/*
    * 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.
   */
  package org.apache.maven.artifact.repository;
  
  import java.io.File;
  import java.util.Collections;
  import java.util.List;
  import java.util.Objects;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.metadata.ArtifactMetadata;
  import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
  import org.apache.maven.repository.Proxy;
  
  /**
   * Abstraction of an artifact repository. Artifact repositories can be remote, local, or even build reactor or
   * IDE workspace.
   */
  // TODO completely separate local and remote artifact repositories
  public class MavenArtifactRepository implements ArtifactRepository {
      private String id;
  
      private String url;
  
      private String basedir;
  
      private String protocol;
  
      private ArtifactRepositoryLayout layout;
  
      private ArtifactRepositoryPolicy snapshots;
  
      private ArtifactRepositoryPolicy releases;
  
      private Authentication authentication;
  
      private Proxy proxy;
  
      private List<ArtifactRepository> mirroredRepositories = Collections.emptyList();
  
      private boolean blocked;
  
      public MavenArtifactRepository() {}
  
      /**
       * Create a remote download repository.
       *
       * @param id        the unique identifier of the repository
       * @param url       the URL of the repository
       * @param layout    the layout of the repository
       * @param snapshots the policies to use for snapshots
       * @param releases  the policies to use for releases
       */
      public MavenArtifactRepository(
              String id,
              String url,
              ArtifactRepositoryLayout layout,
              ArtifactRepositoryPolicy snapshots,
              ArtifactRepositoryPolicy releases) {
          this.id = id;
          this.url = url;
          this.layout = layout;
          this.snapshots = snapshots;
          this.releases = releases;
          //
          // Derive these from the URL
          //
          this.protocol = protocol(url);
          this.basedir = basedir(url);
      }
  
      public String pathOf(Artifact artifact) {
          return layout.pathOf(artifact);
      }
  
      public String pathOfRemoteRepositoryMetadata(ArtifactMetadata artifactMetadata) {
          return layout.pathOfRemoteRepositoryMetadata(artifactMetadata);
      }
  
      public String pathOfLocalRepositoryMetadata(ArtifactMetadata metadata, ArtifactRepository repository) {
          return layout.pathOfLocalRepositoryMetadata(metadata, repository);
      }
  
     public void setLayout(ArtifactRepositoryLayout layout) {
         this.layout = layout;
     }
 
     public ArtifactRepositoryLayout getLayout() {
         return layout;
     }
 
     public void setSnapshotUpdatePolicy(ArtifactRepositoryPolicy snapshots) {
         this.snapshots = snapshots;
     }
 
     public ArtifactRepositoryPolicy getSnapshots() {
         return snapshots;
     }
 
     public void setReleaseUpdatePolicy(ArtifactRepositoryPolicy releases) {
         this.releases = releases;
     }
 
     public ArtifactRepositoryPolicy getReleases() {
         return releases;
     }
 
     public String getKey() {
         return getId();
     }
 
     public String toString() {
         StringBuilder sb = new StringBuilder(256);
 
         sb.append("      id: ").append(getId()).append('\n');
         sb.append("      url: ").append(getUrl()).append('\n');
         sb.append("   layout: ").append(layout != null ? layout : "none").append('\n');
 
         if (proxy != null) {
             sb.append("    proxy: ")
                     .append(proxy.getHost())
                     .append(':')
                     .append(proxy.getPort())
                     .append('\n');
         }
 
         if (snapshots != null) {
             sb.append("snapshots: [enabled => ").append(snapshots.isEnabled());
             sb.append(", update => ").append(snapshots.getUpdatePolicy()).append("]\n");
         }
 
         if (releases != null) {
             sb.append(" releases: [enabled => ").append(releases.isEnabled());
             sb.append(", update => ").append(releases.getUpdatePolicy()).append("]\n");
         }
 
         sb.append("   blocked: ").append(isBlocked()).append('\n');
 
         return sb.toString();
     }
 
     public Artifact find(Artifact artifact) {
         File artifactFile = new File(getBasedir(), pathOf(artifact));
 
         // We need to set the file here or the resolver will fail with an NPE, not fully equipped to deal
         // with multiple local repository implementations yet.
         artifact.setFile(artifactFile);
 
         return artifact;
     }
 
     public List<String> findVersions(Artifact artifact) {
         return Collections.emptyList();
     }
 
     public String getId() {
         return id;
     }
 
     public String getUrl() {
         return url;
     }
 
     public String getBasedir() {
         return basedir;
     }
 
     public String getProtocol() {
         return protocol;
     }
 
     public void setId(String id) {
         this.id = id;
     }
 
     public void setUrl(String url) {
         this.url = url;
 
         this.protocol = protocol(url);
         this.basedir = basedir(url);
     }
 
     // Path Utils
 
     /**
      * Return the protocol name.
      * <br>
      * E.g: for input
      * <code>http://www.codehaus.org</code> this method will return <code>http</code>
      *
      * @param url the url
      * @return the host name
      */
     private static String protocol(final String url) {
         final int pos = url.indexOf(':');
 
         if (pos == -1) {
             return "";
         }
         return url.substring(0, pos).trim();
     }
 
     /**
      * Derive the path portion of the given URL.
      *
      * @param url the repository URL
      * @return the basedir of the repository
      * TODO need to URL decode for spaces?
      */
     private String basedir(String url) {
         String retValue = null;
 
         if (protocol.equalsIgnoreCase("file")) {
             retValue = url.substring(protocol.length() + 1);
             retValue = decode(retValue);
             // special case: if omitted // on protocol, keep path as is
             if (retValue.startsWith("//")) {
                 retValue = retValue.substring(2);
 
                 if (retValue.length() >= 2 && (retValue.charAt(1) == '|' || retValue.charAt(1) == ':')) {
                     // special case: if there is a windows drive letter, then keep the original return value
                     retValue = retValue.charAt(0) + ":" + retValue.substring(2);
                 } else {
                     // Now we expect the host
                     int index = retValue.indexOf('/');
                     if (index >= 0) {
                         retValue = retValue.substring(index + 1);
                     }
 
                     // special case: if there is a windows drive letter, then keep the original return value
                     if (retValue.length() >= 2 && (retValue.charAt(1) == '|' || retValue.charAt(1) == ':')) {
                         retValue = retValue.charAt(0) + ":" + retValue.substring(2);
                     } else if (index >= 0) {
                         // leading / was previously stripped
                         retValue = "/" + retValue;
                     }
                 }
             }
 
             // special case: if there is a windows drive letter using |, switch to :
             if (retValue.length() >= 2 && retValue.charAt(1) == '|') {
                 retValue = retValue.charAt(0) + ":" + retValue.substring(2);
             }
 
             // normalize separators
             retValue = new File(retValue).getPath();
         }
 
         if (retValue == null) {
             retValue = "/";
         }
         return retValue.trim();
     }
 
     /**
      * Decodes the specified (portion of a) URL. <strong>Note:</strong> This decoder assumes that ISO-8859-1 is used to
      * convert URL-encoded bytes to characters.
      *
      * @param url The URL to decode, may be <code>null</code>.
      * @return The decoded URL or <code>null</code> if the input was <code>null</code>.
      */
     private static String decode(String url) {
         String decoded = url;
         if (url != null) {
             int pos = -1;
             while ((pos = decoded.indexOf('%', pos + 1)) >= 0) {
                 if (pos + 2 < decoded.length()) {
                     String hexStr = decoded.substring(pos + 1, pos + 3);
                     char ch = (char) Integer.parseInt(hexStr, 16);
                     decoded = decoded.substring(0, pos) + ch + decoded.substring(pos + 3);
                 }
             }
         }
         return decoded;
     }
 
     public int hashCode() {
         final int prime = 31;
         int result = 1;
         result = prime * result + ((getId() == null) ? 0 : getId().hashCode());
         return result;
     }
 
     public boolean equals(Object obj) {
         if (this == obj) {
             return true;
         }
         if (obj == null) {
             return false;
         }
         if (getClass() != obj.getClass()) {
             return false;
         }
 
         ArtifactRepository other = (ArtifactRepository) obj;
 
         return eq(getId(), other.getId());
     }
 
     protected static <T> boolean eq(T s1, T s2) {
         return Objects.equals(s1, s2);
     }
 
     public Authentication getAuthentication() {
         return authentication;
     }
 
     public void setAuthentication(Authentication authentication) {
         this.authentication = authentication;
     }
 
     public Proxy getProxy() {
         return proxy;
     }
 
     public void setProxy(Proxy proxy) {
         this.proxy = proxy;
     }
 
     public boolean isBlacklisted() {
         return false;
     }
 
     public void setBlacklisted(boolean blackListed) {
         // no op
     }
 
     public boolean isUniqueVersion() {
         return true;
     }
 
     public boolean isProjectAware() {
         return false;
     }
 
     public List<ArtifactRepository> getMirroredRepositories() {
         return mirroredRepositories;
     }
 
     public void setMirroredRepositories(List<ArtifactRepository> mirroredRepositories) {
         if (mirroredRepositories != null) {
             this.mirroredRepositories = Collections.unmodifiableList(mirroredRepositories);
         } else {
             this.mirroredRepositories = Collections.emptyList();
         }
     }
 
     public boolean isBlocked() {
         return blocked;
     }
 
     public void setBlocked(boolean blocked) {
         this.blocked = blocked;
     }
 }