/*
 * CTradeBase.h, part of VCMI engine
 *
 * Authors: listed in file AUTHORS in main folder
 *
 * License: GNU General Public License v2.0 or later
 * Full text of license available in license.txt file, in main folder
 *
 */
#pragma once

#include "Images.h"

#include "../../lib/FunctionList.h"

VCMI_LIB_NAMESPACE_BEGIN

class IMarket;
class CGHeroInstance;

VCMI_LIB_NAMESPACE_END

class CButton;
class CTextBox;

class CTradeBase
{
public:
	enum EType
	{
		RESOURCE, PLAYER, ARTIFACT_TYPE, CREATURE, CREATURE_PLACEHOLDER, ARTIFACT_PLACEHOLDER, ARTIFACT_INSTANCE
	};

	class CTradeableItem : public CIntObject, public std::enable_shared_from_this<CTradeableItem>
	{
		std::shared_ptr<CAnimImage> image;
		AnimationPath getFilename();
		int getIndex();
	public:
		const CArtifactInstance * hlp; //holds ptr to artifact instance id type artifact
		EType type;
		int id;
		const int serial;
		const bool left;
		std::string subtitle; //empty if default
		std::function<void(std::shared_ptr<CTradeableItem> altarSlot)> clickPressedCallback;

		void setType(EType newType);
		void setID(int newID);

		const CArtifactInstance* getArtInstance() const;
		void setArtInstance(const CArtifactInstance * art);

		CFunctionList<void()> callback;
		bool downSelection;

		void showAllAt(const Point & dstPos, const std::string & customSub, Canvas & to);

		void showPopupWindow(const Point & cursorPosition) override;
		void hover(bool on) override;
		void showAll(Canvas & to) override;
		void clickPressed(const Point & cursorPosition) override;
		std::string getName(int number = -1) const;
		CTradeableItem(Point pos, EType Type, int ID, bool Left, int Serial);
	};

	const IMarket * market;
	const CGHeroInstance * hero;

	//all indexes: 1 = left, 0 = right
	std::array<std::vector<std::shared_ptr<CTradeableItem>>, 2> items;

	//highlighted items (nullptr if no highlight)
	std::shared_ptr<CTradeableItem> hLeft;
	std::shared_ptr<CTradeableItem> hRight;
	std::shared_ptr<CButton> deal;

	CTradeBase(const IMarket * market, const CGHeroInstance * hero);
	void removeItems(const std::set<std::shared_ptr<CTradeableItem>> & toRemove);
	void removeItem(std::shared_ptr<CTradeableItem> item);
	void getEmptySlots(std::set<std::shared_ptr<CTradeableItem>> & toRemove);
	virtual void makeDeal() = 0;

protected:
	std::vector<std::shared_ptr<CLabel>> labels;
	std::vector<std::shared_ptr<CButton>> buttons;
	std::vector<std::shared_ptr<CTextBox>> texts;
};