local export = {}
local u = mw.ustring.char
local a = u(0xF000)
local b = u(0xF001)
local c = u(0xF002)
local d = u(0xF003)
local e = u(0xF004)
local f = u(0xF005)
local g = u(0xF006)
local h = u(0xF007)

local monographs = {
	["ё"] = "е" .. a
}

local digraphs = {
	["гв"] = "г" .. a, ["гъ"] = "г" .. b, ["гь"] = "г" .. e, ["гӏ"] = "г" .. f, ["дж"] = "д" .. a, ["дз"] = "д" .. d, ["жв"] = "ж" .. a, ["жь"] = "ж" .. b, ["кв"] = "к" .. a, ["къ"] = "к" .. b, ["кь"] = "к" .. e, ["кӏ"] = "к" .. f, ["ль"] = "л" .. a, ["лӏ"] = "л" .. b, ["пӏ"] = "п" .. a, ["тл"] = "т" .. a, ["тш"] = "т" .. b, ["тӏ"] = "т" .. c, ["фӏ"] = "ф" .. a, ["хв"] = "х" .. a, ["хъ"] = "х" .. b, ["хь"] = "х" .. d, ["хӏ"] = "х" .. e, ["цӏ"] = "ц" .. a, ["чв"] = "ч" .. a, ["чӏ"] = "ч" .. b, ["шв"] = "ш" .. a, ["шӏ"] = "ш" .. b
}

local trigraphs = {
	["гъв"] = "г" .. c, ["гъь"] = "г" .. d, ["гӏв"] = "г" .. g, ["джв"] = "д" .. b, ["джь"] = "д" .. c, ["къв"] = "к" .. c, ["къь"] = "к" .. d, ["кӏв"] = "к" .. g, ["кӏь"] = "к" .. h, ["хъв"] = "х" .. c, ["хӏв"] = "х" .. f, ["чӏв"] = "ч" .. c
}

function export.makeSortKey(text, lang, sc)
	for from, to in pairs(trigraphs) do
		text = mw.ustring.gsub(text, from, to)
	end
	
	for from, to in pairs(digraphs) do
		text = mw.ustring.gsub(text, from, to)
	end
	
	for from, to in pairs(monographs) do
		text = mw.ustring.gsub(text, from, to)
	end
	
	return text
end

return export