/*
 * Copyright 2002-2016 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.security.samples.mvc.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.core.Ordered;
import org.springframework.data.repository.support.DomainClassConverter;
import org.springframework.format.support.FormattingConversionService;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.spring4.SpringTemplateEngine;
import org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templatemode.TemplateMode;

@EnableWebMvc
@ComponentScan("org.springframework.security.samples.mvc")
public class WebMvcConfiguration extends WebMvcConfigurerAdapter {

	@Autowired
	private ApplicationContext applicationContext;

	@Autowired
	private FormattingConversionService mvcConversionService;

	@Override
	public void addViewControllers(ViewControllerRegistry registry) {
		registry.addViewController("/login").setViewName("login");
		registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
	}

	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		registry.addResourceHandler("/resources/**").addResourceLocations("classpath:/resources/")
				.setCachePeriod(31556926);
		registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
	}

	@Bean
	public ViewResolver viewResolver() {
		ThymeleafViewResolver resolver = new ThymeleafViewResolver();
		resolver.setTemplateEngine(templateEngine());
		resolver.setCharacterEncoding("UTF-8");
		return resolver;
	}

	@Bean
	public TemplateEngine templateEngine() {
		SpringTemplateEngine engine = new SpringTemplateEngine();
		engine.setEnableSpringELCompiler(true);
		engine.setTemplateResolver(templateResolver());
		return engine;
	}

	private SpringResourceTemplateResolver templateResolver() {
		SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
		resolver.setPrefix("classpath:/views/");
		resolver.setSuffix(".html");
		resolver.setTemplateMode(TemplateMode.HTML);
		resolver.setApplicationContext(applicationContext);
		return resolver;
	}

	@Bean
	public DomainClassConverter<?> domainClassConverter() {
		return new DomainClassConverter<FormattingConversionService>(mvcConversionService);
	}
}
