package com.zhgd.config;

import com.google.common.base.Function;
import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.RequestHandler;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.ApiKey;
import springfox.documentation.service.AuthorizationScope;
import springfox.documentation.service.SecurityReference;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.contexts.SecurityContext;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.ArrayList;
import java.util.List;


/**
 * @program: Iot
 * @description: Swagger配置类
 * @author: Mr.Wang
 * @create: 2019-04-16 14:46
 **/
@Configuration
@EnableSwagger2
@ConditionalOnProperty(name = "swagger.enable", havingValue = "true")
public class SwaggerConfig {
    // 定义分隔符
    private static final String splitor = ";";

    @Bean
    public Docket createZwRestApi() {
        return new Docket(DocumentationType.SWAGGER_2).groupName("2.政务接口").apiInfo(apiInfo("政务管理API", "政务前后端联调api文档", "1.0")).select()
                //.apis(RequestHandlerSelectors.basePackage("com.zhgd.xmgl"))
                .apis(basePackage("com.zhwl.zw")).paths(PathSelectors.any())
                //.paths(PathSelectors.regex("/zw.*"))
                .build();
    }

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2).groupName("1.项目接口").apiInfo(apiInfo("项目管理API", "项目前后端联调api文档", "1.0")).select()
                //.apis(RequestHandlerSelectors.basePackage("com.zhgd.xmgl"))
                .apis(basePackage("com.zhgd.xmgl"))
                //.apis(basePackage("com.zhgd.xmgl"+splitor+"com.zhgd.xmgl.device"))
                .paths(PathSelectors.any())

                //.paths(PathSelectors.regex("/xmgl.*"))
                .build()
                /* 设置安全模式，swagger可以设置访问token */.securitySchemes(securitySchemes()).securityContexts(securityContexts());
    }

    private ApiInfo apiInfo(String titleName, String description, String version) {
        return new ApiInfoBuilder().title(titleName).description(description).version(version).build();
    }

    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(splitor)) {
                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());
    }

    /**
     * 安全模式，这里指定token通过Authorization头请求头传递
     */
    private List<ApiKey> securitySchemes() {
        List<ApiKey> apiKeyList = new ArrayList<ApiKey>();
        apiKeyList.add(new ApiKey("Authorization", "Authorization", "header"));
        return apiKeyList;
    }

    /**
     * 安全上下文
     */
    private List<SecurityContext> securityContexts() {
        List<SecurityContext> securityContexts = new ArrayList<>();
        securityContexts.add(SecurityContext.builder().securityReferences(defaultAuth()).forPaths(PathSelectors.regex("^(?!auth).*$")).build());
        return securityContexts;
    }

    /**
     * 默认的安全上引用
     */
    private List<SecurityReference> defaultAuth() {
        AuthorizationScope authorizationScope = new AuthorizationScope("global", "accessEverything");
        AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];
        authorizationScopes[0] = authorizationScope;
        List<SecurityReference> securityReferences = new ArrayList<>();
        securityReferences.add(new SecurityReference("Authorization", authorizationScopes));
        return securityReferences;
    }
}