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#ifndef MOZC_DICTIONARY_SYSTEM_SYSTEM_DICTIONARY_BUILDER_H_
#define MOZC_DICTIONARY_SYSTEM_SYSTEM_DICTIONARY_BUILDER_H_

#include <map>
#include <string>
#include <vector>

#include "base/base.h"
#include "dictionary/rx/rx_trie_builder.h"
#include "dictionary/rx/rbx_array_builder.h"
#include "dictionary/system/words_info.h"

namespace mozc {
struct Token;
namespace dictionary {
class SystemDictionaryCodecInterface;

class SystemDictionaryBuilder {
 public:
  SystemDictionaryBuilder();
  virtual ~SystemDictionaryBuilder();

  void BuildFromFile(const string &input_file);
  void BuildFromTokens(const vector<Token *> &tokens);

  void WriteToFile(const string &output_file) const;

 private:
  typedef map<string, KeyInfo> KeyInfoMap;

  void ReadTokens(const vector<Token *>& tokens,
                  KeyInfoMap *key_info_map) const;

  void BuildFrequentPos(const KeyInfoMap &key_info_map);
  void WriteFrequentPos(const string &file) const;

  void BuildValueTrie(const KeyInfoMap &key_info_map);
  void WriteValueTrie(const string &file) const;

  void BuildKeyTrie(const KeyInfoMap &key_info_map);
  void WriteKeyTrie(const string &file) const;

  void BuildTokenArray(const KeyInfoMap &key_info_map);
  void WriteTokenArray(const string &file) const;

  void SetIdForValue(KeyInfoMap *key_info_map) const;
  void SetIdForKey(KeyInfoMap *key_info_map) const;
  void SortTokenInfo(KeyInfoMap *key_info_map) const;

  void SetCostType(KeyInfoMap *key_info_map) const;
  void SetPosType(KeyInfoMap *keyinfomap) const;
  void SetValueType(KeyInfoMap *key_info_map) const;

  scoped_ptr<rx::RxTrieBuilder> value_trie_builder_;
  scoped_ptr<rx::RxTrieBuilder> key_trie_builder_;
  scoped_ptr<rx::RbxArrayBuilder> token_array_builder_;

  // mapping from {left_id, right_id} to POS index (0--255)
  map<uint32, int> frequent_pos_;

  const dictionary::SystemDictionaryCodecInterface *codec_;

  DISALLOW_COPY_AND_ASSIGN(SystemDictionaryBuilder);
};
}  // namespace dictionary
}  // namespace mozc

#endif  // MOZC_DICTIONARY_SYSTEM_SYSTEM_DICTIONARY_BUILDER_H_