import { NormalizedMessage, InteractiveButton, ListSection } from '../types';

export abstract class MessagingProvider {
    /** Parse raw webhook payload into normalized message */
    abstract parseInbound(body: any): NormalizedMessage | null;

    /** Send a plain text message */
    abstract sendText(to: string, text: string): Promise<void>;

    /** Send interactive buttons (max 3 for WhatsApp) */
    abstract sendButtons(to: string, body: string, buttons: InteractiveButton[]): Promise<void>;

    /** Send interactive list (max 10 rows total across sections) */
    abstract sendList(to: string, body: string, buttonText: string, sections: ListSection[]): Promise<void>;

    /** Send an image with optional caption */
    abstract sendImage(to: string, imageUrl: string, caption?: string): Promise<void>;

    /** Validate that inbound webhook is authentic */
    abstract validateWebhook(body: any): boolean;
}