local p = {}

function noblank(str)
	if str == '' then
		return ' '
	else
		return str
	end
end

-- 

function p.compare(frame)
    local sideheaders = mw.html.create('table')
    local comptbl = mw.html.create('table')

	sideheaders
		:attr('style', 'float:left; margin:0; margin-right:-1px;')
        :attr('class', 'wikitable')

    comptbl
        :attr('style', 'margin: 0; text-align: center;')
        :attr('class', 'chip-infobox')
        :attr('class', 'wikitable')
        
    -- foundry name
    sideheaders:tag('tr'):tag('th')
    	:attr('style', 'text-align: right;')
    	:attr('colspan', '2')
    	:wikitext('Foundry')
    local fabs = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' name'] then break end
		fabs:tag('th'):attr('colspan', '2'):wikitext('[[' 
			.. (frame.args['fab ' .. i .. ' name link'] and frame.args['fab ' .. i .. ' name link'] or frame.args['fab ' .. i .. ' name'])
			.. '|' .. frame.args['fab ' .. i .. ' name'] .. ']]')
	end
	comptbl:node(fabs)
	
    -- date
    sideheaders:tag('tr'):tag('th')
    	:attr('style', 'text-align: right;')
    	:attr('colspan', '2')
    	:wikitext('1st Production')
    local fdate = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' name'] then break end
		fdate:tag('td'):attr('colspan', '2'):wikitext(frame.args['fab ' .. i .. ' date'])
	end
	comptbl:node(fdate)
	
	-- wafers
	local waferheader = mw.html.create('tr')
	waferheader:tag('th')
    	:attr('style', 'text-align: center;')
    	:attr('rowspan', '2')
    	:wikitext('Wafer')
	waferheader:tag('th')
    	:attr('style', 'text-align: right;')
    	:wikitext('Type')
	waferheader:tag('th')
    	:attr('style', 'text-align: right;')
    	:wikitext('Size')
	sideheaders:node(waferheader)
	
	-- wafer type
    local wtype = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' wafer.type'] then break end
		wtype:tag('td'):attr('colspan', '2'):wikitext(frame.args['fab ' .. i .. ' wafer.type'])
	end
	comptbl:node(wtype)
	
	-- xtor tech
    local xtorsize = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' xtor.tech'] then break end
		xtorsize:tag('td'):attr('colspan', '2'):wikitext(frame.args['fab ' .. i .. ' xtor.tech'])
	end
	comptbl:node(xtorsize)
	
	-- xtor type
    local xtortype = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' xtor.type'] then break end
		xtortype:tag('td'):attr('colspan', '2'):wikitext(frame.args['fab ' .. i .. ' xtor.type'])
	end	
	comptbl:node(xtortype)
	
	-- xtor voltage
    local xtorvolt = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' xtor.volt'] then break end
		xtorvolt:tag('td'):attr('colspan', '2'):wikitext(frame.args['fab ' .. i .. ' xtor.volt'])
	end
	comptbl:node(xtorvolt)
	
	-- metal layers
    local layers = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' layers'] then break end
		layers:tag('td'):attr('colspan', '2'):wikitext(frame.args['fab ' .. i .. ' layers'])
	end
	comptbl:node(layers)
	
	
	
	-- diff from
    local diffrom = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' diff from'] then break end
		
		if frame.args['fab ' .. i .. ' diff from'] == '@' then
			diffrom:tag('th'):wikitext('Value')
			diffrom:tag('th')
				:attr('rowspan', '10')
				:attr('style', 'background: #a3a3a3;')
				:wikitext('N/A')
		else
			diffrom:tag('th'):wikitext('Value')
			diffrom:tag('th'):wikitext(frame.args['fab ' .. i .. ' diff from'])
		end
	end
	comptbl:node(diffrom)


	-- gate length
    local gatelength = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' xtor.lg'] then break end
		gatelength:tag('td'):wikitext(frame.args['fab ' .. i .. ' xtor.lg'])
		if frame.args['fab ' .. i .. ' diff from'] ~= '@' then
			gatelength:tag('td'):wikitext(frame.args['fab ' .. i .. ' xtor.lgΔ'])
		end
	end
	comptbl:node(gatelength)
	
	-- cpp
    local cpp = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' xtor.cpp'] then break end
		cpp:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' xtor.cpp']))
		if frame.args['fab ' .. i .. ' diff from'] ~= '@' then
			cpp:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' xtor.cppΔ']))
		end
	end
	comptbl:node(cpp)
	
	-- mmp
    local mmp = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' xtor.mmp'] then break end
		mmp:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' xtor.mmp']))
		if frame.args['fab ' .. i .. ' diff from'] ~= '@' then
			mmp:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' xtor.mmpΔ']))
		end
	end
	comptbl:node(mmp)
	
	
	-- sram.hp
    local sramhp = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' sram.hp'] then break end
		sramhp:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' sram.hp']))
		if frame.args['fab ' .. i .. ' diff from'] ~= '@' then
			sramhp:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' sram.hpΔ']))
		end
	end
	comptbl:node(sramhp)
	-- sram.hd
    local sramhd = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' sram.hd'] then break end
		sramhd:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' sram.hd']))
		if frame.args['fab ' .. i .. ' diff from'] ~= '@' then
			sramhd:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' sram.hdΔ']))
		end
	end
	comptbl:node(sramhd)
	-- sram.lv
    local sramlv = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' sram.lv'] then break end
		sramlv:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' sram.lv']))
		if frame.args['fab ' .. i .. ' diff from'] ~= '@' then
			sramlv:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' sram.lvΔ']))
		end
	end
	comptbl:node(sramlv)
	
	
	-- dram.edram
    local edram = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' dram.edram'] then break end
		edram:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' dram.edram']))
		if frame.args['fab ' .. i .. ' diff from'] ~= '@' then
			edram:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' dram.edramΔ']))
		end
	end
	comptbl:node(edram)
	
	
	
   	--
   	-- We need to combine the two tables
   	local maindiv = mw.html.create('div')
   	local sidediv = mw.html.create('div')
   		-- some styles for everything
   		maindiv:attr('style', 'font-family: monospace;')
   		-- add out side table
   		maindiv:node(sideheaders)
   		--make sure the table can overflow nicely
   		sidediv:attr('style', 'overflow-x:auto; white-space:nowrap;')
   		sidediv:node(comptbl)
   		-- add the side div to the main div
   		maindiv:node(sidediv)
   		
	return maindiv
end


return p