// src/index.ts
import { loadavg, totalmem, freemem, uptime } from "node:os";
import { execSync } from "node:child_process";
import { readFile } from "node:fs/promises";

// src/schema.ts
import { integer, real, sqliteTable } from "drizzle-orm/sqlite-core";
var snapshots = sqliteTable("snapshots", {
  ts: integer("ts").primaryKey(),
  cpuLoad1m: real("cpu_load_1m").notNull(),
  cpuLoad5m: real("cpu_load_5m").notNull(),
  cpuLoad15m: real("cpu_load_15m").notNull(),
  memTotalMB: integer("mem_total_mb").notNull(),
  memUsedMB: integer("mem_used_mb").notNull(),
  memUsedPct: real("mem_used_pct").notNull(),
  diskTotalGB: real("disk_total_gb").notNull(),
  diskUsedGB: real("disk_used_gb").notNull(),
  diskUsedPct: real("disk_used_pct").notNull(),
  uptimeSec: integer("uptime_sec").notNull(),
  // TCP socket stats (merged from linux-tcp-socket-stats)
  socketsUsed: integer("sockets_used"),
  tcpInuse: integer("tcp_inuse"),
  tcpOrphan: integer("tcp_orphan"),
  tcpTw: integer("tcp_tw"),
  tcpAlloc: integer("tcp_alloc"),
  tcpMemPages: integer("tcp_mem_pages")
});

// src/index.ts
var SOCKSTAT_PATH = "/proc/net/sockstat";
function parseSockstat(content) {
  let socketsUsed = 0, tcpInuse = 0, tcpOrphan = 0, tcpTw = 0, tcpAlloc = 0, tcpMemPages = 0;
  for (const line of content.split("\n")) {
    const trimmed = line.trim();
    if (trimmed.startsWith("sockets:")) {
      const parts = trimmed.split(/\s+/);
      const idx = parts.indexOf("used");
      if (idx !== -1 && idx + 1 < parts.length) {
        socketsUsed = Number.parseInt(parts[idx + 1], 10) || 0;
      }
    } else if (trimmed.startsWith("TCP:")) {
      const parts = trimmed.split(/\s+/);
      const map = {};
      for (let i = 1; i + 1 < parts.length; i += 2) {
        map[parts[i]] = Number.parseInt(parts[i + 1], 10) || 0;
      }
      tcpInuse = map.inuse ?? 0;
      tcpOrphan = map.orphan ?? 0;
      tcpTw = map.tw ?? 0;
      tcpAlloc = map.alloc ?? 0;
      tcpMemPages = map.mem ?? 0;
    }
  }
  return { socketsUsed, tcpInuse, tcpOrphan, tcpTw, tcpAlloc, tcpMemPages };
}
async function compute(_signal) {
  const [load1, load5, load15] = loadavg();
  const memTotal = totalmem();
  const memFree = freemem();
  const memUsed = memTotal - memFree;
  const memTotalMB = Math.round(memTotal / 1024 / 1024);
  const memUsedMB = Math.round(memUsed / 1024 / 1024);
  const memUsedPct = Math.round(memUsed / memTotal * 1e4) / 100;
  let diskTotalGB = 0, diskUsedGB = 0, diskUsedPct = 0;
  try {
    const df = execSync("df -B1 / | tail -1", { encoding: "utf-8" }).trim();
    const parts = df.split(/\s+/);
    const total = Number(parts[1]);
    const used = Number(parts[2]);
    diskTotalGB = Math.round(total / 1024 / 1024 / 1024 * 100) / 100;
    diskUsedGB = Math.round(used / 1024 / 1024 / 1024 * 100) / 100;
    diskUsedPct = total > 0 ? Math.round(used / total * 1e4) / 100 : 0;
  } catch {
  }
  let tcp = { socketsUsed: 0, tcpInuse: 0, tcpOrphan: 0, tcpTw: 0, tcpAlloc: 0, tcpMemPages: 0 };
  try {
    const content = await readFile(SOCKSTAT_PATH, "utf8");
    tcp = parseSockstat(content);
  } catch {
  }
  const ts = Date.now();
  const uptimeSec = Math.round(uptime());
  return {
    ts,
    cpuLoad1m: load1,
    cpuLoad5m: load5,
    cpuLoad15m: load15,
    memTotalMB,
    memUsedMB,
    memUsedPct,
    diskTotalGB,
    diskUsedGB,
    diskUsedPct,
    uptimeSec,
    socketsUsed: tcp.socketsUsed,
    tcpInuse: tcp.tcpInuse,
    tcpOrphan: tcp.tcpOrphan,
    tcpTw: tcp.tcpTw,
    tcpAlloc: tcp.tcpAlloc,
    tcpMemPages: tcp.tcpMemPages
  };
}
export {
  compute,
  snapshots as table
};