export interface PrivacySettings {
  telemetry_enabled: boolean;
  email_enabled: boolean;
  news_feed_enabled?: boolean;
  retention_days: number;
  attribution_enabled: boolean;
  attribution_available?: boolean;
}

export const NEWS_FEED_CONSENT_EVENT = 'llmagnet:news-feed-consent';

type AnalyticsHolder = { analyticsData?: { newsFeedConsent?: boolean } };

const NEWS_FEED_CONSENT_GLOBALS = [
  'llmagnetDashboardData',
  'llmagnetPagesData',
  'llmagnetBotAnalyticsData',
  'llmagnetProductsData',
  'llmagnetReportsData',
  'llmagnetContentSettingsData',
  'llmagnetSchemaData',
  'llmagnetAgentReadyData',
  'llmagnetUcpData',
  'llmagnetConnectionsData',
  'llmagnetMcpData',
  'llmagnetSystemInfoData',
  'llmagnetAnalyticsData',
] as const;

export function readNewsFeedConsent(): boolean {
  if (typeof window === 'undefined') {
    return false;
  }
  const w = window as Window & Record<string, AnalyticsHolder | undefined>;
  return NEWS_FEED_CONSENT_GLOBALS.some((key) => w[key]?.analyticsData?.newsFeedConsent === true);
}

export function persistNewsFeedConsent(enabled: boolean): void {
  if (typeof window === 'undefined') {
    return;
  }
  const w = window as Window & Record<string, AnalyticsHolder | undefined>;
  for (const key of NEWS_FEED_CONSENT_GLOBALS) {
    const holder = w[key];
    if (holder?.analyticsData) {
      holder.analyticsData.newsFeedConsent = enabled;
    }
  }
  window.dispatchEvent(new CustomEvent(NEWS_FEED_CONSENT_EVENT, { detail: { enabled } }));
}

function getRestConfig(): { root: string; nonce: string } {
  const root = window.wpApiSettings?.root?.replace(/\/$/, '') || '';
  const nonce = window.wpApiSettings?.nonce || '';
  return { root, nonce };
}

export async function fetchPrivacySettings(): Promise<PrivacySettings> {
  const { root, nonce } = getRestConfig();
  if (!root || !nonce) {
    throw new Error('REST API not configured');
  }

  const res = await fetch(`${root}/llm-analytics/v1/privacy/settings`, {
    headers: { 'X-WP-Nonce': nonce },
    credentials: 'same-origin',
  });

  if (!res.ok) {
    throw new Error(`HTTP ${res.status}`);
  }

  return (await res.json()) as PrivacySettings;
}

export type PrivacySettingsUpdate = Partial<
  Pick<
    PrivacySettings,
    'telemetry_enabled' | 'email_enabled' | 'news_feed_enabled' | 'attribution_enabled' | 'retention_days'
  >
>;

export async function updatePrivacySettings(
  partial: PrivacySettingsUpdate,
): Promise<PrivacySettings & { success: boolean }> {
  const { root, nonce } = getRestConfig();
  if (!root || !nonce) {
    throw new Error('REST API not configured');
  }

  const res = await fetch(`${root}/llm-analytics/v1/privacy/settings`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-WP-Nonce': nonce,
    },
    credentials: 'same-origin',
    body: JSON.stringify(partial),
  });

  if (!res.ok) {
    throw new Error(`HTTP ${res.status}`);
  }

  return (await res.json()) as PrivacySettings & { success: boolean };
}