/*
 * Copyright 2002-2017 the original author or authors.
 *
 * 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 org.springframework.web.reactive.result.view;

import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;

import org.junit.Test;

import org.springframework.http.HttpHeaders;
import org.springframework.ui.ExtendedModelMap;
import org.springframework.ui.Model;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;


/**
 * Unit tests for {@link DefaultRenderingBuilder}.
 * @author Rossen Stoyanchev
 */
public class DefaultRenderingBuilderTests {


	@Test
	public void defaultValues() {
		Rendering rendering = Rendering.view("abc").build();

		assertEquals("abc", rendering.view().orElse(null));
		assertEquals(Collections.emptyMap(), rendering.modelAttributes());
		assertNull(rendering.status().orElse(null));
		assertEquals(0, rendering.headers().size());
	}

	@Test
	public void defaultValuesForRedirect() throws Exception {
		Rendering rendering = Rendering.redirectTo("abc").build();

		Object view = rendering.view().orElse(null);
		assertEquals(RedirectView.class, view.getClass());
		assertEquals("abc", ((RedirectView) view).getUrl());
		assertTrue(((RedirectView) view).isContextRelative());
		assertFalse(((RedirectView) view).isPropagateQuery());
	}


	@Test
	public void viewName() {
		Rendering rendering = Rendering.view("foo").build();
		assertEquals("foo", rendering.view().orElse(null));
	}

	@Test
	public void modelAttribute() throws Exception {
		Foo foo = new Foo();
		Rendering rendering = Rendering.view("foo").modelAttribute(foo).build();

		assertEquals(Collections.singletonMap("foo", foo), rendering.modelAttributes());
	}

	@Test
	public void modelAttributes() throws Exception {
		Foo foo = new Foo();
		Bar bar = new Bar();
		Rendering rendering = Rendering.view("foo").modelAttributes(foo, bar).build();

		Map<String, Object> map = new LinkedHashMap<>(2);
		map.put("foo", foo);
		map.put("bar", bar);
		assertEquals(map, rendering.modelAttributes());
	}

	@Test
	public void model() throws Exception {
		Map<String, Object> map = new LinkedHashMap<>();
		map.put("foo", new Foo());
		map.put("bar", new Bar());
		Rendering rendering = Rendering.view("foo").model(map).build();

		assertEquals(map, rendering.modelAttributes());
	}

	@Test
	public void header() throws Exception {
		Rendering rendering = Rendering.view("foo").header("foo", "bar").build();

		assertEquals(1, rendering.headers().size());
		assertEquals(Collections.singletonList("bar"), rendering.headers().get("foo"));
	}

	@Test
	public void httpHeaders() throws Exception {
		HttpHeaders headers = new HttpHeaders();
		headers.add("foo", "bar");
		Rendering rendering = Rendering.view("foo").headers(headers).build();

		assertEquals(headers, rendering.headers());
	}

	@Test
	public void redirectWithAbsoluteUrl() throws Exception {
		Rendering rendering = Rendering.redirectTo("foo").contextRelative(false).build();

		Object view = rendering.view().orElse(null);
		assertEquals(RedirectView.class, view.getClass());
		assertFalse(((RedirectView) view).isContextRelative());
	}

	@Test
	public void redirectWithPropagateQuery() throws Exception {
		Rendering rendering = Rendering.redirectTo("foo").propagateQuery(true).build();

		Object view = rendering.view().orElse(null);
		assertEquals(RedirectView.class, view.getClass());
		assertTrue(((RedirectView) view).isPropagateQuery());
	}


	private static class Foo {}

	private static class Bar {}

}