/**
 * lib/whatsapp.ts
 * Centralized service to send WhatsApp messages via AyrisTech WhatsApp Worker.
 */

export async function sendWA(to: string, message: string, userId: string = 'mustafa_yildiz') {
  try {
    const workerUrl = process.env.WHATSAPP_WORKER_URL;
    const secret = process.env.WHATSAPP_SECRET;

    if (!workerUrl || !secret) {
      console.error('[WhatsApp] Missing environment variables (URL or Secret)');
      return { success: false, error: 'Config missing' };
    }

    const response = await fetch(`${workerUrl}/send-message`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        secret,
        userId,
        to,
        message
      }),
    });

    const data = await response.json();
    if (!response.ok) throw new Error(data.error || 'Mesaj gönderilemedi');
    
    return { success: true, data };
  } catch (error) {
    console.error('WhatsApp Error:', error);
    return { success: false, error: error instanceof Error ? error.message : 'Bilinmeyen hata' };
  }
}