package com.baeldung.cache;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.CacheControl;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.mvc.WebContentInterceptor;

import java.util.concurrent.TimeUnit;

@EnableWebMvc
@Configuration
@ComponentScan(basePackages = {"com.baeldung.cache"})
public class WebConfig implements WebMvcConfigurer {

    @Override
    public void addViewControllers(final ViewControllerRegistry registry) {
        registry.addViewController("/").setViewName("index");
    }

    @Override
    public void addResourceHandlers(final ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/")
          .setCacheControl(CacheControl.maxAge(60, TimeUnit.SECONDS)
            .noTransform()
            .mustRevalidate());
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        WebContentInterceptor interceptor = new WebContentInterceptor();
        interceptor.addCacheMapping(CacheControl.maxAge(60, TimeUnit.SECONDS)
          .noTransform()
          .mustRevalidate(), "/cache/*");
        registry.addInterceptor(interceptor);
    }
}