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


#include "InventoryScreenWidget.h"

#include "Components/Button.h"
#include "Components/WidgetSwitcher.h"
#include "CraftingWidget.h"
#include "FpsPlayer.h"
#include "GameFramework/PlayerController.h"
#include "InventoryDragDropOperation.h"
#include "InventoryWidget.h"

void UInventoryScreenWidget::NativeConstruct()
{
	Super::NativeConstruct();

	if (InventoryTabButton)
	{
		InventoryTabButton->OnClicked.AddDynamic(this, &UInventoryScreenWidget::HandleInventoryTabClicked);
	}

	if (CraftingTabButton)
	{
		CraftingTabButton->OnClicked.AddDynamic(this, &UInventoryScreenWidget::HandleCraftingTabClicked);
	}

	ShowInventoryTab();
}

void UInventoryScreenWidget::BindToOwningPawn()
{
	if (InventoryPage)
	{
		InventoryPage->BindToOwningPawn();
	}

	if (CraftingPage)
	{
		CraftingPage->BindToOwningPawn();
	}
}

bool UInventoryScreenWidget::IsInventoryTabActive() const
{
	return TabSwitcher && InventoryPage && TabSwitcher->GetActiveWidget() == InventoryPage;
}

int32 UInventoryScreenWidget::GetHoveredSlotIndex() const
{
	if (!InventoryPage || !IsInventoryTabActive())
	{
		return INDEX_NONE;
	}

	return InventoryPage->GetHoveredSlotIndex();
}

void UInventoryScreenWidget::ShowInventoryTab()
{
	ShowPage(InventoryPage);
}

void UInventoryScreenWidget::ShowCraftingTab()
{
	ShowPage(CraftingPage);
}

void UInventoryScreenWidget::HandleInventoryTabClicked()
{
	ShowPage(InventoryPage);
}

void UInventoryScreenWidget::HandleCraftingTabClicked()
{
	ShowPage(CraftingPage);
}

void UInventoryScreenWidget::ShowPage(UWidget* Page)
{
	if (!TabSwitcher || !Page)
	{
		return;
	}

	TabSwitcher->SetActiveWidget(Page);

	// Le bouton de l'onglet courant est desactive : il sert d'indicateur de
	// position autant que de garde-fou contre un clic sans effet.
	const bool bInventoryActive = (Page == InventoryPage);

	if (InventoryTabButton)
	{
		InventoryTabButton->SetIsEnabled(!bInventoryActive);
	}

	if (CraftingTabButton)
	{
		CraftingTabButton->SetIsEnabled(bInventoryActive);
	}

	OnTabChanged.Broadcast(bInventoryActive);
}

bool UInventoryScreenWidget::NativeOnDrop(const FGeometry& InGeometry, const FDragDropEvent& InDragDropEvent, UDragDropOperation* InOperation)
{
	Super::NativeOnDrop(InGeometry, InDragDropEvent, InOperation);

	// On n'arrive ici que si ni une case ni la page d'inventaire n'ont traite le
	// depot : les enfants sont consultes en premier et arretent la propagation.
	const UInventoryDragDropOperation* Payload = Cast<UInventoryDragDropOperation>(InOperation);
	if (!Payload || Payload->SourceSlotIndex == INDEX_NONE)
	{
		return true;
	}

	if (const APlayerController* OwningController = GetOwningPlayer())
	{
		if (AFpsPlayer* PlayerPawn = Cast<AFpsPlayer>(OwningController->GetPawn()))
		{
			PlayerPawn->DropSlot(Payload->SourceSlotIndex, Payload->Quantity);
		}
	}

	return true;
}