import { describe, it, expect } from 'vitest';
import { makeWorkersTools } from '../../src/tools/workers.js';

describe('worker.register (stub)', () => {
  const tool = makeWorkersTools().find((t) => t.name === 'worker.register')!;

  it('exists and documents itself as a stub', () => {
    expect(tool).toBeDefined();
    expect(tool.description.toLowerCase()).toContain('stub');
  });

  it('returns a 501 not-implemented verdict for valid input', async () => {
    const r = await tool.handler({
      machine: 'win11',
      runtime: 'claude-opus',
      capabilities: ['needs-db'],
    });
    expect(r.isError).toBe(true);
    const body = JSON.parse(r.content[0].text);
    expect(body.ok).toBe(false);
    expect(body.reason).toBe('not-implemented');
    expect(typeof body.hint).toBe('string');
    expect(body.hint.length).toBeGreaterThan(0);
  });

  it('keeps the verdict for optional endpoint + confirm (no side-effects)', async () => {
    const r = await tool.handler({
      machine: 'win11',
      runtime: 'claude-opus',
      capabilities: [],
      endpoint: 'https://node/agent',
      confirm: true,
    });
    const body = JSON.parse(r.content[0].text);
    expect(body.reason).toBe('not-implemented');
  });

  it('rejects malformed input — missing machine', async () => {
    await expect(
      tool.handler({ runtime: 'claude-opus', capabilities: [] }),
    ).rejects.toThrow();
  });

  it('rejects malformed input — capabilities not an array', async () => {
    await expect(
      tool.handler({ machine: 'm', runtime: 'r', capabilities: 'nope' }),
    ).rejects.toThrow();
  });
});