local p = {}

local categoryHandler = require( 'Module:Category handler' ).main

local yesno = require('Module:Yesno')

local mArguments = require('Module:Arguments')

local n



function p.main (frame)

	local fulltitle = frame:getParent():getTitle()

	local templatetitle = string.sub(fulltitle, 10)

	local title = mw.title.getCurrentTitle()

	if mw.title.equals(title, mw.title.makeTitle('Template', title.rootText)) then --if it is on the main template page, load doc

		n = mArguments.getArgs(frame, {parentFirst = true})

		n.variant = n.variant or templatetitle --automatically use title generated from template name

		if  n.doc ~= 'no' then

			return frame:expandTemplate {title = 'English variant notice/documentation', args = n}

		end

	end

	return p._main (frame, templatetitle)

end



function p._main (frame, templatetitle)

	n = mArguments.getArgs(frame, {parentFirst = true})

	n.variant = n.variant or templatetitle --automatically use title generated from template name

	n.category = ''

	n.spelling_examples = n.spelling_examples or n'spelling examples'

	n.bid = not not n.id --bool of n.id, for making iupac and oxford not be added to the id if it doesn't exist

	--Generate the text if it isn't specified

	if not n.text then

		p.modify_text ()

		p.base_text (frame)

	end

	p.cat ('Wikipedia articles that use '..n.variant)

	return p.style(frame)..(n.category or '')

end



function p.cat (category)

	category = string.format ('[[Category:%s]]', category)

	n.category = n.category..(categoryHandler{category, nocat = n.nocat, page = n.page, talk = category, template = category} or '')

end



function p.modify_text ()

	n.spelling = ''

	n.extravariant = ''

	n.extraguide = ''

	bOxford = yesno(n.Oxford)

	bIUPAC = yesno(n.IUPAC)

	chemtext = "; ''aluminium'', ''sulfur'' and ''caesium''"

	if bOxford then

		n.spelling_examples = "''colour'', ''realize'', ''organization'', ''analyse''; note that '''-ize''' is used instead of -ise"

		p.cat ('Wikipedia articles that use Oxford spelling')

		if n.bid then n.id = n.id..n.Oxford end

		if bIUPAC then

			n.extravariant = ' with [[Oxford spelling|Oxford]] and [[IUPAC]] spelling'

			n.spelling_examples= n.spelling_examples..chemtext

			p.IUPAC ()

			return

		end

		n.extravariant = n.extravariant..' with [[Oxford spelling]]'

		return

	elseif bIUPAC then

		n.extravariant = ' with [[IUPAC]] spelling'

		n.spelling_examples = n.spelling_examples and n.spelling_examples..chemtext or "''aluminium'', ''sulfur'' and ''caesium''"

		p.IUPAC ()

		return

	end

	--only if there are spelling examples, put 'has its own spelling conventions'

	if n.spelling_examples then n.spelling = ', which has its own spelling conventions' end

end



function p.IUPAC ()

	n.extraguide = ' and [[Wikipedia:Naming conventions (chemistry)|chemistry naming conventions]]'

	p.cat('Wikipedia articles that use IUPAC spelling')

	n.flag = 'no'

	if n.bid then n.id = n.id..'iupac' end

end



function p.base_text (frame)

	n.subjectspace = require('Module:Pagetype').main()

	n.spelling_examples = n.spelling_examples and string.format(' (%s)', n.spelling_examples) or ''

	n.terms = n1 or n.terms

	n.terms = n.terms and string.format(' (including %s)', n.terms) or ''

	n.compare = n.compare and (n.compare..' ') or ''

	n.text = string.format([=[This %s is '''written in [[%s]]%s'''%s%s and some terms that are used in it%s may be different or absent from %sother [[List of dialects of English|varieties of English]]. According to the [[Wikipedia:Manual of Style#National varieties of English|relevant style guide]]%s, this should not be changed without [[Wikipedia:Consensus#Levels of consensus|broad consensus]].]=],

		n.subjectspace, n.variant, n.extravariant, n.spelling, n.spelling_examples, n.terms, n.compare, n.extraguide)

end



function p.style (frame)

	local size

	if yesno(n.small) then size = '30px'

	elseif n.size then size = n.size

	else size = '50px'

	end

	if n.image then

		if n.flag == nil or yesno(n.flag) then

			n.image = string.format('[[File:%s|%s]]', n.image, size)

		else

			--check if the globe should be "color" instead of "colour"

			if yesno(n.color) then

				n.image = string.format('[[File:Globe spelling color.png|%s]]', size)

			else

				n.image = string.format('[[File:Globe spelling colour.svg|%s]]', size)

			end

		end

	end

	if n.form == 'editnotice' then

		if n.bid then n.id = n.id..'editnotice' end

		n.expiry = n.expiry or 'indefinite'

		--categorize editnotice if specified

		if yesno(n.editnotice_cat) then

			p.cat(string.format('Pages with %s editnotice', n.variant))

		end

		return frame:expandTemplate{title = 'editnotice', args = n}

	else

		local message_box = require('Module:Message box').main

		if not n.image then n.image = 'none' end

		n'type' = 'style'

		return message_box ('tmbox', n)

	end	

end



return p