package cn.com.goldenwater.dcproj.config;


import cn.com.goldenwater.dcproj.constValue.SplitValue;
import com.google.common.base.Function;
import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import springfox.documentation.RequestHandler;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;


@Configuration
@EnableSwagger2
public class SwaggerConfig extends WebMvcConfigurerAdapter {

    @Value("${swagger.enable}")
    private boolean enable;
    @Override

    public void addResourceHandlers(ResourceHandlerRegistry registry) {

        registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");

        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");

    }
    @Value("${targetPackage}")
    private String targetPackage;
    @Bean
    public Docket dc_api() {
        String basePackage = "cn.com.goldenwater.dcproj.controller.";
        if(enable) {
            if (!targetPackage.startsWith(SplitValue.FENHAO_SPLIT)) {
                targetPackage = SplitValue.FENHAO_SPLIT + targetPackage;
                basePackage = targetPackage.replace(SplitValue.FENHAO_SPLIT, SplitValue.FENHAO_SPLIT + basePackage);
            }
            if (basePackage.startsWith(SplitValue.FENHAO_SPLIT)) {
                basePackage = basePackage.substring(1);
            }
        }
        return getDocket("督查全部api",basePackage+";com.workflow.bpm.api.bpmservices","系统全部api接口");
    }


    private Docket getDocket(String groupName,String basePackage,String desc){
        return new Docket(DocumentationType.SWAGGER_2).enable(enable)
                .groupName(groupName)
                .select()
                .apis(basePackage(basePackage))
                .paths(PathSelectors.any())
                .build()
                .apiInfo(apiInfo(desc));
    }


    public static Predicate<RequestHandler> basePackage(final String basePackage) {
        return input -> declaringClass(input).transform(handlerPackage(basePackage)).or(true);
    }

    private static Function<Class<?>, Boolean> handlerPackage(final String basePackage)     {
        return input -> {
            // 循环判断匹配
            for (String strPackage : basePackage.split(SplitValue.FENHAO_SPLIT)) {
                boolean isMatch = input.getPackage().getName().startsWith(strPackage);
                if (isMatch) {
                    return true;
                }
            }
            return false;
        };
    }

    private static Optional<? extends Class<?>> declaringClass(RequestHandler input) {
        return Optional.fromNullable(input.declaringClass());
    }


    private ApiInfo apiInfo(String desc) {

        return new ApiInfoBuilder()

                .title("督查项目API")

                .description(desc)

                .version("0.0.1")

                .termsOfServiceUrl("http://www.goldenwater.com.cn")

                .license("LICENSE")

                .licenseUrl("http://www.goldenwater.com.cn")

                .build();

    }


}