#pragma once

#include "CoreMinimal.h"
#include "Widgets/SCompoundWidget.h"

class SWorldMap;
class UWorldMapDefinition;
template <typename T> class SComboBox;

/**
 * The World Map tab: the same SWorldMap the game draws, with a strip of controls above it and a click that
 * takes the viewport camera somewhere.
 *
 * The map widget is shared rather than reimplemented, which is the point of it being Slate. What differs here
 * is only what an editor has and a game does not: a choice of which world's map to look at, and a viewport to
 * send somewhere. There are no markers, because markers come from a UWorldMapSubsystem and an editor world
 * has none - that is not a gap, it is that nobody is playing.
 */
class SWorldMapPanel : public SCompoundWidget
{
public:
	SLATE_BEGIN_ARGS(SWorldMapPanel) {}
	SLATE_END_ARGS()

	void Construct(const FArguments& InArgs);

private:
	/** Every UWorldMapDefinition in the project, by asset registry. Editor-only, which is why it may do this. */
	void FindDefinitions();

	void SelectDefinition(TWeakObjectPtr<UWorldMapDefinition> Choice);
	void HandleMapClicked(FVector2D WorldCm);

	TSharedRef<SWidget> MakeToolbar();
	FText DefinitionLabel() const;
	FText LayerLabel() const;
	FText StatusLabel() const;

	TArray<TWeakObjectPtr<UWorldMapDefinition>> Definitions;
	TWeakObjectPtr<UWorldMapDefinition> Selected;

	TArray<TSharedPtr<FName>> LayerOptions;

	TSharedPtr<SWorldMap> Map;
	TSharedPtr<SComboBox<TSharedPtr<FName>>> LayerCombo;

	/** What the last click did, so a click that could not move a camera says why rather than doing nothing. */
	FText Status;
};

/** Registers and unregisters the tab with the global tab manager. Called by the module. */
namespace SaltyWorldMapTab
{
	extern const FName TabId;

	void Register();
	void Unregister();
}