#ifndef ARABICA_XSLT_APPLY_TEMPLATES_HANDLER_HPP
#define ARABICA_XSLT_APPLY_TEMPLATES_HANDLER_HPP

#include "../xslt_apply_templates.hpp"
#include "xslt_sort_handler.hpp"
#include "xslt_with_param_handler.hpp"

namespace Arabica
{
namespace XSLT
{

template<class string_type, class string_adaptor>
class ApplyTemplatesHandler : public SAX::DefaultHandler<string_type, string_adaptor>
{
public:
  ApplyTemplatesHandler(CompilationContext<string_type, string_adaptor>& context) :
    context_(context),
    applyTemplates_(0)
  {
  } // ApplyTemplatesHandler

  virtual void startElement(const string_type& namespaceURI,
                            const string_type& localName,
                            const string_type& qName,
                            const SAX::Attributes<string_type, string_adaptor>& atts)
  {
    if(applyTemplates_ == 0)
    {
      static const ValueRule rules[] = { { "select", false, 0, 0 },
                                         { "mode", false, 0, 0 },
                                         { 0, false, 0, 0} };
      std::map<string_type, string_type> attrs = gatherAttributes(qName, atts, rules);
    
      const string_type& select = attrs["select"];
      Arabica::XPath::XPathExpressionPtr<string_type, string_adaptor> xpath;
      if(select != "")
        xpath = context_.xpath_expression(select);

      string_type mode;
      if(attrs["mode"] != "")
        mode = context_.processInternalQName(attrs["mode"]).clarkName();
      applyTemplates_ = new ApplyTemplates<string_type, string_adaptor>(xpath, mode);

      return;
    } // if(applyTemplates_ == 0)

    if(namespaceURI == StylesheetConstant::NamespaceURI())
    {
      if(localName == "sort")
      {

        context_.push(0,
                      new SortHandler(context_, *applyTemplates_),
                      namespaceURI, 
                      localName, 
                      qName, 
                      atts);
        return;
      } // if(localName == "sort")

      if(localName == "with-param")
      {
        context_.push(0,
                      new WithParamHandler(context_, *applyTemplates_),
                      namespaceURI, 
                      localName, 
                      qName, 
                      atts);
        return;
      } // if(localName == "sort")
    } // if ...
  
    throw SAX::SAXException("xsl:apply-templates can only contain xsl:sort and xsl:with-param elements.");
  } // startElement

  virtual void endElement(const string_type& /* namespaceURI */,
                          const string_type& /* localName */,
                          const string_type& /* qName */)
  {
    context_.parentContainer().add_item(applyTemplates_);
    context_.pop();
  } // endElement

  virtual void characters(const string_type& ch)
  {
    verifyNoCharacterData(ch, "xsl:apply-templates");
  } // characters

private:
  CompilationContext<string_type, string_adaptor>& context_;
  ApplyTemplates<string_type, string_adaptor>* applyTemplates_;
}; // class ApplyTemplatesHandler

} // namespace XSLT
} // namespace Arabica

#endif // ARABICA_XSLT_APPLY_TEMPLATES_HANDLER_HPP