package com.smartearth.poiexcel.config;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.servlet.config.annotation.*;

import java.nio.charset.StandardCharsets;
import java.util.List;

/**
 * Web配置类
 * @author WWW
 */
@Configuration
public class WebConfig extends WebMvcConfigurationSupport {
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        // 设置访问路径为 “/” 跳转到指定页面
        registry.addViewController("/").setViewName("redirect:/swagger-ui.html");
        // 设置为最高优先级
        registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
    }

    /**
     * swagger控制
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
        registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/**").addResourceLocations("classpath:/static/");
        super.addResourceHandlers(registry);
    }

    /**
     * 忽略url地址大小写
     */
    @Override
    protected void configurePathMatch(PathMatchConfigurer configurer) {
        AntPathMatcher matcher = new AntPathMatcher();
        matcher.setCaseSensitive(false);

        configurer.setPathMatcher(matcher);
    }

    /**
     * 跨域请求
     */
    @Override
    protected void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowCredentials(true)
                .allowedOrigins("*")
                .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
                .allowedHeaders("*")
                .maxAge(3600);
    }

    /**
     * 添加统一的拦截器
     */
    @Override
    protected void addInterceptors(InterceptorRegistry registry) {
        super.addInterceptors(registry);
    }

    /**
     * 处理json格式，值null的转换为""
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
        FastJsonConfig config = new FastJsonConfig();
        config.setSerializerFeatures(
                SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteMapNullValue,
                //SerializerFeature.WriteNullStringAsEmpty,
                SerializerFeature.WriteNullNumberAsZero,
                SerializerFeature.WriteNullBooleanAsFalse);
        // 结果是否格式化,默认为false
        //SerializerFeature.PrettyFormat);

        converter.setFastJsonConfig(config);
        converter.setDefaultCharset(StandardCharsets.UTF_8);
        converters.add(converter);
    }
}