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#include "dictionary/file/dictionary_file_builder.h"

#include <string>
#include "base/base.h"
#include "base/file_stream.h"
#include "dictionary/file/codec_interface.h"
#include "dictionary/file/codec.h"
#include "dictionary/file/section.h"

namespace mozc {

DictionaryFileBuilder::DictionaryFileBuilder() {}

DictionaryFileBuilder::~DictionaryFileBuilder() {
  for (vector<DictionaryFileSection>::iterator itr = sections_.begin();
       itr != sections_.end(); itr++) {
    delete [] itr->ptr;
  }
}

bool DictionaryFileBuilder::AddSectionFromFile(
    const string &section_name, const string &file_name) {
  if (added_.find(section_name) != added_.end()) {
    DLOG(INFO) << "Already added: " << section_name;
    return false;
  }
  added_.insert(section_name);

  InputFileStream ifs(file_name.c_str(), ios::binary);
  CHECK(ifs) << "Failed to read" << file_name;

  ifs.seekg(0, ios::end);
  const int len = ifs.tellg();

  // reads the file
  ifs.seekg(0, ios::beg);
  char *ptr = new char[len];
  ifs.read(ptr, len);

  sections_.resize(sections_.size() + 1);
  sections_.back().ptr = ptr;
  sections_.back().len = len;

  const string name =
      DictionaryFileCodecFactory::GetCodec()->GetSectionName(section_name);
  sections_.back().name = name;

  return true;
}

void DictionaryFileBuilder::WriteImageToFile(const string &file_name) const {
  LOG(INFO) << "Start writing dictionary file to " << file_name;
  OutputFileStream ofs(file_name.c_str(), ios::binary);
  DictionaryFileCodecFactory::GetCodec()->WriteSections(sections_, &ofs);
  LOG(INFO) << "Generated";
}
}  // namespace