/*
    * 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.logging.log4j.core.config.builder.impl;
  
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.core.Filter;
  import org.apache.logging.log4j.core.config.Configuration;
  import org.apache.logging.log4j.core.config.ConfigurationException;
  import org.apache.logging.log4j.core.config.ConfigurationSource;
  import org.apache.logging.log4j.core.config.builder.api.AppenderComponentBuilder;
  import org.apache.logging.log4j.core.config.builder.api.AppenderRefComponentBuilder;
  import org.apache.logging.log4j.core.config.builder.api.Component;
  import org.apache.logging.log4j.core.config.builder.api.ComponentBuilder;
  import org.apache.logging.log4j.core.config.builder.api.ConfigurationBuilder;
  import org.apache.logging.log4j.core.config.builder.api.CustomLevelComponentBuilder;
  import org.apache.logging.log4j.core.config.builder.api.FilterComponentBuilder;
  import org.apache.logging.log4j.core.config.builder.api.LayoutComponentBuilder;
  import org.apache.logging.log4j.core.config.builder.api.LoggerComponentBuilder;
  import org.apache.logging.log4j.core.config.builder.api.RootLoggerComponentBuilder;
  
  import java.lang.reflect.Constructor;
  import java.util.List;
  
  /**
   * @param <T> The BuiltConfiguration type.
   *
   */
  public class DefaultConfigurationBuilder<T extends BuiltConfiguration> implements ConfigurationBuilder<T> {
  
      private final Component root = new Component();
      private Component loggers;
      private Component appenders;
      private Component filters;
      private Component properties;
      private Component customLevels;
      private final Class<T> clazz;
      private ConfigurationSource source;
      private int monitorInterval = 0;
      private Level level = null;
      private String verbosity = null;
      private String packages = null;
      private String shutdownFlag = null;
      private String advertiser = null;
  
      private String name = null;
  
      public DefaultConfigurationBuilder() {
          this((Class<T>) BuiltConfiguration.class);
          root.addAttribute("name", "Built");
      }
  
      public DefaultConfigurationBuilder(final Class<T> clazz) {
          if (clazz == null) {
              throw new IllegalArgumentException("A Configuration class must be provided");
          }
          this.clazz = clazz;
          final List<Component> components = root.getComponents();
          properties = new Component("Properties");
          components.add(properties);
          customLevels = new Component("CustomLevels");
          components.add(customLevels);
          filters = new Component("Filters");
          components.add(filters);
          appenders = new Component("Appenders");
          components.add(appenders);
          loggers = new Component("Loggers");
          components.add(loggers);
      }
      
      protected ConfigurationBuilder<T> add(final Component parent, final ComponentBuilder<?> builder) {
          parent.getComponents().add(builder.build());
          return this;
      }
  
      @Override
      public ConfigurationBuilder<T> add(final AppenderComponentBuilder builder) {
          return add(appenders, builder);
      }
  
      @Override
      public ConfigurationBuilder<T> add(final CustomLevelComponentBuilder builder) {
          return add(customLevels, builder);
      }
  
      @Override
     public ConfigurationBuilder<T> add(final FilterComponentBuilder builder) {
         return add(filters, builder);
     }
 
     @Override
     public ConfigurationBuilder<T> add(final LoggerComponentBuilder builder) {
         return add(loggers, builder);
     }
 
     @Override
     public ConfigurationBuilder<T> add(final RootLoggerComponentBuilder builder) {
         for (final Component c : loggers.getComponents()) {
             if (c.getPluginType().equals("root")) {
                 throw new ConfigurationException("Root Logger was previously defined");
             }
         }
         return add(loggers, builder);
     }
 
     @Override
     public ConfigurationBuilder<T> addProperty(final String key, final String value) {
         properties.addComponent(newComponent(key, "Property", value).build());
         return this;
     }
 
     @Override
     public T build() {
         T configuration;
         try {
             if (source == null) {
                 source = ConfigurationSource.NULL_SOURCE;
             }
             final Constructor<T> constructor = clazz.getConstructor(ConfigurationSource.class, Component.class);
             configuration = constructor.newInstance(source, root);
             configuration.setMonitorInterval(monitorInterval);
             if (name != null) {
                 configuration.setName(name);
             }
             if (level != null) {
                 configuration.getStatusConfiguration().withStatus(level);
             }
             if (verbosity != null) {
                 configuration.getStatusConfiguration().withVerbosity(verbosity);
             }
             if (packages != null) {
                 configuration.setPluginPackages(packages);
             }
             if (shutdownFlag != null) {
                 configuration.setShutdownHook(shutdownFlag);
             }
             if (advertiser != null) {
                 configuration.createAdvertiser(advertiser, source);
             }
         } catch (final Exception ex) {
             throw new IllegalArgumentException("Invalid Configuration class specified", ex);
         }
         configuration.getStatusConfiguration().initialize();
         configuration.initialize();
         return configuration;
     }
 
     @Override
     public AppenderComponentBuilder newAppender(final String name, final String type) {
         return new DefaultAppenderComponentBuilder(this, name, type);
     }
 
     @Override
     public AppenderRefComponentBuilder newAppenderRef(final String ref) {
         return new DefaultAppenderRefComponentBuilder(this, ref);
     }
 
     @Override
     public LoggerComponentBuilder newAsyncLogger(final String name, final Level level) {
         return new DefaultLoggerComponentBuilder(this, name, level.toString(), "AsyncLogger");
     }
 
     @Override
     public LoggerComponentBuilder newAsyncLogger(final String name, final String level) {
         return new DefaultLoggerComponentBuilder(this, name, level, "AsyncLogger");
     }
 
     @Override
     public RootLoggerComponentBuilder newAsyncRootLogger(final Level level) {
         return new DefaultRootLoggerComponentBuilder(this, level.toString(), "AsyncRoot");
     }
 
     @Override
     public RootLoggerComponentBuilder newAsyncRootLogger(final String level) {
         return new DefaultRootLoggerComponentBuilder(this, level, "AsyncRoot");
     }
 
     @Override
     public <B extends ComponentBuilder<B>> ComponentBuilder<B> newComponent(final String name, final String type) {
         return new DefaultComponentBuilder<>(this, name, type);
     }
 
     @Override
     public <B extends ComponentBuilder<B>> ComponentBuilder<B> newComponent(final String name, final String type, final String value) {
         return new DefaultComponentBuilder<>(this, name, type, value);
     }
 
 
     @Override
     public CustomLevelComponentBuilder newCustomLevel(final String name, final int level) {
         return new DefaultCustomLevelComponentBuilder(this, name, level);
     }
 
     @Override
     public FilterComponentBuilder newFilter(final String type, final Filter.Result onMatch, final Filter.Result onMisMatch) {
         return new DefaultFilterComponentBuilder(this, type, onMatch.name(), onMisMatch.name());
     }
 
     @Override
     public FilterComponentBuilder newFilter(final String type, final String onMatch, final String onMisMatch) {
         return new DefaultFilterComponentBuilder(this, type, onMatch, onMisMatch);
     }
 
     @Override
     public LayoutComponentBuilder newLayout(final String type) {
         return new DefaultLayoutComponentBuilder(this, type);
     }
 
 
     @Override
     public LoggerComponentBuilder newLogger(final String name, final Level level) {
         return new DefaultLoggerComponentBuilder(this, name, level.toString());
     }
 
     @Override
     public LoggerComponentBuilder newLogger(final String name, final String level) {
         return new DefaultLoggerComponentBuilder(this, name, level);
     }
 
     @Override
     public RootLoggerComponentBuilder newRootLogger(final Level level) {
         return new DefaultRootLoggerComponentBuilder(this, level.toString());
     }
 
     @Override
     public RootLoggerComponentBuilder newRootLogger(final String level) {
         return new DefaultRootLoggerComponentBuilder(this, level);
     }
 
     @Override
     public ConfigurationBuilder<T> setAdvertiser(final String advertiser) {
         this.advertiser = advertiser;
         return this;
     }
 
     /**
      * Set the name of the configuration.
      *
      * @param name the name of the {@link Configuration}. By default is {@code "Assembled"}.
      * @return this builder instance
      */
     @Override
     public ConfigurationBuilder<T> setConfigurationName(final String name) {
         this.name = name;
         return this;
     }
 
     /**
      * Set the ConfigurationSource.
      *
      * @param configurationSource the {@link ConfigurationSource}
      * @return this builder instance
      */
     @Override
     public ConfigurationBuilder<T> setConfigurationSource(final ConfigurationSource configurationSource) {
         source = configurationSource;
         return this;
     }
 
     @Override
     public ConfigurationBuilder<T> setMonitorInterval(final String intervalSeconds) {
         monitorInterval = Integer.parseInt(intervalSeconds);
         return this;
     }
 
     @Override
     public ConfigurationBuilder<T> setPackages(final String packages) {
         this.packages = packages;
         return this;
     }
 
     @Override
     public ConfigurationBuilder<T> setShutdownHook(final String flag) {
         this.shutdownFlag = flag;
         return this;
     }
 
     @Override
     public ConfigurationBuilder<T> setStatusLevel(final Level level) {
         this.level = level;
         return this;
     }
 
     @Override
     public ConfigurationBuilder<T> setVerbosity(final String verbosity) {
         this.verbosity = verbosity;
         return this;
     }
 }