local p = {}



function p._main(frame, name, mode, check)

	local categories = {

		Flagicon = '[[Category:Flagicons with missing country data templates]]',

		Flagdeco = '[[Category:Flagdeco with missing country data templates]]',

	}



    local yesno = require('Module:Yesno')



	--Get input arguments

	local args = require('Module:Arguments').getArgs(frame,{frameOnly = ((frame.args.frameonly or '') ~= ''), valueFunc =

	function(key,value)

		if value then

			value = mw.text.trim(value)

			--Change empty string to nil for all args except 'image' and 'border'

			if key=="image" or key=="border" or value~="" then

				return value

			end

		end

		return nil

	end

	})

	

	local preftext = ""

	

	if name == 'Flag+link' then

		args.pref = args1

	elseif name == 'Flagathlete' then

		args.preftext = args1

		args2 = args.code or args2 or ""

		args.variant = args.variant or args3

	elseif name == 'Flagmedalist' then

		preftext = (args1 or "") .. "<br/>"

		args2 = args.code or args2 or ""

		args.variant = args.variant or args3

	else

		args.variant = args.variant or args2

		args2 = args1 or ""

	end



	args1 = mode .. (args.opts or '')

	args.missingcategory = categoriesname

	args.noredlink = args.noredlink or 'notext'



	if args.placeholder and yesno(args.placeholder) ~= true then

		args1 = args1 .. 'o'

	end



	if mw.title.getCurrentTitle().namespace == 0 then

		local unknown = '[[Category:Pages using ' .. mw.ustring.lower(name) .. ' template with unknown parameters|_VALUE_' ..

				frame:getParent():getTitle() .. ']]'

	else

		local unknown = ''

	end



	if check then

		local opts = {

            unknown=unknown,

            preview='Page using [[Template:' .. name .. ']] with unknown parameter "_VALUE_"',

            ignoreblank='y',

            '1',

            '2',

            'variant',

            'image',

            'size',

            'sz',

            'border',

            'align',

            'al',

            'width',

            'w',

            'alt',

            'ilink',

            'noredlink',

            'missingcategory',

            'name',

            'clink',

            'link',

            'pref',

            'suff',

            'plink',

            'the',

            'section',

            'altvar',

            'avar',

            'age',

            'nalign',

            'nal',

            'text',

            'nodata',

            'opts',

            'placeholder',

            'getParent',

            'frameonly'

		}



		check = require('Module:Check for unknown parameters')._check(opts,args)

	else

		check = ''

	end



	return preftext .. require('Module:Flagg').luaMain(frame,args) .. check

end



function p.main(frame) return p._main(frame,     'Flag',        'unc',  false) end

p.flag = p.main

p'' = p.main

function p.deco(frame) return p._main(frame,     'Flagdeco',    'uxx',   false) end

p.flagdeco = p.deco

function p.icon(frame) return p._main(frame,     'Flagicon',    'cxxl',  true) end

p.flagicon = p.icon

function p.pluslink(frame) return p._main(frame, 'Flag+link',   'unpefo', false) end

p'+link' = p.pluslink

p'flag+link' = p.pluslink

function p.country(frame) return p._main(frame,  'Flagcountry', 'unce',  false) end

p.flagcountry = p.country

function p.athlete(frame) return p._main(frame,  'Flagathlete', 'unape',   false) end

p.flagathlete = p.athlete

function p.medalist(frame) return p._main(frame,  'Flagmedalist', 'unce',   false) end

p.flagmedalist = p.medalist



return p