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// Converts collocation text file into existence filter header file.
// input format:
// <collocation1>
// <collocation2>
// ...
//
// example:
// ./gen_collocation_data_main.cc --collocation_data=collocation.txt
// > embedded_collocation_data.h

#include <iostream>
#include <vector>

#include "base/file_stream.h"
#include "rewriter/gen_existence_header.h"

DEFINE_string(collocation_data, "", "collocation data text");
DEFINE_string(output, "", "output file name (default: stdout)");
DEFINE_double(error_rate, 0.00001, "error rate");
DECLARE_bool(logtostderr);

namespace mozc {
namespace {

void Convert() {
  InputFileStream ifs(FLAGS_collocation_data.c_str());
  string line;
  vector<string> entries;
  while (getline(ifs, line)) {
    if (line.empty()) {
      continue;
    }
    entries.push_back(line);
  }

  ostream *ofs = &cout;
  if (!FLAGS_output.empty()) {
    ofs = new OutputFileStream(FLAGS_output.c_str());
  }

  const string kNameSpace = "CollocationData";

  GenExistenceHeader::GenExistenceHeader(entries, kNameSpace, ofs,
                                               FLAGS_error_rate);

  if (ofs != &cout) {
    delete ofs;
  }
}
}  // namespace
}  // namespace mozc

int main(int argc, char *argv[]) {
  FLAGS_logtostderr = true;
  InitGoogle(argv[0], &argc, &argv, true);

  if (FLAGS_collocation_data.empty() && argc > 1) {
    FLAGS_collocation_data = argv[1];
  }

  LOG(INFO) << FLAGS_collocation_data;

  mozc::Convert();

  return 0;
}