import React from "react";
import type { ToastToDismiss } from ".";
import type { PromiseT, ToastT, ToastTypes } from "./toast";
/**
 * Type definition for toast titles
 * Allows for both static React nodes and functions that return React nodes
 */
type titleT = (() => React.ReactNode) | React.ReactNode;
/**
 * Extended promise result type for complex toast results
 * Can be either a direct result object or a function that takes data and returns a result
 *
 * @template Data - The type of data that the promise resolves with
 */
type PromiseTExtendedResult<Data = unknown> = PromiseIExtendedResult | ((data: Data) => PromiseIExtendedResult | Promise<PromiseIExtendedResult>);
/**
 * Promise result type for toast content
 * Can be a string, React node, or a function that takes data and returns content
 *
 * @template Data - The type of data that the promise resolves with
 */
type PromiseTResult<Data = unknown> = string | React.ReactNode | ((data: Data) => React.ReactNode | string | Promise<React.ReactNode | string>);
/**
 * Promise external toast type without description
 * Used to allow overriding all properties except description
 */
type PromiseExternalToast = Omit<ExternalToast, "description">;
/**
 * Configuration for toast notifications that display promise states
 */
type PromiseData<ToastData = unknown> = PromiseExternalToast & {
    /**
     * Content to display while the promise is loading
     */
    loading?: string | React.ReactNode;
    /**
     * Content to display when the promise resolves successfully
     */
    success?: PromiseTResult<ToastData> | PromiseTExtendedResult<ToastData>;
    /**
     * Content to display when the promise rejects
     */
    error?: PromiseTResult | PromiseTExtendedResult;
    /**
     * Additional description content
     */
    description?: PromiseTResult;
    /**
     * Function to execute after the promise settles
     */
    finally?: () => void | Promise<void>;
};
/**
 * External toast configuration type
 * Represents the user-facing API for creating toasts with optional ID
 */
type ExternalToast = Omit<ToastT, "id" | "type" | "title" | "jsx" | "delete" | "promise"> & {
    id?: number | string;
};
/**
 * Interface for extended promise results
 * Used to provide additional configuration options along with the message
 *
 * @property {React.ReactNode} message - The main content to display
 */
interface PromiseIExtendedResult extends ExternalToast {
    message: React.ReactNode;
}
/**
 * Observer class for managing toast notifications
 * Implements the observer pattern to allow components to subscribe to toast updates
 */
declare class Observer {
    /**
     * List of functions that will be called when a toast is added or dismissed
     */
    subscribers: Array<(toastData: ExternalToast | ToastToDismiss) => void>;
    /**
     * Collection of all toasts, including those that have been dismissed
     */
    toasts: Array<ToastT | ToastToDismiss>;
    /**
     * Set of IDs for toasts that have been dismissed
     */
    dismissedToasts: Set<string | number>;
    /**
     * Add a flag to track if a Toaster is mounted
     */
    isToasterMounted: boolean;
    /**
     * Creates a new Observer instance and initializes collections
     */
    constructor();
    /**
     * Mark a Toaster as mounted
     */
    markToasterMounted: () => void;
    /**
     * Mark a Toaster as unmounted
     */
    markToasterUnmounted: () => void;
    /**
     * Check if a Toaster is mounted before executing toast functions
     */
    checkToasterMounted: () => boolean;
    /**
     * Registers a subscriber function to be called when toasts are added or dismissed
     */
    subscribe: (subscriber: (toastData: ExternalToast | ToastToDismiss) => void) => () => void;
    /**
     * Publishes a toast notification to all subscribers
     */
    publish: (data: ToastT) => void;
    /**
     * Adds a toast to the collection and publishes it to all subscribers
     */
    addToast: (data: ToastT) => void;
    /**
     * Creates a new toast or updates an existing one with the same ID
     */
    create: (data: ExternalToast & {
        message?: titleT;
        type?: ToastTypes;
        promise?: PromiseT;
        jsx?: React.ReactElement;
    }) => string | number;
    /**
     * Dismisses a toast by ID or all toasts if no ID is provided
     */
    dismiss: (id?: number | string) => string | number | undefined;
    message: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    error: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    success: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    info: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    warning: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    loading: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    /**
     * Creates a toast that updates based on the state of a promise
     */
    promise: <ToastData>(promise: PromiseT<ToastData>, data?: PromiseData<ToastData>) => (string & {
        unwrap: () => Promise<ToastData>;
    }) | (number & {
        unwrap: () => Promise<ToastData>;
    }) | {
        unwrap: () => Promise<ToastData>;
    } | undefined;
    custom: (jsx: (id: number | string) => React.ReactElement, data?: ExternalToast) => string | number;
    /**
     * Gets all toasts that haven't been dismissed
     */
    getActiveToasts: () => (ToastT | ToastToDismiss)[];
}
/**
 * Singleton instance of the Observer class to manage toast state globally
 */
export declare const ToastState: Observer;
/**
 * Main toast API that combines all toast creation methods and utilities
 * We use `Object.assign` to maintain the correct types as we would lose them otherwise
 */
export declare const toast: ((message: titleT, data?: ExternalToast) => string | number | undefined) & {
    custom: (jsx: (id: number | string) => React.ReactElement, data?: ExternalToast) => string | number;
    dismiss: (id?: number | string) => string | number | undefined;
    error: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    info: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    loading: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    message: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    promise: <ToastData>(promise: PromiseT<ToastData>, data?: PromiseData<ToastData> | undefined) => (string & {
        unwrap: () => Promise<ToastData>;
    }) | (number & {
        unwrap: () => Promise<ToastData>;
    }) | {
        unwrap: () => Promise<ToastData>;
    } | undefined;
    success: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
    warning: (message: titleT | React.ReactNode, data?: ExternalToast) => string | number;
} & {
    getHistory: () => (ToastT | ToastToDismiss)[];
    getToasts: () => (ToastT | ToastToDismiss)[];
};
export type { ExternalToast };