<dependency>
    <groupId>com.github.xiaoymin</groupId>
    <artifactId>knife4j-spring-boot-starter</artifactId>
    <version>3.0</version>
</dependency>

<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-boot-starter</artifactId>
    <version>3.0.0</version>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>2.2.10.RELEASE</version>
</dependency>

@Slf4j
@Configuration
@EnableOpenApi
@EnableKnife4j
@EnableConfigurationProperties({CustomerSwaggerProperties.class})
public class SwaggerAutoConfiguration {

	@Bean
	@ConditionalOnProperty(name = "xxx.xxx.swagger.enabled",havingValue = "true")
	public SecurityBasicAuthFilter securityBasicAuthFilter(CustomerSwaggerProperties customerSwaggerProperties){
		return new SecurityBasicAuthFilter(
				customerSwaggerProperties.getSecurity().isEnabled(),
				customerSwaggerProperties.getSecurity().getUsername(),
				customerSwaggerProperties.getSecurity().getPassword());
	}

	@Bean
	@ConditionalOnMissingBean
	public Docket createRestApi(CustomerSwaggerProperties properties) {
		return new Docket(DocumentationType.OAS_30)
				.enable(properties.isEnabled())
				.apiInfo(apiInfo(properties))
				.select()
				.apis(RequestHandlerSelectors.basePackage(properties.getBasePackage()))
				.apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
				.paths(PathSelectors.any())
				.build()
				.securitySchemes(security(properties.getApiInfo().getAuthorizationHeaderName()))
				.securityContexts(securityContexts(properties.getApiInfo().getAuthorizationHeaderName()));
	}

	private List<SecurityContext> securityContexts(String authorizationHeaderName) {
		return Arrays.asList(
				SecurityContext.builder()
						.securityReferences(defaultAuth(authorizationHeaderName))
						.forPaths(PathSelectors.regex("^(?!auth).*$"))
						.build()
		);

	}

	private List<SecurityReference> defaultAuth(String authorizationHeaderName) {
		AuthorizationScope authorizationScope = new AuthorizationScope("global", "accessEverything");
		AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];
		authorizationScopes[0] = authorizationScope;
		return Arrays.asList(
				new SecurityReference(authorizationHeaderName, authorizationScopes));
	}


	private List<SecurityScheme> security(String authorizationHeaderName) {
		return Arrays.asList(
				new ApiKey(authorizationHeaderName, authorizationHeaderName, "header")
		);
	}

	private ApiInfo apiInfo(CustomerSwaggerProperties properties) {
		return new ApiInfoBuilder()
				.title(properties.getApiInfo().getTitle())
				.description(properties.getApiInfo().getDescription())
				//.termsOfServiceUrl("http://terms-of-services.url")
				.version(properties.getApiInfo().getVersion())
				.build();
	}
}