local meBridge = peripheral.wrap("left") -- Connect to ME Bridge on the left side
local monitor = peripheral.find("monitor") -- Find a connected monitor

if not meBridge then
    print("Error: ME Bridge not found on the left side!")
    return
else
    print("ME Bridge successfully detected!")
end

if not monitor then
    print("Error: No monitor found!")
    return
else
    print("Monitor successfully detected!")
    monitor.setTextScale(1) -- Set text scale for better visibility
end

-- Function to safely print table contents without serialization issues
function printTable(tbl, indent)
    indent = indent or ""
    for k, v in pairs(tbl) do
        if type(v) == "table" then
            print(indent .. tostring(k) .. " = {")
            printTable(v, indent .. "  ")
            print(indent .. "}")
        else
            print(indent .. tostring(k) .. " = " .. tostring(v))
        end
    end
end

-- Function to calculate total item count safely
function getTotalItemCount()
    local items = meBridge.listItems()
    if not items or type(items) ~= "table" then
        print("No items detected in ME system or invalid data!")
        return 0
    end

    local total = 0
    for _, item in pairs(items) do
        if type(item) == "table" and type(item.amount) == "number" then
            total = total + item.amount
        else
            print("Warning: Skipping invalid item entry:")
            printTable(item, "  ")
        end
    end
    return total
end

-- Function to update the monitor display
function updateMonitor(total)
    monitor.clear()
    monitor.setCursorPos(1, 1)
    monitor.write("Total Items in ME System:")
    monitor.setCursorPos(1, 3)
    monitor.write(tostring(total))
end

-- Debugging: Print the list of items in a safe way
print("Debug: Raw ME System Data")
local items = meBridge.listItems()
if items and type(items) == "table" then
    printTable(items)
else
    print("Invalid or empty item list.")
end

-- Continuously update the monitor and print to terminal
while true do
    local totalCount = getTotalItemCount()
    print("Total Items in ME System: " .. tostring(totalCount))
    updateMonitor(totalCount)
    sleep(5) -- Updates every 5 seconds
end