package com.hb.proj;

import java.util.Arrays;
import java.util.List;

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.format.FormatterRegistry;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class SpringMvcConfigurer implements WebMvcConfigurer {

	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
		WebMvcConfigurer.super.addResourceHandlers(registry);
	}
	
	@Override
	public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
		resolvers.add(new CustomMethodArgumentResolver());
		WebMvcConfigurer.super.addArgumentResolvers(resolvers);
	}

	@Override
	public void addFormatters(FormatterRegistry registry) {
		registry.addConverter(new StringToDateConverter());
		WebMvcConfigurer.super.addFormatters(registry);
	}
	
    @Bean
    public FilterRegistrationBean<CorsFilter> corsFilter() {
        // 跨域配置
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(Arrays.asList("*"));
        configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "HEAD", "DELETE", "OPTION"));
        configuration.setAllowedHeaders(Arrays.asList("*"));
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);

        // 有多个filter时此处可设置改CorsFilter的优先执行顺序，保证CorsFilter在其他过滤器之前执行（避免其他过滤器执行异常，导致CorsFilter没执行，从而导致跨域失效）
        FilterRegistrationBean<CorsFilter> bean = new FilterRegistrationBean<>(new CorsFilter(source));
        bean.setOrder(Ordered.HIGHEST_PRECEDENCE);
        return bean;
    }


}