// Small, isolated persistence for AI Assistant settings — deliberately NOT
// folded into stores/settings-store.ts tonight. That store's export/import
// feature enumerates every field by hand; this is prototype-scope UI state
// (docs/AI-ASSISTANT-CONCEPT.md §12's P0/P5), and migrating it into the
// shared store belongs with whichever phase makes these settings real
// product config rather than a local-AI test harness.
export type AiProvider = 'local' | 'public';

export interface AiLocalSettings {
  provider: AiProvider | null;
  localBaseUrl: string;
  localModel: string | null;
  publicBaseUrl: string;
  publicModel: string;
  publicConsentAccepted: boolean;
}

const STORAGE_KEY = 'vncmail:ai:settings';

export const DEFAULT_AI_SETTINGS: AiLocalSettings = {
  provider: null,
  localBaseUrl: 'http://127.0.0.1:11434',
  localModel: null,
  publicBaseUrl: 'https://openrouter.ai/api/v1',
  publicModel: '',
  publicConsentAccepted: false,
};

export function loadAiSettings(): AiLocalSettings {
  if (typeof window === 'undefined') return { ...DEFAULT_AI_SETTINGS };
  try {
    const raw = window.localStorage.getItem(STORAGE_KEY);
    if (!raw) return { ...DEFAULT_AI_SETTINGS };
    return { ...DEFAULT_AI_SETTINGS, ...JSON.parse(raw) };
  } catch {
    return { ...DEFAULT_AI_SETTINGS };
  }
}

export function saveAiSettings(settings: AiLocalSettings): void {
  if (typeof window === 'undefined') return;
  window.localStorage.setItem(STORAGE_KEY, JSON.stringify(settings));
}