
#pragma once

#include "ItemGrid.h"





namespace Json
{
	class Value;
};

class cClientHandle;
class cPlayer;




// tolua_begin

/** This class represents the player's inventory
The slots are divided into three areas:
- armor slots     (1 x 4)
- inventory slots (9 x 3)
- hotbar slots    (9 x 1)
The generic GetSlot(), SetSlot() and HowManyCanFit() functions take the index of the slots,
as if armor slots, inventory slots and then hotbar slots were put one after another.
You can use the invArmorOffset, invInventoryOffset and invHotbarOffset constants.
*/

class cInventory :
	public cItemGrid::cListener
{
public:
	
	// Counts and offsets to individual parts of the inventory, as used by GetSlot() / SetSlot() / HowManyCanFit():
	enum
	{
		invArmorCount      = 4,
		invInventoryCount = 9 * 3,
		invHotbarCount    = 9,
		
		invArmorOffset     = 0,
		invInventoryOffset = invArmorOffset     + invArmorCount,
		invHotbarOffset    = invInventoryOffset + invInventoryCount,
		invNumSlots        = invHotbarOffset    + invHotbarCount
	} ;

	// tolua_end
	
	cInventory(cPlayer & a_Owner);
	
	// tolua_begin

	/// Removes all items from the entire inventory
	void Clear(void);

	/// Returns number of items out of a_ItemStack that can fit in the storage
	int HowManyCanFit(const cItem & a_ItemStack, bool a_ConsiderEmptySlots);

	/// Returns how many items of the specified type would fit into the slot range specified
	int HowManyCanFit(const cItem & a_ItemStack, int a_BeginSlotNum, int a_EndSlotNum, bool a_ConsiderEmptySlots);
	
	/** Adds as many items out of a_ItemStack as can fit.
	If a_AllowNewStacks is set to false, only existing stacks can be topped up;
	if a_AllowNewStacks is set to true, empty slots can be used for the rest.
	If a_tryToFillEquippedFirst is set to true, the currently equipped slot will be used first (if empty or
	compatible with added items)
	if a_tryToFillEquippedFirst is set to false, the regular order applies.
	Returns the number of items that fit.
	*/
	int AddItem(const cItem & a_ItemStack, bool a_AllowNewStacks = true, bool a_tryToFillEquippedFirst = false);

	/** Same as AddItem, but works on an entire list of item stacks.
	The a_ItemStackList is modified to reflect the leftover items.
	If a_AllowNewStacks is set to false, only existing stacks can be topped up;
	if a_AllowNewStacks is set to true, empty slots can be used for the rest.
	If a_tryToFillEquippedFirst is set to true, the currently equipped slot will be used first (if empty or
	compatible with added items)
	if a_tryToFillEquippedFirst is set to false, the regular order applies.
	Returns the total number of items that fit.
	*/
	int AddItems(cItems & a_ItemStackList, bool a_AllowNewStacks, bool a_tryToFillEquippedFirst);

	/// Removes one item out of the currently equipped item stack, returns true if successful, false if empty-handed
	bool RemoveOneEquippedItem(void);
	
	/// Returns the number of items of type a_Item that are stored
	int HowManyItems(const cItem & a_Item);
	
	/// Returns true if there are at least as many items of type a_ItemStack as in a_ItemStack
	bool HasItems(const cItem & a_ItemStack);
	
	/// Returns the cItemGrid object representing the armor slots
	cItemGrid & GetArmorGrid(void) { return m_ArmorSlots; }
	
	/// Returns the cItemGrid object representing the main inventory slots
	cItemGrid & GetInventoryGrid(void) { return m_InventorySlots; }
	
	/// Returns the cItemGrid object representing the hotbar slots
	cItemGrid & GetHotbarGrid(void) { return m_HotbarSlots; }
	
	/// Returns the player associated with this inventory
	cPlayer & GetOwner(void) { return m_Owner; }
	
	/// Copies the non-empty slots into a_ItemStacks; preserves the original a_Items contents
	void CopyToItems(cItems & a_Items);
	
	// tolua_end

	/// Returns the player associated with this inventory (const version)
	const cPlayer & GetOwner(void) const { return m_Owner; }
	
	// tolua_begin
	
	const cItem & GetSlot(int a_SlotNum) const;
	const cItem & GetArmorSlot(int a_ArmorSlotNum) const;
	const cItem & GetInventorySlot(int a_InventorySlotNum) const;
	const cItem & GetHotbarSlot(int a_HotBarSlotNum) const;
	const cItem & GetEquippedItem(void) const;
	void          SetSlot(int a_SlotNum, const cItem & a_Item);
	void          SetArmorSlot(int a_ArmorSlotNum, const cItem & a_Item);
	void          SetInventorySlot(int a_InventorySlotNum, const cItem & a_Item);
	void          SetHotbarSlot(int a_HotBarSlotNum, const cItem & a_Item);
	
	void          SetEquippedSlotNum(int a_SlotNum);
	int           GetEquippedSlotNum(void) { return m_EquippedSlotNum; }
	
	/** Adds (or subtracts, if a_AddToCount is negative) to the count of items in the specified slot.
	If the slot is empty, ignores the call.
	Returns the new count, or -1 if the slot number is invalid.
	*/
	int ChangeSlotCount(int a_SlotNum, int a_AddToCount);
	
	/// Adds the specified damage to the specified item; deletes the item and returns true if the item broke.
	bool DamageItem(int a_SlotNum, short a_Amount);

	/// Adds the specified damage to the currently held item; deletes the item and returns true if the item broke.
	bool DamageEquippedItem(short a_Amount = 1);
	
	const cItem & GetEquippedHelmet    (void) const { return m_ArmorSlots.GetSlot(0); }
	const cItem & GetEquippedChestplate(void) const { return m_ArmorSlots.GetSlot(1); }
	const cItem & GetEquippedLeggings  (void) const { return m_ArmorSlots.GetSlot(2); }
	const cItem & GetEquippedBoots     (void) const { return m_ArmorSlots.GetSlot(3); }

	// tolua_end
	
	/// Sends the slot contents to the owner
	void SendSlot(int a_SlotNum);

	/// Update items (e.g. Maps)
	void UpdateItems(void);

	/// Converts an armor slot number into the ID for the EntityEquipment packet
	static int ArmorSlotNumToEntityEquipmentID(short a_ArmorSlotNum);

	void SaveToJson(Json::Value & a_Value);
	bool LoadFromJson(Json::Value & a_Value);

protected:
	bool AddToBar( cItem & a_Item, const int a_Offset, const int a_Size, bool* a_bChangedSlots, int a_Mode = 0 );
	
	cItemGrid m_ArmorSlots;
	cItemGrid m_InventorySlots;
	cItemGrid m_HotbarSlots;

	int m_EquippedSlotNum;

	cPlayer & m_Owner;
	
	/// Returns the ItemGrid and the (grid-local) slot number for a (global) slot number; return NULL for invalid SlotNum
	const cItemGrid * GetGridForSlotNum(int a_SlotNum, int & a_GridSlotNum) const;
	
	/// Returns the ItemGrid and the (grid-local) slot number for a (global) slot number; return NULL for invalid SlotNum
	cItemGrid * GetGridForSlotNum(int a_SlotNum, int & a_GridSlotNum);
	
	// cItemGrid::cListener override:
	virtual void OnSlotChanged(cItemGrid * a_ItemGrid, int a_SlotNum) override;
};	// tolua_export




