local p = {}

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

-- 

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

    comptbl
        :attr('style', 'text-align: center;')
        :attr('class', 'chip-infobox')
        :attr('class', 'wikitable')
        
    -- foundry name
    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
    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)
	
	-- 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)
	
	-- mpp
    local mpp = mw.html.create('tr')
    for i = 1, 10 do
		if not frame.args['fab ' .. i .. ' xtor.mpp'] then break end
		mpp:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' xtor.mpp']))
		if frame.args['fab ' .. i .. ' diff from'] ~= '@' then
			mpp:tag('td'):wikitext(noblank(frame.args['fab ' .. i .. ' xtor.mppΔ']))
		end
	end
	comptbl:node(mpp)
	
   	  
   	  
	return comptbl
end


return p