export interface ParsedInboundSms {
  messageId: string;
  from: string;
  to: string;
  text: string;
  hasMedia: boolean;
  mediaUrls: string[];
}

export function parseTelnyxInboundMessage(body: unknown): ParsedInboundSms | null {
  try {
    const data = body as Record<string, unknown>;
    const eventData = (data.data as Record<string, unknown>) || data;
    const payload = (eventData.payload as Record<string, unknown>) || eventData;

    const from = ((payload.from as Record<string, unknown>)?.phone_number as string) || (payload.from as string) || '';
    const to = (Array.isArray(payload.to) ? (payload.to[0] as Record<string, unknown>)?.phone_number : (payload.to as Record<string, unknown>)?.phone_number) as string || '';
    const text = (payload.text as string) || (payload.body as string) || '';
    const messageId = (payload.id as string) || (eventData.id as string) || '';

    const media = (payload.media as Array<{ url: string }>) || [];
    const mediaUrls = media.map(m => m.url).filter(Boolean);

    if (!from || !text) return null;

    return { messageId, from, to, text: text.trim(), hasMedia: mediaUrls.length > 0, mediaUrls };
  } catch {
    return null;
  }
}