local yesno, makeMessageBox -- passed in from Module:Protected edit request
local makeToolbar = require('Module:Toolbar')._main
local getPagetype = require('Module:Pagetype')._main
local effectiveProtectionLevel = require('Module:Effective protection level')._main

-- Helper functions

local function makeWikilink
	if display then
		return mw.ustring.format
	else
		return mw.ustring.format
	end
end

-- Title class

-- This is basically the mw.title class with some extras thrown in.

local title = {}
title.__index = title

function title.getProtectionLevelText(protectionLevel)
	-- Gets the text to use in anchors and urn links.
	local levels = {unprotected = 'editunprotected', autoconfirmed = 'editsemiprotected', extendedconfirmed = 'editextendedprotected', templateeditor = 'edittemplateprotected', sysop = 'editprotected', interfaceadmin = 'editinterfaceprotected'}
	return levels[protectionLevel]
end

function title.new(...)
	local success, obj = pcall
	if not (success and obj) then return end

	-- Add a protectionLevel property.
	obj.protectionLevel = effectiveProtectionLevel
	if obj.protectionLevel == '*' then
		-- Make unprotected pages return "unprotected".
		obj.protectionLevel = 'unprotected'
	elseif obj.protectionLevel == 'user' then
		-- If we just need to be registered, pretend we need to be autoconfirmed, since it's the closest thing we have.
		obj.protectionLevel = 'autoconfirmed'
	end

	-- Add a pagetype property.
	obj.pagetype = getPagetype{page = obj.prefixedText, defaultns = 'all'}
	
	-- Add link-making methods.
	function obj:makeUrlLink
		return mw.ustring.format('[%s %s]', self:fullUrl(query), display)
	end

	function obj:makeViewLink(display)
		return self:makeUrlLink
	end

	function obj:makeEditLink(display)
		return self:makeUrlLink
	end

	function obj:makeHistoryLink(display)
		return self:makeUrlLink
	end

	function obj:makeLastEditLink(display)
		return self:makeUrlLink
	end

	function obj:makeWhatLinksHereLink(display)
		return makeWikilink
	end

	function obj:makeCompareLink
		display = display or 'diff'
		local comparePagesTitle = title.new('Special:ComparePages')
		return comparePagesTitle:makeUrlLink
	end

	function obj:makeLogLink
		local logTitle = title.new('Special:Log')
		return logTitle:makeUrlLink
	end

	function obj:urlEncode
		return mw.uri.encode
	end

	function obj:makeUrnLink(boxProtectionLevel)
		-- Outputs a urn link. The protection level is taken from the template, rather than detected from page itself,
		-- as the detection may be inaccurate for cascade-protected and title-blacklisted pages as of Nov 2013.
		local protectionLinkText = title.getProtectionLevelText(boxProtectionLevel)
		return mw.ustring.format
	end

	-- Get a subpage title object, but go through pcall rather than use the unprotected mw.title:subPageTitle.
	function obj:getSubpageTitle(subpage)
		return title.new(self.prefixedText .. '/' .. subpage)
	end
	
	return obj
end

-- TitleTable class

local titleTable = {}
titleTable.__index = titleTable

function titleTable.new(args)
	-- Get numerical arguments and make title objects for each of them. 
	local nums = {}
	for k, v in pairs(args) do
		if type(k) == 'number' then
			table.insert
		end
	end
	table.sort(nums)
	local titles = {}
	for _, num in ipairs(nums) do
		local title = title.new(args[num])
		table.insert
	end
	-- Get the current title, and get the subject title if no titles were specified.
	titles.currentTitle = mw.title.getCurrentTitle
	if #titles < 1 then
		local subjectNs = titles.currentTitle.subjectNsText
		if subjectNs ~= '' then
			subjectNs = subjectNs .. ':'
		end
		table.insert(titles, title.new(subjectNs .. titles.currentTitle.text))
	end
	-- Set the metatable.
	setmetatable
	return titles
end

function titleTable:memoize
	if self[memoField] ~= nil then
		return self[memoField]
	else
		self[memoField] = func(...)
		return self[memoField]
	end
end

function titleTable:titleIterator
	local i = 0
	local n = #self
	return function
		i = i + 1
		if i <= n then
			return self[i]
		end
	end
end

function titleTable:hasSameProperty
	-- If the titles table has more than one title in it, check if they have the same property.
	-- The property is found using the getPropertyFunc function, which takes a title object as its single argument.
	
	local function hasSameProperty(getPropertyFunc)
		local property
		for i, obj in ipairs(self) do
			if i == 1 then
				property = getPropertyFunc(obj)
			elseif getPropertyFunc(obj) ~= property then
				return false
			end
		end
		return true
	end

	return self:memoize
end	

function titleTable:hasSameExistenceStatus
	-- Returns true if all the titles exist, or if they all don't exist. Returns false if there is a mixture of existence statuses.
	return self:hasSameProperty('sameExistenceStatus', function (title) return title.exists end)
end

function titleTable:hasSameProtectionStatus
	-- Checks if all the titles have the same protection status (either for creation protection or for edit-protection - the two are not mixed).
	local sameExistenceStatus = self:hasSameExistenceStatus
	if sameExistenceStatus then
		return self:hasSameProperty('sameProtectionStatus', function (title) return title.protectionLevel end)
	else
		return sameExistenceStatus
	end
end

function titleTable:hasSamePagetype
	-- Checks if all the titles have the same pagetype.
	return self:hasSameProperty('samePagetype', function (title) return title.pagetype end)
end

function titleTable:propertyExists
	-- Checks if a title with a certain property exists.
	-- The property is found using the getPropertyFunc function, which takes a title object as its single argument
	-- and should return a boolean value.
	local function propertyExists(getPropertyFunc)
		for titleObj in self:titleIterator do
			if getPropertyFunc(titleObj) then
				return true
			end
		end
		return false
	end
	return self:memoize
end

function titleTable:hasNonInterfacePage
	return self:propertyExists('nonInterfacePage', function (titleObj) return titleObj.namespace ~= 8 end)
end

function titleTable:hasTemplateOrModule
	return self:propertyExists('templateOrModule', function (titleObj) return titleObj.namespace == 10 or titleObj.namespace == 828 end)
end

function titleTable:hasNonTemplateOrModule
	return self:propertyExists('nontemplateormodule', function (titleobj) return titleobj.namespace ~= 10 and titleobj.namespace ~= 828 end)
end

function titleTable:hasOtherProtectionLevel(level)
	for titleObj in self:titleIterator do
		if titleObj.protectionLevel ~= level then
			return true
		end
	end
	return false
end

function titleTable:getProtectionLevels
	local function getProtectionLevels
		local levels = {}
		for titleObj in self:titleIterator do
			local level = titleObj.protectionLevel
			levels[level] = true
		end
		return levels
	end
	return self:memoize
end

-- Blurb class definition

local blurb = {}
blurb.__index = blurb

function blurb.new
	local obj = {}
	obj.titles = titleTable
	obj.boxProtectionLevel = boxProtectionLevel
	obj.linkCount = 0 -- Counter for the number of total items in the object's link lists. 
	setmetatable
	return obj
end

-- Static methods --

function blurb.makeParaText
	local pipe = mw.text.nowiki('|')
	local equals = mw.text.nowiki('=')
	val = val and ("''" .. val .. "''") or ''
	return mw.ustring.format
end

function blurb.makeTemplateLink(s)
	return mw.ustring.format('%s%s%s', mw.text.nowiki(''))
end

function blurb:makeProtectionText
	local boxProtectionLevel = self.boxProtectionLevel
	local levels = {['*'] = 'unprotected', autoconfirmed = 'semi-protected', extendedconfirmed = 'extended-confirmed-protected', templateeditor = 'template-protected', sysop = 'fully protected', interfaceadmin = 'interface-protected'}
	for level, protectionText in pairs(levels) do
		if level == boxProtectionLevel then
			return mw.ustring.format
		end
	end
	error('알 수 없는 보호 수준: ' .. boxProtectionLevel)
end

function blurb.getPagetypePlural(title)
	local pagetype = title.pagetype
	if pagetype == 'category' then
		return 'categories'
	else
		return pagetype .. 's'
	end
end

-- Normal methods --

function blurb:makeLinkList(title)
	local tbargs = {} -- The argument list to pass to Module:Toolbar
	tbargs.style = 'font-size: smaller;'
	tbargs.separator = 'dot'
	-- Page links.
	table.insert(tbargs, title:makeEditLink('edit'))
	table.insert(tbargs, title:makeHistoryLink('history'))
	table.insert(tbargs, title:makeLastEditLink('last'))
	table.insert(tbargs, title:makeWhatLinksHereLink('links'))
	-- Sandbox links.
	local sandboxTitle = title:getSubpageTitle('연습장')
	if sandboxTitle and sandboxTitle.exists then
		table.insert(tbargs, sandboxTitle:makeViewLink('sandbox'))
		table.insert(tbargs, sandboxTitle:makeEditLink('edit sandbox'))
		table.insert(tbargs, sandboxTitle:makeHistoryLink('sandbox history'))
		table.insert(tbargs, sandboxTitle:makeLastEditLink('sandbox last edit'))
		table.insert(tbargs, title:makeCompareLink)
	end
	-- Test cases links.
	local testcasesTitle = title:getSubpageTitle('시험장')
	if testcasesTitle and testcasesTitle.exists then
		table.insert(tbargs, testcasesTitle:makeViewLink('test cases'))
	end
	-- Transclusion count link.
	if title.namespace == 10 or title.namespace == 828 then -- Only add the transclusion count link for templates and modules.
		local tclink = mw.uri.new{
			host = 'tools.wmflabs.org',
			path = '/templatecount/index.php',
			query = {
				lang = 'en',
				name = title.text,
				namespace = title.namespace,
			fragment = 'bottom'
		tclink = string.format('[%s transclusion count]', tostring(tclink))
		table.insert
	end
	-- Protection log link.
	if title.namespace ~= 8 then -- MediaWiki pages don't have protection log entries.
		table.insert(tbargs, title:makeLogLink)
	end
	self.linkCount = self.linkCount + #tbargs -- Keep track of the number of total links created by the object.
	return makeToolbar(tbargs)
end

function blurb:makeLinkLists
	local titles = self.titles
	if #titles == 1 then
		return self:makeLinkList(titles[1])
	else
		local ret = {}
		table.insert
		for i, titleObj in ipairs(titles) do
			table.insert(ret, mw.ustring.format('')
		return table.concat(ret)
	end
end

function blurb:makeIntro
	local titles = self.titles
	local requested = 'It is requested that'
	local protectionText
	if titles:hasNonInterfacePage then
		protectionText = ' ' .. self:makeProtectionText
	else
		protectionText = '' -- Interface pages cannot be unprotected, so we don't need to explicitly say they are protected.
	end
	-- Deal with cases where we are passed multiple titles.
	if #titles > 1 then
		local pagetype
		if titles:hasSamePagetype then
			pagetype = blurb.getPagetypePlural(titles[1])
		else
			pagetype = 'pages'
		end
		return mw.ustring.format
	end
	-- Deal with cases where we are passed only one title.
	local title = titles[1]
	local stringToFormat
	if title.exists then
		stringToFormat = '%s an edit be made to the%s %s at %s.'
	else
		stringToFormat = '%s the%s %s at %s be created.'
	end
	stringToFormat = "**" .. stringToFormat .. "**"
	return mw.ustring.format(stringToFormat, requested, protectionText, title.pagetype, title:makeViewLink(title.prefixedText))
end

function blurb:makeBody
	local titles = self.titles
	local protectionLevels = titles:getProtectionLevels
	local boxProtectionLevel = self.boxProtectionLevel
	local hasNonInterfacePage = titles:hasNonInterfacePage
	local isPlural = false
	if #titles > 1 then
		isPlural = true
	end

	local descriptionText = "This template must be followed by a **complete and specific description** of the request, "
	if boxProtectionLevel == 'sysop' or boxProtectionLevel == 'templateeditor' then
		local editText = 'edit'
		if isPlural then
			editText = editText .. 's'
		end
		local descriptionCompleteText = mw.ustring.format
		descriptionText = descriptionText .. descriptionCompleteText
	else
		descriptionText = descriptionText .. 'that is, specify what text should be removed and a verbatim copy of the text that should replace it. '
			.. "Please change ''X''" is **not acceptable** and will be rejected; the request **must** be of the form "please change ''X'' to ''Y''".
	end

	local smallText = ''
	if boxProtectionLevel == 'sysop' or boxProtectionLevel == 'templateeditor' then
		local templateFullText
		if boxProtectionLevel == 'sysop' then
			templateFullText = 'fully protected'
		elseif boxProtectionLevel == 'templateeditor' then
			templateFullText = 'template-protected'
		end
		smallText =	'Edit requests to ' .. templateFullText	.. " pages should only be used for edits that are either **uncontroversial** or supported by consensus."
			.. " If the proposed edit might be controversial, discuss it on the protected page's talk page **before** using this template."
	else
		local userText
		local responseTemplate
		if boxProtectionLevel == 'extendedconfirmed' then
			userText = '장기인증된 사용자'
			responseTemplate = blurb.makeTemplateLink('EEp')
		elseif boxProtectionLevel == 'autoconfirmed' then
			userText = '자동 인증된 사용자'
			responseTemplate = blurb.makeTemplateLink('ESp')
		elseif boxProtectionLevel == 'interfaceadmin' then
			userText = '인터페이스 관리자'
			responseTemplate = blurb.makeTemplateLink('EIp')
		else
			userText = 'user'
			responseTemplate = blurb.makeTemplateLink('ESp')
		end
		local answeredPara = blurb.makeParaText
		local stringToFormat =	'The edit may be made by any %s. '
			.. Remember to change the %s parameter to "**yes**" when the request has been accepted, rejected or on hold awaiting user input. 
			.. "This is so that inactive or completed requests don't needlessly fill up the edit requests category. "
			.. 'You may also wish to use the %s template in the response.'
		smallText = mw.ustring.format
	end

	if not isPlural then
		local title = titles[1]
		if title.namespace == 10 or title.namespace == 828 then
			local sandboxTitle = title:getSubpageTitle('연습장')
			if sandboxTitle and sandboxTitle.exists then
				smallText = smallText .. ' Consider making changes first to the '
					.. sandboxTitle:makeViewLink(title.pagetype .. "'s sandbox")
				local testcasesTitle = title:getSubpageTitle('시험장')
				if testcasesTitle and testcasesTitle.exists then
					smallText = smallText .. ' and ' .. testcasesTitle:makeViewLink('test them thoroughly here')
				end
				smallText = smallText .. ' before submitting an edit request.'
			end
		end
	end
	if hasNonInterfacePage then
		smallText = smallText .. ' To request that a page be protected or unprotected, make a protection request.'
	end
	if boxProtectionLevel == 'sysop' or boxProtectionLevel == 'templateeditor' or boxProtectionLevel == 'interfaceadmin' then
		smallText = smallText .. ' When the request has been completed or denied, please add the ' .. blurb.makeParaText .. ' parameter to deactivate the template.'
	end
	return mw.ustring.format
end

function blurb:export
	local intro = self:makeIntro
	local linkLists = self:makeLinkLists
	local body = self:makeBody
	-- Start long links lists on a new line.
	local linkListSep = ' '
	if self.linkCount > 5 then
		linkListSep = ''
	end
	return mw.ustring.format
end

-- Subclass of Module:Protected edit request's box class for active boxes

local box = {}
box.__index = box

function box.new
	-- In the inheritance system used here, an object's metatable is its class, and a class's metatable is its superclass
	local obj = getmetatable(box).new
	setmetatable
	local boxProtectionLevels = {semi = 'autoconfirmed', extended = 'extendedconfirmed', template = 'templateeditor', full = 'sysop', interface = 'interfaceadmin'}
	obj.boxProtectionLevel = boxProtectionLevels[protectionType]
	obj.demo = yesno(args.demo)
	-- Set dependent objects.
	obj.titles = titleTable.new(args)
	if not yesno(args.force) and obj.titles:hasSameProperty('sameProtectionStatus', function (title) return title.protectionLevel end) and obj.titles[1].protectionLevel ~= 'unprotected' then
		obj.boxProtectionLevel = obj.titles[1].protectionLevel
	end
	obj.blurb = blurb.new
	return obj
end

function box:setImage
	local titles = self.titles
	local boxProtectionLevel = self.boxProtectionLevel
	local padlock
	if boxProtectionLevel == 'sysop' then
		padlock = 'Full-protection-shackle.svg'
	elseif boxProtectionLevel == 'interfaceadmin' then
		padlock = 'Interface-protection-shackle.svg '
	elseif boxProtectionLevel == 'templateeditor' then
		padlock = 'Template-protection-shackle.svg'
	elseif boxProtectionLevel == 'autoconfirmed' then
		padlock = 'Semi-protection-shackle.svg'
	elseif boxProtectionLevel == 'extendedconfirmed' then
		padlock = 'Extended-protection-shackle.svg'
	else
		padlock = 'Padlock-bronze-open.svg'
	end
	local stringToFormat = '%dpx|alt=|link='
	local smallPadlock = mw.ustring.format
	local largePadlock = mw.ustring.format
	self:setArg
	self:setArg
end

function box:buildUrnLinks
	local ret = {}
	local boxProtectionLevel = self.boxProtectionLevel
	for titleObj in self.titles:titleIterator do
		table.insert(ret, titleObj:makeUrnLink(boxProtectionLevel))
	end
	return mw.ustring.format('', table.concat(ret))
end

function box:setBlurbText
	self:setArg
end

function box:exportRequestTmbox
	self:setImage
	self:setBlurbText
	self:setArg
	self:setArg('id', title.getProtectionLevelText(self.boxProtectionLevel)) -- for anchor. yes, this leads to multiple elements with the same ID. we should probably fix this at some point
	return makeMessageBox
end

function box:exportRequestCategories
	local cats = {}
	local boxProtectionLevel = self.boxProtectionLevel
	local function addCat(cat)
		table.insert(cats, mw.ustring.format)
	end
	local protectionCats = {
		autoconfirmed = 'Wikipedia semi-protected edit requests',
		extendedconfirmed = 'Wikipedia extended-confirmed-protected edit requests',
		templateeditor = 'Wikipedia template-protected edit requests',
		sysop = 'Wikipedia fully-protected edit requests',
		interfaceadmin = 'Wikipedia interface-protected edit requests'
	addCat(protectionCats[boxProtectionLevel])
	if self.titles:hasOtherProtectionLevel(boxProtectionLevel) then
		addCat('Wikipedia edit requests possibly using incorrect templates')
	end
	return table.concat(cats)
end

function box:export
	if not self.titles.currentTitle.isTalkPage and not self.demo then
		return ''
	end
	local ret = {}
	table.insert
	if not self.demo then
		table.insert
	end
	return table.concat(ret)
end

-- Function exported to Module:Protected edit request

return function
	yesno = yn
	makeMessageBox = mb
	return setmetatable