// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once

#include "CoreMinimal.h"
#include "TraceServices/Model/Frames.h"
#include "IRewindDebugger.generated.h"

// IRewindDebugger
//
// Public interface to rewind debugger

REWINDDEBUGGERINTERFACE_API DECLARE_LOG_CATEGORY_EXTERN(LogRewindDebugger, Log, All);

namespace TraceServices
{
	class IAnalysisSession;
}

struct FDebugObjectInfo
{
	FDebugObjectInfo(uint64 Id, const FString& Name): ObjectId(Id), ObjectName(Name), bExpanded(true)
	{
	}

	uint64 ObjectId;
	FString ObjectName;
	bool bExpanded;

	TArray<TSharedPtr<FDebugObjectInfo>> Children;
};

namespace RewindDebugger
{
	class FRewindDebuggerTrack;
	class FPropertiesTrack;
}

UCLASS()
class REWINDDEBUGGERINTERFACE_API UComponentContextMenuContext : public UObject
{
	GENERATED_BODY()
public:
	TSharedPtr<FDebugObjectInfo> SelectedObject;
	TArray<FName> TypeHierarchy;
	TSharedPtr<RewindDebugger::FRewindDebuggerTrack> SelectedTrack;
};

class SPropertiesDebugViewBase;

class REWINDDEBUGGERINTERFACE_API IRewindDebugger
{
public:
	IRewindDebugger();

	virtual ~IRewindDebugger();

	// get the time the debugger is scrubbed to, in seconds since the capture started (or the recording duration while the game is running)
	virtual double CurrentTraceTime() const = 0;
	
	// get the time the debugger is scrubbed to, in seconds since the recording started
	virtual double GetScrubTime() const = 0;

	// current visible range in trace/profiler units (same units as CurrentTraceTime)
	virtual const TRange<double>& GetCurrentTraceRange() const = 0;
	
	// current visible range in Rewind Debugger recording time units
	virtual const TRange<double>& GetCurrentViewRange() const = 0;

	// get the current analysis session
	virtual const TraceServices::IAnalysisSession* GetAnalysisSession() const = 0;

	// get insights id for the selected target actor
	virtual uint64 GetTargetActorId() const = 0;

	// get a list of all components of the selected target actor (with the actor as the first element in the list)
	virtual TArray<TSharedPtr<FDebugObjectInfo>>& GetDebugComponents() = 0;

	// check if the given object id is a debug component, or a child or a debug component
	virtual bool IsContainedByDebugComponent(uint64 ObjectId) const = 0;
	
	// returns the currently selected debug component
	virtual TSharedPtr<FDebugObjectInfo> GetSelectedComponent() const = 0;

	// returns the currently selected track
	virtual TSharedPtr<RewindDebugger::FRewindDebuggerTrack> GetSelectedTrack() const = 0;
	
	// get posiotion of the selected target actor (returns true if position is valid)
	virtual bool GetTargetActorPosition(FVector& OutPosition) const = 0;

	// get the world that the debugger is replaying in
	virtual UWorld* GetWorldToVisualize() const = 0;

	// returns true if recording is active
	virtual bool IsRecording() const = 0;

	// returns true if we have loaded a trace file from disk
	virtual bool IsTraceFileLoaded() const = 0;

	// returns true if PIE is running and not paused
	virtual bool IsPIESimulating() const = 0;

	// returns the length of the current recording
	virtual double GetRecordingDuration() const = 0;

	// opens the Rewind Debugger details panel tab
	virtual void OpenDetailsPanel() = 0;
	
	virtual const struct FObjectInfo* FindOwningActorInfo(const class IGameplayProvider* GameplayProvider, uint64 ObjectId) const = 0;

	virtual bool ShouldDisplayWorld(uint64 WorldId) = 0;

	// get the current IRewindDebugger instance
	static IRewindDebugger* Instance();
	
protected:
	static IRewindDebugger* InternalInstance;
};