/**
 * Dashboard API client functions.
 * All calls use credentials: 'include' for cookie-based auth.
 */

const API_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:3001';

export async function fetchLayout(): Promise<Record<string, unknown>> {
  const res = await fetch(`${API_URL}/dashboard/layout`, {
    credentials: 'include',
  });
  if (!res.ok) throw new Error('Failed to fetch layout');
  return res.json();
}

export async function saveLayout(
  layouts: Record<string, unknown>,
): Promise<void> {
  const res = await fetch(`${API_URL}/dashboard/layout`, {
    method: 'PUT',
    headers: { 'Content-Type': 'application/json' },
    credentials: 'include',
    body: JSON.stringify({ layouts }),
  });
  if (!res.ok) throw new Error('Failed to save layout');
}

export async function fetchWidgets(): Promise<
  Array<{ id: string; widgetType: string; config: Record<string, unknown> }>
> {
  const res = await fetch(`${API_URL}/dashboard/widgets`, {
    credentials: 'include',
  });
  if (!res.ok) throw new Error('Failed to fetch widgets');
  return res.json();
}

export async function addWidget(
  widgetType: string,
): Promise<{ id: string; widgetType: string; config: Record<string, unknown> }> {
  const res = await fetch(`${API_URL}/dashboard/widgets`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    credentials: 'include',
    body: JSON.stringify({ widgetType }),
  });
  if (!res.ok) throw new Error('Failed to add widget');
  return res.json();
}

export async function removeWidget(id: string): Promise<void> {
  const res = await fetch(`${API_URL}/dashboard/widgets/${id}`, {
    method: 'DELETE',
    credentials: 'include',
  });
  if (!res.ok) throw new Error('Failed to remove widget');
}

export async function updateWidgetConfig(
  id: string,
  config: Record<string, unknown>,
  signal?: AbortSignal,
): Promise<void> {
  const res = await fetch(`${API_URL}/dashboard/widgets/${id}/config`, {
    method: 'PATCH',
    headers: { 'Content-Type': 'application/json' },
    credentials: 'include',
    body: JSON.stringify({ config }),
    signal,
  });
  if (!res.ok) throw new Error('Failed to update widget config');
}

// --- Search Provider API (05-02) ---

export interface SearchProviderResponse {
  id: string;
  name: string;
  urlTemplate: string;
  isDefault: boolean;
  userId?: string | null;
}

export async function fetchSearchProviders(): Promise<SearchProviderResponse[]> {
  const res = await fetch(`${API_URL}/dashboard/search-providers`, {
    credentials: 'include',
  });
  if (!res.ok) throw new Error('Failed to fetch search providers');
  return res.json();
}

export async function addSearchProvider(payload: {
  name: string;
  urlTemplate: string;
}): Promise<SearchProviderResponse> {
  const res = await fetch(`${API_URL}/dashboard/search-providers`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    credentials: 'include',
    body: JSON.stringify(payload),
  });
  if (!res.ok) throw new Error('Failed to add search provider');
  return res.json();
}

export async function removeSearchProvider(id: string): Promise<void> {
  const res = await fetch(`${API_URL}/dashboard/search-providers/${id}`, {
    method: 'DELETE',
    credentials: 'include',
  });
  if (!res.ok) throw new Error('Failed to remove search provider');
}