/*
    * Copyright 2022 the original author or authors.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.bremersee.apiclient.webflux.contract.spring;
  
  import java.util.function.Function;
  import org.bremersee.apiclient.webflux.Invocation;
  import org.springframework.util.StringUtils;
  import org.springframework.web.bind.annotation.DeleteMapping;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.PatchMapping;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.PutMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  
  /**
   * The request path resolver.
   *
   * @author Christian Bremer
   */
  public class RequestPathResolver implements Function<Invocation, String> {
  
    @Override
    public String apply(Invocation invocation) {
      // Request mapping on class
      String clsPath = invocation
          .findAnnotationValueOnTargetClass(
              RequestMapping.class, a -> a.value().length > 0, a -> a.value()[0])
          .orElse("");
  
      // Request mapping on method
      String path = invocation
          .findAnnotationValueOnMethod(
              RequestMapping.class, a -> a.value().length > 0, a -> a.value()[0])
          .orElse("");
      if (StringUtils.hasText(path)) {
        return clsPath + path;
      }
  
      // Get mapping on method
      path = invocation
          .findAnnotationValueOnMethod(
              GetMapping.class, a -> a.value().length > 0, a -> a.value()[0])
          .orElse("");
      if (StringUtils.hasText(path)) {
        return clsPath + path;
      }
  
      // Post mapping on method
      path = invocation
          .findAnnotationValueOnMethod(
              PostMapping.class, a -> a.value().length > 0, a -> a.value()[0])
          .orElse("");
      if (StringUtils.hasText(path)) {
        return clsPath + path;
      }
  
      // Put mapping on method
      path = invocation
          .findAnnotationValueOnMethod(
              PutMapping.class, a -> a.value().length > 0, a -> a.value()[0])
          .orElse("");
      if (StringUtils.hasText(path)) {
        return clsPath + path;
      }
  
      // Patch mapping on method
      path = invocation
          .findAnnotationValueOnMethod(
              PatchMapping.class, a -> a.value().length > 0, a -> a.value()[0])
          .orElse("");
      if (StringUtils.hasText(path)) {
        return clsPath + path;
      }
  
      // Delete mapping on method
      path = invocation
          .findAnnotationValueOnMethod(
              DeleteMapping.class, a -> a.value().length > 0, a -> a.value()[0])
          .orElse("");
      return clsPath + path;
    }
  }