package store

import "strconv"

// PaginateOffset returns a page from a pre-sorted slice using numeric string cursors (same scheme as ListRevisions).
func PaginateOffset[T any](all []T, cursor string, limit int) (page []T, nextCursor string, hasMore bool) {
	if limit <= 0 {
		limit = 50
	}
	off := 0
	if cursor != "" {
		if n, err := strconv.Atoi(cursor); err == nil && n >= 0 {
			off = n
		}
	}
	if off > len(all) {
		off = len(all)
	}
	end := off + limit
	if end > len(all) {
		end = len(all)
	}
	page = all[off:end]
	if end < len(all) {
		nextCursor = strconv.Itoa(end)
		hasMore = true
	}
	return page, nextCursor, hasMore
}