<%#
 Copyright 2013-2021 the original author or authors from the JHipster project.

 This file is part of the JHipster project, see https://www.jhipster.tech/
 for more information.

 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

      https://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 <%=packageName%>.config;

import tech.jhipster.config.JHipsterConstants;
import tech.jhipster.config.JHipsterProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.http.CacheControl;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.concurrent.TimeUnit;

@Configuration
@Profile({JHipsterConstants.SPRING_PROFILE_PRODUCTION})
public class StaticResourcesWebConfiguration implements WebMvcConfigurer {

    protected static final String[] RESOURCE_LOCATIONS = new String[]{"classpath:/static/", "classpath:/static/content/", "classpath:/static/i18n/"};
    protected static final String[] RESOURCE_PATHS = new String[]{"/*.js", "/*.css", "/*.svg", "/*.png", "*.ico", "/content/**", "/i18n/*"};

    private final JHipsterProperties jhipsterProperties;

    public StaticResourcesWebConfiguration(JHipsterProperties jHipsterProperties) {
        this.jhipsterProperties = jHipsterProperties;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        ResourceHandlerRegistration resourceHandlerRegistration = appendResourceHandler(registry);
        initializeResourceHandler(resourceHandlerRegistration);
    }

    protected ResourceHandlerRegistration appendResourceHandler(ResourceHandlerRegistry registry) {
        return registry.addResourceHandler(RESOURCE_PATHS);
    }

    protected void initializeResourceHandler(ResourceHandlerRegistration resourceHandlerRegistration) {
        resourceHandlerRegistration.addResourceLocations(RESOURCE_LOCATIONS).setCacheControl(getCacheControl());
    }

    protected CacheControl getCacheControl() {
        return CacheControl.maxAge(getJHipsterHttpCacheProperty(), TimeUnit.DAYS).cachePublic();
    }

    private int getJHipsterHttpCacheProperty() {
        return jhipsterProperties.getHttp().getCache().getTimeToLiveInDays();
    }

}