// Smoke tests for bastion CLI commands.
// These tests spawn real processes and verify they work end-to-end.

import { describe, it, expect, afterEach } from "vitest";
import { spawn, execSync, type ChildProcess } from "node:child_process";
import { existsSync, readFileSync, mkdirSync, rmSync } from "node:fs";
import { join } from "node:path";
import { tmpdir } from "node:os";

const CLI_PATH = join(import.meta.dirname, "..", "src", "index.ts");
const TEST_DIR = join(tmpdir(), `lab-bastion-smoke-${process.pid}`);
const PID_FILE = join(TEST_DIR, "bastion.pid");
const LOG_FILE = join(TEST_DIR, "bastion.log");
const TEST_PORT = 18932; // Unlikely to conflict

function runCli(args: string[], timeoutMs = 10_000): Promise<{ code: number; stdout: string; stderr: string }> {
  return new Promise((resolve, reject) => {
    const child = spawn("node", ["--import", "tsx", CLI_PATH, ...args], {
      timeout: timeoutMs,
      env: { ...process.env, NODE_NO_WARNINGS: "1" },
    });

    let stdout = "";
    let stderr = "";
    child.stdout.on("data", (d: Buffer) => { stdout += d.toString(); });
    child.stderr.on("data", (d: Buffer) => { stderr += d.toString(); });

    child.on("close", (code) => {
      resolve({ code: code ?? 1, stdout, stderr });
    });
    child.on("error", reject);
  });
}

function sleep(ms: number): Promise<void> {
  return new Promise((r) => setTimeout(r, ms));
}

function killPid(pid: number): void {
  try { process.kill(pid, "SIGTERM"); } catch { /* already dead */ }
}

describe("bastion smoke tests", () => {
  let daemonPid: number | undefined;

  afterEach(() => {
    // Kill any daemon we started
    if (daemonPid) {
      killPid(daemonPid);
      daemonPid = undefined;
    }
    // Also try PID file
    try {
      const pid = parseInt(readFileSync(PID_FILE, "utf-8").trim(), 10);
      if (!isNaN(pid)) killPid(pid);
    } catch { /* no pid file */ }

    // Clean up test directory
    try { rmSync(TEST_DIR, { recursive: true, force: true }); } catch { /* ignore */ }
  });

  it("--help prints usage without error", async () => {
    const result = await runCli(["--help"]);
    expect(result.code).toBe(0);
    expect(result.stdout).toContain("labctl");
    expect(result.stdout).toContain("Commands:");
  });

  it("--version prints version", async () => {
    const result = await runCli(["--version"]);
    expect(result.code).toBe(0);
    expect(result.stdout.trim()).toMatch(/^\d+\.\d+\.\d+$/);
  });

  it("version subcommand prints detailed info", async () => {
    const result = await runCli(["version"]);
    expect(result.code).toBe(0);
    expect(result.stdout).toContain("labctl");
    expect(result.stdout).toContain("node");
    expect(result.stdout).toContain("platform");
  });

  it("config list works without config file", async () => {
    const result = await runCli(["config", "list"]);
    expect(result.code).toBe(0);
    expect(result.stdout).toContain("labdUrl");
  });

  it("config path prints a path", async () => {
    const result = await runCli(["config", "path"]);
    expect(result.code).toBe(0);
    expect(result.stdout.trim()).toContain(".labctl");
  });

  it("start without root prints helpful error", async () => {
    // Only run if we're NOT root (CI may run as root)
    if (process.getuid?.() === 0) return;

    const result = await runCli([
      "init", "bastion", "standalone", "start",
      "--dir", TEST_DIR,
      "--port", String(TEST_PORT),
    ]);
    expect(result.code).toBe(1);
    expect(result.stderr).toContain("root");
    expect(result.stderr).toContain("sudo");
  });

  it("foreground start with --skip-dnsmasq --skip-artifacts works and stays alive", async () => {
    mkdirSync(TEST_DIR, { recursive: true });

    // Start in foreground as a child process
    const child = spawn(
      "node",
      [
        "--import", "tsx",
        CLI_PATH,
        "init", "bastion", "standalone", "start", "--foreground",
        "--skip-dnsmasq", "--skip-artifacts",
        "--dir", TEST_DIR,
        "--port", String(TEST_PORT),
      ],
      {
        env: { ...process.env, NODE_NO_WARNINGS: "1" },
        stdio: ["ignore", "pipe", "pipe"],
      },
    );

    daemonPid = child.pid;

    // Collect output
    let stdout = "";
    child.stdout.on("data", (d: Buffer) => { stdout += d.toString(); });

    let stderr = "";
    child.stderr.on("data", (d: Buffer) => { stderr += d.toString(); });

    // Wait for the server to start (look for the banner)
    const startedAt = Date.now();
    const maxWait = 10_000;
    while (Date.now() - startedAt < maxWait) {
      if (stdout.includes("Waiting for PXE boot requests")) break;
      await sleep(200);
    }

    expect(stdout).toContain("Waiting for PXE boot requests");
    expect(stdout).toContain("HTTP server listening");

    // Verify the process is still alive after startup
    await sleep(1000);
    let alive = false;
    try {
      process.kill(child.pid!, 0);
      alive = true;
    } catch { /* dead */ }
    expect(alive).toBe(true);

    // Verify PID file was created
    expect(existsSync(PID_FILE)).toBe(true);
    const pidFromFile = parseInt(readFileSync(PID_FILE, "utf-8").trim(), 10);
    expect(pidFromFile).toBe(child.pid);

    // Verify HTTP server responds
    try {
      const resp = await fetch(`http://127.0.0.1:${TEST_PORT}/api/machines`);
      expect(resp.ok).toBe(true);
    } catch (err) {
      // If fetch fails, that's a real problem
      throw new Error(`HTTP server not responding: ${err}`);
    }

    // Clean shutdown
    child.kill("SIGTERM");
    await new Promise<void>((resolve) => {
      child.on("close", () => resolve());
      setTimeout(resolve, 3000);
    });

    daemonPid = undefined;
  }, 20_000);

  it("status shows bastion info or reports labd unreachable", async () => {
    const result = await runCli([
      "init", "bastion", "standalone", "status",
    ]);
    // Status queries labd — may show bastions (if labd running) or error (if not)
    const output = result.stdout + result.stderr;
    expect(output).toMatch(/HOSTNAME|Cannot reach labd|No bastions/i);
  });

  it("doctor runs without crashing", async () => {
    const result = await runCli(["doctor"]);
    // Doctor may report errors (no labd running) but should not crash
    expect(result.code).toBeLessThanOrEqual(1); // 0 = all ok, 1 = errors found
    expect(result.stdout).toContain("diagnostics");
  });
});