import { SupabaseClient, Provider } from "@supabase/supabase-js";
import { SignUpCredentials, SignInCredentials, OAuthOptions, AuthStateChangeCallback } from "./authTypes";
export declare class AuthService {
    private supabase;
    constructor(supabase: SupabaseClient);
    /**
     * Sign up a new user with email and password.
     * @param credentials - User's email and password.
     * @returns Supabase response data and error.
     */
    signUp(credentials: SignUpCredentials): Promise<{
        data: {
            user: import("@supabase/supabase-js").AuthUser | null;
            session: import("@supabase/supabase-js").AuthSession | null;
        } | {
            user: null;
            session: null;
        };
        error: import("@supabase/supabase-js").AuthError | null;
    }>;
    /**
     * Sign in an existing user with email and password.
     * @param credentials - User's email and password.
     * @returns Supabase response data and error.
     */
    signIn(credentials: SignInCredentials): Promise<{
        data: {
            user: import("@supabase/supabase-js").AuthUser;
            session: import("@supabase/supabase-js").AuthSession;
            weakPassword?: import("@supabase/supabase-js").WeakPassword;
        } | {
            user: null;
            session: null;
            weakPassword?: null;
        };
        error: import("@supabase/supabase-js").AuthError | null;
    }>;
    /**
     * Sign in with OAuth provider.
     * @param options - OAuth provider options.
     * @returns Supabase response data and error.
     */
    signInWithOAuth(options: OAuthOptions): Promise<{
        data: {
            provider: Provider;
            url: string;
        } | {
            provider: Provider;
            url: null;
        };
        error: import("@supabase/supabase-js").AuthError | null;
    }>;
    /**
     * Sign out the current user.
     * @returns Supabase response error if any.
     */
    signOut(): Promise<{
        error: import("@supabase/supabase-js").AuthError | null;
    }>;
    /**
     * Listen to authentication state changes.
     * @param callback - Function to handle auth events.
     * @returns Unsubscribe function.
     */
    onAuthStateChange(callback: AuthStateChangeCallback): () => void;
}