import { Definition, Node } from '@yozora/ast';
import { AstMutateApi } from '@yozora/gatsby-transformer';

/**
 * Options for this plugin.
 */
interface IGatsbyYozoraImagesOptions {
    /**
     * Set the background color of the image to match the background image of your design.
     *
     * Note:
     *    - set this option to transparent for a transparent image background.
     *    - set this option to none to completely remove the image background.
     */
    backgroundColor?: string;
    /**
     * Set the browser’s native decoding attribute.
     * @default 'async'
     */
    decoding?: 'sync' | 'async' | 'auto';
    /**
     * Remove background image and its’ inline style. Useful to prevent Stylesheet too long error on AMP.
     */
    disableBgImage?: boolean;
    /**
     * Images containing transparent pixels around the edges results in images with blurry edges.
     * As a result, these images do not work well with the “blur up” technique used in this plugin.
     * As a workaround to disable background images with blurry edges on images containing transparent
     * pixels, enable this setting.
     */
    disableBgImageOnAlpha?: boolean;
    /**
     * Set the browser's native lazy loading attribute.
     * @default 'lazy'
     */
    loading?: 'lazy' | 'eager' | 'auto';
    /**
     * The maxWidth in pixels of the div where the markdown will be displayed.
     * This value is used when deciding what the width of the various responsive thumbnails should be.
     * @default 650
     */
    maxWidth?: number;
    /**
     * Preset definitions.
     */
    presetDefinitions?: ReadonlyArray<Definition>;
}

/**
 * Return a promise, so provide a chance to waiting for the task finished before moving forward.
 *
 * @param api
 * @param pluginOptions
 * @returns
 */
declare function mutateYozoraAst(api: AstMutateApi, pluginOptions?: IGatsbyYozoraImagesOptions): Promise<Node[]>;

export { mutateYozoraAst as default };