/**
 * WorkstreamSwitcher component.
 *
 * Displays the current branch in a trigger button and opens a dropdown that
 * lists all branches with search filtering. Provides an inline "New workstream"
 * create form in the footer when `onCreateBranch` is supplied.
 *
 * The dropdown uses createPortal + position:fixed so it escapes any
 * overflow:hidden or z-index constraints on ancestor elements.
 */
import React from 'react';
import type { Branch } from '@pantheon-systems/css-client';
export interface WorkstreamSwitcherProps {
    branches: Branch[];
    currentBranch: Branch | null;
    onSwitch: (branchId: string) => void;
    /**
     * Called when the user creates a new workstream branch. When omitted, the
     * "New workstream" footer is not rendered at all.
     */
    onCreateBranch?: (name: string) => Promise<void>;
    /**
     * Called every time the dropdown opens (trigger click or `openCreateForm`).
     * `branches` is otherwise only refreshed once on mount, so a workstream
     * created elsewhere (another tab, the dashboard, or an API call) doesn't
     * show up here until something else happens to refetch it. Wire this to a
     * refetch of the branch list; errors are the caller's responsibility, this
     * component doesn't await it.
     */
    onOpen?: () => void;
}
export interface WorkstreamSwitcherHandle {
    /** Opens the dropdown with the "New workstream" form showing. No-op without `onCreateBranch`. */
    openCreateForm: () => void;
}
export declare const WorkstreamSwitcher: React.ForwardRefExoticComponent<WorkstreamSwitcherProps & React.RefAttributes<WorkstreamSwitcherHandle>>;