@Configuration
@EnableCaching
public class CommonConfig implements WebMvcConfigurer {
    //theme
    /**
     * ResourceBundleThemeSource
     * @return themeSource
     */
    @Bean
    public ThemeSource themeSource() {
        ResourceBundleThemeSource themeSource = new ResourceBundleThemeSource();
        themeSource.setBasenamePrefix("themes.style_");
        return themeSource;
    }
    /**
     * SessionThemeResolver
     * @return themeResolver
     */
    @Bean
    public SessionThemeResolver sessionThemeResolver() {
        SessionThemeResolver themeResolver = new SessionThemeResolver();
        themeResolver.setDefaultThemeName("default");
        return themeResolver;
    }
    /**
     * CookieThemeResolver
     * @return resolver
     */
    @Bean
    public CookieThemeResolver themeResolver(){
        CookieThemeResolver resolver = new CookieThemeResolver();
        resolver.setCookieMaxAge(31536000);
        resolver.setDefaultThemeName("default");
        return resolver;
    }
    /**
     * ThemeChangeInterceptor
     * @return ThemeChangeInterceptor
     */
    @Bean
    public ThemeChangeInterceptor themeChangeInterceptor(){
        return new ThemeChangeInterceptor();
    }

    //message
    /**
     * MessageSource
     * @return MessageSource
     */
    @Bean
    public MessageSource messageSource() {
        System.out.println("CacheConfiguration.messageSource()");
        ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
        //must be this style
        messageSource.setBasename("classpath:language/Language");
        return messageSource;
    }
    /**
     * SessionLocaleResolver
     * @return SessionLocaleResolver
     */
    @Bean(name="localeResolver")
    public SessionLocaleResolver sessionLocaleResolver() {
        System.out.println("CacheConfiguration.sessionLocaleResolver()");
        return new SessionLocaleResolver();
    }
    /**
     * LocaleChangeInterceptor
     * @return LocaleChangeInterceptor
     */
    @Bean
    public LocaleChangeInterceptor localeChangeInterceptor(){
        System.out.println("LocaleChangeInterceptor");
        LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
        lci.setParamName("lang");
        return lci;
    }
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(themeChangeInterceptor());
        registry.addInterceptor(localeChangeInterceptor());
    }
}