import { Page } from 'vuepress';
import { PageFrontmatter } from 'vuepress/shared';
import { WatermarkOptions } from 'watermark-js-plus';
import { Plugin } from 'vuepress/core';

type WatermarkPureOptions = Omit<Partial<WatermarkOptions>, 'extraDrawFunc' | 'onBeforeDestroy' | 'onDestroyed' | 'onObserveError' | 'onSuccess' | 'parent'> & {
    /**
     * Watermark parent selector
     *
     * 水印父元素选择器
     *
     * @default 'body'
     */
    parent?: 'body' | (string & {
        __z_ignore?: never;
    });
};
interface WatermarkPluginFrontmatter extends PageFrontmatter {
    watermark?: WatermarkPureOptions | boolean;
}

interface WatermarkPluginOptions {
    /**
     * Specify which pages need to have watermarks added.
     *
     * Pages with `true` value will have watermarks added.
     *
     * 指定哪些页面需要添加水印。
     *
     * 拥有 `true` 值的页面将会被添加水印。
     *
     * @default true
     */
    enabled?: boolean | ((page: Page) => boolean);
    /**
     * Watermark options
     *
     * 水印配置选项
     *
     * @see [watermark-js-plus](https://zhensherlock.github.io/watermark-js-plus/config/)
     */
    watermarkOptions?: WatermarkPureOptions;
}

/**
 * VuePress watermark plugin
 *
 * VuePress 水印插件
 *
 * @param options - Plugin options / 插件选项
 *
 * @example
 * ```ts
 * import { watermarkPlugin } from '@vuepress/plugin-watermark'
 *
 * export default {
 *   plugins: [
 *     watermarkPlugin({
 *       enabled: true,
 *       watermarkOptions: {
 *         content: 'My Site',
 *         fontColor: '#666',
 *         opacity: 0.3,
 *       },
 *     }),
 *   ],
 * }
 * ```
 */
declare const watermarkPlugin: ({ enabled, ...options }?: WatermarkPluginOptions) => Plugin;

export { watermarkPlugin };
export type { WatermarkPluginFrontmatter, WatermarkPluginOptions, WatermarkPureOptions };