import type { Item } from '../../src/lib/types';

let counter = 0;

function nextId(): string {
  counter++;
  const chars = '23456789abcdefghjkmnpqrstuvwxyz';
  let id = '';
  let n = counter;
  for (let i = 0; i < 7; i++) {
    id += chars[n % chars.length];
    n = Math.floor(n / chars.length);
  }
  return id;
}

export interface ItemOverrides extends Partial<Item> {}

export function buildItem(overrides: ItemOverrides = {}): Item {
  const shortId = overrides.shortId ?? nextId();
  const now = new Date().toISOString();
  return {
    shortId,
    name: `Test Item ${shortId}`,
    description: '',
    category: '',
    brand: '',
    serialNumber: '',
    color: '',
    purchaseDate: null,
    itemType: 'durable',
    currentQuantity: null,
    originalQuantity: null,
    quantityUnit: null,
    lowThreshold: null,
    expiryDate: null,
    barcodeFormat: 'qr',
    barcodeUri: `https://haus.toph.so/${shortId}`,
    photoIds: [],
    lastSeenAt: null,
    lastSeenTimestamp: null,
    lastUsedAt: null,
    supposedToBeAt: null,
    locationConfidence: 'unknown',
    custodyState: 'checked-in',
    checkedOutSince: null,
    checkedOutReason: null,
    checkedOutFrom: null,
    checkedOutTo: null,
    checkedOutNote: null,
    storageTier: 'warm',
    storageContainerId: null,
    storageContainerLabel: null,
    labelPrinted: false,
    labelPrintedAt: null,
    labelBatchId: null,
    createdAt: now,
    updatedAt: now,
    tags: [],
    createdBy: null,
    ...overrides,
  };
}

export function buildCheckedOutItem(overrides: ItemOverrides = {}): Item {
  const tenDaysAgo = new Date(Date.now() - 10 * 86400000).toISOString();
  return buildItem({
    custodyState: 'checked-out',
    checkedOutSince: tenDaysAgo,
    checkedOutReason: 'in-use',
    checkedOutFrom: 'kueche',
    checkedOutTo: null,
    checkedOutNote: '',
    ...overrides,
  });
}

export function buildConsumableItem(overrides: ItemOverrides = {}): Item {
  return buildItem({
    itemType: 'consumable',
    currentQuantity: 3,
    originalQuantity: 10,
    quantityUnit: 'pcs',
    lowThreshold: 5,
    ...overrides,
  });
}

export function buildItemAtLocation(locationId: string, overrides: ItemOverrides = {}): Item {
  const now = new Date().toISOString();
  return buildItem({
    lastSeenAt: locationId,
    lastSeenTimestamp: now,
    supposedToBeAt: locationId,
    locationConfidence: 'confirmed',
    ...overrides,
  });
}

export function resetCounter() {
  counter = 0;
}