// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "UObject/WeakObjectPtr.h"
#include "Logging/TokenizedMessage.h"

/**
 * A Message Log token that links to an object, with default behavior to link to the object
 * in the content browser/scene.
 */
class FUObjectToken: public IMessageToken
{
public:
    /** Factory method, tokens can only be constructed as shared refs */
    COREUOBJECT_API static TSharedRef<FUObjectToken> Create(const UObject* InObject, const FText& InLabelOverride = FText());

    /** Begin IMessageToken interface */
    virtual EMessageToken::Type GetType() const override
    {
        return EMessageToken::Object;
    }

    virtual const FOnMessageTokenActivated& GetOnMessageTokenActivated() const override;
    /** End IMessageToken interface */

    /** Get the object referenced by this token */
    virtual const FWeakObjectPtr& GetObject() const
    {
        return ObjectBeingReferenced;
    }

    /** Get the original object Path Name as the object path name could be different when fetched later on */
    const FString& GetOriginalObjectPathName() const
    {
        return OriginalObjectPathName;
    }

    /** Get the delegate for default token activation */
    COREUOBJECT_API static FOnMessageTokenActivated& DefaultOnMessageTokenActivated()
    {
        return DefaultMessageTokenActivated;
    }

    /** Get the delegate for displaying the object name */
    DECLARE_DELEGATE_RetVal_TwoParams(FText, FOnGetDisplayName, const UObject*, bool);
    COREUOBJECT_API static FOnGetDisplayName& DefaultOnGetObjectDisplayName()
    {
        return DefaultGetObjectDisplayName;
    }

private:
    /** Private constructor */
    COREUOBJECT_API FUObjectToken(const UObject* InObject, const FText& InLabelOverride);

    /** An object being referenced by this token, if any */
    FWeakObjectPtr ObjectBeingReferenced;

    /** The original object Path Name as the object path name could be different when fetched later on */
    FString OriginalObjectPathName;

    /** The default activation method, if any */
    COREUOBJECT_API static FOnMessageTokenActivated DefaultMessageTokenActivated;

    /** The default object name method, if any */
    COREUOBJECT_API static FOnGetDisplayName DefaultGetObjectDisplayName;
};