import * as React from 'react';
import type { IStyle, ITheme } from '../../Styling';
import type { IStyleFunctionOrObject } from '../../Utilities';
/**
 * {@docCategory Image}
 */
export interface IImage {
}
/**
 * {@docCategory Image}
 */
export interface IImageProps extends React.ImgHTMLAttributes<HTMLImageElement>, React.RefAttributes<HTMLImageElement> {
    /**
     * Call to provide customized styling that will layer on top of the variant rules
     */
    styles?: IStyleFunctionOrObject<IImageStyleProps, IImageStyles>;
    /**
     * Theme provided by HOC.
     */
    theme?: ITheme;
    /**
     * Additional css class to apply to the Component
     * @defaultvalue undefined
     */
    className?: string;
    /**
     * If true, fades the image in when loaded.
     * @defaultvalue true
     */
    shouldFadeIn?: boolean;
    /**
     * If true, the image starts as visible and is hidden on error. Otherwise, the image is hidden until
     * it is successfully loaded. This disables shouldFadeIn.
     * @defaultvalue false;
     */
    shouldStartVisible?: boolean;
    /**
     * Used to determine how the image is scaled and cropped to fit the frame.
     *
     * @defaultvalue If both dimensions are provided, then the image is fit using `ImageFit.scale`.
     * Otherwise, the image won't be scaled or cropped.
     */
    imageFit?: ImageFit;
    /**
     * @deprecated Not used. Use `onLoadingStateChange` and re-render the Image with a different src.
     */
    errorSrc?: string;
    /**
     * If true, the image frame will expand to fill its parent container.
     */
    maximizeFrame?: boolean;
    /**
     * Optional callback method for when the image load state has changed.
     * The 'loadState' parameter indicates the current state of the Image.
     */
    onLoadingStateChange?: (loadState: ImageLoadState) => void;
    /**
     * Specifies the cover style to be used for this image. If not
     * specified, this will be dynamically calculated based on the
     * aspect ratio for the image.
     */
    coverStyle?: ImageCoverStyle;
    /**
     * Allows for browser-level image lazy-loading.
     */
    loading?: 'lazy' | 'eager';
}
/**
 * The possible methods that can be used to fit the image.
 * {@docCategory Image}
 */
export declare enum ImageFit {
    /**
     * The image is not scaled. The image is centered and cropped within the content box.
     */
    center = 0,
    /**
     * The image is scaled to maintain its aspect ratio while being fully contained within the frame. The image will
     * be centered horizontally and vertically within the frame. The space in the top and bottom or in the sides of
     * the frame will be empty depending on the difference in aspect ratio between the image and the frame.
     */
    contain = 1,
    /**
     * The image is scaled to maintain its aspect ratio while filling the frame. Portions of the image will be cropped
     * from the top and bottom, or the sides, depending on the difference in aspect ratio between the image and the frame.
     */
    cover = 2,
    /**
     * Neither the image nor the frame are scaled. If their sizes do not match, the image will either be cropped or the
     * frame will have empty space.
     */
    none = 3,
    /**
     * The image will be centered horizontally and vertically within the frame and maintains its aspect ratio. It will
     * behave as ImageFit.center if the image's natural height or width is less than the Image frame's height or width,
     * but if both natural height and width are larger than the frame it will behave as ImageFit.cover.
     */
    centerCover = 4,
    /**
     * The image will be centered horizontally and vertically within the frame and maintains its aspect ratio. It will
     * behave as ImageFit.center if the image's natural height and width is less than the Image frame's height and width,
     * but if either natural height or width are larger than the frame it will behave as ImageFit.contain.
     */
    centerContain = 5
}
/**
 * The cover style to be used on the image
 * {@docCategory Image}
 */
export declare enum ImageCoverStyle {
    /**
     * The image will be shown at 100% height of container and the width will be scaled accordingly
     */
    landscape = 0,
    /**
     * The image will be shown at 100% width of container and the height will be scaled accordingly
     */
    portrait = 1
}
/**
 * {@docCategory Image}
 */
export declare enum ImageLoadState {
    /**
     * The image has not yet been loaded, and there is no error yet.
     */
    notLoaded = 0,
    /**
     * The image has been loaded successfully.
     */
    loaded = 1,
    /**
     * An error has been encountered while loading the image.
     */
    error = 2,
    /**
     * @deprecated Not used. Use `onLoadingStateChange` and re-render the Image with a different src.
     */
    errorLoaded = 3
}
/**
 * {@docCategory Image}
 */
export interface IImageStyleProps {
    /**
     * Accept theme prop.
     */
    theme: ITheme;
    /**
     * Accept custom classNames
     */
    className?: string;
    /**
     * If true, the image frame will expand to fill its parent container.
     */
    maximizeFrame?: boolean;
    /**
     * If true, the image is loaded
     */
    isLoaded?: boolean;
    /**
     * If true, fades the image in when loaded.
     * @defaultvalue true
     */
    shouldFadeIn?: boolean;
    /**
     * If true, the image starts as visible and is hidden on error. Otherwise, the image is hidden until
     * it is successfully loaded. This disables shouldFadeIn.
     * @defaultvalue false;
     */
    shouldStartVisible?: boolean;
    /**
     * If true the image is coverStyle landscape instead of portrait
     */
    isLandscape?: boolean;
    /**
     * ImageFit booleans for center, cover, contain, centerContain, centerCover, none
     */
    isCenter?: boolean;
    isContain?: boolean;
    isCover?: boolean;
    isCenterContain?: boolean;
    isCenterCover?: boolean;
    isNone?: boolean;
    /**
     * if true image load is in error
     */
    isError?: boolean;
    /**
     * if true, imageFit is undefined
     */
    isNotImageFit?: boolean;
    /**
     * Image width value
     */
    width?: number | string;
    /**
     * Image height value
     */
    height?: number | string;
}
/**
 * {@docCategory Image}
 */
export interface IImageStyles {
    /**
     * Style set for the root div element.
     */
    root: IStyle;
    /**
     * Style set for the img element.
     */
    image: IStyle;
}