local getArgs = require('Module:Arguments').getArgs

local p = {}

local function isempty(s)
  return s == nil or s == ''
end

local function dataValue(frame, settlementName, parameterName, itemName)
	return frame:expandTemplate{ title = 'Data '..settlementName..' municipality', args = {
		parameterName,
		itemName
	}}
end

local function getNetValue(frame, argCategory, argName)
	local args = getArgs(frame)
	local argType = args['arg_type'] and (args['arg_type']..'_') or ''
	local paramName = argCategory..'_'..argType..argName

	local net = args[paramName] or dataValue(frame, args['subdivision_name'], paramName, args['name'])

	return net
end

function p.nativeName(frame)
	local val = frame.args[1]
	
	if val then
		local match = mw.ustring.match(val, "{{[Ii]nfobox (%a*)")
		--if true then return match end
		if match and match[1] then
			return match[1]
		end
	end
	
	return ""
end

function p.area(frame)
	local args = getArgs(frame)
	
	local argCategory = 'area'
	
	local km2 = getNetValue(frame, argCategory, 'km2')
	local ha = getNetValue(frame, argCategory, 'ha')
	local acre = getNetValue(frame, argCategory, 'acre')
	local sqmi = getNetValue(frame, argCategory, 'sq_mi')
	local dunam = getNetValue(frame, argCategory, 'dunam')
	
	if not (isempty(km2) and isempty(ha) and isempty(acre) and isempty(sqmi) and isempty(dunam)) then
		return frame:expandTemplate{ title = 'infobox_settlement/areadisp', args = {
			['km2'] = km2,
			['ha'] = ha,
			['acre'] = acre,
			['sqmi'] = sqmi,
			['dunam'] = dunam,
			['link'] = args['dunam_link'],
			['pref'] = args['unit_pref'],
			['name'] = args['subdivision_name'],
			['mag'] = args['area_magnitude']
		}}
	else
		return ""
	end
end

function p.demographics(frame)
	local args = getArgs(frame)
	local tArgs = {
		['child'] = 'yes',
		['headerstyle'] = 'text-align:left',
	}

	for i = 1,2 do
		local dtype = getNetValue(frame, 'demographics', 'type'..i)
		if not isempty(dtype) then
			local series = i + 20 * (i-1)
			tArgs['header'..series] = dtype..'<div style="font-weight:normal;display:inline;">'.. getNetValue(frame, 'demographics1', 'footnotes') ..'</div>'
			tArgs['rowclass'..series] = 'mergedtoprow'
			for j = 1,10 do
				local dval = getNetValue(frame, 'demographics1', 'title'..j)
				if not isempty(dval) then
					tArgs['rowclass'..(series + j)] = 'mergedrow'
					tArgs['label'..(series + j)] = '&nbsp;•&nbsp;'..getNetValue(frame, 'demographics1', 'title'..j)
					tArgs['data'..(series + j)] = getNetValue(frame, 'demographics1', 'info'..j)
				end
			end
		end
	end
	
	return frame:expandTemplate{ title = 'infobox', args = tArgs}
end

function p.generic(frame)
	local args = getArgs(frame)
	local paramName = args['param_name']
	
	return getNetValue(frame, 'area', paramName)
end

return p