// ---------------------------------------------------------------------------
// Notifications API client  (client-side)
// ---------------------------------------------------------------------------

import { apiFetch } from './client';

// ---------------------------------------------------------------------------
// Request / response shapes
// TODO: import from @/lib/types once the shared types package is finalised
// ---------------------------------------------------------------------------

export interface NotificationResponse {
  id: number;
  title: string;
  body: string;
  notification_type: string;
  is_read: boolean;
  data?: Record<string, unknown>;
  created_at: string;
}

export interface NotificationListResponse {
  count: number;
  results: NotificationResponse[];
}

export interface UnreadCountResponse {
  unread_count: number;
}

export interface NotificationPreferencesResponse {
  task_reminders: boolean;
  task_completions: boolean;
  residence_updates: boolean;
  share_notifications: boolean;
  marketing: boolean;
}

export interface UpdatePreferencesRequest {
  task_reminders?: boolean;
  task_completions?: boolean;
  residence_updates?: boolean;
  share_notifications?: boolean;
  marketing?: boolean;
}

export interface RegisterDeviceRequest {
  registration_id: string;
  platform: 'ios' | 'android' | 'web';
  device_name?: string;
}

export interface DeviceResponse {
  id: number;
  registration_id: string;
  platform: string;
  device_name: string;
  is_active: boolean;
  created_at: string;
}

export interface UnregisterDeviceRequest {
  registration_id: string;
  platform?: string;
}

export interface MessageResponse {
  message: string;
}

// ---------------------------------------------------------------------------
// API functions
// ---------------------------------------------------------------------------

/** List notifications with optional pagination. */
export function listNotifications(
  limit?: number,
  offset?: number,
): Promise<NotificationListResponse> {
  const params = new URLSearchParams();
  if (limit != null) params.set('limit', String(limit));
  if (offset != null) params.set('offset', String(offset));
  const qs = params.toString();
  return apiFetch<NotificationListResponse>(
    `/notifications/${qs ? `?${qs}` : ''}`,
  );
}

/** Get unread notification count. */
export function getUnreadCount(): Promise<UnreadCountResponse> {
  return apiFetch<UnreadCountResponse>('/notifications/unread-count/');
}

/** Mark a single notification as read. */
export function markAsRead(id: number): Promise<MessageResponse> {
  return apiFetch<MessageResponse>(`/notifications/${id}/read/`, {
    method: 'POST',
  });
}

/** Mark all notifications as read. */
export function markAllAsRead(): Promise<MessageResponse> {
  return apiFetch<MessageResponse>('/notifications/mark-all-read/', {
    method: 'POST',
  });
}

/** Get notification preferences. */
export function getPreferences(): Promise<NotificationPreferencesResponse> {
  return apiFetch<NotificationPreferencesResponse>(
    '/notifications/preferences/',
  );
}

/** Update notification preferences. */
export function updatePreferences(
  data: UpdatePreferencesRequest,
): Promise<NotificationPreferencesResponse> {
  return apiFetch<NotificationPreferencesResponse>(
    '/notifications/preferences/',
    {
      method: 'PUT',
      body: JSON.stringify(data),
    },
  );
}

/** Register a push notification device. */
export function registerDevice(
  data: RegisterDeviceRequest,
): Promise<DeviceResponse> {
  return apiFetch<DeviceResponse>('/notifications/devices/', {
    method: 'POST',
    body: JSON.stringify(data),
  });
}

/** List registered devices. */
export function listDevices(): Promise<DeviceResponse[]> {
  return apiFetch<DeviceResponse[]>('/notifications/devices/');
}

/** Unregister a push notification device by registration ID. */
export function unregisterDevice(
  data: UnregisterDeviceRequest,
): Promise<MessageResponse> {
  return apiFetch<MessageResponse>('/notifications/devices/unregister/', {
    method: 'POST',
    body: JSON.stringify(data),
  });
}

/** Delete a device by ID. */
export function deleteDevice(
  id: number,
  platform?: string,
): Promise<MessageResponse> {
  const qs = platform ? `?platform=${platform}` : '';
  return apiFetch<MessageResponse>(`/notifications/devices/${id}/${qs}`, {
    method: 'DELETE',
  });
}