package cn.timer.api.config.swagger;

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

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;

import com.github.xiaoymin.knife4j.spring.annotations.EnableKnife4j;

import springfox.bean.validators.configuration.BeanValidatorPluginsConfiguration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
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;

@Configuration // 声明为配置文件，让spring加载
@EnableSwagger2 // 支持swagger2插件配置
@EnableKnife4j
@Import(BeanValidatorPluginsConfiguration.class)
public class Swagger2Config {

	// apiInfo对象主要是设置我们api文档的标题，描述，访问的地址，创建者等信息
	@SuppressWarnings("deprecation")
	@Bean
	public ApiInfo apiInfo() {
		return new ApiInfoBuilder()
				.title("8小时-Api接口文档")
				.description("快速进行Api接口调试")
				.termsOfServiceUrl("127.0.0.1:8080")
				.contact("subject")
				.version("1.0")
				.build();
	}

	/**
	 * 创建API
	 */
	@Bean
	public Docket createRestApi() {
		return new Docket(DocumentationType.SWAGGER_2)
				// .pathMapping("/dev-api")
				// 用来创建该API的基本信息，展示在文档的页面中（自定义展示的信息）
				.apiInfo(apiInfo())
				// 设置哪些接口暴露给Swagger展示
				.select()
				// 扫描所有有注解的api，用这种方式更灵活
				// .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
				// 扫描指定包中的swagger注解
				.apis(RequestHandlerSelectors.basePackage("cn.timer.api"))
				// 扫描所有 .apis(RequestHandlerSelectors.any())
				.paths(PathSelectors.any()).build()
				/* 设置安全模式，swagger可以设置访问token */
				.securitySchemes(securitySchemes()).securityContexts(securityContexts());
	}

	/**
	 * 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;
	}

}