import type { InventoryItemPayload } from "@/types/inventory";

export function getErrorMessage(error: unknown) {
  if (typeof error === "object" && error !== null && "response" in error) {
    const response = (error as { response?: { data?: { detail?: string; message?: string } } }).response;
    return response?.data?.detail ?? response?.data?.message ?? "Aktion konnte nicht abgeschlossen werden";
  }
  return "Aktion konnte nicht abgeschlossen werden";
}

export function formatDate(value: string) {
  return new Intl.DateTimeFormat("de-DE", { dateStyle: "short", timeStyle: "short" }).format(new Date(value));
}

export function formatMoney(cents: number | null, currency = "EUR") {
  if (cents === null) {
    return "Keine Angabe";
  }
  return new Intl.NumberFormat("de-DE", { style: "currency", currency }).format(cents / 100);
}

export function euroToCents(value: string) {
  const normalized = value.trim().replace(",", ".");
  if (!normalized) {
    return null;
  }
  const amount = Number(normalized);
  if (!Number.isFinite(amount) || amount < 0) {
    return null;
  }
  return Math.round(amount * 100);
}

export function centsToEuroInput(cents: number | null) {
  if (cents === null) {
    return "";
  }
  return (cents / 100).toFixed(2).replace(".", ",");
}

export const emptyItemPayload: InventoryItemPayload = {
  sku: null,
  name: "",
  description: null,
  category_id: null,
  manufacturer: null,
  manufacturer_part_number: null,
  supplier_id: null,
  supplier_part_number: null,
  compatible_devices: null,
  location_id: null,
  quantity_on_hand: 0,
  quantity_reserved: 0,
  reorder_level: 0,
  unit: "Stk.",
  purchase_price_cents: null,
  selling_price_cents: null,
  currency: "EUR",
  tax_rate_percent: "19.00",
  notes: null,
  is_active: true,
};