export function boardColumnsToKanbanValue<T extends { id: string | number }>(
  columns: Array<{ id: string; items: T[] }>,
): Record<string, T[]> {
  const value: Record<string, T[]> = {}
  for (const column of columns) {
    value[column.id] = column.items
  }
  return value
}

export function detectKanbanItemMove<T extends { id: string | number }>(
  prev: Record<string, T[]>,
  next: Record<string, T[]>,
): { itemId: string; fromColumnId: string; toColumnId: string } | null {
  for (const [fromColumnId, items] of Object.entries(prev)) {
    for (const item of items) {
      const itemId = String(item.id)
      const nextColumnId = Object.entries(next).find(([, colItems]) =>
        colItems.some((entry) => String(entry.id) === itemId),
      )?.[0]
      if (nextColumnId && nextColumnId !== fromColumnId) {
        return { itemId, fromColumnId, toColumnId: nextColumnId }
      }
    }
  }
  return null
}