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#ifndef MOZC_REWRITER_SYMBOL_REWRITER_H_
#define MOZC_REWRITER_SYMBOL_REWRITER_H_

#include <string>
#include "rewriter/embedded_dictionary.h"
#include "rewriter/rewriter_interface.h"
// for FRIEND_TEST()
#include "testing/base/public/gunit_prod.h"

namespace mozc {

class Segment;
class Segments;

class SymbolRewriter: public RewriterInterface  {
 public:
  SymbolRewriter();
  virtual ~SymbolRewriter();
  virtual bool Rewrite(Segments *segments) const;

private:
  FRIEND_TEST(SymbolRewriterTest, TriggerRewriteEntireTest);
  FRIEND_TEST(SymbolRewriterTest, TriggerRewriteEachTest);
  FRIEND_TEST(SymbolRewriterTest, SplitDescriptionTest);

  // Some characters may have different description for full/half width forms.
  // Here we just change the description in this function.
  static const string GetDescription(const string &value,
                                     const char *description,
                                     const char *additional_description);

  // return true key has no-hiragana
  static bool IsSymbol(const string &key);

  // Insert alternative form of space.
  static void ExpandSpace(Segment *segment);

  // Returns true if the symbol is platform dependent
  static bool IsPlatformDependent(const EmbeddedDictionary::Value &value);

  // Return true if two symbols are in same group.
  static bool InSameSymbolGroup(const EmbeddedDictionary::Value &lhs,
                                const EmbeddedDictionary::Value &rhs);

  // Insert Symbol into segment.
  static void InsertCandidates(const EmbeddedDictionary::Value *value,
                               size_t size,
                               bool context_sensitive,
                               Segment *segment);

  // Insert symbols using connected all segments.
  static bool RewriteEntireCandidate(Segments *segments);

  // Insert symbols using single segment.
  static bool RewriteEachCandidate(Segments *segments);
};
}  // namespace mozc

#endif  // MOZC_REWRITER_SYMBOL_REWRITER_H_