require('strict')
local p = {}

p.main = function(frame)
	local check_value = function(value)
		for n, v in pairs(frame.args) do
			if type(n)=='number' and v:lower()==value:lower() then
				return true
			end
		end
	end
	local match = false
	if frame.args.value and frame.args.value~='' then
		match = check_value(frame.args.value)
	elseif frame.args.values and frame.args.values~='' then
		for value in mw.text.gsplit(frame.args.values, "%s*,%s*") do
			if check_value(value) then
				match = true
				break
			end
		end
	end
	return match and 'yes' or 'no'
end

p.IfAnyEqual = function(frame)
	local parent = frame:getParent()
	if not parent.args then
		return nil
	end
	local prefix = frame.args.prefix~='' and frame.args.prefix or nil
	local check_value = function(value)
		if prefix then -- check parameters which have a matching prefix
			for name, v in pairs(parent.args) do
				if type(name)=='string' and name:find('^' .. prefix .. '%d*$') and v:lower()==value:lower() then
					return name
				end
			end
		else
			for pos, name in pairs(frame.args) do
				if type(pos)=='number' and parent.args[name] and parent.args[name]:lower()==value:lower() then
					return name
				end
			end
		end
	end
	local match = false
	if frame.args.value and frame.args.value~='' then
		match = check_value(frame.args.value)
	elseif frame.args.values and frame.args.values~='' then
		for value in mw.text.gsplit(frame.args.values, "%s*,%s*") do
			local check = check_value(value)
			if check then
				match = check
				break
			end
		end
	end
	return match and 'yes' or 'no'
end

return p