/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/glean/bindings/Denominator.h"

#include "nsString.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/ResultVariant.h"
#include "mozilla/dom/GleanMetricsBinding.h"
#include "mozilla/glean/bindings/ScalarGIFFTMap.h"
#include "mozilla/glean/fog_ffi_generated.h"
#include "GIFFTFwd.h"

namespace mozilla::glean {

namespace impl {

void DenominatorStandalone::Add(int32_t aAmount) const {
  auto scalarId = ScalarIdForMetric(mId);
  if (scalarId && aAmount >= 0) {
    TelemetryScalar::Add(scalarId.extract(), aAmount);
  }
  fog_denominator_add(mId, aAmount);
}

Result<Maybe<int32_t>, nsCString> DenominatorMetric::TestGetValue(
    const nsACString& aPingName) const {
  nsCString err;
  if (fog_denominator_test_get_error(mId, &err)) {
    return Err(err);
  }
  if (!fog_denominator_test_has_value(mId, &aPingName)) {
    return Maybe<int32_t>();
  }
  return Some(fog_denominator_test_get_value(mId, &aPingName));
}

}  // namespace impl

/* virtual */
JSObject* GleanDenominator::WrapObject(JSContext* aCx,
                                       JS::Handle<JSObject*> aGivenProto) {
  return dom::GleanDenominator_Binding::Wrap(aCx, this, aGivenProto);
}

void GleanDenominator::Add(int32_t aAmount) { mDenominator.Add(aAmount); }

dom::Nullable<int32_t> GleanDenominator::TestGetValue(
    const nsACString& aPingName, ErrorResult& aRv) {
  dom::Nullable<int32_t> ret;
  auto result = mDenominator.TestGetValue(aPingName);
  if (result.isErr()) {
    aRv.ThrowDataError(result.unwrapErr());
    return ret;
  }
  auto optresult = result.unwrap();
  if (!optresult.isNothing()) {
    ret.SetValue(optresult.value());
  }
  return ret;
}

}  // namespace mozilla::glean
