local reader = peripheral.find("blockReader")
if not reader then
    print("Error: Block Reader not found!")
    return
end

while true do
    term.clear()
    term.setCursorPos(1,1)
    print("=== CRN Advanced Display Parser ===")
    
    local success, data = pcall(reader.getBlockData)
    
    if success and data and data.TrainStops then
        local now = os.epoch("utc") / 50 -- Minecraft ticks (approx)
        
        for i, stop in ipairs(data.TrainStops) do
            local st = stop.Station
            if st then
                local trainName = st.TrainName or "Unknown"
                local dest = st.Destination or "Unknown"
                
                -- 时间计算
                local scheduledArrival = st.ScheduledArrival or 0
                local realArrival = st.RealTimeArrival or 0
                
                -- 计算 ETA (秒)
                local etaTicks = realArrival - data.LastRefreshed
                local etaSeconds = math.floor(etaTicks / 20)
                if etaSeconds < 0 then etaSeconds = 0 end
                
                -- 计算 Delay (分钟)
                local delayTicks = realArrival - scheduledArrival
                local delayMinutes = math.floor(delayTicks / (20 * 60))
                if delayMinutes < 0 then delayMinutes = 0 end
                
                print(string.format("[%d] Train: %s -> %s", i, trainName, dest))
                print(string.format("    ETA: %d seconds", etaSeconds))
                print(string.format("    Delay: %d minutes", delayMinutes))
                print("---------------------------------")
            end
        end
    else
        print("Waiting for CRN data...")
    end
    
    os.sleep(1)
end