PowerGridScanned = false
function GetGlobalGridSurfaces()
    local globalGrids = {}
    for _,surface in pairs(game.surfaces) do
        if(surface.has_global_electric_network) then
            globalGrids[#globalGrids+1] = surface
        end
        --log("Surface: "..surface.name.." has global electric network: "..tostring(grids))
    end
end

function UpdateGrids(event)
    local entity = event.entity
    local gridID = entity.electric_network_id
    if gridID == nil then return end
    storage.electricGrids[gridID] = (storage.electricGrids[gridID] or 0) + 1
    log(("Network %d has counter of %d"):format(gridID,storage.electricGrids[gridID]))
end

function PurgeNetworks()
    for ID, Counter in pairs(storage.electricGrids) do
        if Counter <= 0 then
            table.remove(storage.electricGrids, ID)
            log(("Removed electric network with id %d from list"):format(ID))
        end
    end
end


function GenerateNetworks()
    if PowerGridScanned==false then
    for _,surface in pairs(game.surfaces) do
        for _, powerPole in pairs(surface.find_entities_filtered({filter = "type",type = "electric-pole"})) do
            storage.electricGrids[powerPole.electric_network_id] = (storage.electricGrids[powerPole.electric_network_id] or 0) + 1
        end
        
    end
end
    PowerGridScanned = true
end