local export = {}
local m_links = require("Module:links")
local zh = require("Module:languages").getByCode("zh")

local variety_list = {
	"Classical", "Formal", "Taxonomic", 
	"Mandarin", "Cantonese", "Gan", "Hakka", "Huizhou", "Jin", "Jiuxing Yumin",
	"Northern Min", "Eastern Min", "Southern Min", "Puxian Min", "Central Min", "Shaojiang Min", "Zhongshan Min",
	"Southern Pinghua", "Northern Pinghua", "Shehua", "Waxiang", "Wu", "Xiang"
}

local variety_colour = {
			= "FAF0F2",
				= "FAF0F2",
			= "FAF0F2",
			= "FAF5F0",
			= "F0F5FA",
					= "F0FAF3",
				= "FAF0F6",
				= "FAF9F0",
					= "FAF5F0",
		= "FAF0FE",
		= "F7FAF0",
			= "F7FAF0",
		= "F7FAF0",
			= "F7FAF0",
			= "F7FAF0",
		= "F7FAF0",
		= "F7FAF0",
	= "F0F5FA",
	= "F0F5FA",
				= "FAF0F6",
				= "F0FAF6",
					= "F4F0FA",
				= "F0F2FA",
}

local special_note = {
	 = "]",
	 = "Formal <small>(])</small>",
	 = "Taxonomic name",
}

function export.main(frame)
	local data = {}
	local args = frame:getParent().args
	local pagename = mw.title.getCurrentTitle().text
	local target_page = args or pagename
	local resource_page = "Module:zh/data/dial-syn/" .. target_page
	local m_syndata
	if mw.title.new(resource_page).exists then
		m_syndata = require(resource_page).list
	else
		return frame:expandTemplate{ title = "Template:zh-dial/uncreated", args = { target_page } }
	end
	
	--allow alternative title linking for sum-of-parts tables
	local title = m_syndata and m_syndata ~= "" and m_syndata or target_page
	
	local main_title = m_links.full_link( { term = title:gsub("", "") .. "//", lang = zh, tr = "-" } )
	
	local syn_table = { [=[
	<div class="NavFrame" style="border:0px; max-width: 40em; text-align:center;"><div class="NavHead" style="font-size:105%; border:1px solid #aaaaaa; margin-left:-1px; background-color:#CCCCFF; text-align:center;" cellpadding="3">Dialectal synonyms of ]=] ..
		main_title .. ' (“' .. m_syndata .. '”) ' ..
		"]\n' .. [=[</div><div class="NavContent"> 
	{| class="wikitable" style="margin:0; text-align:center; width: 100%"
	|-
	! style="background:#E8ECFA" | Variety
	! style="background:#E8ECFA" | Location
	! style="background:#E8ECFA" | Words]=] .. [=[
	<div style="float: right; clear: right; font-size:60%"><span class="plainlinks">=] ..
		tostring(mw.uri.fullUrl("Module:zh/data/dial-syn/" .. target_page, {  = "edit" })) ..
	' edit]</span></div>' }
	
	local note = m_syndata
	if m_syndata == "" then
		data = { target_page }
	elseif m_syndata == "-" then
		data = nil
	else
		data = m_syndata
	end

	local m_dialdata = require("Module:User:Wpi/zh/data/dial")
	local variety = ""
	local current_variety = ""
	local location_name = ""
	local location_link = ""
	local colour = ""
	local exists = {}
	local variety_count = {}
	local formatted_synonyms = {}
	local loc = {}
	local cur = {}
	for i, v in pairs(variety_list) do
		variety_count = 0
	end

	for i = 1,#m_dialdata,1 do
		loc = m_dialdata
		cur = m_syndata or {""}
		if cur == "" then
			exists = false
		else
			exists = true
			variety = loc.group
			variety_count = variety_count + 1
		end
	end
	
	for i = 1,#exists,1 do
		if exists then
			loc = m_dialdata
			variety = loc.group
			location_name = (loc.english or loc.key):gsub("(%(.*%))", "<small>%1</small>")
			location_link = loc.link or loc.key
			mw.log(loc.key)
			for i, synonym in ipairs(m_syndata) do
				local synonym_note = mw.text.split(synonym, ":")
				local synonym_etym = mw.text.split(synonym_note, "_")
				local syn, etym, note = synonym_etym, synonym_etym, synonym_note
				local synonym_link = m_links.full_link( {
						term = syn .. (etym and string.format("#Etymology %s", etym) or "") .. "//",
						alt = etym and (syn .. string.format("<sub>%s</sub>", etym)) .. "//",
						lang = zh,
						tr = "-"
					} )
				if note == "GT" then
					require('Module:debug/track')("zh-dial-GT")
				end
				note = note and ' <span style="font-size:60%"><i>' .. note .. '</i></span>' or ""
				table.insert(formatted_synonyms, synonym_link .. note)
			end
			table.insert(syn_table, "\n|-")
			if variety ~= current_variety then
				current_variety = variety
				colour = variety_colour
				table.insert(syn_table, "\n!rowspan=" .. variety_count .. (special_note and " colspan=2" or "") .. 
				' style="background:#' .. colour .. '"| ' .. (special_note or variety))
			end
			table.insert(syn_table,
				((location_name and not special_note) and ('\n|style="background:#' .. colour .. '"| ' .. 
				']') or '') ..
				'\n|style="background:#' .. colour .. '"| ' ..
				table.concat(formatted_synonyms, ", "))
		end
	end
	
	if note and note ~= "" then
		table.insert(syn_table, '\n|-\n! style="background:#FFF7FB; padding-top:5px; padding-bottom: 5px" | ' ..
			"<small>Note</small>\n| colspan=2|<small><i>" .. note .. "</i></small>")
	end
	
	table.insert(syn_table, '\n|}</div></div>')
	
	return table.concat(syn_table, "")
end

return export