import { api } from './client';

export interface DashboardDeviceRow {
  deviceId: string;
  deviceName: string;
  siteName: string | null;
  kwh: number;
  peakKw: number | null;
  lastSeen: string | null;
  cost: number | null;
}

export interface DashboardChartPoint {
  time: string;
  totalKw: number;
}

export interface DashboardSummary {
  totalKwh: number;
  currentActivePowerKw: number | null;
  activeDeviceCount: number;
  totalCost: number | null;
  devices: DashboardDeviceRow[];
  chart: DashboardChartPoint[];
}

export async function fetchDashboardSummary(
  fromUtc: string,
  toUtc: string,
): Promise<DashboardSummary> {
  const { data } = await api.get<DashboardSummary>('/dashboard/summary', {
    params: { from: fromUtc, to: toUtc },
  });
  return data;
}

// Trigger a browser download. Same-origin → cookie travels automatically.
// We use window.location rather than axios+blob since the file is the user's
// intent (a download), not an in-page resource we need to manipulate.
export function downloadDashboardSummaryXlsx(fromUtc: string, toUtc: string) {
  const params = new URLSearchParams({ from: fromUtc, to: toUtc });
  window.location.href = `/api/dashboard/summary/export.xlsx?${params.toString()}`;
}

export function downloadRawMeasurementsXlsx(fromUtc: string, toUtc: string, rowCap = 100_000) {
  const params = new URLSearchParams({ from: fromUtc, to: toUtc, rowCap: String(rowCap) });
  window.location.href = `/api/dashboard/measurements/export.xlsx?${params.toString()}`;
}

export function downloadFleetDashboardXlsx() {
  window.location.href = `/api/fleet/dashboard/export.xlsx`;
}

export function downloadFleetCustomerCostXlsx(customerId: string, fromUtc: string, toUtc: string) {
  const params = new URLSearchParams({ from: fromUtc, to: toUtc });
  window.location.href = `/api/fleet/customers/${encodeURIComponent(customerId)}/cost/export.xlsx?${params.toString()}`;
}