/*
 *    Copyright (c) 2018-2025, lengleng All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * Neither the name of the pig4cloud.com developer nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * Author: lengleng (wangiegie@gmail.com)
 */

package com.pig4cloud.pigx.gateway.config;

import lombok.AllArgsConstructor;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionRepository;
import org.springframework.cloud.gateway.support.NameUtils;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;
import springfox.documentation.swagger.web.SwaggerResource;
import springfox.documentation.swagger.web.SwaggerResourcesProvider;

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

/**
 * @author Sywd
 * 聚合接口文档注册，和zuul实现类似
 */
@Component
@Primary
@AllArgsConstructor
public class SwaggerProvider implements SwaggerResourcesProvider {
	private static final String API_URI = "/v2/api-docs";
	private final RouteDefinitionRepository routeDefinitionRepository;


	@Override
	public List<SwaggerResource> get() {
		List<SwaggerResource> resources = new ArrayList<>();
		List<RouteDefinition> routes = new ArrayList<>();
		routeDefinitionRepository.getRouteDefinitions().subscribe(route -> routes.add(route));
		routes.forEach(routeDefinition -> routeDefinition.getPredicates().stream()
			.filter(predicateDefinition -> "Path".equalsIgnoreCase(predicateDefinition.getName()))
			.filter(predicateDefinition -> !"pigx-auth".equalsIgnoreCase(routeDefinition.getId()))
			.forEach(predicateDefinition -> resources.add(swaggerResource(routeDefinition.getId(),
				predicateDefinition.getArgs().get(NameUtils.GENERATED_NAME_PREFIX + "0")
					.replace("/**", API_URI)))));

		return resources;
	}

	private SwaggerResource swaggerResource(String name, String location) {
		SwaggerResource swaggerResource = new SwaggerResource();
		swaggerResource.setName(name);
		swaggerResource.setLocation(location);
		swaggerResource.setSwaggerVersion("2.0");
		return swaggerResource;
	}
}
