local p = {}



function p._current()

	out = {}

	for k, v in pairs(mw.site.interwikiMap("local")) do

		if v.isCurrentWiki then

			table.insert(out, k)

		end

	end

	return out

end



function p._map(isLocal)

	isLocal = isLocal and "local" or nil

	out = {}

	for k, v in pairs(mw.site.interwikiMap(isLocal)) do

		table.insert(out, k)

	end

	return out

end



function p._isCurrentIW(title)

	for _, v in ipairs(p._current()) do

		pattern = "^:?" .. v .. ":"

		if mw.ustring.match(title, pattern) then

			return true

		end

	end

	return false

end



function p._isValidIW(title, isLocal)

	for _, v in ipairs(p._map(isLocal)) do

		pattern = "^:?" .. v .. ":"

		if mw.ustring.match(title, pattern) then

			return true

		end

	end

	return false

end





local function current(args)

	return table.concat(p._current(), (args.sep or ", "))

end



local function map(args)

	return table.concat(p._map(args"local"]), (args.sep or ", "))

end



local function isCurrentIW(args)

	return p._isCurrentIW((args1 or ""))

end



local function ifCurrentIW(args)

	if p._isCurrentIW((args1 or "")) then

		return args2 or ""

	else

		return args3 or ""

	end

end



local function isValidIW(args)

	return p._isValidIW((args1 or ""), args"local"])

end



local function ifValidIW(args)

	if p._isValidIW((args1 or ""), args"local"]) then

		return args2 or ""

	else

		return args3 or ""

	end

end



local function makeWrapper(func)

    return function (frame)

        -- If called via #invoke, use the args passed into the invoking template.

        -- Otherwise, for testing purposes, assume args are being passed directly in.

        local origArgs

        if frame == mw.getCurrentFrame() then

            origArgs = frame:getParent().args

            for k, v in pairs(frame.args) do

                origArgs = frame.args

                break

            end

        else

            origArgs = frame

        end

 

        -- Strip whitespace, and treat blank arguments as nil.

        -- 'sep' has different behaviour depending on whether

        -- it is blank or nil, so keep it as it is.

        -- isLocal needs to be converted from a string to a bool.

        local args = {}

        for k, v in pairs(origArgs) do

            v = mw.text.trim(v)

            if v ~= '' or k == 'sep' then

                if k == 'local' then

                	t = {["true"=true,["false"=false}

                	argsk = (tv or v==true)

                else

                	argsk = v

                end

            end

        end

    

        return func(args)

    end

end



return {

    current = makeWrapper(current),

    map = makeWrapper(map),

    isCurrentIW = makeWrapper(isCurrentIW),

    ifCurrentIW = makeWrapper(ifCurrentIW),

    isValidIW = makeWrapper(isValidIW),

    ifValidIW = makeWrapper(ifValidIW)

}