double.class, PrimitiveDoubleConverter.class);
		put(float.class, PrimitiveFloatConverter.class);
		put(boolean.class, PrimitiveBooleanConverter.class);
		put(Integer.class, IntegerConverter.class);
		put(Long.class, LongConverter.class);
		put(Short.class, ShortConverter.class);
		put(Byte.class, ByteConverter.class);
		put(Double.class, DoubleConverter.class);
		put(Float.class, FloatConverter.class);
		put(Boolean.class, BooleanConverter.class);
		put(Calendar.class, LocaleBasedCalendarConverter.class);
		put(Date.class, LocaleBasedDateConverter.class);
		put(Enum.class, EnumConverter.class);
		}
		private static final long serialVersionUID = 8559316558416038474L;
	};

	for (Class<? extends Converter> converterType : EXPECTED_CONVERTERS.values()) {
		Converter<?> expected = mock(converterType);
		when((Converter)container.instanceFor(converterType)).thenReturn(expected);
	}

	for (Entry<Class, Class<? extends Converter>> entry : EXPECTED_CONVERTERS.entrySet()) {
		Class<?> typeFor = entry.getKey();
		Class<? extends Converter> converterType = entry.getValue();
		Converter<?> converter = converters.to(typeFor);
		assertThat(converter, is(instanceOf(converterType)));
	}
	}

	@Test(expected = VRaptorException.class)
	public void complainsIfNoConverterFound() {
	converters.to(DefaultConvertersTest.class);
	}

	@Test(expected = VRaptorException.class)
	public void convertingANonAnnotatedConverterEndsUpComplaining() {
	converters.register(WrongConverter.class);
	}

	class WrongConverter implements Converter<String> {

	public String convert(String value, Class<? extends String> type, ResourceBundle bundle) {
		return null;
	}
	}

	class MyData {
	}

	@Convert(MyData.class)
	class MyConverter implements Converter<MyData> {
	public MyData convert(String value, Class<? extends MyData> type, ResourceBundle bundle) {
		return null;
	}
	}

	@Convert(MyData.class)
	class MySecondConverter implements Converter<MyData> {
	public MyData convert(String value, Class<? extends MyData> type, ResourceBundle bundle) {
		return null;
	}
	}

	@Test
	public void registersAndUsesTheConverterInstaceForTheSpecifiedType() {
	converters.register(MyConverter.class);
	when(container.instanceFor(MyConverter.class)).thenReturn(new MyConverter());

	Converter<?> found = converters.to(MyData.class);
	assertThat(found.getClass(), is(typeCompatibleWith(MyConverter.class)));
	}

	@Test
	public void usesTheLastConverterInstanceRegisteredForTheSpecifiedType() {
	converters.register(MyConverter.class);
	converters.register(MySecondConverter.class);
	when(container.instanceFor(MySecondConverter.class)).thenReturn(new MySecondConverter());

	Converter<?> found = converters.to(MyData.class);
	assertThat(found.getClass(), is(typeCompatibleWith(MySecondConverter.class)));
	}

	@Test
	public void existsForWillReturnTrueForRegisteredConverters() throws Exception {
		converters.register(MyConverter.class);

		when(container.instanceFor(MyConverter.class)).thenReturn(new MyConverter());

		assertTrue(converters.existsFor(MyData.class));
	}

}