local p = {}
local getArgs = require('Module:Arguments').getArgs
local yesno = require('Module:Yesno')
local rawData = mw.loadData('Module:Sanctions/data/sandbox')
local data = rawData.sanctions
local commData = rawData.comm
local arbcomData = rawData.arbcom

local messageBox = require('Module:Message box')

-- Functions

local function tableContainsValue(needle, haystack)
	for _, v in pairs(haystack) do
		if v == needle then
			return true
		end
	end
	return false
end

local function _getTopicData(topicAlias)
	if data[topicAlias] then
		return data[topicAlias]
	else
		return false
	end
end

-- Returns an invalid topic error, with a table of acceptable topics
local function syntaxHelp(frame)
	return '<span class="error">{{para|topic}} not specified. Available options:</span><div style="border-left: 5px dashed black; border-right: 5px dashed black; border-bottom: 5px dashed black; padding-left: 0.5em; padding-right: 0.5em; padding-bottom: 0.5em;">' .. p.table(frame) .. '</div>'
end

-- Topic class

local Topic = {}
Topic.__index = Topic

function Topic.new(topicCode, args)
	local obj = {}
	obj._args = args
	obj._topicData = _getTopicData(topicCode)
	
	return setmetatable(obj, Topic)
end

function Topic:get(arg)
	return self._topicData[arg]
end

function Topic:exists()
	return self._topicData and true
end

function Topic:hasGlobalRestriction(type)
	return self._topicData.restrictions[type]
end

function Topic:hasLocalRestriction(type)
	return yesno(self._args[type]) or false
end

function Topic:hasRestriction(type)
	return self:hasGlobalRestriction(type) or self:hasLocalRestriction(type)
end

function Topic:hasRestrictions(arr)
	for _, v in ipairs(arr) do
		if self:hasRestriction(v) then
			return true
		end
	end
	
	return false
end

function Topic:hasAnyRevertRestrictions()
	return self:hasRestrictions({'1rr', '0rr', 'consensusrequired', 'brd', 'protection'})
end

function Topic:hasAnyRestrictions()
	return self:hasAnyRevertRestrictions() or self:hasRestrictions({'restriction1'})
end

function Topic:getType()
	return (self:get('type') == 'arbcom' and '[[WP:ARBCOM|Arbitration Committee]]' or (self:get('type') == "both" and '[[WP:ARBCOM|Arbitration Committee]] and community' or 'community'))
end

function Topic:getTypeUnlinked()
	return (self:get('type') == 'arbcom' and 'arbitration' or (self:get('type') == "both" and 'arbitration and community' or 'community'))
end

function Topic:getCustomRestrictions()
	local customRestrictions = {}
	local ri = 1
	local checkArr = self._topicData.restrictions
	local breakNext = false
	while true do
		if checkArr['restriction'..ri] then
			table.insert(customRestrictions, checkArr['restriction'..ri])
			ri = ri + 1
		elseif breakNext then
			break
		else
			ri = 1
			checkArr = self._args
			breakNext = true
		end
	end
	
	return customRestrictions
end

-- End classes

local function formatRestrictions(topic, you, article)
	local restrictionList = mw.html.create('ul')
	if (you) then
		if topic:hasRestriction('1rr') then
			restrictionList:tag('li'):wikitext('You are not allowed to make more than 1 revert within 24 hours on a page within this topic, subject to the [[WP:NOT3RR|usual exemptions]].')
		end
		if topic:hasRestriction('0rr') then
			restrictionList
				:tag('li')
					:wikitext("You are not allowed to make any reverts within this topic, subject to the [[WP:NOT3RR|usual exemptions]].")
		end
		if topic:hasRestriction('protection') then
			local protectionRestriction = ''
			local shortCode = topic:get('restrictions')['protection']
			if shortCode == "ecp" then
				protectionRestriction = "logged in, have made 500 edits, and an account age of 30 days"
			elseif shortCode == "semi" then
				protectionRestriction = "logged in, have made 10 edits, and an account age of 4 days"
			elseif shortCode == "user" then
				protectionRestriction = "logged in"
			end
			restrictionList:tag('li'):wikitext('You must be ' .. protectionRestriction .. '.')
		end
		
		local customRestrictions = topic:getCustomRestrictions()
		for _, v in ipairs(customRestrictions) do
			restrictionList
				:tag('li')
					:wikitext(v)
		end
	else
		-- 1RR
		if topic:hasRestriction('1rr') then
			restrictionList
				:tag('li')
					:wikitext("'''Limit of one revert in 24 hours:''' This " .. (article and " article " or " topic ") .. " is under [[Wikipedia:Edit warring#Other revert rules|WP:1RR]] (one [[Wikipedia:Reverting|revert]] per editor per article ''per 24-hour period'').")
		end
		
		-- 0RR
		if topic:hasRestriction('0rr') then
			restrictionList
				:tag('li')
					:wikitext("'''Reverts prohibited:''' This " .. (article and " article " or " topic ") .. " is under [[Wikipedia:Edit warring#Other revert rules|WP:0RR]] (no reverts permitted).")
		end
		
		if topic:hasRestriction('protection') then
			local protectionRestriction = ''
			local shortCode = topic:get('restrictions')['protection']
			if shortCode == "ecp" then
				protectionRestriction = "'''Extended confirmed requirement:''' Editors must be logged in, [[WP:ECP|have made 500 edits, and an account age of 30 days]]"
			elseif shortCode == "semi" then
				protectionRestriction = "'''Auto confirmed requirement:''' Editors must be logged in, [[WP:SEMI|have made 10 edits, and an account age of 4 days]]"
			elseif shortCode == "user" then
				protectionRestriction = "'''Logged in requirement:''' Editors must be logged in"
			end
			restrictionList
				:tag('li'):wikitext(protectionRestriction .. " in order to make edits " .. (article and " to this article" or " within this topic area") .. ".")
		end
		-- Text for boilerplate/predefined restrictions
		if topic:hasRestriction('consensusrequired') then
			restrictionList
				:tag('li')
					:wikitext("'''Consensus required:''' All editors must obtain [[WP:Consensus|consensus]] on the talk page of " .. (article and "this article" or "articles within this topic") .. " before reinstating ''any edits that have been challenged (via reversion).'' This includes making edits similar to the ones that have been challenged. If in doubt, do not make the edit.")
		end
	
		if topic:hasRestriction('brd') then
			restrictionList
				:tag('li')
					:wikitext("'''24-hr [[Wikipedia:BOLD, revert, discuss cycle|BRD cycle]]:''' If a change you make to " .. (article and "this article" or "an article within this topic") .." is reverted, you may not reinstate that change unless you discuss the issue on the talk page and wait 24 hours (from the time of the original edit). Partial reverts/reinstatements that reasonably address objections of other editors [[Wikipedia:BOLD, revert, discuss cycle#WP:BRR|are preferable]] to wholesale reverts.")
		end
		
		local customRestrictions = topic:getCustomRestrictions()
		for _, v in ipairs(customRestrictions) do
			restrictionList
				:tag('li')
					:wikitext(v)
		end
	end
	return restrictionList
end
-- This function builds a talk notice
-- TODO: split this up
--
-- @param frame
-- @param topic topic class instance
-- @param args arguments passed to wrapper template
-- @returns String representation of notice
local function buildTalkNotice(frame, topic, args)
	local type = args['type'] or args[2] or 'mini'
	local out = mw.html.create('')
	local hasRestrictions = topic:hasAnyRestrictions()
	local hasRevertRestrictions = topic:hasAnyRevertRestrictions()
	
	if hasRestrictions then
		type = 'long' -- force long displaywhere custom restrictions are applicable

		out
			:tag('span')
				:css('font-size', '120%')
				:wikitext("'''WARNING: ACTIVE " .. string.upper(topic:getTypeUnlinked()) ..  " SANCTIONS'''")
	end

	if hasRestrictions then
		out
			:tag('p')
				:wikitext("The article [[:{{SUBJECTPAGENAME}}]], along with other pages relating to "..topic:get('scope')..", is designated by the " .. topic:getType() .. " as a '''[[Wikipedia:Contentious topics|contentious topic]]'''. The current restrictions are:")
	else
		out
			:tag('p')
				:wikitext("<strong>The use of the [[Wikipedia:Contentious topics|contentious topics procedure]] has been authorized by the " .. topic:getType() .. " for pages related to ".. topic:get('scope') ..", including this page.</strong>" .. (type == 'mini' and ' Editors who repeatedly or seriously fail to adhere to the [[Wikipedia:Five pillars|purpose of Wikipedia]], any expected [[Wikipedia:Etiquette|standards of behaviour]], or any [[Wikipedia:List of policies|normal editorial process]] may be sanctioned.' or ''))
	end

	if type ~= 'mini' then
		local restrictionList = formatRestrictions(topic, false, true)
		
		if hasRestrictions then
			out:node(restrictionList)
		end

		out
			:tag('p')
				:wikitext("Editors who repeatedly or seriously fail to adhere to the [[Wikipedia:Five pillars|purpose of Wikipedia]], any expected [[Wikipedia:Etiquette|standards of behaviour]], or any [[Wikipedia:List of policies|normal editorial process]] may be sanctioned.")
			
		-- Further info box
		if hasRestrictions then
			local furtherInfo = mw.html.create('')

			-- Enforcement procedures
			furtherInfo
				:tag('p')
					:wikitext('Enforcement procedures:')
					:done()

			local enforcementProcedures = mw.html.create('ul')

			if hasRestrictions then
				enforcementProcedures
					:tag('li')
						:wikitext("Violations of any restrictions " .. (hasRevertRestrictions and "(excluding 1RR/reverting violations) " or "") .. "and other conduct issues should be reported to the " .. (topic:get('type') == "arbcom" and "[[WP:AE|arbitration enforcement noticeboard]]" or "[[WP:ANI|administrators' incidents noticeboard]]") .. "." .. (hasRevertRestrictions and " Violations of revert restrictions should be reported to the [[Wikipedia:Administrators' noticeboard/Edit warring|administrators' edit warring noticeboard]]." or ""))
						:done()
					:tag('li')
						:wikitext("Editors who violate any listed restrictions may be blocked by any uninvolved administrator, even on a first offense.")
						:done()
			else
				enforcementProcedures
					:tag('li')
						:wikitext("Problems should be reported to the " .. (topic:get('type') == "arbcom" and "[[WP:AE|arbitration enforcement noticeboard]]" or "[[WP:ANI|administrators' incidents noticeboard]]") .. ".")
						:done()
			end

			enforcementProcedures
				:tag('li')
					:wikitext("An editor must be [[Wikipedia:Contentious topics#Awareness of contentious topics|aware]] before they can be sanctioned.")
					:allDone()
			furtherInfo:node(enforcementProcedures)

			if hasRevertRestrictions then
				furtherInfo
					:tag('p')
						:wikitext("With respect to any reverting restrictions:")
						:done()
					:tag('ul')
						:tag('li')
							:wikitext("Edits made solely to enforce any clearly established consensus are exempt from all edit-warring restrictions. In order to be considered \"clearly established\" the consensus must be proven by prior talk-page discussion.")
							:done()
						:tag('li')
							:wikitext("Edits made which remove or otherwise change any material placed by clearly established consensus, without first obtaining consensus to do so, may be treated in the same manner as clear vandalism.")
							:done()
						:tag('li')
							:wikitext("Clear vandalism of any origin may be reverted without restriction.")
							:done()
						:tag('li')
							:wikitext("Reverts of edits made by anonymous (IP) editors that are not vandalism are exempt from the 1RR but are subject to [[Wikipedia:Edit warring|the usual rules on edit warring]]. If you are in doubt, contact an administrator for assistance.")
							:allDone()
					:tag('p')
						:wikitext("If you are unsure if your edit is appropriate, discuss it here on this talk page first. <strong>Remember: When in doubt, don't revert!</strong>")
			end

			local collapsed = frame:expandTemplate{ title = 'collapse', args = {
				tostring(furtherInfo),
				'<span style="color:red">Remedy instructions and exemptions</span>',
				['bg'] = '#EEE8AA'
			}}
			
			out
				:newline()
				:node(collapsed)
		end
		-- End further info box
	end

	local box = messageBox.main( 'tmbox', {
		type = 'notice',
		image = type == 'long' and '[[File:Commons-emblem-issue.svg|50px]]' or '[[File:Commons-emblem-hand-orange.svg|40px]]',
		text = frame:preprocess(tostring(out))
    })

    return box
end

-- Builds an intro alert notice
--
-- @param frame
-- @param topic topic class instance
-- @returns String representation of notice
local function buildFirstAlert(frame, topic, sig)
	local out = mw.html.create('table')
		:addClass('gs-alert')
		:cssText("border: 1px solid #AAA; background-color: #E5F8FF; padding: 0.5em; width: 100%; margin-bottom: 1em")

	local insideNode = out
		:tag('tr')
			:tag('td')
				:cssText("vertical-align:middle; padding-left:1px; padding-right:0.5em;")
				:wikitext("[[File:Commons-emblem-notice.svg|50px]]")
				:done()
			:tag('td')
	
	insideNode
		:tag('p'):wikitext("You have recently edited a page related to <b>" .. topic:get('scope') .. "</b>, a topic designated as [[WP:CTOP|contentious]] by the " .. topic:getType() .. "."):done()
		:tag('p'):wikitext("A special set of rules applies to certain topic areas, which are referred to as <i>contentious topics</i>. These are specially designated topics that have been identified by the community or the Arbitration Committee to attract more persistent disruptive editing than the rest of the project. When editing a contentious topic, Wikipedia’s norms and policies are more strictly enforced, and Wikipedia administrators have special powers in order to reduce disruption to the project."):done()
		:tag('p'):wikitext("Within contentious topics, editors should edit <strong>carefully</strong> and <strong>constructively</strong>, refrain from disrupting the encyclopedia, and:"):done()
		:tag('ul')
			:tag('li'):wikitext('adhere to the [[WP:NOT|purposes of Wikipedia]];'):done()
			:tag('li'):wikitext('comply with all applicable [[Wikipedia:Policies and guidelines|policies and guidelines]];'):done()
			:tag('li'):wikitext('follow editorial and behavioural best practice;'):done()
			:tag('li'):wikitext('comply with any page restrictions in force within the area of conflict; and'):done()
			:tag('li'):wikitext('refrain from [[WP:GAME|gaming the system]].'):done()
			:done()
	if (topic:hasAnyRestrictions()) then
		insideNode
			:tag('p'):wikitext("Additionally, you must comply with the following restrictions:")
		local restrictionList = formatRestrictions(topic, true, false)
		insideNode:wikitext(tostring(restrictionList)):done()
	end
	insideNode
		:tag('p'):wikitext("Editors are advised to err on the side of caution if unsure whether making a particular edit is consistent with these expectations. If you have any questions about contentious topics ''procedures'' you may ask them at the [[WT:AC/C|arbitration clerks' noticeboard]] or you may learn more about this contentious topic at [[" .. topic:get('wikilink') .. "]]. You may also choose to note which contentious topics you know about by using the {{tl|ct/aware}} template."):done()
	return frame:preprocess('== Introduction to contentious topics ==\n' .. tostring(out) .. ' <!-- Derived from Template:Contentious topics/alert --> ')
end

-- Builds an alert notice
--
-- @param frame
-- @param topic topic class instance
-- @returns String representation of notice
local function buildAlert(frame, topic, sig)
	local out = ''
	out = out .. '[[File:Commons-emblem-notice.svg|link=|25px|alt=Information icon]] You have recently made edits related to ' .. topic:get('scope') .. '. This is a standard message to inform you that ' .. topic:get('scope') .. ' is a' .. (topic:get('type') == "comm" and ' community' or 'n Arbitration Committee' .. (topic:get('type') == "both" and ' and community' or '')) .. ' designated contentious topic. This message <em>does <strong>not</strong> imply that there are any issues with your editing</em>. '
	if (topic:hasAnyRestrictions()) then
		out = out .. "You must comply with the following restrictions within this topic area:"
		local restrictionList = formatRestrictions(topic, true, false)
		out = out .. tostring(restrictionList) .. '\n\n'
	end
	out = out .. 'For more information about the contentious topics system, please see [[Wikipedia:Contentious topics]].'
	return frame:preprocess(tostring(out) .. ' <!-- Derived from Template:Contentious topics/alert --> ')
end

-- Builds an edit notice
local function buildEditNotice(frame, topic, args)
	local enHeader = 'This page relates to '.. topic:get('scope') .. ', which has been designated by the ' .. topic:getType() .. ' as a [[WP:CTOP|contentious topic]].'
	local enText = mw.html.create('')
	enText:tag('p'):wikitext('While editing this topic, you must adhere to the [[WP:Five pillars|purpose of Wikipedia]], [[WP:Etiquette|expected standards of behaviour]], and [[WP:List of policies|Wikipedia\'s policies and norms]].'):done()
	if topic:hasAnyRestrictions() then
		local list = formatRestrictions(topic, true, true)
		enText:tag('p'):wikitext("In addition, while editing, you must follow these restrictions: "):done()
		enText:wikitext(tostring(list))
	end

	enText
		:tag('p')
			:wikitext("<strong>Failure to do so may result in a block or other sanctions.</strong> Please edit carefully.")
			:done()

	local editnotice = frame:expandTemplate{ title = 'editnotice', args = {
		expiry = "indefinite",
		headerstyle = "font-size: 120%;",
		style = "background: ivory;",
		image = "Commons-emblem-issue.svg",
		imagesize = "50px",
		header = tostring(enHeader),
		text = tostring(enText)
	}}

	return editnotice
end

local function buildAwarenessNotice(frame, topics, args)
	local out = 'This user is aware of the designation of the following topics as [[WP:CTOP|contentious topics]]:\n'
	for k,v in pairs(topics) do
		out = out .. '* ' .. v:get('scope') .. '\n'
	end
	out = out .. "They '''should ''not'' be given alerts''' for those areas."
	return messageBox.main( 'mbox', {
		type = 'notice',
		image = '[[File:Commons-emblem-notice.svg|40px]]',
		text = frame:preprocess(out)
    })
end

-- Builds a sanction alert notice
--
-- @param frame
-- @param topic topic class instance
-- @returns String representation of notice
local function buildSanctionAlert(frame, type, topic, sanction, rationale, decision, sig)
	local out = mw.html.create('table')
		:addClass('gs-alert')
		:cssText("margin-bottom: 1em; border: 1px solid #AAA; background-color: ivory; padding: 0.5em; display: flex; align-items: center;")

	local insideNode = out
		:tag('tr')
			:tag('td')
				:cssText("vertical-align:middle; padding-left:1px; padding-right:0.5em;")
				:wikitext("[[File:Commons-emblem-hand.svg|50px]]")
				:done()
			:tag('td')
	
	insideNode
		:tag('p'):wikitext("The following sanction has been applied to you: "):done()
		:wikitext(frame:expandTemplate{title = "talkquote", args = {["1"] = (((sanction == "ban" and topic ~= nil) and "You have been banned from making edits related to " .. topic:get('scope') ..  ", broadly construed." or sanction) or "<span class=\"error\">no sanction given</span>")}})
		:tag('p'):wikitext("You have been sanctioned " .. (rationale or "<span class=\"error\">no reason given</span>")):done()
		:tag('p'):wikitext("This sanction is imposed in my capacity as an [[WP:UNINVOLVED|uninvolved administrator]] under the authority of " .. (type == "comm" and "the community" or "the [[WP:ARBCOM|arbitration committee]]" .. (type == "both" and " and the community" or "")) .. " at " .. (topic ~= nil and "[[" .. topic:get("wikilink") .. "]]" or (decision or "<span class=\"error\">no decision link provided</span>")) .. (topic ~= nil and ", and the [[WP:CTOP|contentious topics procedure]]." or ".") .. " This sanction has been recorded in the log of sanctions for that topic. If the sanction includes a ban, please read the [[Wikipedia:Banning policy|banning policy]] to ensure you understand what this means. If you do not comply with this sanction, you may be [[Wikipedia:Blocking policy|blocked]] for an extended period, by way of enforcement of this sanction—and you may also be made subject to further sanctions."):done()
		:tag('p'):wikitext("You may appeal this sanction by " .. (topic ~= nil and "[[Wikipedia:Contentious topics#Appeals and Amendments|following the instructions here]]" or "[[WP:UNBAN|following the instructions here]]") .. ". Even if you appeal this sanction, you remain bound by it until you are notified by an uninvolved administrator that the appeal has been successful. You are also free to contact me on my talk page if anything of the above is unclear to you."):done()
	return frame:preprocess('== You have been sanctioned ==\n' .. tostring(out) .. '\n <!-- Template:Ct/sanction -->')
end

local function listToText(frame, t)
	local new = {}
	local t = require('Module:TableTools').compressSparseArray(t)
	for i,v in ipairs(t) do
		table.insert(new, frame:expandTemplate{title = 'Contentious_topics/list', args = {["scope"] = v}})
	end
	return '\n*'..table.concat(new, '\n*')
end

--/////////--
-- EXPORTS
--/////////--

function p.detect(frame)
	local title
	local args = getArgs(frame)
	if args.testTitle then
		title = mw.title.new(args.testTitle)
	else
		title = mw.title.getCurrentTitle()
	end
	local content = title:getContent() or ''
	local codes = string.match(content, "{{%s-[cC]ontentious [tT]opics/[aA]ware%s-|([^}]-)}}")
	local shortcutCodes = string.match(content, "{{%s-[cC][tT]/[aA]ware%s-|([^}]-)}}")
	local dsCodes = string.match(content, "{{%s-D[sS]/[aA]ware%s-|([^}]-)}}")
	if (not codes) and (not dsCodes) and (not shortcutCodes) then return end
	local text
	if ( codes ) then
		text = listToText(frame, mw.text.split(codes, "|"))
	elseif ( dsCodes ) then
		text = listToText(frame, mw.text.split(dsCodes, "|"))
	else
		text = listToText(frame, mw.text.split(shortcutCodes, "|"))
	end
	return frame:preprocess(
		"<div style = 'font-weight: bold'>It is not necessary to notify this user about the following topics being contentious topics:"
		..text..
		"\n The user has indicated that they are already aware using the template <nowiki>{{Contentious topics/aware}}</nowiki> on their talk page.</div>"
	)
end

-- Returns awareness notice
function p.awarenessNotice(frame)
	local args = getArgs(frame)

	local topics = {}
	for k,v in ipairs(args) do
		topics[k] = Topic.new(v, args)
		if not topics[k]:exists() then
			return frame:preprocess('<strong class="error">Invalid topic specified at argument ' .. k .. '</strong>. \n' .. p.table(frame))
		end
	end
	
	return buildAwarenessNotice(frame, topics, args)
end

-- Returns a talk notice
-- For documentation, see [[Template:Gs/talk notice]]
function p.talknotice(frame)
	local args = getArgs(frame)

	local topic = Topic.new(args['topic'] or args[1], args)

	if not topic:exists() then
		return frame:preprocess(syntaxHelp(frame))
	end
	
	return buildTalkNotice(frame, topic, args)
end

-- Returns an alert
-- For documentation, see [[Template:Gs/alert]]
function p.alert(frame)
	local args = getArgs(frame)

	local topic = Topic.new(args['topic'] or args[1], args)
	if not topic:exists() then
		return frame:preprocess(syntaxHelp(frame))
	elseif not topic:hasRestriction('ds') then
		return frame:preprocess('<span class="error">This topic area is not designated as a contentious topic. Alert is not required.</span>')
	end
	
	return buildAlert(frame, topic, args['sig'])
end

function p.alertFirst(frame)
	local args = getArgs(frame)

	local topic = Topic.new(args['topic'] or args[1], args)
	if not topic:exists() then
		return frame:preprocess(syntaxHelp(frame))
	elseif not topic:hasRestriction('ds') then
		return frame:preprocess('<span class="error">This topic area is not designated as a contentious topic. Alert is not required.</span>')
	end
	
	return buildFirstAlert(frame, topic, args['sig'])
end

function p.sanction(frame)
	local args = getArgs(frame)

	local topic = Topic.new(args['topic'] or args[1], args)
	return buildSanctionAlert(frame, (topic:exists() and topic:get('type') or args['type']), (topic:exists() and topic or nil), args['sanction'], args['rationale'], args['decision'], args['sig'])
end

-- Returns an edit notice
-- For documentation, see [[Template:Gs/editnotice]]
function p.editnotice(frame)
	local args = getArgs(frame)

	local topic = Topic.new(args['topic'] or args[1], args)
	if not topic:exists() then
		return frame:preprocess(syntaxHelp(frame))
	end

	return buildEditNotice(frame, topic, args)
end

function p.generatePage(frame)
	local args = getArgs(frame)
	local topic = Topic.new(args['topic'], args)
	local out = mw.html.create('')
	out:wikitext(messageBox.main( 'ombox', {
		type = 'notice',
		image = '[[File:Unbalanced scales.svg|50x40px|link=]]',
		text = 'This page documents and supplements decisions concerning a [[WP:CTOP|contentious topic]].'
    })):done()
    if (yesno(args['rescinded']) or false) then
    	out:tag('p'):wikitext('This topic previously had enacted remedies that applied to all editors who made edits to this topic area ("the Contentious Topic"). They have since been removed as a contentious topic.'):allDone()
    	return tostring(out)
    else
    	if not topic:exists() then error("Topic does not exist, use rescinded parameter for former contentious topics") end
    	out:tag('p'):wikitext('The ' .. topic:getType() .. ' has [[' .. topic:get("decision") .. '|enacted remedies]] that apply to all editors who make edits related to <b>' .. topic:get("scope") .. '</b> ("the Contentious Topic"). The [[WP:CTOP|contentious topic procedure]] applies to all pages and edits related to this topic.' ):done()
    end
    out:tag('h2'):wikitext("Decisions"):done()
    out:wikitext((args['decisions'] or '')):done()
    out:tag('h2'):wikitext("Guidance for administrators"):allDone()
    out:wikitext((args['guidance'] or '')):done()
    out:tag('h2'):wikitext("Standard set of restrictions"):allDone()
    out:tag("p"):wikitext("Any uninvolved administrator may impose the following set of restrictions for up to one year: "):allDone()
    out:tag('ul')
    	:tag("li"):wikitext("Individual restrictions")
    		:tag("ul")
    			:tag("li"):wikitext("sitewide and partial blocks"):done()
    			:tag("li"):wikitext("topic bans and page bans (from the entire contentious topic, a subtopic, or specified pages within the topic),"):done()
    			:tag("li"):wikitext("interaction bans,"):done()
    			:tag("li"):wikitext("revert restrictions"):done()
    			:done()
    		:done()
    	:tag("li"):wikitext("Page restrictions")
    		:tag("ul")
    			:tag("li"):wikitext("page protection,"):done()
    			:tag("li"):wikitext("revert restrictions,"):done()
    			:tag("li"):wikitext('the "[[Wikipedia:Contentious topics#cite note-3|consensus required]]" restriction,'):done()
    			:tag("li"):wikitext('the "[[Wikipedia:Contentious topics#cite note-4|enforced BRD]]" restriction'):done()
    			:done()
    		:done()
    	:allDone()
	local restrictionList = formatRestrictions(topic, false, false)
	local hasRestrictions = topic:hasAnyRestrictions()
	local hasRevertRestrictions = topic:hasAnyRevertRestrictions()
	
	if hasRestrictions then
		out:tag("p"):wikitext("The following restrictions apply to the whole topic area: "):done()
		out:node(restrictionList)
	end
    out:tag('h2'):wikitext("Templates"):allDone()
    out:tag("p"):wikitext("When alerting an editor who has never received an alert for any contentious topic, the following template <b>must</b> be used to alert them: " .. frame:preprocess("{{tlx|Contentious topics/alert/first|" .. args['topic'] .. "}}" )):done()
    out:tag("p"):wikitext("In addition, the following <b>must</b> be used as an editnotice: " .. frame:preprocess("{{tlx|Contentious topics/editnotice|" .. args['topic'] .. "}}" )):done()
    out:tag("p"):wikitext("And the following <b>must</b> be used as a talk notice: " .. frame:preprocess("{{tlx|Contentious topics/talk notice|" .. args['topic'] .. "}}" )):done()
    
    return tostring(out)
end

function p.table(frame)
	local args = getArgs(frame)
	local type = args['type']
	local tbl = mw.html.create('table')
		:addClass('wikitable'):addClass('sortable')
		:css('font-size', '9pt')
		:css('background', 'transparent')
	if (type ~= "comm" and type ~= "arbcom" and type ~= nil) then
		return '<span class="error">Invalid sanction type specified.</span>'
	end
	local topRow = tbl:tag('tr')
	-- Headers
	topRow:tag('th')
		:wikitext("Topic code")
		:done()
	topRow:tag('th')
		:wikitext("Area of conflict")
		:done()
	if (type ~= "comm" and type ~= "arbcom") then
		topRow:tag('th')
			:wikitext("Designated by")
			:done()
	end
	topRow:tag('th')
		:wikitext("Relevant information")
		:done()
	topRow:tag('th')
		:wikitext("Relevant decision")
		:allDone()
	
	-- sort alphabetically
	local sortedTable = {}
	if type == "comm" then
		for n in pairs(commData) do
			table.insert(sortedTable, n)
		end
	elseif type == "arbcom" then
		for n in pairs(arbcomData) do
			table.insert(sortedTable, n)
		end
	else
		for n in pairs(data) do
			table.insert(sortedTable, n)
		end
	end
	table.sort(sortedTable)

	local added = {}
	for _,v in ipairs(sortedTable) do
		local sanction = data[v]
		local wt = (function(sanction, v)
			for l,w in ipairs(sanction.aliases or {}) do
				if (w == v) then return nil end
			end
			local out = "<code>" .. v .. "</code>"
			for l,w in ipairs(sanction.aliases or {}) do
				if (not added[w]) then
					out = out .. ' ' .. "<code>" .. w .. "</code>"
					added[w] = true
				end
			end
			return out
		end)(sanction, v)
		if wt ~= nil then
			if (not added[v]) then
				tbl:tag('tr')
					:tag('td')
						:wikitext(wt)
						:done()
					:tag('td')
						:wikitext(sanction.scope)
						:done()
					:tag('td')
						:wikitext(sanction.type == "comm" and "the community" or "the Arbitration Committee" .. (sanction.type == "both" and " and the community" or ""))
						:done()
					:tag('td')
						:wikitext("[[".. sanction.wikilink .."]]")
						:done()
					:tag('td')
						:wikitext((sanction.decision ~= nil and "[[".. sanction.decision .. "|decision]]" or ""))
						:allDone()
			added[v] = true
			end
		end
	end

	return tostring(tbl)
end

function p.topicsHelper(frame)
	local args = getArgs(frame)

	if args['sanctions scope'] and data[args['sanctions scope']] then
		return _getTopicData(args['sanctions scope']).scope
	elseif args['sanctions link'] and data[args['sanctions link']] then
		return mw.title.new(_getTopicData(args['sanctions link']).wikilink).redirectTarget
	else
		return "" -- ?
	end
end

-- Returns true if the given topic name is a valid topic area
function p.checkIfValidTopic(topicName)
	local topic = Topic.new(topicName, nil)
	return topic:exists()
end

-- for debugging
p._Topic = Topic

return p