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#include "base/version.h"

#include "base/logging.h"
#include "base/number_util.h"
#include "base/util.h"

// Import the generated version_def.h.
#include "base/version_def.h"

namespace mozc {

namespace {
bool StringAsIntegerComparator(const std::string &lhs, const std::string &rhs) {
  return NumberUtil::SimpleAtoi(lhs) < NumberUtil::SimpleAtoi(rhs);
}
}  // namespace

std::string Version::GetMozcVersion() { return version::kMozcVersion; }

#ifdef OS_WIN
std::wstring Version::GetMozcVersionW() {
  std::wstring version;
  Util::UTF8ToWide(version::kMozcVersion, &version);
  return version;
}
#endif

int Version::GetMozcVersionMajor() { return version::kMozcVersionMajor; }

int Version::GetMozcVersionMinor() { return version::kMozcVersionMinor; }

int Version::GetMozcVersionBuildNumber() {
  return version::kMozcVersionBuildNumber;
}

int Version::GetMozcVersionRevision() { return version::kMozcVersionRevision; }

const char *Version::GetMozcEngineVersion() {
  return version::kMozcEngineVersion;
}

bool Version::CompareVersion(const std::string &lhs, const std::string &rhs) {
  if (lhs == rhs) {
    return false;
  }
  if (lhs.find("Unknown") != std::string::npos ||
      rhs.find("Unknown") != std::string::npos) {
    LOG(WARNING) << "Unknown is given as version";
    return false;
  }
  std::vector<std::string> vlhs;
  Util::SplitStringUsing(lhs, ".", &vlhs);
  std::vector<std::string> vrhs;
  Util::SplitStringUsing(rhs, ".", &vrhs);
  return std::lexicographical_compare(vlhs.begin(), vlhs.end(), vrhs.begin(),
                                      vrhs.end(), StringAsIntegerComparator);
}

}  // namespace mozc