package com.zhitan.web.core.config;

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

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.zhitan.common.config.BaseConfig;
import io.swagger.annotations.ApiOperation;
import io.swagger.models.auth.In;
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.Contact;
import springfox.documentation.service.SecurityReference;
import springfox.documentation.service.SecurityScheme;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.contexts.SecurityContext;
import springfox.documentation.spring.web.plugins.Docket;

import javax.annotation.Resource;

/**
 * Swagger2的接口配置
 *
 * @author zhitan
 */
@Configuration
public class SwaggerConfig {
    /**
     * 系统基础配置
     */
    @Resource
    private BaseConfig baseConfig;

    /**
     * 是否开启swagger
     */
    @Value("${swagger.enabled}")
    private boolean enabled;

    /**
     * 设置请求的统一前缀
     */
    @Value("${swagger.pathMapping}")
    private String pathMapping;

    /**
     * 创建API
     */
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.OAS_30)
                // 是否启用Swagger
                .enable(enabled)
                // 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("com.zhitan.project.tool.swagger"))
                // 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())
                .pathMapping(pathMapping);
    }

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

    /**
     * 安全上下文
     */
    private List<SecurityContext> securityContexts() {
        List<SecurityContext> securityContexts = new ArrayList<>();
        securityContexts.add(
                SecurityContext.builder()
                        .securityReferences(defaultAuth())
                        .operationSelector(o -> o.requestMappingPattern().matches("/.*"))
                        .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;
    }

    /**
     * 添加摘要信息
     */
    private ApiInfo apiInfo() {
        // 用ApiInfoBuilder进行定制
        return new ApiInfoBuilder()
                // 设置标题
                .title("智碳_能源管理系统_接口文档")
                // 描述
                .description("采集企业水、电、气、热等能耗数据；帮助企业建立能源管理体系，找到跑冒滴漏，为企业节能提供数据支撑；为企业实现碳跟踪、碳盘查、碳交易、碳汇报的全生命过程；为中国碳达峰-碳中和做出贡献！")
                // 作者信息
                .contact(new Contact(baseConfig.getName(), "https://www.zhitancloud.com", "yin.cun@qq.com"))
                // 版本
                .version("版本号:" + baseConfig.getVersion())
                .build();
    }
}