import { GLib } from "astal";

const calculateRamUsage = (): string => {
  try {
    const [success, meminfoBytes] = GLib.file_get_contents("/proc/meminfo");

    if (!success || !meminfoBytes) {
      throw new Error("Failed to read /proc/meminfo or file content is null.");
    }

    const meminfo = new TextDecoder("utf-8").decode(meminfoBytes);

    const totalMatch = meminfo.match(/MemTotal:\s+(\d+)/);
    const availableMatch = meminfo.match(/MemAvailable:\s+(\d+)/);

    if (!totalMatch || !availableMatch) {
      throw new Error("Failed to parse /proc/meminfo for memory values.");
    }

    const totalRamInBytes = parseInt(totalMatch[1], 10) * 1024;
    const availableRamInBytes = parseInt(availableMatch[1], 10) * 1024;

    let usedRam = totalRamInBytes - availableRamInBytes;
    usedRam = isNaN(usedRam) || usedRam < 0 ? 0 : usedRam;

    const ramstring =
      "    " + Math.floor((usedRam / totalRamInBytes) * 100) + "%";

    return ramstring;
  } catch (error) {
    console.error("Error calculating RAM usage:", error);
    return "";
  }
};

export default calculateRamUsage;