/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */

#ifndef mozilla_dom_PaymentRequest_h
#define mozilla_dom_PaymentRequest_h

#include "mozilla/DOMEventTargetHelper.h"
#include "mozilla/dom/PaymentRequestBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/PromiseNativeHandler.h"
#include "mozilla/ErrorResult.h"
#include "nsIDocumentActivity.h"
#include "nsWrapperCache.h"
#include "PaymentRequestUpdateEvent.h"

namespace mozilla {
namespace dom {

class EventHandlerNonNull;
class PaymentAddress;
class PaymentRequestChild;
class PaymentResponse;
class ResponseData;

class PaymentRequest final
  : public DOMEventTargetHelper
  , public PromiseNativeHandler
  , public nsIDocumentActivity
{
public:
  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(PaymentRequest,
                                                         DOMEventTargetHelper)
  NS_DECL_NSIDOCUMENTACTIVITY

  virtual JSObject* WrapObject(JSContext* aCx,
                               JS::Handle<JSObject*> aGivenProto) override;

  static already_AddRefed<PaymentRequest> CreatePaymentRequest(
    nsPIDOMWindowInner* aWindow,
    nsresult& aRv);

  static bool PrefEnabled(JSContext* aCx, JSObject* aObj);

  static nsresult IsValidStandardizedPMI(const nsAString& aIdentifier,
                                         nsAString& aErrorMsg);

  static nsresult IsValidPaymentMethodIdentifier(const nsAString& aIdentifier,
                                                 nsAString& aErrorMsg);

  static nsresult IsValidMethodData(
    JSContext* aCx,
    const Sequence<PaymentMethodData>& aMethodData,
    nsAString& aErrorMsg);

  static nsresult IsValidNumber(const nsAString& aItem,
                                const nsAString& aStr,
                                nsAString& aErrorMsg);
  static nsresult IsNonNegativeNumber(const nsAString& aItem,
                                      const nsAString& aStr,
                                      nsAString& aErrorMsg);

  static nsresult IsValidCurrencyAmount(const nsAString& aItem,
                                        const PaymentCurrencyAmount& aAmount,
                                        const bool aIsTotalItem,
                                        nsAString& aErrorMsg);

  static nsresult IsValidCurrency(const nsAString& aItem,
                                  const nsAString& aCurrency,
                                  nsAString& aErrorMsg);

  static nsresult IsValidDetailsInit(const PaymentDetailsInit& aDetails,
                                     const bool aRequestShipping,
                                     nsAString& aErrorMsg);

  static nsresult IsValidDetailsUpdate(const PaymentDetailsUpdate& aDetails,
                                       const bool aRequestShipping);

  static nsresult IsValidDetailsBase(const PaymentDetailsBase& aDetails,
                                     const bool aRequestShipping,
                                     nsAString& aErrorMsg);

  static already_AddRefed<PaymentRequest> Constructor(
    const GlobalObject& aGlobal,
    const Sequence<PaymentMethodData>& aMethodData,
    const PaymentDetailsInit& aDetails,
    const PaymentOptions& aOptions,
    ErrorResult& aRv);

  already_AddRefed<Promise> CanMakePayment(ErrorResult& aRv);
  void RespondCanMakePayment(bool aResult);

  already_AddRefed<Promise> Show(
    const Optional<OwningNonNull<Promise>>& detailsPromise,
    ErrorResult& aRv);
  void RespondShowPayment(const nsAString& aMethodName,
                          const ResponseData& aDetails,
                          const nsAString& aPayerName,
                          const nsAString& aPayerEmail,
                          const nsAString& aPayerPhone,
                          nsresult aRv);
  void RejectShowPayment(nsresult aRejectReason);
  void RespondComplete();

  already_AddRefed<Promise> Abort(ErrorResult& aRv);
  void RespondAbortPayment(bool aResult);

  nsresult RetryPayment(JSContext* aCx, const PaymentValidationErrors& aErrors);

  void GetId(nsAString& aRetVal) const;
  void GetInternalId(nsAString& aRetVal);
  void SetId(const nsAString& aId);

  bool Equals(const nsAString& aInternalId) const;

  bool ReadyForUpdate();
  bool IsUpdating() const { return mUpdating; }
  void SetUpdating(bool aUpdating);

  already_AddRefed<PaymentResponse> GetResponse() const;

  already_AddRefed<PaymentAddress> GetShippingAddress() const;
  // Update mShippingAddress and fire shippingaddresschange event
  nsresult UpdateShippingAddress(const nsAString& aCountry,
                                 const nsTArray<nsString>& aAddressLine,
                                 const nsAString& aRegion,
                                 const nsAString& aRegionCode,
                                 const nsAString& aCity,
                                 const nsAString& aDependentLocality,
                                 const nsAString& aPostalCode,
                                 const nsAString& aSortingCode,
                                 const nsAString& aOrganization,
                                 const nsAString& aRecipient,
                                 const nsAString& aPhone);

  void SetShippingOption(const nsAString& aShippingOption);
  void GetShippingOption(nsAString& aRetVal) const;
  void GetOptions(PaymentOptions& aRetVal) const;
  void SetOptions(const PaymentOptions& aOptions);
  nsresult UpdateShippingOption(const nsAString& aShippingOption);

  nsresult UpdatePayment(JSContext* aCx,
                         const PaymentDetailsUpdate& aDetails,
                         bool aDeferredShow);
  void AbortUpdate(nsresult aRv, bool aDeferredShow);

  void SetShippingType(const Nullable<PaymentShippingType>& aShippingType);
  Nullable<PaymentShippingType> GetShippingType() const;

  inline void ShippingWasRequested() { mRequestShipping = true; }

  void ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
  void RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;

  IMPL_EVENT_HANDLER(merchantvalidation);
  IMPL_EVENT_HANDLER(shippingaddresschange);
  IMPL_EVENT_HANDLER(shippingoptionchange);
  IMPL_EVENT_HANDLER(paymentmethodchange);

  void SetIPC(PaymentRequestChild* aChild) { mIPC = aChild; }

  PaymentRequestChild* GetIPC() const { return mIPC; }

private:
  PaymentOptions mOptions;

protected:
  ~PaymentRequest();

  void RegisterActivityObserver();
  void UnregisterActivityObserver();

  nsresult DispatchUpdateEvent(const nsAString& aType);

  nsresult DispatchMerchantValidationEvent(const nsAString& aType);

  PaymentRequest(nsPIDOMWindowInner* aWindow, const nsAString& aInternalId);

  // Id for internal identification
  nsString mInternalId;
  // Id for communicating with merchant side
  // mId is initialized to details.id if it exists
  // otherwise, mId has the same value as mInternalId.
  nsString mId;
  // Promise for "PaymentRequest::CanMakePayment"
  RefPtr<Promise> mResultPromise;
  // Promise for "PaymentRequest::Show"
  RefPtr<Promise> mAcceptPromise;
  // Promise for "PaymentRequest::Abort"
  RefPtr<Promise> mAbortPromise;
  // Resolve mAcceptPromise with mResponse if user accepts the request.
  RefPtr<PaymentResponse> mResponse;
  // The redacted shipping address.
  RefPtr<PaymentAddress> mShippingAddress;
  // The full shipping address to be used in the response upon payment.
  RefPtr<PaymentAddress> mFullShippingAddress;
  // It is populated when the user chooses a shipping option.
  nsString mShippingOption;

  Nullable<PaymentShippingType> mShippingType;

  // "true" when there is a pending updateWith() call to update the payment
  // request and "false" otherwise.
  bool mUpdating;

  // Whether shipping was requested. This models [[options]].requestShipping,
  // but we don't actually store the full [[options]] internal slot.
  bool mRequestShipping;

  // True if the user passed a promise to show, causing us to defer telling the
  // front end about it.
  bool mDeferredShow;

  // The error is set in AbortUpdate(). The value is NS_OK by default.
  nsresult mUpdateError;

  enum
  {
    eUnknown,
    eCreated,
    eInteractive,
    eClosed
  } mState;

  PaymentRequestChild* mIPC;
};
} // namespace dom
} // namespace mozilla

#endif // mozilla_dom_PaymentRequest_h