local export = {}

local LFW2008 = mw.loadData("Module:txg/data/LFW2008")

local meta = {
	[" "] = true,
	["-"] = true,
	["…"] = true
}

local meta_concat = {}
for char in pairs(meta) do
	table.insert(meta_concat, char)
end
meta_concat = require("Module:string utilities").pattern_escape(table.concat(meta_concat))

function export.tr(text, lang, sc)
	local UTF8_char = "[%z\1-\127\194-\244][\128-\191]*"
	local trtab = {}
	
	local i = 0
	for char in mw.ustring.gmatch(text, ".") do
		i = i + 1
		if meta[char] then
			table.insert(trtab, char)
		elseif char == "𖿠" and i > 1 then
			table.insert(trtab, trtab[i-1])
		else
			table.insert(trtab, LFW2008[char] or "?")
		end
	end
	text = table.concat(trtab, " ")
	
	text = text:gsub(" ?([" .. meta_concat .. "]) ?", "%1")
	
	local _, count = mw.ustring.gsub(text, "[" .. meta_concat .. "%?]", "")
	if count == mw.ustring.len(text) then
		return nil
	else
		return "*" .. text
	end
end

return export