local p = {}

local cfg = mw.loadData('Module:Navbar/configuration')



local function get_title_arg(is_collapsible, template)

	local title_arg = 1

	if is_collapsible then title_arg = 2 end

	if template then title_arg = 'template' end

	return title_arg

end



local function choose_links(template, args)

	-- The show table indicates the default displayed items.

	-- view, talk, edit, hist, move, watch

	-- TODO: Move to configuration.

	local show = {true, true, true, false, false, false}

	if template then

		show2 = false

		show3 = false

		local index = {t = 2, d = 2, e = 3, h = 4, m = 5, w = 6,

			talk = 2,  = 3, hist = 4, move = 5, watch = 6}

		-- TODO: Consider removing TableTools dependency.

		for _, v in ipairs(require ('Module:TableTools').compressSparseArray(args)) do

			local num = indexv

			if num then shownum = true end

		end

	end



	local remove_edit_link = args.noedit

	if remove_edit_link then show3 = false end

	

	return show

	

end



local function add_link(link_description, ul, is_mini, font_style)

	local l

	if link_description.url then

		l = {'[', '', ']'}

	else

		l = {'[[', '|', ']]'}

	end

	ul:tag('li')

		:addClass('nv-' .. link_description.full)

		:wikitext(l1 .. link_description.link .. l2])

		:tag(is_mini and 'abbr' or 'span')

			:attr('title', link_description.html_title)

			:cssText(font_style)

			:wikitext(is_mini and link_description.mini or link_description.full)

			:done()

		:wikitext(l3])

		:done()

end



local function make_list(title_text, has_brackets, displayed_links, is_mini, font_style)

	

	local title = mw.title.new(mw.text.trim(title_text), cfg.title_namespace)

	if not title then

		error(cfg.invalid_title .. title_text)

	end

	local talkpage = title.talkPageTitle and title.talkPageTitle.fullText or ''

	

	-- TODO: Get link_descriptions and show into the configuration module.

	-- link_descriptions should be easier...

	local link_descriptions = {

		{ 'mini' = 'v', 'full' = 'view', 'html_title' = 'View this template',

			'link' = title.fullText, 'url' = false },

		{ 'mini' = 't', 'full' = 'talk', 'html_title' = 'Discuss this template',

			'link' = talkpage, 'url' = false },

		{ 'mini' = 'e', 'full' = 'edit', 'html_title' = 'Edit this template',

			'link' = 'Special:EditPage/' .. title.fullText, 'url' = false },

		{ 'mini' = 'h', 'full' = 'hist', 'html_title' = 'History of this template',

			'link' = 'Special:PageHistory/' .. title.fullText, 'url' = false },

		{ 'mini' = 'm', 'full' = 'move', 'html_title' = 'Move this template',

			'link' = mw.title.new('Special:Movepage'):fullUrl('target='..title.fullText), 'url' = true },

		{ 'mini' = 'w', 'full' = 'watch', 'html_title' = 'Watch this template', 

			'link' = title:fullUrl('action=watch'), 'url' = true }

	}



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

	if has_brackets then

		ul:addClass(cfg.classes.brackets)

			:cssText(font_style)

	end

	

	for i, _ in ipairs(displayed_links) do

		if displayed_linksi then add_link(link_descriptionsi], ul, is_mini, font_style) end

	end

	return ul:done()

	

end



function p._navbar(args)

	

	-- TODO: We probably don't need both fontstyle and fontcolor...

	local font_style = args.fontstyle

	local font_color = args.fontcolor

	local is_collapsible = args.collapsible

	local is_mini = args.mini

	local is_plain = args.plain

	

	local collapsible_class = nil

	if is_collapsible then

		collapsible_class = cfg.classes.collapsible

		if not is_plain then is_mini = 1 end

		if font_color then

			font_style = (font_style or '') .. '; color: ' .. font_color .. ';'

		end

	end

	

	local navbar_style = args.style

	local div = mw.html.create():tag('div')

	div

		:addClass(cfg.classes.navbar)

		:addClass(cfg.classes.plainlinks)

		:addClass(cfg.classes.horizontal_list)

		:addClass(collapsible_class) -- we made the determination earlier

		:cssText(navbar_style)



	if is_mini then div:addClass(cfg.classes.mini) end



	local box_text = (args.text or cfg.box_text) .. ' '

	 -- the concatenated space guarantees the box text is separated

	if not (is_mini or is_plain) then

		div

			:tag('span')

				:addClass(cfg.classes.box_text)

				:cssText(font_style)

				:wikitext(box_text)

	end

	

	local template = args.template

	local displayed_links = choose_links(template, args)

	local has_brackets = args.brackets

	local title_arg = get_title_arg(is_collapsible, template)

	local title_text = argstitle_arg or (':' .. mw.getCurrentFrame():getParent():getTitle())

	local list = make_list(title_text, has_brackets, displayed_links, is_mini, font_style)

	div:node(list)



	if is_collapsible then

		local title_text_class

		if is_mini then

			title_text_class = cfg.classes.collapsible_title_mini

		else

			title_text_class = cfg.classes.collapsible_title_full

		end

		div:done()

			:tag('div')

			:addClass(title_text_class)

			:cssText(font_style)

			:wikitext(args1])

	end

	

	local frame = mw.getCurrentFrame()

	-- hlist -> navbar is best-effort to preserve old Common.css ordering.

	return frame:extensionTag{

		name = 'templatestyles', args = { src = cfg.hlist_templatestyles }

	} .. frame:extensionTag{

		name = 'templatestyles', args = { src = cfg.templatestyles }

	} .. tostring(div:done())

end



function p.navbar(frame)

	return p._navbar(require('Module:Arguments').getArgs(frame))

end



return p