package cn.cetc54.platform.config.swagger;

import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.*;
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;

/**
 *
 */
@Slf4j
@Configuration
@EnableSwagger2
public class Swagger2Config {

    @Value("${swagger.title:Platform}")
    private String title;

    @Value("${swagger.description:Api Documentation}")
    private String description;

    @Value("${swagger.version:1.0}")
    private String version;

    @Value("${swagger.termsOfServiceUrl:http://xxx}")
    private String termsOfServiceUrl;

    @Value("${swagger.contact.name:xx}")
    private String name;

    @Value("${swagger.contact.url:http://xx}")
    private String url;

    @Value("${swagger.contact.email:xx}")
    private String email;

    private List<ApiKey> securitySchemes() {
        List<ApiKey> apiKeys = new ArrayList<>();
        apiKeys.add(new ApiKey("Authorization", "accessToken", "header"));
        return apiKeys;
    }

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

    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;
    }

    @Bean
    public Docket createRestApi() {

        log.info("加载Swagger2");

        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo()).select()
                // 扫描所有有注解的api，用这种方式更灵活
                .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
                .paths(PathSelectors.any())
                .build()
                .securitySchemes(securitySchemes())
                .securityContexts(securityContexts());
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title(title)
                .description(description)
                .termsOfServiceUrl(termsOfServiceUrl)
                .contact(new Contact(name, url, email))
                .version(version)
                .build();
    }
}