import { ToastPosition } from '../components/toast';
export type ToastVariant = 'neutral' | 'success' | 'warning' | 'error' | 'info';
/** Visual treatment: `'pill'` (default, compact single-line) or `'card'` (richer
 *  rounded card with an optional description line). */
export type ToastAppearance = 'pill' | 'card';
export interface ToastConfig {
    stack?: 'expanded' | 'collapsed';
    position?: ToastPosition;
    max?: number;
    /** Default appearance for imperatively-raised toasts. Defaults to `'pill'`. */
    appearance?: ToastAppearance;
    /** Default high-contrast inverse treatment for imperatively-raised toasts.
     *  Defaults to `false`. */
    inverse?: boolean;
}
/**
 * Configure the imperative `toast()` singleton — call once at app start.
 * `toast.success('…')` has no element to set a prop on, so this is how you opt
 * the auto-mounted region into collapsed stacking / a position / a max. Updates
 * any already-mounted regions too, so call order doesn't matter.
 */
export declare function configureToasts(config: ToastConfig): void;
/** An action button rendered inside the toast. Returning `false` from
 *  `onAction` keeps the toast open (e.g. to show a follow-up); any other
 *  return value dismisses it. */
export interface ToastAction {
    label: string;
    onAction: () => void | false;
}
export interface ToastItem {
    id: string;
    message: string;
    variant?: ToastVariant;
    /** Visual treatment: `'pill'` (default, compact single-line) or `'card'` (richer
     *  rounded card with an optional description line). */
    appearance?: ToastAppearance;
    /** High-contrast inverse surface — works on either appearance, popping in light
     *  AND dark. Defaults to `false`. */
    inverse?: boolean;
    /** Secondary line shown below the message in the `'card'` appearance. The
     *  `'pill'` appearance ignores it. */
    description?: string;
    action?: ToastAction;
    /** Auto-dismiss delay in ms. `0` = sticky (never auto-dismisses). When an
     *  `action` is present the effective floor is 4000ms so it stays long enough
     *  to act on. Defaults to 2000ms. */
    duration?: number;
    /** Whether the × close affordance is shown. Defaults to `true`. */
    dismissible?: boolean;
    /** Container to scope this toast WITHIN — it floats anchored to that element's
     *  bounds instead of the viewport. Omit for a global, viewport-anchored toast.
     *  The chat targets itself by default so its copy/feedback toasts stay in-chat. */
    target?: HTMLElement;
}
/** Options accepted by `toast()` — everything but the message. Pass `id` to
 *  update an existing toast in place. */
export interface ToastOptions {
    id?: string;
    variant?: ToastVariant;
    /** Visual treatment: `'pill'` (default) or `'card'`. Falls back to the value set
     *  via `configureToasts`, then `'pill'`. */
    appearance?: ToastAppearance;
    /** High-contrast inverse surface. Falls back to `configureToasts`, then `false`. */
    inverse?: boolean;
    /** Secondary line shown below the message in the `'card'` appearance. */
    description?: string;
    action?: ToastAction;
    duration?: number;
    dismissible?: boolean;
    /** Scope this toast to a container's bounds (e.g. a chat) instead of the
     *  viewport. Omit for a global, viewport-anchored toast. */
    target?: HTMLElement;
}
/** Handle returned from `toast()` for imperative control. */
export interface ToastHandle {
    id: string;
    dismiss: () => void;
    update: (patch: Partial<Omit<ToastItem, 'id'>>) => void;
}
/** Default auto-dismiss delay. Long enough to read + reach before it leaves. */
export declare const DEFAULT_TOAST_DURATION = 5000;
/** Minimum auto-dismiss delay when the toast carries an action (e.g. Undo) — it
 *  has to stay up long enough to actually act on. */
export declare const ACTION_TOAST_FLOOR = 7000;
/** The live toast list (reactive). The region facade binds to this. */
export declare function getToasts(): ToastItem[];
/** Resolve the effective duration, applying the action floor. */
declare function resolveDuration(item: Pick<ToastItem, 'duration' | 'action'>): number;
export declare function ensureMounted(target?: HTMLElement | null): HTMLElement | undefined;
/** Test-only: whether `ensureMounted` has run. */
export declare function isToastRegionMounted(): boolean;
export interface ToastFn {
    (message: string, opts?: ToastOptions): ToastHandle;
    /** Raise a success (green check) toast. */
    success: (message: string, opts?: ToastOptions) => ToastHandle;
    /** Raise a warning (amber) toast — e.g. an agent needs your input. */
    warning: (message: string, opts?: ToastOptions) => ToastHandle;
    /** Raise an error (destructive/red) toast — e.g. an agent failed. */
    error: (message: string, opts?: ToastOptions) => ToastHandle;
    /** Raise an info (blue) toast. */
    info: (message: string, opts?: ToastOptions) => ToastHandle;
    /** Dismiss a toast by id. */
    dismiss: (id: string) => void;
    /** Dismiss every active toast. */
    clear: () => void;
}
/**
 * Raise a transient toast. Returns a `{ id, dismiss, update }` handle.
 *
 * ```ts
 * toast('Copied to clipboard');
 * toast.success('Saved');
 * const t = toast('Working…', { duration: 0 });
 * t.update({ message: 'Done', variant: 'success', duration: 2000 });
 * ```
 */
export declare const toast: ToastFn;
export { resolveDuration };