local function ItemId(item)
	if type(item) == "table" then
		return item.id or (item.value ~= nil and item.value)
	end
	return item
end

local function ItemText(item)
	if type(item) == "table" then
		return item.name or item.text or item.id
	end
	return tostring(item)
end

DefineClass.XCheckButtonCombo = {
	__parents = { "XFontControl", "XContextControl" },
	properties = {
		{ category = "General", id = "Editable", editor = "bool", default = false, },
		{ category = "General", id = "Items", editor = "expression", default = false, params = "self" },
		{ category = "Interaction", id = "OnCheckButtonChanged", editor = "func", params = "self, id, value", default = empty_func },
		{ category = "Interaction", id = "OnTextChanged", editor = "func", params = "self, value", default = empty_func },
		{ category = "Interaction", id = "OnComboOpened", editor = "func", params = "self, popup", default = empty_func },
	},
	Padding = box(2, 1, 1, 1),
	BorderWidth = 1,
	BorderColor = RGB(128, 128, 128),
	DisabledBorderColor = RGBA(128, 128, 128, 128),
	Background = RGB(240, 240, 240),
	FocusedBackground = RGB(255, 255, 255),
	PopupBackground = RGB(255, 255, 255),
	
	last_text = false,
}

function XCheckButtonCombo:Init()
	XTextButton:new({
		Id = "idButton",
		Dock = "right",
		Padding = box(2, 3, 2, 1),
		Margins = box(2, 0, 0, 0),
		Icon = "CommonAssets/UI/arrowdown-40.tga",
		IconScale = point(500, 500),
		Background = RGB(38, 146, 227),
		RolloverBackground = RGB(24, 123, 197),
		PressedBackground = RGB(13, 113, 187),
		DisabledBackground = RGB(128, 128, 128),
		OnPress = function(button) self:Toggle() end,
	}, self)
	local edit = XEdit:new({
		Id = "idEdit",
		Dock = "box",
		VAlign = "center",
		BorderWidth = 0,
		AutoSelectAll = true,
		OnShortcut = function(edit, shortcut, source, ...)
			if shortcut == "Enter" then
				self:TextChanged()
				self:CloseCombo()
				return "break"
			end
			return XEdit.OnShortcut(edit, shortcut, source, ...)
		end,
		OnSetFocus = function(edit, ...)
			edit:SetEnabled(false)
			XEdit.OnSetFocus(edit, ...)
		end,
		OnKillFocus = function(edit, new_focus)
			edit:SetEnabled(self.Editable)
			
			local popup = self.popup
			if popup and new_focus and new_focus:IsWithin(popup) then
				return XEdit.OnKillFocus(edit)
			end
			self:TextChanged()
			return XEdit.OnKillFocus(edit)
		end,
	}, self)
	edit:SetFontProps(self)
	edit:SetEnabled(self.Editable)
end

function XCheckButtonCombo:SetEditable(value)
	self.idEdit:SetEnabled(value)
end

function XCheckButtonCombo:SetText(text)
	self.idEdit:SetText(text)
end

function XCheckButtonCombo:TextChanged()
	local text = self.idEdit:GetText()
	if text ~= self.last_text then
		self.last_text = text
		self:OnTextChanged(text)
	end
end

function XCheckButtonCombo:ResolveItems()
	local items = self.Items
	while type(items) == "function" do
		items = items(self)
	end
	return type(items) == "table" and items or empty_table
end

function XCheckButtonCombo:CloseCombo()
	local popup = rawget(self.desktop, "idCheckButtonComboPopup")
	if popup then
		popup:Close()
		return true
	end
end

function XCheckButtonCombo:Toggle()
	self:CloseCombo()
	
	local popup = XPopupList:new({
		Id = "idCheckButtonComboPopup",
		LayoutMethod = "VList",
		DrawOnTop = true,
		OnMouseButtonUp = function(self, pt, button)
			if button == "L" then
				if not self:MouseInWindow(pt) then
					self:Close()
				end
				return "break"
			elseif button == "R" then
				self:Close()
				return "break"
			end
		end,
	}, self.desktop)
	
	for idx, item in ipairs(self:ResolveItems()) do
		local check = XCheckButton:new({
			OnChange = function(checkbox, value) self:OnCheckButtonChanged(checkbox.Id, value) end,
			
			-- three state support
			Icon = "CommonAssets/UI/check-threestate-40.tga",
			IconRows = 3,
			OnPress = function(self)
				local row = self.IconRow + 1
				if row > 2 then
					row = 1
				end
				self:SetIconRow(row)
				self:OnRowChange(row)
			end,
			OnRowChange = function(self, row)
				if row ~= 3 then
					XCheckButton.OnRowChange(self, row)
				end
			end,
		}, popup.idContainer)
		
		check:SetFontProps(self)
		check:SetId(ItemId(item))
		check:SetText(ItemText(item))
		check:SetEnabled(item.read_only ~= true)
		if item.value == Undefined() then
			check:SetIconRow(3)
		else
			check:SetCheck(item.value)
		end
	end
	
	self:OnComboOpened(popup)
	popup.idContainer:SetBackground(self.PopupBackground)
	popup:SetAnchor(self.box)
	popup:SetAnchorType("drop")
	popup:Open()
	popup:SetModal()
	popup:SetFocus()
	popup.popup_parent = self
	if Platform.ged then
		g_GedApp:UpdateChildrenDarkMode(popup)
	end
	Msg("XWindowRecreated", popup)
end