package org.openapitools.configuration;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import org.springframework.web.util.UriComponentsBuilder;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.paths.Paths;
import springfox.documentation.spring.web.paths.RelativePathProvider;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.Optional;
import javax.annotation.Generated;
import javax.servlet.ServletContext;

@Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
@Configuration
@EnableSwagger2
public class SpringFoxConfiguration {

    ApiInfo apiInfo() {
        return new ApiInfoBuilder()
            .title("OpenAPI Petstore")
            .description("This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\")
            .license("Apache-2.0")
            .licenseUrl("https://www.apache.org/licenses/LICENSE-2.0.html")
            .termsOfServiceUrl("")
            .version("1.0.0")
            .contact(new Contact("","", ""))
            .build();
    }

    @Bean
    public Docket customImplementation(ServletContext servletContext, @Value("${openapi.openAPIPetstore.base-path:/v2}") String basePath) {
        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                    .apis(RequestHandlerSelectors.basePackage("org.openapitools.api"))
                    .build()
                .pathProvider(new BasePathAwareRelativePathProvider(servletContext, basePath))
                .directModelSubstitute(java.time.LocalDate.class, java.sql.Date.class)
                .directModelSubstitute(java.time.OffsetDateTime.class, java.util.Date.class)
                .genericModelSubstitutes(Optional.class)
                .apiInfo(apiInfo());
    }

    class BasePathAwareRelativePathProvider extends RelativePathProvider {
        private String basePath;

        public BasePathAwareRelativePathProvider(ServletContext servletContext, String basePath) {
            super(servletContext);
            this.basePath = basePath;
        }

        @Override
        protected String applicationPath() {
            return  Paths.removeAdjacentForwardSlashes(UriComponentsBuilder.fromPath(super.applicationPath()).path(basePath).build().toString());
        }

        @Override
        public String getOperationPath(String operationPath) {
            UriComponentsBuilder uriComponentsBuilder = UriComponentsBuilder.fromPath("/");
            return Paths.removeAdjacentForwardSlashes(
                    uriComponentsBuilder.path(operationPath.replaceFirst("^" + basePath, "")).build().toString());
        }
    }

}
