local classes = {}
local registry = {}

function classes.createClass(classname)
	local class = {}
	class.__views = {}
	registry[classname] = class
	return class
end

function classes.createInstance(classname)
	local class = registry[classname];
	local inst = {}
	local meta = {}
	meta.__index = function(inst, key)
		return classes.indexClass(inst, class, key)
	end
	setmetatable(inst, meta)
	return inst
end

function classes.indexClass(inst, class, key)
	local view = getmetatable(inst).__view
	if view then
		local view = class.__views[view];
		if view[key] then
			return class[key]
		else
			error("not in view")
		end
	else
		return class[key]
	end
end

function classes.createView(classname, viewname)
	local class = registry[classname]
	local view = {}
	class.__views[viewname] = view
	return view
end

function classes.setInstanceView(instance, view)
	getmetatable(instance).__view = view
end

return classes