import { EmailClient, GetEmailClientOptions } from '@happyvertical/email';
import { Account } from './models/Account.js';
import { MessageClientFactory, MessageSenderInterface, MessagingChannel } from './types.js';
export type MessagingProviderFieldType = 'string' | 'number' | 'boolean' | 'select' | 'url' | 'email' | 'password';
export interface MessagingProviderField {
    id: string;
    label: string;
    type: MessagingProviderFieldType;
    required?: boolean;
    description?: string;
    placeholder?: string;
    options?: Array<{
        value: string;
        label: string;
    }>;
}
/** Public setup contract. Credential values are never represented here. */
export interface MessagingProviderDefinition {
    id: string;
    label: string;
    channel: MessagingChannel;
    available: boolean;
    configurationFields: MessagingProviderField[];
    credentialFields: MessagingProviderField[];
    endpointFields: MessagingProviderField[];
    createSender?: (account: Account) => Promise<MessageSenderInterface>;
    /**
     * Creates the SDK email client for this provider. Absent on the builtin
     * metadata-only definitions — registered by the explicit
     * `@happyvertical/smrt-messages/providers/email` entry point so the
     * @happyvertical/email SDK (googleapis/nodemailer) never enters
     * provider-neutral consumer bundles (#1979).
     */
    createEmailClient?: (options: GetEmailClientOptions) => Promise<EmailClient>;
    /**
     * Creates the SDK message client (Slack, Twitter, …) for this provider.
     * Registered by the matching `@happyvertical/smrt-messages/providers/*`
     * entry point; absent until that entry is imported.
     */
    createMessageClient?: MessageClientFactory;
}
/**
 * Function-valued definition keys. Stripped by MessagingSettingsService before
 * definitions are serialized to setup UIs.
 */
export type MessagingProviderFunctionKey = 'createSender' | 'createEmailClient' | 'createMessageClient';
export declare function registerMessagingProvider(provider: MessagingProviderDefinition): () => void;
export declare function getMessagingProvider(id: string): MessagingProviderDefinition | undefined;
export declare function listMessagingProviders(options?: {
    includeUnavailable?: boolean;
}): MessagingProviderDefinition[];
export declare function ensureBuiltinMessagingProvidersRegistered(): void;
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