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

export type DashboardWidgetPlacementResponse = {
  instance_id: string;
  widget_id: string;
  size: DashboardWidgetSize;
  configuration: DashboardWidgetConfiguration;
};

export type DashboardLayoutResponse = {
  exists: boolean;
  view_id: string | null;
  layout_version: number;
  revision: number;
  placements: DashboardWidgetPlacementResponse[];
  known_widget_ids: string[];
  updated_at: string | null;
};

export type DashboardLayoutUpdate = {
  expected_revision: number | null;
  layout_version: 1;
  placements: DashboardWidgetPlacementResponse[];
  known_widget_ids: string[];
};

function layoutPath(viewId: string | null): string {
  return apiPath("/api/v1/dashboard/layout", { view_id: viewId });
}

export function fetchDashboardLayout(
  settings: ApiSettings,
  viewId: string | null
): Promise<DashboardLayoutResponse> {
  return apiFetch<DashboardLayoutResponse>(settings, layoutPath(viewId));
}

export function saveDashboardLayout(
  settings: ApiSettings,
  viewId: string | null,
  payload: DashboardLayoutUpdate
): Promise<DashboardLayoutResponse> {
  return apiFetch<DashboardLayoutResponse>(settings, layoutPath(viewId), {
    method: "PUT",
    body: JSON.stringify(payload)
  });
}