package realdebrid

func indexFromEnd(subIndex int, pageNumber int, pageSize int, totalElements int) int {
	// Adjust pageNumber for 1-based index
	adjustedPageNumber := pageNumber - 1

	// Calculate the overall index in the array
	overallIndex := (adjustedPageNumber * pageSize) + subIndex

	// Calculate the index from the end
	indexFromEnd := totalElements - 1 - overallIndex

	return indexFromEnd
}