/**
 * Slack Integration Service
 *
 * Simplified service that properly uses the official Slack SDK libraries:
 * - @slack/oauth InstallProvider for OAuth flow management
 * - @slack/web-api WebClient for Slack API operations
 * - Metadata-based project-to-team mapping
 */
import { WebClient } from "@slack/web-api";
import { InstallProvider } from "@slack/oauth";
export interface SlackChannel {
    id: string;
    name: string;
    isPrivate: boolean;
    isMember: boolean;
}
export interface SlackMessageParams {
    client: WebClient;
    channelId: string;
    blocks: any[];
    text?: string;
}
export interface SlackMessageResponse {
    messageTs: string;
    channel: string;
}
export interface SlackInstallationMetadata {
    projectId: string;
}
/**
 * Helper function to safely parse and validate Slack installation metadata
 */
export declare function parseSlackInstallationMetadata(metadata: unknown): SlackInstallationMetadata;
/**
 * Slack Service Class
 *
 * Uses InstallProvider for OAuth flow and metadata-based project mapping.
 * Much simpler than the previous implementation while maintaining all functionality.
 */
export declare class SlackService {
    private static instance;
    private readonly installer;
    private constructor();
    /**
     * Get singleton instance of SlackService
     */
    static getInstance(): SlackService;
    /**
     * Get the configured InstallProvider instance for OAuth handling
     */
    getInstaller(): InstallProvider;
    /**
     * Reset the singleton instance (useful for testing)
     */
    static resetInstance(): void;
    /**
     * Delete Slack integration for a project
     */
    deleteIntegration(projectId: string): Promise<void>;
    /**
     * Get WebClient for a specific project
     */
    getWebClientForProject(projectId: string): Promise<WebClient>;
    /**
     * Recursively fetch all channels accessible to the bot
     * Uses cursor-based pagination defined by Slack API https://api.slack.com/apis/pagination
     */
    private getChannelsRecursive;
    /**
     * Get channels accessible to the bot
     */
    getChannels(client: WebClient): Promise<SlackChannel[]>;
    /**
     * Send a message to a Slack channel
     */
    sendMessage(params: SlackMessageParams): Promise<SlackMessageResponse>;
    /**
     * Validate a WebClient instance
     */
    validateClient(client: WebClient): Promise<boolean>;
}
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