import type { NotificationPayload, NotificationRecipient } from '../notifications.types.js';
export interface NotificationChannel {
    readonly name: string;
    readonly type: ChannelType;
    initialize?(): Promise<void>;
    shutdown?(): Promise<void>;
    isAvailable(): Promise<boolean>;
    healthCheck(): Promise<ChannelHealth>;
    validateRecipient(recipient: NotificationRecipient): boolean;
    formatContent(notification: NotificationPayload): ChannelContent;
    send(recipient: NotificationRecipient, content: ChannelContent): Promise<ChannelSendResult>;
}
export declare enum ChannelType {
    Email = "email",
    SMS = "sms",
    Push = "push",
    InApp = "inApp",
    Webhook = "webhook"
}
export interface ChannelContent {
    subject?: string;
    html?: string;
    text?: string;
    data?: Record<string, unknown>;
}
export interface EmailContent extends ChannelContent {
    subject: string;
    text: string;
    html?: string;
    from?: string;
    replyTo?: string;
    attachments?: Array<{
        filename: string;
        content: Buffer | string;
        contentType?: string;
    }>;
}
export interface SMSContent extends ChannelContent {
    text: string;
    from?: string;
}
export interface PushContent extends ChannelContent {
    title: string;
    body: string;
    data?: Record<string, unknown>;
    badge?: number;
    sound?: string;
    icon?: string;
    image?: string;
    clickAction?: string;
}
export interface InAppContent extends ChannelContent {
    title: string;
    message: string;
    type: string;
    priority?: string;
    data?: Record<string, unknown>;
}
export interface WebhookContent extends ChannelContent {
    payload: Record<string, unknown>;
    headers?: Record<string, string>;
}
export interface ChannelSendResult {
    success: boolean;
    messageId?: string;
    error?: string;
    metadata?: Record<string, unknown>;
}
export interface ChannelHealth {
    name: string;
    type: ChannelType;
    available: boolean;
    latency?: number;
    error?: string;
    metadata?: Record<string, unknown>;
}
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