--- @since 25.2.7

local function setup(_, opts)
	local type = opts and opts.type or ui.Border.ROUNDED
	local old_build = Tab.build

	Tab.build = function(self, ...)
		local bar = function(c, x, y)
			if x <= 0 or x == self._area.w - 1 then
				return ui.Bar(ui.Bar.TOP)
			end

			return ui.Bar(ui.Bar.TOP)
				:area(
					ui.Rect({
						x = x,
						y = math.max(0, y),
						w = ya.clamp(0, self._area.w - x, 1),
						h = math.min(1, self._area.h),
					})
				)
				:symbol(c)
		end

		local c = self._chunks
		self._chunks = {
			c[1]:pad(ui.Pad.y(1)),
			c[2]:pad(ui.Pad(1, c[3].w > 0 and 0 or 1, 1, c[1].w > 0 and 0 or 1)),
			c[3]:pad(ui.Pad.y(1)),
		}

		old_build(self, ...)
	end
end

return { setup = setup }