export type ToastLevel = "info" | "success" | "warn" | "error";
export interface ToastItem {
    readonly id: string;
    readonly message: string;
    readonly level: ToastLevel;
    readonly createdAt: number;
    readonly durationMs: number;
    readonly key?: string | undefined;
    readonly sticky?: boolean | undefined;
}
export interface ShowToastOptions {
    readonly level?: ToastLevel | undefined;
    readonly durationMs?: number | undefined;
    readonly key?: string | undefined;
    readonly sticky?: boolean | undefined;
}
export type ToastListener = () => void;
export declare const DEFAULT_TOAST_DURATION_MS = 5000;
export declare const TOAST_ENTER_MS = 200;
export declare const TOAST_EXIT_MS = 200;
export declare const MAX_TOAST_MESSAGE_CHARS = 400;
export declare function toastTotalLifetimeMs(holdMs: number): number;
export declare class ToastController {
    private items;
    private readonly timers;
    private readonly listeners;
    private seq;
    private disposed;
    getToasts(): readonly ToastItem[];
    subscribe(listener: ToastListener): () => void;
    show(message: string, options?: ShowToastOptions): string;
    private resetTimer;
    info(message: string, options?: Omit<ShowToastOptions, "level">): string;
    success(message: string, options?: Omit<ShowToastOptions, "level">): string;
    warn(message: string, options?: Omit<ShowToastOptions, "level">): string;
    error(message: string, options?: Omit<ShowToastOptions, "level">): string;
    dismiss(id: string): void;
    clear(): void;
    dispose(): void;
    private emit;
}