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package cn.mklaus.framework.config;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.List;

import static com.alibaba.fastjson.serializer.SerializerFeature.WriteNullBooleanAsFalse;
import static com.alibaba.fastjson.serializer.SerializerFeature.WriteNullListAsEmpty;
import static com.alibaba.fastjson.serializer.SerializerFeature.WriteNullNumberAsZero;

/**
 * @author Mklaus
 * Created on 2018-01-03 下午3:08
 */
@EnableConfigurationProperties(AutoConfigurationProperties.class)
@Configuration
public class BaseWebMvcConfiguration extends WebMvcConfigurerAdapter {

    private static final Logger logger = LoggerFactory.getLogger(BaseWebMvcConfiguration.class);

    @Resource
    private AutoConfigurationProperties properties;

    @Override
    public void configureMessageConverters(List> converters) {
        super.configureMessageConverters(converters);

        // 放在FastJsonHttpMessageConverter前面，避免返回String被FastJsonHttpMessageConverter线装换，多了双引号问题
        StringHttpMessageConverter stringHttpMessageConverter = new StringHttpMessageConverter();
        converters.add(stringHttpMessageConverter);

        // 转换JSON
        logger.info("Configure json message converter");
        //1.需要定义一个convert转换消息的对象;
        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
        //2.添加fastJson的配置信息，比如：是否要格式化返回的json数据;
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(WriteNullNumberAsZero, WriteNullListAsEmpty, WriteNullBooleanAsFalse, SerializerFeature.PrettyFormat);
        //3处理中文乱码问题
        List fastMediaTypes = new ArrayList<>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        //4.在convert中添加配置信息.
        fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);
        fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);
        //5.将convert添加到converters当中.
        converters.add(fastJsonHttpMessageConverter);
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        logger.info("Add resource handlers");
        if (properties.isUseDefaultResourceHandler()) {
            registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
            registry.addResourceHandler("/resources/**").addResourceLocations("classpath:/static/");
        }
        super.addResourceHandlers(registry);
    }

}