--[[
	A simple inventory that holds 1 item
]]
local itm = nrequire("item.lua")
local ste = nrequire("utility/stream.lua")
local inventory = nrequire("inventory/inventory.lua")
local slots = {
	"Head",
	"Shoulders",
	"Chest",
	"Arms",
	"Hands",
	"Legs",
	"Belt",
	"Feet",
	"Back",
}

for k,v in pairs(slots) do
	local inv = {}
	inv.Name = "inv_" .. v
	inv.FindPlaceFor = function(self, item)
		if self.item == nil then return {} else return nil end
	end
	inv.CanFitIn = function(self,position,item)
		if self.item == nil then return true else return "Inventory slot occupied by a(n)" .. self.item.Name end
	end
	inv.Put = function(self,pos,item)
		self.item = item
	end
	inv.Has = function(self,prt)
		if type(prt) == "string" then
			if self.item ~= nil and self.item.Name == prt then return {} else return nil end
		elseif type(prt) == "function" then
			if prt(self.item) then return {} else return nil end
		end
		error(string.format("Passed a %s to %s:Has(), expected string or function",type(prt),self.Name))
	end
	inv.Remove = function(self,pos)
		self.item = nil
	end
	inv.Get = function(self,pos)
		return self.item
	end
	inv.Serialize = function(self)
		if self.item then
			local data = ste.CreateStream()
			local itemname = self.item.Name
			local itemdata = self.item:Serialize()
			data:WriteString(itemname)
			data:WriteString(itemdata)
			return data:ToString()
		end
		return ""
	end
	inv.DeSerialize = function(self,str)
		if str == "" then
			return table.Copy(self)
		else
			local data = ste.CreateStream(str)
			local itemname = data:ReadString()
			local itemdata = data:ReadString()
			self.item = itm.GetItemFromData(itemname,itemdata)
		end
	end
	inventory.RegisterInventory(inv)
end