// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "Components/ActorComponent.h"
#include "GestureData.h"
#include "GestureManagerComponent.generated.h"

class AHandManager;

UCLASS(ClassGroup = "Gesture", BlueprintType, Blueprintable, ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) )
class TABLE_API UGestureManagerComponent : public UActorComponent
{
	GENERATED_BODY()

public:	
	// Sets default values for this component's properties
	UGestureManagerComponent();

protected:
	// Called when the game starts
	virtual void BeginPlay() override;

public:	

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Scale")
    float UEUnitsPerUnit = 100.f;  // set via calibration rectangle

	UPROPERTY(BlueprintReadOnly)
	AHandManager* HandManager;

    UFUNCTION(BlueprintCallable, Category = "Gesture")
    void EvaluateHands();
    
    UFUNCTION()
    void OnHandAdded(AHandActor* Hand);

    UFUNCTION()
    void OnHandRemoved(AHandActor* Hand);

    UPROPERTY(EditDefaultsOnly, Category = "Gesture")
    FString BindingConfigPath;   // path to the per-game JSON

    // Loaded from JSON — gesture name -> definition object
    UPROPERTY(BlueprintReadOnly, Category = "Gesture")
    TArray<UGestureDefinition*> GestureDefinitions;

    UPROPERTY(BlueprintReadOnly, Category = "Gesture")
    TArray<AGestureAction*> ActiveGestureActions;

    // Populated on BeginPlay from JSON
    UPROPERTY(BlueprintReadOnly, Category = "Gesture")
    TArray<FGestureBinding> GestureBindings;
    void LoadBindings(const FString& FilePath);

    void Initialize(UDataTable* InGestureTable, UDataTable* InActionTable);
    void BuildDefinitionMap();
    void BuildActionMap();

    // Populated on BeginPlay from the tables
    UPROPERTY(BlueprintReadOnly, Category = "Gesture")
    TMap<FName, UGestureDefinition*> DefinitionMap;

    UPROPERTY(BlueprintReadOnly, Category = "Gesture")
    TMap<FName, TSubclassOf<AGestureAction>> ActionClassMap;

private:
    // 
    UPROPERTY(EditDefaultsOnly, Category = "Gesture")
    UDataTable* GestureDefinitionTable;

    UPROPERTY(EditDefaultsOnly, Category = "Gesture")
    UDataTable* GestureActionTable;


    void CheckGestureDefinitions(TArray<AHandActor*>& Hands);
    void TriggerAction(AHandActor* Hand);
    void UpdateOngoingActions();

    AGestureAction* SpawnGestureAction(FName ActionName, AHandActor* Hand);
    bool TryExtendGestureAction(AHandActor* Hand);

    bool TryJoinExistingAction(AHandActor* Hand);
    bool TryCreateExtension(AHandActor* Hand);

    static constexpr int32 CandidateThreshold = 8;
    static constexpr int32 FailThreshold = 5;
};