local mHatnote = require('Module:Hatnote')

local mHatlist = require('Module:Hatnote list')

local mYesno = require('Module:Yesno')

local mArguments --initialize lazily

local p = {}



function p.technicalReasons (frame)

	mArguments = require('Module:Arguments')

	local args = mArguments.getArgs(frame)

	return p._technicalReasons(args)

end



function p._technicalReasons (args)

	--Return an error if no redirect's provided

	if not args1 then

		return mHatnote.makeWikitextError(

			'no redirect provided',

			'Template:Technical reasons',

			args.category

		)

	end

	--get maxArg manually because getArgs() and table.maxn aren't friends

	local maxArg = 0

	for k, v in pairs(args) do

		if type(k) == 'number' and k > maxArg then maxArg = k end

	end

	--If there's only 1–2 arguments, set from to 1 to default things nicely.

	--Note that if (not args[2]) this doesn't matter either way.

	local from = maxArg > 2 and 2 or 1

	--Structure the forSee table

	local forSee = mHatlist.forSeeArgsToTable(args, from)

	--Suppresses defaulting; for-see table rows that would include defaulting

	--are set to nil.

	for k, v in pairs(forSee) do

		if not v.use or #v.pages == 0 then forSeek = nil end

	end

	--Stringify the forSee table or set it nil

	forSee = #forSee ~= 0 and mHatlist.forSeeTableToString(forSee) or nil

	local whatRedirects = mYesno(args.prefix) and 'terms beginning with "' .. args1 .. '" redirect' or '"' .. args1 .. '" redirects'

	local lead = string.format(

		'For [[Wikipedia:Naming conventions (technical restrictions)|technical reasons]], %s here.',

		whatRedirects

	)

	local text = table.concat({lead, forSee}, ' ')

	

	local options = {extraclasses = 'plainlinks selfreference noprint', selfref = true}

	

	return mHatnote._hatnote(text, options)

end



return p