import { loadavg } from "node:os";

type CpuState = {
  samples: Array<{ ts: number; value: number }>;
};

export const initialState: CpuState = { samples: [] };

export async function compute(state: CpuState): Promise<{
  state: CpuState;
  workflow: null;
}> {
  const [oneMin] = loadavg();
  const value = typeof oneMin === "number" && !Number.isNaN(oneMin) ? oneMin : 0;
  const newSamples = [...state.samples.slice(-99), { ts: Date.now(), value }];
  return { state: { samples: newSamples }, workflow: null };
}