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

#pragma once

#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "UObject/Object.h"
#include "AutoReimportManager.generated.h"

class FAutoReimportManager;

/** Struct representing a path on disk, and its virtual mount point */
struct FPathAndMountPoint
{
    FPathAndMountPoint() {}
    FPathAndMountPoint(FString InPath, FString InMountPoint): Path(MoveTemp(InPath)), MountPoint(MoveTemp(InMountPoint)) {}

    /** The directory on disk. Absolute. */
    FString Path;

    /** The mount point, if any to which this directory relates */
    FString MountPoint;
};

/* Deals with auto reimporting of objects when the objects file on disk is modified*/
UCLASS(config = Editor, transient)
class UNREALED_API UAutoReimportManager: public UObject
{
    GENERATED_UCLASS_BODY()
public:
    ~UAutoReimportManager();

    /** Initialize during engine startup */
    void Initialize();

    /** Get a list of absolute directories that we are monitoring */
    TArray<FPathAndMountPoint> GetMonitoredDirectories() const;

    /** Report an external change to the manager, such that a subsequent equal change reported by the os be ignored */
    void IgnoreNewFile(const FString& Filename);
    void IgnoreFileModification(const FString& Filename);
    void IgnoreMovedFile(const FString& SrcFilename, const FString& DstFilename);
    void IgnoreDeletedFile(const FString& Filename);

private:
    /** UObject Interface */
    virtual void BeginDestroy() override;

    /** Private implementation of the reimport manager */
    TSharedPtr<class FAutoReimportManager> Implementation;
};