import fs from "node:fs";
import path from "node:path";
import { execSync, spawn } from "node:child_process";

if (!process.env.__OPENCLAW_PREFLIGHT_DONE) {
  process.env.__OPENCLAW_PREFLIGHT_DONE = "1";

  const isGateway = process.argv.some(arg => arg.endsWith("openclaw.mjs") || arg.endsWith("openclaw")) && process.argv.includes("gateway");

  if (isGateway) {
    const t0 = Date.now();
    console.log("[gateway-preflight] Initializing container self-healing preflight...");

    // 1. Clean up stale gateway lock files from ungraceful kills
    for (const dir of ["/tmp/openclaw-1000", "/tmp"]) {
      if (fs.existsSync(dir)) {
        try {
          const files = fs.readdirSync(dir);
          for (const file of files) {
            if (file.startsWith("gateway") && file.endsWith(".lock")) {
              const fullPath = path.join(dir, file);
              fs.unlinkSync(fullPath);
              console.log(`[gateway-preflight] Removed stale lock: ${fullPath}`);
            }
          }
        } catch (e) {
          console.warn(`[gateway-preflight] Lock cleanup warning in ${dir}:`, e.message);
        }
      }
    }

    // 2. Clear false database quarantines
    const qPath = "/home/node/.openclaw/state/openclaw-quarantine.sqlite";
    if (fs.existsSync(qPath)) {
      try {
        execSync(`/home/node/.openclaw/.local/bin/python3 -c "import sqlite3; c=sqlite3.connect(\x27${qPath}\x27); c.execute(\x27DELETE FROM quarantined_databases\x27); c.commit(); c.close()"`, { stdio: "ignore" });
        console.log("[gateway-preflight] Cleared database quarantine.");
      } catch (_) {}
    }

    // 3. Deduplicate subagent vector databases (keeps non-main agent DBs < 15MB)
    try {
      execSync("/home/node/.openclaw/.local/bin/python3 /home/node/.openclaw/scripts/dedup_subagent_vectors.py", { stdio: "inherit" });
    } catch (e) {
      console.warn("[gateway-preflight] Vector deduplication warning:", e.message);
    }

    // 4. Pre-warm page cache sequentially (transforms random 70 IOPS disk reads into sequential streaming)
    try {
      const pw0 = Date.now();
      execSync("cat /home/node/.openclaw/state/openclaw.sqlite /home/node/.openclaw/agents/*/agent/openclaw-agent.sqlite > /dev/null 2>&1 || true; find /home/node/.openclaw/wiki/main /home/node/.openclaw/workspace* -maxdepth 3 -name '*.md' -exec cat {} + > /dev/null 2>&1 || true");
      console.log(`[gateway-preflight] Pre-warmed SQLite databases and Wiki markdown in ${Date.now() - pw0}ms`);
    } catch (_) {}

    // 5. Recover any wedged running sessions left over from ungraceful container restart
    try {
      execSync("/home/node/.openclaw/.local/bin/python3 /home/node/.openclaw/scripts/recover_sessions.py", { stdio: "inherit" });
    } catch (e) {
      console.warn("[gateway-preflight] Session recovery warning:", e.message);
    }

    // 6. Spawn background turn replay daemon if interrupted turns were detected
    try {
      if (fs.existsSync("/tmp/openclaw-interrupted-turns.json")) {
        console.log("[gateway-preflight] Spawning background turn replay daemon...");
        const child = spawn("/home/node/.openclaw/.local/bin/python3", ["/home/node/.openclaw/scripts/replay_interrupted_turns.py"], {
          detached: true,
          stdio: "ignore"
        });
        child.unref();
      }
    } catch (e) {
      console.warn("[gateway-preflight] Could not spawn turn replay daemon:", e.message);
    }

    console.log(`[gateway-preflight] Self-healing completed in ${Date.now() - t0}ms.`);
  }
}