local p = {}
local configfile = '모듈:Authority control/config' -- default configuation module
local arg = mw.getCurrentFrame.args.config
if arg and arg~='' then
	configfile = '모듈:Authority control/config/' .. arg
end
local config
if mw.title.new(configfile).exists then
	config = mw.loadData(configfile)
else
	return error
end
local title = mw.title.getCurrentTitle
local namespace = title.namespace
local testcases = title.subpageText == config.i18n.testcases

local function needsAttention(sortkey)
	return '' .. sortkey .. title.text .. ''
end

local function addCat
	if cat and cat ~= '' and (namespace == 0 or namespace == 14 or testcases) then
		local redlinkcat = ''
		if testcases == false and mw.title.new.exists == false then
			redlinkcat = needsAttention('N')
		end
		if sortkey then
			cat = '' .. sortkey .. title.text .. ''
		else
			cat = '' .. config.i18n.category .. ':'..cat..''
		end
		cat = cat .. redlinkcat
		return cat
	else
		return ''
	end
end

local function getCatForId
	local cat = ''
	if faulty then cat = cat .. config.i18n.faulty .. ' ' end
	cat = id..' ' .. config.i18n.Articles_with
	return addCat(cat)
end

local function getIdsFromWikidata
	local function getquals
		if statement.qualifiers and statement.qualifiers['P'..qualid] then
			return mw.wikibase.renderSnak(statement.qualifiers['P'..qualid][1])
		else
			return false
		end
	end
	local ids = {}
	if qid then
		for _, statement in ipairs(mw.wikibase.getBestStatements) do
			if statement.mainsnak.datavalue then
				local val = statement.mainsnak.datavalue.value
				if val then
					local namedas = getquals or getquals or ''
					table.insert
				end
			end
		end
	end
	return ids
end

local _makelink = function --validate values and create a link
	local function tooltip
		if label and label~='' then
			return mw.getCurrentFrame:expandTemplate{title = "말풍선", args = {text,label}}
		else
			return text
		end
	end
	local link
	if nextid==1 then
		if conf.prefix then
			link = '*' .. conf.prefix .. '\n**'
		else
			link = '*'
		end
	else
		link = '\n**'
	end
	local valid_value = false
	if conf.customlink then -- use function to validate and generate link
		local label = nextid>1 and nextid
		local newlink= require(config.auxiliary)[conf.customlink]
		if newlink then
			link = link .. newlink
			valid_value = true
		end
	else
		if conf.pattern then -- use pattern to determine validity if defined
			valid_value = string.match
		elseif conf.patterns then
			for _,pattern in ipairs(conf.patterns) do
				valid_value = val.id:match('^'..pattern..'$')
				if valid_value then break end
			end
		elseif conf.valid then -- otherwise use function to determine validity
			valid_value = require(config.auxiliary)[conf.valid](val.id)
		else -- no validation possible
			valid_value = val.id
		end
		if valid_value then
			local newlink
			local label = conf.label
			if not label or nextid>1 then
				label = tostring(nextid)
			end
			if conf.link then
				valid_value = valid_value:gsub
				newlink = '[' .. mw.ustring.gsub .. ' ' .. label .. ']'
			else
				newlink = valid_value
			end
			link = link .. ''
		end
	end
	if valid_value then
		link = link .. getCatForId(conf.category or conf[1])
	else
		--local preview = require("Module:If preview")
		local wdlink = qid and ':wikidata:' .. qid .. '#P' .. conf.property .. '' or ''
		link = link .. '[[파일:' .. config.i18n.warningicon .. '|20px|frameless|link=' .. wdlink .. '|' .. config.i18n.The .. ' ' .. conf[1] .. ' ' .. config.i18n.identifier .. ' ' .. val.id .. ' ' .. config.i18n.isnotvalid .. '.]]'
		if conf.errorcat then
			link = link .. addCat(conf.errorcat)
		else
			link = link .. getCatForId
		end
		link = link .. addCat-- .. preview._warning({'The '..conf[1]..' id '..val..' is not valid.'})
	end
	return link
end

--==========================================================================
-- Main 
--==========================================================================
function p.authorityControl(frame)
	local function resolveQID(qid)
		if qid then
			qid = 'Q'..mw.ustring.gsub
			if mw.wikibase.isValidEntityId(qid) and mw.wikibase.entityExists(qid) then
				local sitelink = mw.wikibase.getSitelink(qid)
				if sitelink then
					return mw.wikibase.getEntityIdForTitle(sitelink) or mw.wikibase.getEntity(qid).id
				end
				return mw.wikibase.getEntity(qid).id
			end
		end
	end
	local conf = config.config
	local parentArgs = frame:getParent.args
	local auxCats = ''
	local rct = false -- boolean to track if there are any links to be returned
	local qid,topic
	if namespace == 0 then
		qid = mw.wikibase.getEntityIdForCurrentPage
	end
	if qid then -- article is connected to Wikidata item
		if parentArgs.qid and (resolveQID(parentArgs.qid) ~= qid) then -- non-matching qid parameter
			auxCats = auxCats .. needsAttention('D')
		end
	else -- page is not connected to any Wikidata item
		qid = resolveQID(parentArgs.qid) -- check qid parameter if no wikidata item is connected
		if qid then -- qid parameter is valid, set topic to display
			topic = mw.wikibase.getLabel(qid)
			if topic then
				if mw.ustring.lower(title.subpageText) == mw.ustring.lower(topic) then -- suppress topic display if subpagename equals topic up to case change
					topic = nil
				end
				if topic and mw.wikibase.getSitelink(qid) then -- make wikilink to article
					topic = '' .. topic .. ''
				end
			else
				auxCats = auxCats .. needsAttention('L')
			end
		elseif parentArgs.qid and parentArgs.qid~='' then -- invalid qid has been supplied, add to tracking cat
			auxCats = auxCats .. needsAttention('Q')
		end
	end
	local qids = {} -- setup any additional QIDs
	if parentArgs.additional=='auto' and qid then -- check P527 for parts to add additional qids
		local checkparts = function(property)
			local parts = mw.wikibase.getBestStatements
			if parts then
				for _,part in ipairs(parts) do
					if part.mainsnak.datavalue and part.mainsnak.datavalue.value.id then
						local resolvedqid = resolveQID(part.mainsnak.datavalue.value.id)
						if resolvedqid then
							table.insert
		end end end end end
		for _,part in ipairs(config.auto_additional) do
			checkparts('P'..tostring(part))
		end
	elseif parentArgs.additional and parentArgs.additional ~= '' then
		for _,v in ipairs(mw.text.split) do
			v = resolveQID(v)
			if v then
				if v == qid then -- duplicate of qid parameter
					auxCats = auxCats .. needsAttention('R')
				end
				table.insert
			else -- invalid QID specified
				auxCats = auxCats .. needsAttention('A')
			end
		end
	end

	local sections = {}
	local localparams = false
	local numsections = 0
	for _,_ in ipairs(config.sections) do numsections = numsections + 1 end
	for _ = 1,#qids+numsections do table.insert end
	local qslink = '' -- setup link to add using QuickStatements

	-- check which identifiers to show/suppress in template
	local show = {} -- setup list
	local showall = true
	local function stripP(pid)
		if pid:match("^[Pp]%d+$") then
			pid = mw.ustring.gsub --strip P from property number
		end
		if pid:match("^%d+$") then
			return tonumber(pid)
		end
	end
	local function addshowlist(list)
		if list and list ~= '' then
			for _,v in ipairs(mw.text.split(string.lower(list),"%s*,%s*")) do
				local vprop = stripP(v)
				if vprop then -- e.g. show=P214 to show one particular property
					show[vprop] = true
				else -- e.g. show=arts to use whitelist
					if config.whitelists[v] then
						for _,w in ipairs(config.whitelists[v].properties) do
							show[w] = true
						end
					end
				end
			end
			showall = false
		end
	end
	addshowlist(frame.args.show) -- check show= parameter on wrapper template
	addshowlist(parentArgs.show or parentArgs.country) -- check show parameter on article template
	if parentArgs.suppress then
		local suppresslist = mw.text.split -- split parameter by comma
		for _,v in ipairs(suppresslist) do
			v = stripP(string.upper(v))
			if v then
				show[v] = false
				auxCats = auxCats .. '' .. config.i18n.category .. ':' .. config.i18n.suppressedcat .. ''
			else
				auxCats = auxCats .. needsAttention('P')
			end
		end
	end
	
	local function makeSections
		local tval = {}
		local function parameter_is_used(property)
			local used = false
			if property then
				if tval[property] then
					if tval[property][1] then
						used = true
					end
				elseif tval[property] == false then -- property has been manually suppressed
					used = true
				end
			end
			return used
		end
		for _, params in ipairs(conf) do
			tval[params.property] = getIdsFromWikidata -- setup table for values with property number as key
			local showb = true
			if (show[params.property] == nil) and (show[string.upper(params[1])] == nil ) then
				showb = showall -- if not specified then depends on showall
			elseif (show[params.property] == false) or (show[string.upper(params[1])] == false) then -- if either are false then id will be suppressed
				showb = false
			end
			if not showb then
				tval[params.property] = false -- indicates the identifier is suppressed
			elseif not addit then
				local val = parentArgs[mw.ustring.lower(params[1])] or parentArgs[params[1]]
				if val and val~= '' then -- add local parameter to list if not already in
					localparams = true
					local bnew = true
					for _, w in pairs(tval[params.property]) do
						if val == w.id then
							bnew = false
						end
					end
					if bnew then -- add new value to table
						if qid then
							qslink = qslink .. '%7C%7C' .. qid .. '%7CP' .. params.property .. '%7C%22' .. mw.uri.encode .. '%22%7CS143%7CQ328'
						end
						table.insert
					end
				end
			end
			local suppress = false
			if params.suppressedbyproperty then
				for _,sc in ipairs(params.suppressedbyproperty) do
					if parameter_is_used(sc) then
						suppress = true
					end
				end
			end
			if tval[params.property] ~= false and not suppress then
				local tlinks = {} -- setup table for links
				local nextIdVal = 1
				local row = ''
				for _,val in ipairs(tval[params.property]) do
					local link = _makelink
					row = row .. link
					table.insert
					nextIdVal = nextIdVal + 1
				end
				if nextIdVal>=2 then
					row = row .. '\n'
					table.insert
					rct = true
				end
			end
		end
	end
	local function pencil(qid)
		if not qid then
			return ''
		end
		local args = { pid = 'identifiers' } -- #target the list of identifiers
		args.qid = qid
		return require('Module:EditAtWikidata')._showMessage(args)
	end

	makeSections
	for c = 1,#qids do
		makeSections
	end

	--configure Navbox
	local outString = ''
	if rct or localparams then -- there is at least one link to display
		local Navbox = require('Module:Navbox')
		local sect,lastsect = 0,0
		local navboxArgs = {
			name = 'Authority control',
			navboxclass = 'authority-control',
			bodyclass = 'hlist',
			state = parentArgs.state or config.i18n.autocollapse,
			navbar = 'off'
		for c=1,numsections+#qids do
			if #sections[c] ~= 0 then -- section is non-empty
				sect = sect + 1
				lastsect = c
				local sectname
				if c <= numsections then -- regular section
					sectname = config.sections[c].name
				else -- section from additional qid
					local qid = qids[c-numsections]
					local label,sitelink = mw.wikibase.getLabel(qid), mw.wikibase.getSitelink(qid)
					if label then
						if sitelink then -- make wikilink to article
							sectname = '' .. label .. ''
						else
							sectname = label
						end
					else
						sectname = qid
						auxCats = auxCats .. needsAttention('L')
					end
					sectname = sectname .. pencil(qid)
				end
				navboxArgs['group' .. c] = sectname
				navboxArgs['list' .. c] = table.concat(sections[c])
			end
		end
		if localparams then
			lastsect = lastsect + 1
			sect = sect + 1
			navboxArgs['group' .. lastsect] = config.i18n.warning
			local warning = frame:expandTemplate{title = config.i18n.errortemplate, args = {config.i18n.localparams}}
			if qslink ~= '' then
				warning = warning .. ' ' .. config.i18n.movetowd .. ''
			elseif not qid then
				if namespace == 0 then
					warning = warning .. ' ' .. config.i18n.connecttowd
				elseif namespace==14 or namespace==2 or namespace==118 then
					warning = warning .. ' ' .. config.i18n.qidcode
				end
			end
			navboxArgs['list' .. lastsect] = warning
		end
		if topic then -- display in expanded form with topic
			navboxArgs.title = config.i18n.aclink .. ' &ndash; ' .. topic .. pencil(qid)
		elseif sect == 1 then -- special display when only one section
			if lastsect <= numsections then
				if config.sections[lastsect].hidelabelwhenalone then -- no special label when only general or other IDs are present
					navboxArgs['group' .. lastsect] = config.i18n.aclink .. pencil(qid)
				else -- other regular section
					navboxArgs['group' .. lastsect] = config.i18n.aclink .. ': ' .. navboxArgs['group' .. lastsect] .. pencil(qid)
				end
			else -- section from additional qid
				navboxArgs['group' .. lastsect] = config.i18n.aclink .. ': ' .. navboxArgs['group' .. lastsect]
			end
		else -- add title to navbox
			navboxArgs.title = config.i18n.aclink .. pencil(qid)
		end
		outString = Navbox._navbox(navboxArgs)
	end

	if parentArgs.state then
		if (parentArgs.state ~= config.i18n.collapsed) and (parentArgs.state ~= config.i18n.expanded) and (parentArgs.state ~= config.i18n.autocollapse) then --invalid state parameter
			auxCats = auxCats .. needsAttention('S')
		end
	end
	if testcases then
		auxCats = mw.ustring.gsub(auxCats, '(%[%[)(' .. config.i18n.category .. ')', '%1:%2') --for easier checking
	end

	--out
	outString = outString..auxCats
	if namespace ~= 0 then
		outString = mw.ustring.gsub(outString,'(%[%[)(' .. config.i18n.category .. ':.* ' .. config.i18n.Articles .. ')([^%|%]]+)%|?[^%|%]]*(%]%])','%1:%2%3%4')
		-- config.i18n.All_articles 미사용
	end
	local check = require('Module:Check for unknown parameters')._check
	local sortkey
	if namespace == 0 then
		sortkey = '*' .. title.text
	else
		sortkey = title.fullText
	end
	outString = outString .. check({
		['unknown'] = '' .. sortkey .. '',
		['preview'] = config.i18n.previewwarning, 'show', 'country', 'suppress', 'additional', 'qid', 'state'
	return outString
end

p.makelink = function
	return _makelink
end