/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.hc.core5.http.message;
  
  import java.net.URI;
  import java.net.URISyntaxException;
  
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.HttpRequest;
  import org.apache.hc.core5.http.Method;
  import org.apache.hc.core5.http.ProtocolVersion;
  import org.apache.hc.core5.http.URIScheme;
  import org.apache.hc.core5.net.URIAuthority;
  import org.apache.hc.core5.util.Args;
  import org.apache.hc.core5.util.TextUtils;
  
  /**
   * Basic implementation of {@link HttpRequest}.
   *
   * @since 4.0
   */
  public class BasicHttpRequest extends HeaderGroup implements HttpRequest {
  
      private static final long serialVersionUID = 1L;
  
      private final String method;
      private String path;
      private String scheme;
      private URIAuthority authority;
      private ProtocolVersion version;
      private URI requestUri;
      private boolean absoluteRequestUri;
  
      /**
       * Creates request message with the given method, host and request path.
       *
       * @param method request method.
       * @param scheme request scheme.
       * @param authority request authority.
       * @param path request path.
       *
       * @since 5.1
       */
      public BasicHttpRequest(final String method, final String scheme, final URIAuthority authority, final String path) {
          super();
          this.method = Args.notNull(method, "Method name");
          this.scheme = scheme;
          this.authority = authority;
          this.path = path;
      }
  
      /**
       * Creates request message with the given method and request path.
       *
       * @param method request method.
       * @param path request path.
       */
      public BasicHttpRequest(final String method, final String path) {
          super();
          this.method = method;
          if (path != null) {
              try {
                  setUri(new URI(path));
              } catch (final URISyntaxException ex) {
                  this.path = path;
              }
          }
      }
  
      /**
       * Creates request message with the given method, host and request path.
       *
       * @param method request method.
       * @param host request host.
      * @param path request path.
      *
      * @since 5.0
      */
     public BasicHttpRequest(final String method, final HttpHost host, final String path) {
         super();
         this.method = Args.notNull(method, "Method name");
         this.scheme = host != null ? host.getSchemeName() : null;
         this.authority = host != null ? new URIAuthority(host) : null;
         this.path = path;
     }
 
     /**
      * Creates request message with the given method, request URI.
      *
      * @param method request method.
      * @param requestUri request URI.
      *
      * @since 5.0
      */
     public BasicHttpRequest(final String method, final URI requestUri) {
         super();
         this.method = Args.notNull(method, "Method name");
         setUri(Args.notNull(requestUri, "Request URI"));
     }
 
     /**
      * Creates request message with the given method and request path.
      *
      * @param method request method.
      * @param path request path.
      *
      * @since 5.0
      */
     public BasicHttpRequest(final Method method, final String path) {
         super();
         this.method = Args.notNull(method, "Method").name();
         if (path != null) {
             try {
                 setUri(new URI(path));
             } catch (final URISyntaxException ex) {
                 this.path = path;
             }
         }
     }
 
     /**
      * Creates request message with the given method, host and request path.
      *
      * @param method request method.
      * @param host request host.
      * @param path request path.
      *
      * @since 5.0
      */
     public BasicHttpRequest(final Method method, final HttpHost host, final String path) {
         super();
         this.method = Args.notNull(method, "Method").name();
         this.scheme = host != null ? host.getSchemeName() : null;
         this.authority = host != null ? new URIAuthority(host) : null;
         this.path = path;
     }
 
     /**
      * Creates request message with the given method, request URI.
      *
      * @param method request method.
      * @param requestUri request URI.
      *
      * @since 5.0
      */
     public BasicHttpRequest(final Method method, final URI requestUri) {
         super();
         this.method = Args.notNull(method, "Method").name();
         setUri(Args.notNull(requestUri, "Request URI"));
     }
 
     @Override
     public void addHeader(final String name, final Object value) {
         Args.notNull(name, "Header name");
         addHeader(new BasicHeader(name, value));
     }
 
     @Override
     public void setHeader(final String name, final Object value) {
         Args.notNull(name, "Header name");
         setHeader(new BasicHeader(name, value));
     }
 
     @Override
     public void setVersion(final ProtocolVersion version) {
         this.version = version;
     }
 
     @Override
     public ProtocolVersion getVersion() {
         return this.version;
     }
 
     @Override
     public String getMethod() {
         return this.method;
     }
 
     @Override
     public String getPath() {
         return this.path;
     }
 
     @Override
     public void setPath(final String path) {
         this.path = path;
         this.requestUri = null;
     }
 
     @Override
     public String getScheme() {
         return this.scheme;
     }
 
     @Override
     public void setScheme(final String scheme) {
         this.scheme = scheme;
         this.requestUri = null;
     }
 
     @Override
     public URIAuthority getAuthority() {
         return this.authority;
     }
 
     @Override
     public void setAuthority(final URIAuthority authority) {
         this.authority = authority;
         this.requestUri = null;
     }
 
     /**
      * Sets a flag that the {@link #getRequestUri()} method should return the request URI
      * in an absolute form.
      * <p>
      * This flag can used when the request is going to be transmitted via an HTTP/1.1 proxy.
      *
      * @since 5.1
      */
     public void setAbsoluteRequestUri(final boolean absoluteRequestUri) {
         this.absoluteRequestUri = absoluteRequestUri;
     }
 
     @Override
     public String getRequestUri() {
         if (absoluteRequestUri) {
             final StringBuilder buf = new StringBuilder();
             assembleRequestUri(buf);
             return buf.toString();
         } else {
             return getPath();
         }
     }
 
     @Override
     public void setUri(final URI requestUri) {
         this.scheme = requestUri.getScheme();
         if (requestUri.getHost() != null) {
             this.authority = new URIAuthority(
                     requestUri.getRawUserInfo(), requestUri.getHost(), requestUri.getPort());
         } else if (requestUri.getRawAuthority() != null) {
             try {
                 this.authority = URIAuthority.create(requestUri.getRawAuthority());
             } catch (final URISyntaxException ignore) {
                 this.authority = null;
             }
         } else {
             this.authority = null;
         }
         final StringBuilder buf = new StringBuilder();
         final String rawPath = requestUri.getRawPath();
         if (!TextUtils.isBlank(rawPath)) {
             buf.append(rawPath);
         } else {
             buf.append("/");
         }
         final String query = requestUri.getRawQuery();
         if (query != null) {
             buf.append('?').append(query);
         }
         this.path = buf.toString();
         this.requestUri = null;
     }
 
     private void assembleRequestUri(final StringBuilder buf) {
         if (this.authority != null) {
             buf.append(this.scheme != null ? this.scheme : URIScheme.HTTP.id).append("://");
             buf.append(this.authority.getHostName());
             if (this.authority.getPort() >= 0) {
                 buf.append(":").append(this.authority.getPort());
             }
         }
         if (this.path == null) {
             buf.append("/");
         } else {
             if (buf.length() > 0 && !this.path.startsWith("/")) {
                 buf.append("/");
             }
             buf.append(this.path);
         }
     }
 
     @Override
     public URI getUri() throws URISyntaxException {
         if (this.requestUri == null) {
             final StringBuilder buf = new StringBuilder();
             assembleRequestUri(buf);
             this.requestUri = new URI(buf.toString());
         }
         return this.requestUri;
     }
 
     @Override
     public String toString() {
         final StringBuilder buf = new StringBuilder();
         buf.append(method).append(" ");
         assembleRequestUri(buf);
         return buf.toString();
     }
 
 }