/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 sts=2 et cindent: */

/* 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/dom/MIDIOutput.h"

#include "mozilla/dom/MIDIPortChild.h"

#include "mozilla/dom/MIDITypes.h"

#include "mozilla/dom/MIDIOutputBinding.h"

#include "mozilla/dom/MIDIUtils.h"

#include "nsDOMNavigationTiming.h"

#include "mozilla/TimeStamp.h"

#include "mozilla/dom/Performance.h"

using namespace mozilla;

using namespace mozilla::dom;

MIDIOutput::MIDIOutput(nsPIDOMWindowInner* aWindow, MIDIAccess* aMIDIAccessParent)

  : MIDIPort(aWindow, aMIDIAccessParent)

{

}

//static

MIDIOutput*

MIDIOutput::Create(nsPIDOMWindowInner* aWindow, MIDIAccess* aMIDIAccessParent,

                   const MIDIPortInfo& aPortInfo, const bool aSysexEnabled)

{

  MOZ_ASSERT(static_cast<MIDIPortType>(aPortInfo.type()) == MIDIPortType::Output);

  auto port = new MIDIOutput(aWindow, aMIDIAccessParent);

  if (NS_WARN_IF(!port->Initialize(aPortInfo, aSysexEnabled))) {

    return nullptr;

  }

  return port;

}

JSObject*

MIDIOutput::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)

{

  return MIDIOutput_Binding::Wrap(aCx, this, aGivenProto);

}

void

MIDIOutput::Send(const Sequence<uint8_t>& aData, const Optional<double>& aTimestamp, ErrorResult& aRv)

{

  if (mPort->DeviceState() == MIDIPortDeviceState::Disconnected) {

    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);

    return;

  }

  // The timestamp passed to us is a DOMHighResTimestamp, which is in relation

  // to the start of navigation timing. This needs to be turned into a

  // TimeStamp before it hits the platform specific MIDI service.

  //

  // If timestamp is either not set or zero, set timestamp to now and send the

  // message ASAP.

  TimeStamp timestamp;

  if (aTimestamp.WasPassed() && aTimestamp.Value() != 0) {

    nsCOMPtr<nsIDocument> doc = GetOwner()->GetDoc();

    if (!doc) {

      aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);

      return;

    }

    TimeDuration ts_diff = TimeDuration::FromMilliseconds(aTimestamp.Value());

    timestamp =

      GetOwner()->GetPerformance()->GetDOMTiming()->GetNavigationStartTimeStamp() + ts_diff;

  } else {

    timestamp = TimeStamp::Now();

  }

  nsTArray<MIDIMessage> msgArray;

  MIDIUtils::ParseMessages(aData, timestamp, msgArray);

  // Our translation of the spec is that invalid messages in a multi-message

  // sequence will be thrown out, but that valid messages will still be used.

  if (msgArray.IsEmpty()) {

    aRv.Throw(NS_ERROR_DOM_TYPE_ERR);

    return;

  }

  // TODO Move this check back to parse message so we don't have to iterate

  // twice.

  if (!SysexEnabled()) {

    for (auto& msg : msgArray) {

      if (MIDIUtils::IsSysexMessage(msg)) {

        aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);

        return;

      }

    }

  }

  mPort->SendSend(msgArray);

}

void

MIDIOutput::Clear()

{

  if (mPort->ConnectionState() == MIDIPortConnectionState::Closed) {

    return;

  }

  mPort->SendClear();

}