-- LUA Script - precede every function and global member with lowercase name of script + '_main'
 -- check these are nil first so we can carry over from over levels or saves etc if needs be

 
if g_ironscollected == nil then
    g_ironscollected=0
end
if g_copperscollected == nil then
    g_copperscollected=0
end
if g_leadscollected == nil then
    g_leadscollected=0
end
if g_carboncollected == nil then
    g_carboncollected=0
end

-- added the other material items here if needed
 
--don't change
local oretomake = 1 
orename = {}
ironneeded = {}
copperneeded = {}
leadneeded = {}
carbonneeded = {}
--add other materials here too 
local haveiron = 0
local havecopper = 0
local havelead = 0
local havecarbon = 0
 
--ore names for showing in shop menu
orename[1] = "Iron Ingot"
orename[2] = "Copper Ingot"
orename[3] = "Lead Ingot" 
orename[4] = "Steel Ingot"
--etc 
 
--list out each item requirements here 
ironneeded[1] = 2
 
copperneeded[2] = 2

leadneeded[3] = 2 
 
leadneeded[4] = 2 
carbonneeded[4] = 2 

--etc 
 
--number of items in your list (above)
local maxore = 4
 
 
  
function furnace_init(e)
end
  
  
  
function furnace_main(e)

    --check player is near the funace
    if GetPlayerDistance(e) < 80 then
        --check player presses a number key and it corresponds to our items above 
        if g_Scancode > 1 and g_Scancode <= maxore+1 then -- +1 to maxore because scancodes start at 2 for number 1 
            oretomake = g_Scancode-1 
        end
        --show shop text 
        TextCenterOnX(50,59,1,"Press 1 ~ "..maxore.." to select the Ingot to craft")
        TextCenterOnX(50,62,1,"Press E to Craft a "..orename[oretomake])
        --show how much player has in inventory
        TextCenterOnX(50,65,1,"No of Iron Ore = " .. g_ironscollected .. "  No of Copper Ore = " .. g_copperscollected .. "  No of Lead Ore = " .. g_leadscollected .. "  No of Carbon = " .. g_carboncollected)
        --find out if player has enough of each material seperately 
		if ironneeded[oretomake] ~= nil then
        if g_ironscollected >= ironneeded[oretomake] then
            haveiron = 1 
        else
            haveiron = 0
        end
		end
		if copperneeded[oretomake] ~= nil then
        if g_copperscollected >= copperneeded[oretomake] then
            havecopper = 1 
        else
            havecopper = 0
        end
		end
		if leadneeded[oretomake] ~= nil then
        if g_leadscollected >= leadneeded[oretomake] then
            havelead = 1 
        else
            havelead = 0 
        end
		end
		if  carbonneeded[oretomake] ~= nil then
        if g_carboncollected >= carbonneeded[oretomake] then
            havecarbon = 1 
        else
            havecarbon = 0 
        end	
        end		
        --now we will show number in red if player doesn't have enough 
        if haveiron == 1 then
            TextCenterOnX(50,68,1,ironneeded[oretomake])
        else
            TextCenterOnXColor(50,68,1,ironneeded[oretomake],255,0,0)
        end
        TextCenterOnX(50,71,1,"Iron Ore required")
		
        if havecopper == 1 then
            TextCenterOnX(50,74,1,copperneeded[oretomake])
        else
            TextCenterOnXColor(50,74,1,copperneeded[oretomake],255,0,0)
        end
        TextCenterOnX(50,77,1,"Copper Ore required")
		
        if havelead == 1 then
            TextCenterOnX(50,80,1,leadneeded[oretomake])
        else
            TextCenterOnXColor(50,80,1,leadneeded[oretomake],255,0,0)
        end
        TextCenterOnX(50,83,1,"Lead Ore required")
        if havecarbon == 1 then
            TextCenterOnX(50,80,1,carbonneeded[oretomake])
        else
            TextCenterOnXColor(50,86,1,carbonneeded[oretomake],255,0,0)
        end
        TextCenterOnX(50,89,1,"Carbon required")		
		
         
        --if player presses E to craft 
        if g_KeyPressE == 1 and pressed == 0 then
            pressed = 1
			
			   --not enough materials 
            if haveiron == 0 and havecopper == 0 and havelead == 0  then
                PromptDuration("You do not have enough Ore to craft an "..orename[oretomake],2000)
            end
			
            --crafting is successful
            if haveiron == 1 and havecopper == 1 and havelead == 1 and havemeat == 1 then
                PlaySound(e,1)
                g_ironscollected = g_ironscollected-ironneeded[oretomake]
                g_coppercollected = g_coppercollected-copperneeded[oretomake]
                g_leadscollected = g_leadscollected-leadneeded[oretomake]
				g_carboncollected = g_carboncollected-carbonneeded[oretomake]
				
				
		    if orename[oretomake] == orename[1] then 
			g_iingot = g_iingot + 1
			g_carboncollected = g_carboncollected + 1
			PromptDuration("You Crafted a "..orename[oretomake],2000) 
			
			
			
			elseif orename[oretomake] == orename[2] then  
			g_cingot = g_cingot + 1
			g_carboncollected = g_carboncollected + 1
			PromptDuration("You Crafted a "..orename[oretomake],2000)	
			
			
			elseif orename[oretomake] == orename[3] then
			g_lingot = g_lingot + 1
			g_carboncollected = g_carboncollected + 1
            PromptDuration("You Crafted a "..orename[oretomake],2000) 
			
			
			elseif orename[oretomake] == orename[4] then
			g_singot = g_singot + 1
            PromptDuration("You Crafted a "..orename[oretomake],2000)			
			
        end 
        if g_KeyPressE == 0 then
            pressed = 0
        end
    end
end

end
end