import { WeChatApiConfig, CreateDraftResponse, GetDraftResponse, PublishResponse, PublishStatusResponse, MediaUploadResponse, WeChatApiResponse, DraftArticle, GetMaterialListResponse, BatchUploadMemesResponse, ImageInsertionConfig, ContentProcessingResult } from '../../types';
/**
 * WeChat API Client for managing drafts and publishing articles
 */
export declare class WeChatApiClient {
    private config;
    private httpClient;
    private accessToken;
    private tokenExpiryTime;
    constructor(config: WeChatApiConfig);
    /**
     * Ensure access token is valid and refresh if necessary
     */
    private ensureValidToken;
    /**
     * Refresh access token from WeChat API
     */
    private refreshAccessToken;
    /**
     * Create a new draft article
     */
    createDraft(articles: DraftArticle[]): Promise<CreateDraftResponse>;
    /**
     * Get an existing draft article
     */
    getDraft(mediaId: string): Promise<GetDraftResponse>;
    /**
     * Delete an existing draft article
     */
    deleteDraft(mediaId: string): Promise<WeChatApiResponse>;
    /**
     * Publish a draft article
     */
    publishDraft(mediaId: string): Promise<PublishResponse>;
    /**
     * Get publishing status of an article
     */
    getPublishStatus(publishId: string): Promise<PublishStatusResponse>;
    /**
     * Upload media file (image/thumbnail)
     */
    uploadMedia(fileBuffer: Buffer, mimeType: string, mediaType?: string): Promise<MediaUploadResponse>;
    /**
     * Get file extension from MIME type
     */
    private getFileExtension;
    /**
     * Validate WeChat API response for errors
     */
    private validateResponse;
    /**
     * Get current access token (for debugging purposes)
     */
    getAccessToken(): string | null;
    /**
     * Get material list (images, videos, voices, news)
     */
    getMaterialList(type: string, offset?: number, count?: number): Promise<GetMaterialListResponse>;
    /**
     * Check if access token is valid
     */
    isTokenValid(): boolean;
    /**
     * Batch upload memes from Meme API to WeChat
     */
    batchUploadMemes(count?: number, subreddit?: string, skipNsfw?: boolean, skipSpoiler?: boolean, minUps?: number): Promise<BatchUploadMemesResponse>;
    /**
     * Fetch memes from Meme API
     */
    private fetchMemesFromApi;
    /**
     * Filter memes based on criteria
     */
    private filterMemes;
    /**
     * Remove duplicate memes based on URL
     */
    private removeDuplicateMemes;
    /**
     * Download image from URL
     */
    private downloadImage;
    /**
     * Process content and insert images intelligently
     */
    processContentWithImages(content: string, config: ImageInsertionConfig): ContentProcessingResult;
    /**
     * Create a draft article with automatic image integration from batch upload
     */
    createDraftWithBatchImages(article: DraftArticle, imageConfig?: ImageInsertionConfig): Promise<CreateDraftResponse & {
        image_integration_info?: any;
    }>;
    /**
     * Automatically insert images at strategic positions
     */
    private insertImagesAutomatically;
    /**
     * Insert images by paragraph breaks
     */
    private insertImagesByParagraph;
    /**
     * Calculate optimal insertion points for images
     */
    private calculateInsertionPoints;
    /**
     * Select image based on strategy
     */
    private selectImageByStrategy;
    /**
     * Find insertion position in HTML content
     */
    private findInsertionPositionInHtml;
    /**
     * Extract first and last words for partial matching
     */
    private getFirstAndLastWords;
    /**
     * Find the next suitable insertion point
     */
    private findNextInsertionPoint;
    /**
     * Find insertion point at paragraph boundaries as fallback
     */
    private findParagraphInsertionPoint;
    /**
     * Generate WeChat compatible image HTML
     * @param imageUrlOrMediaId - Either a full URL from Get Material List or a media_id
     * @param imageType - Image type (png, jpg, etc.)
     */
    private generateWeChatImageHtml;
}