import { mkdtemp, readFile, rm, stat } from 'node:fs/promises';
import { join } from 'node:path';
import { tmpdir } from 'node:os';
import { generateKeyPairSync, verify, createPublicKey } from 'node:crypto';
import { describe, expect, it } from 'vitest';
import { writeCompanionReleaseBundle } from './releaseBundle.js';

describe('writeCompanionReleaseBundle', () => {
  it('writes manifest, launcher script, and README', async () => {
    const tempDir = await mkdtemp(join(tmpdir(), 'flynn-companion-release-'));
    const outputDir = join(tempDir, 'bundle');

    const result = await writeCompanionReleaseBundle({
      outputDir,
      manifest: {
        schemaVersion: 1,
        generatedAt: '2026-02-27T00:00:00.000Z',
        gateway: { url: 'ws://127.0.0.1:18800', token: 'token-123' },
        node: {
          nodeId: 'ios-node',
          role: 'companion',
          platform: 'ios',
          capabilities: ['ui.canvas', 'node.push.register'],
        },
        runtime: {
          heartbeatSeconds: 30,
          handoffTimeoutMs: 120000,
          autoReconnect: true,
        },
        status: {
          appVersion: '1.2.3',
          statusText: 'ready',
          powerSource: 'battery',
        },
        location: {
          latitude: 37.3349,
          longitude: -122.009,
          source: 'gps',
        },
        push: {
          provider: 'apns',
          token: '0123456789abcdef0123456789abcdef',
          topic: 'com.flynn.mobile',
          environment: 'production',
        },
      },
    });

    const manifestRaw = await readFile(result.manifestPath, 'utf8');
    const launcherRaw = await readFile(result.launcherPath, 'utf8');
    const readmeRaw = await readFile(result.readmePath, 'utf8');
    const checksumsRaw = await readFile(result.checksumsPath, 'utf8');
    const bundleManifestRaw = await readFile(result.releaseManifestPath, 'utf8');
    const launcherStat = await stat(result.launcherPath);

    expect(JSON.parse(manifestRaw)).toMatchObject({
      node: { nodeId: 'ios-node', platform: 'ios' },
      push: { provider: 'apns' },
    });
    expect(launcherRaw).toContain('exec flynn');
    expect(launcherRaw).toContain('--push-token');
    expect(launcherRaw).toContain('--latitude');
    expect(launcherRaw).toContain('sha256sum --check CHECKSUMS.sha256');
    expect(readmeRaw).toContain('Flynn Companion Release Bundle');
    expect(checksumsRaw).toContain('companion.bootstrap.json');
    expect(checksumsRaw).toContain('run-companion.sh');
    expect(checksumsRaw).toContain('README.md');
    expect(JSON.parse(bundleManifestRaw)).toMatchObject({
      schemaVersion: 1,
      bundle: { nodeId: 'ios-node', platform: 'ios' },
      files: expect.arrayContaining([
        expect.objectContaining({ path: 'CHECKSUMS.sha256' }),
      ]),
    });
    expect((launcherStat.mode & 0o111) !== 0).toBe(true);

    await rm(tempDir, { recursive: true, force: true });
  });

  it('writes signature artifact when signing key is provided', async () => {
    const tempDir = await mkdtemp(join(tmpdir(), 'flynn-companion-release-sign-'));
    const outputDir = join(tempDir, 'bundle');
    const keyPair = generateKeyPairSync('rsa', { modulusLength: 2048 });
    const privatePem = keyPair.privateKey.export({ type: 'pkcs8', format: 'pem' }).toString();
    const publicPem = keyPair.publicKey.export({ type: 'spki', format: 'pem' }).toString();

    const result = await writeCompanionReleaseBundle({
      outputDir,
      signingKeyPem: privatePem,
      signingKeyId: 'test-key',
      manifest: {
        schemaVersion: 1,
        generatedAt: '2026-02-27T00:00:00.000Z',
        gateway: { url: 'ws://127.0.0.1:18800' },
        node: {
          nodeId: 'macos-node',
          role: 'companion',
          platform: 'macos',
          capabilities: ['ui.canvas'],
        },
        runtime: {
          heartbeatSeconds: 30,
          handoffTimeoutMs: 120000,
          autoReconnect: true,
        },
      },
    });

    expect(result.signaturePath).toBe(`${outputDir}/CHECKSUMS.sha256.sig`);
    expect(result.releaseManifestPath).toBe(`${outputDir}/RELEASE_MANIFEST.json`);

    const checksumsRaw = await readFile(result.checksumsPath, 'utf8');
    const signatureRaw = await readFile(result.signaturePath!, 'utf8');
    const bundleManifestRaw = await readFile(result.releaseManifestPath, 'utf8');
    const signatureLine = signatureRaw.split('\n').find((line) => line.startsWith('signature='));
    expect(signatureLine).toBeTruthy();
    expect(signatureRaw).toContain('key_id=test-key');
    expect(JSON.parse(bundleManifestRaw)).toMatchObject({
      signature: {
        path: 'CHECKSUMS.sha256.sig',
        keyId: 'test-key',
      },
    });

    const signature = Buffer.from(String(signatureLine).replace('signature=', ''), 'base64');
    const verified = verify(
      'sha256',
      Buffer.from(checksumsRaw, 'utf8'),
      createPublicKey(publicPem),
      signature,
    );
    expect(verified).toBe(true);

    await rm(tempDir, { recursive: true, force: true });
  });
});