// ---------------------------------------------------------------------------
// CopilotAdapter — Phase 2 stub
// Spec reference: §3.4
// ---------------------------------------------------------------------------

import type { Provider } from '../task/task-state.js';
import type { TaskHandle } from '../task/task-handle.js';
import type { ProviderCapabilities } from './provider-capabilities.js';
import { COPILOT_CAPABILITIES } from './provider-capabilities.js';
import {
  BaseProviderAdapter,
  type ProviderSpawnOptions,
  type AvailabilityResult,
} from './base-adapter.js';

export class CopilotAdapter extends BaseProviderAdapter {
  readonly id: Provider = 'copilot';
  readonly displayName = 'Copilot';

  checkAvailability(): AvailabilityResult {
    return { available: false, reason: 'Phase 2 — not yet implemented' };
  }

  getCapabilities(): ProviderCapabilities {
    return COPILOT_CAPABILITIES;
  }

  getStats(): Record<string, unknown> {
    return {};
  }

  protected async executeSession(
    _handle: TaskHandle,
    _prompt: string,
    _signal: AbortSignal,
    _options: ProviderSpawnOptions,
  ): Promise<void> {
    throw new Error('Not implemented — Phase 2');
  }
}