/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=40: */
/* 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 "TelephonyCall.h"

#include "nsDOMClassInfo.h"

#include "CallEvent.h"
#include "Telephony.h"
#include "DOMError.h"

USING_TELEPHONY_NAMESPACE

// static
already_AddRefed<TelephonyCall>
TelephonyCall::Create(Telephony* aTelephony, const nsAString& aNumber,
                      uint16_t aCallState, uint32_t aCallIndex)
{
  NS_ASSERTION(aTelephony, "Null pointer!");
  NS_ASSERTION(!aNumber.IsEmpty(), "Empty number!");
  NS_ASSERTION(aCallIndex >= 1, "Invalid call index!");

  nsRefPtr<TelephonyCall> call = new TelephonyCall();

  call->BindToOwner(aTelephony->GetOwner());

  call->mTelephony = aTelephony;
  call->mNumber = aNumber;
  call->mCallIndex = aCallIndex;
  call->mError = nullptr;

  call->ChangeStateInternal(aCallState, false);

  return call.forget();
}

void
TelephonyCall::ChangeStateInternal(uint16_t aCallState, bool aFireEvents)
{
  nsRefPtr<TelephonyCall> kungFuDeathGrip(this);

  nsString stateString;
  switch (aCallState) {
    case nsIRadioInterfaceLayer::CALL_STATE_DIALING:
      stateString.AssignLiteral("dialing");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_ALERTING:
      stateString.AssignLiteral("alerting");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_BUSY:
      stateString.AssignLiteral("busy");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_CONNECTING:
      stateString.AssignLiteral("connecting");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_CONNECTED:
      stateString.AssignLiteral("connected");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_HOLDING:
      stateString.AssignLiteral("holding");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_HELD:
      stateString.AssignLiteral("held");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_RESUMING:
      stateString.AssignLiteral("resuming");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_DISCONNECTING:
      stateString.AssignLiteral("disconnecting");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_DISCONNECTED:
      stateString.AssignLiteral("disconnected");
      break;
    case nsIRadioInterfaceLayer::CALL_STATE_INCOMING:
      stateString.AssignLiteral("incoming");
      break;
    default:
      NS_NOTREACHED("Unknown state!");
  }

  mState = stateString;
  mCallState = aCallState;

  if (aCallState == nsIRadioInterfaceLayer::CALL_STATE_DIALING) {
    mOutgoing = true;
  }

  if (aCallState == nsIRadioInterfaceLayer::CALL_STATE_DISCONNECTED) {
    NS_ASSERTION(mLive, "Should be live!");
    mTelephony->RemoveCall(this);
    mLive = false;
  } else if (!mLive) {
    mTelephony->AddCall(this);
    mLive = true;
  }

  if (aFireEvents) {
    nsRefPtr<CallEvent> event = CallEvent::Create(this);
    NS_ASSERTION(event, "This should never fail!");

    if (NS_FAILED(event->Dispatch(ToIDOMEventTarget(),
                                  NS_LITERAL_STRING("statechange")))) {
      NS_WARNING("Failed to dispatch statechange event!");
    }

    // This can change if the statechange handler called back here... Need to
    // figure out something smarter.
    if (mCallState == aCallState) {
      event = CallEvent::Create(this);
      NS_ASSERTION(event, "This should never fail!");

      if (NS_FAILED(event->Dispatch(ToIDOMEventTarget(), stateString))) {
        NS_WARNING("Failed to dispatch specific event!");
      }
    }
  }
}

void
TelephonyCall::NotifyError(const nsAString& aError)
{
  // Set the error string
  NS_ASSERTION(!mError, "Already have an error?");

  mError = DOMError::CreateWithName(aError);

  // Do the state transitions
  ChangeStateInternal(nsIRadioInterfaceLayer::CALL_STATE_DISCONNECTED, true);

  // Notify the error event
  nsRefPtr<CallEvent> event = CallEvent::Create(this);
  NS_ASSERTION(event, "This should never fail!");

  if (NS_FAILED(event->Dispatch(ToIDOMEventTarget(),
                                NS_LITERAL_STRING("error")))) {
    NS_WARNING("Failed to dispatch error event!");
  }
}

NS_IMPL_CYCLE_COLLECTION_CLASS(TelephonyCall)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(TelephonyCall,
                                                  nsDOMEventTargetHelper)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_PTR(tmp->mTelephony->ToISupports(),
                                               Telephony, "mTelephony")
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(TelephonyCall,
                                                nsDOMEventTargetHelper)
  NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mTelephony)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TelephonyCall)
  NS_INTERFACE_MAP_ENTRY(nsIDOMTelephonyCall)
  NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(TelephonyCall)
NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)

NS_IMPL_ADDREF_INHERITED(TelephonyCall, nsDOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(TelephonyCall, nsDOMEventTargetHelper)

DOMCI_DATA(TelephonyCall, TelephonyCall)

NS_IMETHODIMP
TelephonyCall::GetNumber(nsAString& aNumber)
{
  aNumber.Assign(mNumber);
  return NS_OK;
}

NS_IMETHODIMP
TelephonyCall::GetState(nsAString& aState)
{
  aState.Assign(mState);
  return NS_OK;
}

NS_IMETHODIMP
TelephonyCall::GetError(nsIDOMDOMError** aError)
{
  NS_IF_ADDREF(*aError = mError);
  return NS_OK;
}

NS_IMETHODIMP
TelephonyCall::Answer()
{
  if (mCallState != nsIRadioInterfaceLayer::CALL_STATE_INCOMING) {
    NS_WARNING("Answer on non-incoming call ignored!");
    return NS_OK;
  }

  nsresult rv = mTelephony->RIL()->AnswerCall(mCallIndex);
  NS_ENSURE_SUCCESS(rv, rv);

  ChangeStateInternal(nsIRadioInterfaceLayer::CALL_STATE_CONNECTING, true);
  return NS_OK;
}

NS_IMETHODIMP
TelephonyCall::HangUp()
{
  if (mCallState == nsIRadioInterfaceLayer::CALL_STATE_DISCONNECTING ||
      mCallState == nsIRadioInterfaceLayer::CALL_STATE_DISCONNECTED) {
    NS_WARNING("HangUp on previously disconnected call ignored!");
    return NS_OK;
  }

  nsresult rv = mCallState == nsIRadioInterfaceLayer::CALL_STATE_INCOMING ?
                mTelephony->RIL()->RejectCall(mCallIndex) :
                mTelephony->RIL()->HangUp(mCallIndex);
  NS_ENSURE_SUCCESS(rv, rv);

  ChangeStateInternal(nsIRadioInterfaceLayer::CALL_STATE_DISCONNECTING, true);
  return NS_OK;
}

NS_IMETHODIMP
TelephonyCall::Hold()
{
  if (mCallState != nsIRadioInterfaceLayer::CALL_STATE_CONNECTED) {
    NS_WARNING("Hold non-connected call ignored!");
    return NS_OK;
  }
  
  nsresult rv = mTelephony->RIL()->HoldCall(mCallIndex);
  NS_ENSURE_SUCCESS(rv,rv);
  
  ChangeStateInternal(nsIRadioInterfaceLayer::CALL_STATE_HOLDING, true);
  return NS_OK;
}

NS_IMETHODIMP
TelephonyCall::Resume()
{
  if (mCallState != nsIRadioInterfaceLayer::CALL_STATE_HELD) {
    NS_WARNING("Resume non-held call ignored!");
    return NS_OK;
  }
  
  nsresult rv = mTelephony->RIL()->ResumeCall(mCallIndex);
  NS_ENSURE_SUCCESS(rv,rv);
  
  ChangeStateInternal(nsIRadioInterfaceLayer::CALL_STATE_RESUMING, true);
  return NS_OK;
}

NS_IMPL_EVENT_HANDLER(TelephonyCall, statechange)
NS_IMPL_EVENT_HANDLER(TelephonyCall, dialing)
NS_IMPL_EVENT_HANDLER(TelephonyCall, alerting)
NS_IMPL_EVENT_HANDLER(TelephonyCall, busy)
NS_IMPL_EVENT_HANDLER(TelephonyCall, connecting)
NS_IMPL_EVENT_HANDLER(TelephonyCall, connected)
NS_IMPL_EVENT_HANDLER(TelephonyCall, disconnecting)
NS_IMPL_EVENT_HANDLER(TelephonyCall, disconnected)
NS_IMPL_EVENT_HANDLER(TelephonyCall, holding)
NS_IMPL_EVENT_HANDLER(TelephonyCall, held)
NS_IMPL_EVENT_HANDLER(TelephonyCall, resuming)
NS_IMPL_EVENT_HANDLER(TelephonyCall, error)