package cz.cuni.amis.pogamut.ut2004.bot.impl;
   
   import java.util.ArrayList;
   import java.util.Collections;
   import java.util.HashMap;
   import java.util.List;
   import java.util.Map;
   
   import cz.cuni.amis.pogamut.ut2004.communication.messages.gbcommands.Configuration;
  import cz.cuni.amis.utils.SafeEquals;
  
  /**
   * Provides abstraction over the {@link UT2004Bot} name in the game allowing to append "extra infos" to it.
   * @author Jimmy
   */
  public class UT2004BotName {
  
  	private UT2004Bot bot;
  	
  	private String base;
  
  	private Map<String, String> infos = new HashMap<String, String>();
  	
  	private String nullKeyValue = null;
  	
  	public UT2004BotName(UT2004Bot bot, String base) {
  		this.bot = bot;
  		this.base = base;
  	}
  	
  	public void setNameBase(String base) {
  		this.base = base;
  		updateName();
  	}
  	
  	/**
  	 * Assings 'null' key.
  	 * @param tag
  	 */
  	public void setTag(String tag) {
  		if (tag == null) deleteTag();
  		else setInfo(null, tag);
  	}
  	
  	/**
  	 * Removes 'null' key.
  	 */
  	public void deleteTag() {
  		deleteInfo(null);
  	}
  	
  	/**
  	 * Alias for {@link #setInfo(String, String)}(null, value), i.e., assigning 'value' to 'NULL KEY'.
  	 * @param value
  	 */
  	public void setInfo(String value) {
  		setInfo(null, value);
  	}
  	
  	/**
  	 * @param key CAN BE NULL 
  	 * @param value CAN BE NULL (null == delete the key)
  	 */
  	public void setInfo(String key, String value) {
  		if (value == null) {
  			deleteInfo(key);
  			return;
  		}
  		if (key == null) {
  			if (SafeEquals.equals(value, nullKeyValue)) return;
  			nullKeyValue = value;
  		} else {
  			String oldValue = infos.get(key);
  			if (SafeEquals.equals(oldValue, value)) return;
  			infos.put(key, value);
  		}
  		updateName();
  	}
  	
  	/**
  	 * @param key CAN BE NULL
  	 */
  	public void deleteInfo(String key) {
  		if (key == null) {
  			if (nullKeyValue == null) return;
  			nullKeyValue = null;
  			updateName();
  		} else {
  			if (infos.remove(key) != null) {
  				updateName();
  			}
  		}
  	}
  	
  	public void updateName() {
  		List<String> keys = new ArrayList<String>(infos.keySet());
  		Collections.sort(keys);
  		StringBuffer name = new StringBuffer();
  		name.append(base);
 		if (nullKeyValue != null) { 
 			name.append(" [");
 			name.append(nullKeyValue);			
 			name.append("]");
 		}
 		for (String key : keys) {
 			String value = infos.get(key);
 			name.append(" [");
 			name.append(key);
 			if (value != null) {
 				name.append(": ");
 				name.append(value);
 			}
 			name.append("]");
 		}
 		bot.getAct().act(new Configuration().setName(name.toString()));
 	}
 	
 }