package com.atlassian.sal.core.search.query;
   
   import java.util.LinkedHashMap;
   import java.util.Map;
   
   import org.apache.commons.lang.StringUtils;
   
   import com.atlassian.sal.api.search.parameter.SearchParameter;
   import com.atlassian.sal.api.search.query.SearchQuery;
  import com.atlassian.sal.core.search.parameter.BasicSearchParameter;
  import com.atlassian.sal.core.util.URIUtil;
  
  /**
   */
  public class DefaultSearchQuery implements SearchQuery
  {
      private StringBuffer searchString = new StringBuffer();
      private Map<String, SearchParameter> parameters = new LinkedHashMap<String, SearchParameter>();
  
      public DefaultSearchQuery(String query)
  	{
          append(query);
  	}
  
      public SearchQuery setParameter(String name, String value)
      {
      	parameters.put(name, new BasicSearchParameter(name, value));
          return this;
      }
  
  	public String getParameter(String name)
  	{
  		final SearchParameter value = parameters.get(name);
  		
  		return value == null ? null : value.getValue();
  	}
  
  	public String buildQueryString()
  	{
  		StringBuilder builder = new StringBuilder(searchString);
  		for (SearchParameter parameter : parameters.values())
  		{
  			builder.append('&');
  			builder.append(parameter.buildQueryString());
  		}
  		return builder.toString();
  	}
  
  	public SearchQuery append(String query)
  	{
          if (StringUtils.isEmpty(query))
          {
              throw new IllegalArgumentException("Cannot parse empty query string!");
          }
          if (query.indexOf(SearchQuery.PARAMETER_SEPARATOR) == -1)
          {
              //looks like there's no params.
              searchString.append(query);
              return this;
          }
          
          final String[] strings = query.split(SearchQuery.PARAMETER_SEPARATOR);
          searchString.append(strings[0]);
          for (int i = 1; i < strings.length; i++)
          {
              String string = strings[i];
              BasicSearchParameter searchParam = new BasicSearchParameter(string);
              parameters.put(searchParam.getName(), searchParam);
          }
  		return this;
  	}
  
      public String getSearchString()
      {
          return URIUtil.decode(searchString.toString());
      }
  
      public int getParameter(String name, int defaultValue)
      {
          try
          {
              return Integer.parseInt(getParameter(name));
          }
          catch (NumberFormatException e)
          {
              // ignore
          }
          return defaultValue;
      }
  
  }