/*
    * 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.jline;
  
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  import org.apache.maven.api.Constants;
  import org.apache.maven.api.annotations.Experimental;
  import org.apache.maven.api.di.Named;
  import org.apache.maven.api.di.Priority;
  import org.apache.maven.api.di.Singleton;
  import org.apache.maven.api.services.MessageBuilder;
  import org.apache.maven.api.services.MessageBuilderFactory;
  import org.jline.utils.AttributedStringBuilder;
  import org.jline.utils.AttributedStyle;
  import org.jline.utils.StyleResolver;
  
  @Experimental
  @Named
  @Singleton
  @Priority(10)
  public class JLineMessageBuilderFactory implements MessageBuilderFactory {
      private final StyleResolver resolver;
  
      public JLineMessageBuilderFactory() {
          this.resolver = new MavenStyleResolver();
      }
  
      @Override
      public boolean isColorEnabled() {
          return MessageUtils.isColorEnabled();
      }
  
      @Override
      public int getTerminalWidth() {
          return MessageUtils.getTerminalWidth();
      }
  
      @Override
      public MessageBuilder builder() {
          return builder(64);
      }
  
      @Override
      public MessageBuilder builder(int size) {
          return new JlineMessageBuilder(resolver, size);
      }
  
      private static class JlineMessageBuilder implements MessageBuilder {
          private final StyleResolver styleResolver;
          private final AttributedStringBuilder builder;
  
          private JlineMessageBuilder(StyleResolver styleResolver, int size) {
              this.styleResolver = styleResolver;
              this.builder = new AttributedStringBuilder(size);
          }
  
          @Override
          public MessageBuilder style(String style) {
              if (MessageUtils.isColorEnabled()) {
                  builder.style(styleResolver.resolve(style));
              }
              return this;
          }
  
          @Override
          public MessageBuilder resetStyle() {
              builder.style(AttributedStyle.DEFAULT);
              return this;
          }
  
          @Override
          public MessageBuilder append(CharSequence cs) {
              builder.append(cs);
              return this;
          }
  
          @Override
          public MessageBuilder append(CharSequence cs, int start, int end) {
              builder.append(cs, start, end);
              return this;
          }
 
         @Override
         public MessageBuilder append(char c) {
             builder.append(c);
             return this;
         }
 
         @Override
         public MessageBuilder setLength(int length) {
             builder.setLength(length);
             return this;
         }
 
         @Override
         public String build() {
             return builder.toAnsi(MessageUtils.terminal);
         }
 
         @Override
         public String toString() {
             return build();
         }
     }
 
     private static class MavenStyleResolver extends StyleResolver {
         private final Map<String, AttributedStyle> styles = new ConcurrentHashMap<>();
 
         private MavenStyleResolver() {
             super(key -> {
                 String v = System.getProperty(Constants.MAVEN_STYLE_PREFIX + key);
                 if (v == null) {
                     v = System.getProperty("style." + key);
                 }
                 return v;
             });
         }
 
         @Override
         public AttributedStyle resolve(String spec) {
             return styles.computeIfAbsent(spec, this::doResolve);
         }
 
         @Override
         public AttributedStyle resolve(String spec, String defaultSpec) {
             return resolve(defaultSpec != null ? spec + ":-" + defaultSpec : spec);
         }
 
         private AttributedStyle doResolve(String spec) {
             String def = null;
             int i = spec.indexOf(":-");
             if (i != -1) {
                 String[] parts = spec.split(":-");
                 spec = parts[0].trim();
                 def = parts[1].trim();
             }
             return super.resolve(spec, def);
         }
     }
 }