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#ifndef MOZC_STORAGE_LOUDS_LOUDS_TRIE_BUILDER_H_
#define MOZC_STORAGE_LOUDS_LOUDS_TRIE_BUILDER_H_

#include <string>
#include <vector>

namespace mozc {
namespace storage {
namespace louds {

class LoudsTrieBuilder {
 public:
  LoudsTrieBuilder() = default;

  LoudsTrieBuilder(const LoudsTrieBuilder &) = delete;
  LoudsTrieBuilder &operator=(const LoudsTrieBuilder &) = delete;

  LoudsTrieBuilder(LoudsTrieBuilder &&) = default;
  LoudsTrieBuilder &operator=(LoudsTrieBuilder &&) = default;

  ~LoudsTrieBuilder() = default;

  // Adds the word to the builder. It is necessary to call this method,
  // before Build invocation.
  void Add(const std::string &word);

  // Builds the trie image.
  void Build();

  // Returns the binary image of the trie.
  const std::string &image() const;

  // Returns the key_id for the word (-1 if not found).
  // Note: in Mozc, the key_id will be used to build additional data
  // related to the built LoudsTrie.
  int GetId(const std::string &word) const;

 private:
  bool built_ = false;

  std::vector<std::string> word_list_;
  std::vector<int> id_list_;
  std::string image_;
};

}  // namespace louds
}  // namespace storage
}  // namespace mozc

#endif  // MOZC_STORAGE_LOUDS_LOUDS_TRIE_BUILDER_H_
