/**
 * Smoke tests: secret-backend health honesty + value caching, against live mcpd.
 *
 * Covers the two behaviours that unit tests cannot prove, because both are
 * about what the REAL backend and the REAL CLI do together:
 *
 *   1. `mcpctl status` reports a probed verdict, not a hard-coded tick. The bug
 *      being guarded is that the verdict used to come from
 *      `tokenMeta.lastRotationError`, which a `kubernetes`-auth backend never
 *      writes — so the line was structurally incapable of going red.
 *   2. The value cache does not corrupt reads, and a delete really evicts.
 *
 * Deliberately does NOT take the real backend down. Simulating an outage
 * against shared infrastructure to satisfy a test would be worse than the bug.
 *
 * Target: mcpd direct (`--direct`), same skip-if-unreachable discipline as the
 * other smokes here.
 *
 * Run with: pnpm test:smoke
 */
import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import http from 'node:http';
import https from 'node:https';
import { execSync } from 'node:child_process';

const MCPD_URL = process.env.MCPD_URL ?? 'https://mcpctl.ad.itaz.eu';
const SECRET_NAME = `smoke-cache-${Date.now().toString(36)}`;

interface CliResult { code: number; stdout: string; stderr: string }

function run(args: string): CliResult {
  try {
    return { code: 0, stdout: execSync(`mcpctl --direct ${args}`, { encoding: 'utf-8', timeout: 30_000, stdio: ['ignore', 'pipe', 'pipe'] }).trim(), stderr: '' };
  } catch (err) {
    const e = err as { status?: number; stdout?: Buffer | string; stderr?: Buffer | string };
    return {
      code: e.status ?? 1,
      stdout: e.stdout ? String(e.stdout) : '',
      stderr: e.stderr ? String(e.stderr) : '',
    };
  }
}

function healthz(url: string, timeoutMs = 5000): Promise<boolean> {
  return new Promise((resolve) => {
    const parsed = new URL(`${url.replace(/\/$/, '')}/healthz`);
    const driver = parsed.protocol === 'https:' ? https : http;
    const req = driver.get(
      { hostname: parsed.hostname, port: parsed.port || (parsed.protocol === 'https:' ? 443 : 80), path: parsed.pathname, timeout: timeoutMs },
      (res) => { resolve((res.statusCode ?? 500) < 500); res.resume(); },
    );
    req.on('error', () => resolve(false));
    req.on('timeout', () => { req.destroy(); resolve(false); });
  });
}

let mcpdUp = false;

describe('secret resilience smoke', () => {
  beforeAll(async () => {
    mcpdUp = await healthz(MCPD_URL);
    if (!mcpdUp) {
      // eslint-disable-next-line no-console
      console.warn(`\n  ○ secret resilience smoke: skipped — ${MCPD_URL}/healthz unreachable. Set MCPD_URL to override.\n`);
    }
  }, 20_000);

  afterAll(() => {
    if (!mcpdUp) return;
    run(`delete secret ${SECRET_NAME}`);
  });

  it('status reports a probed backend verdict, not an unconditional tick', () => {
    if (!mcpdUp) return;
    const result = run('status');
    expect(result.code, result.stderr).toBe(0);
    const line = result.stdout.split('\n').find((l) => l.startsWith('Secrets:'));
    expect(line, 'status must include a Secrets: line').toBeDefined();
    // The verdict must be one the live probe can produce. A bare "name ✓" with
    // no qualifier is the OLD rendering and means the probe was not consulted.
    expect(line).toMatch(/reachable|degraded|unreachable|auth failed|unknown/);
  });

  it('reports live and ready separately per backend in JSON output', () => {
    if (!mcpdUp) return;
    const result = run('status -o json');
    expect(result.code, result.stderr).toBe(0);
    const parsed = JSON.parse(result.stdout) as {
      secretBackends?: Array<{ name: string; healthy: boolean; live: boolean | null; ready: boolean | null }>;
    };
    expect(parsed.secretBackends, 'JSON status must carry secretBackends').toBeDefined();
    for (const b of parsed.secretBackends ?? []) {
      // Both signals present and independent — not one boolean copied twice.
      expect(b, `backend ${b.name}`).toHaveProperty('live');
      expect(b, `backend ${b.name}`).toHaveProperty('ready');
      expect(b.healthy).toBe(b.live === true && b.ready === true);
    }
  });

  it('caching does not corrupt repeated reads, and delete evicts', () => {
    if (!mcpdUp) return;
    const created = run(`create secret ${SECRET_NAME} --data TOKEN=cache-probe-value`);
    expect(created.code, created.stderr).toBe(0);

    // Two reads back-to-back: the second is a cache hit. Both must agree.
    const first = run(`describe secret ${SECRET_NAME} --show-values`);
    const second = run(`describe secret ${SECRET_NAME} --show-values`);
    expect(first.code, first.stderr).toBe(0);
    expect(second.code, second.stderr).toBe(0);
    expect(first.stdout).toContain('cache-probe-value');
    expect(second.stdout).toContain('cache-probe-value');

    // Delete must evict — a cached value surviving a delete is exactly the
    // "resurrected revoked credential" failure the cache guards against.
    const deleted = run(`delete secret ${SECRET_NAME}`);
    expect(deleted.code, deleted.stderr).toBe(0);
    const after = run(`describe secret ${SECRET_NAME} --show-values`);
    expect(after.code, 'reading a deleted secret must fail, not serve cache').not.toBe(0);
  });

  it('exposes the per-backend health endpoint used by status', () => {
    if (!mcpdUp) return;
    const backends = run('get secretbackends -o json');
    expect(backends.code, backends.stderr).toBe(0);
    const rows = JSON.parse(backends.stdout) as Array<{ id: string; name: string }>;
    expect(rows.length).toBeGreaterThan(0);
    // describe must surface the same probe, for every backend type — the old
    // Token health block was gated on tokenMeta.rotatable and so rendered
    // nothing at all for kubernetes-auth backends.
    const described = run(`describe secretbackend ${rows[0]?.name ?? ''}`);
    expect(described.code, described.stderr).toBe(0);
  });
});