import { apiFetch, type ApiSettings, type DeltaDeletedItem } from "@govoplan/core-webui";

export type RoleSummary = {
  id: string;
  slug: string;
  name: string;
  permissions: string[];
};

export type GroupSummary = {
  id: string;
  slug: string;
  name: string;
  description?: string | null;
  is_active: boolean;
  member_count: number;
  member_ids: string[];
  roles: RoleSummary[];
};

export type UserAdminItem = {
  id: string;
  account_id: string;
  tenant_id: string;
  email: string;
  display_name?: string | null;
  is_active: boolean;
  groups: GroupSummary[];
  roles: RoleSummary[];
};

type DeltaResponseFields = {
  deleted: DeltaDeletedItem[];
  watermark?: string | null;
  has_more: boolean;
  full: boolean;
};

export type UserListDeltaResponse = { users: UserAdminItem[] } & DeltaResponseFields;
export type GroupListDeltaResponse = { groups: GroupSummary[] } & DeltaResponseFields;

function deltaSuffix(options: { since?: string | null; limit?: number } = {}): string {
  const params = new URLSearchParams();
  if (options.since) params.set("since", options.since);
  if (options.limit) params.set("limit", String(options.limit));
  const suffix = params.toString();
  return suffix ? `?${suffix}` : "";
}

export function fetchUsersDelta(settings: ApiSettings, options: { since?: string | null; limit?: number } = {}): Promise<UserListDeltaResponse> {
  return apiFetch(settings, `/api/v1/admin/users/delta${deltaSuffix(options)}`);
}

export function fetchGroupsDelta(settings: ApiSettings, options: { since?: string | null; limit?: number } = {}): Promise<GroupListDeltaResponse> {
  return apiFetch(settings, `/api/v1/admin/groups/delta${deltaSuffix(options)}`);
}