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#include "prediction/suggestion_filter.h"

#include <string>
#include <utility>

#include "base/hash.h"
#include "base/logging.h"
#include "base/status.h"
#include "base/util.h"
#include "storage/existence_filter.h"
#include "absl/strings/string_view.h"
#include "absl/types/span.h"

namespace mozc {

using ::mozc::storage::ExistenceFilter;

absl::StatusOr<SuggestionFilter> SuggestionFilter::Create(
    const absl::Span<const uint32_t> data) {
  absl::StatusOr<ExistenceFilter> filter = ExistenceFilter::Read(data);
  if (!filter.ok()) {
    LOG(ERROR) << "SuggestionFilterData is broken: " << filter.status();
    return filter.status();
  }
  return SuggestionFilter(*std::move(filter));
}

SuggestionFilter SuggestionFilter::CreateOrDie(
    const absl::Span<const uint32_t> data) {
  absl::StatusOr<SuggestionFilter> filter = Create(data);
  CHECK_OK(filter);
  return *std::move(filter);
}

bool SuggestionFilter::IsBadSuggestion(const absl::string_view text) const {
  std::string lower_text(text);
  Util::LowerString(&lower_text);
  return filter_.Exists(Hash::Fingerprint(lower_text));
}

}  // namespace mozc
