Module:also/auto

local p = {}

local PAGENAME = mw.title.getCurrentTitle().text
local m_unicode = require("Module:Unicode data")
local m_data = require("Module:also/processed data") -- this contains only existing pages

function get_hashkey(word)
	buffer = mw.ustring.toNFKD(mw.ustring.lower(word))
	for k, v in pairs(m_data.customkeys) do
		buffer = mw.ustring.gsub(buffer, k, v)
	end
	hashkey = {}
	for cp in mw.ustring.gcodepoint(buffer) do
		table.insert(hashkey, is_valid(cp) and mw.ustring.char(cp) or "")
	end
	return table.concat(hashkey)
end

function is_valid(cp)
	category = m_unicode.lookup_category(cp)
	return (category:match("^.$") or category == "Mc" or category == "Sc") -- can't rely on built-in %w class
end

function p.main(frame)
	local hashkey = get_hashkey(PAGENAME)
	local data = m_data.lookups or {}
	for i, v in ipairs(frame:getParent().args) do -- if it has manual params
		table.insert(data, v)
	end

	if #data == 0 then
		error("This term does not exist in 'Module:also/processed data' and no parameter is given.")
	end

	local new_frame = frame:newChild{title = frame:getTitle(), args = data}
	function new_frame:getParent()
		return self
	end
	-- FIXME: move this to ] and integrate it properly.
	return require('Module:also/templates').also_t(new_frame)
end

return p