import { serve } from "https://deno.land/std@0.168.0/http/server.ts";
import { Novu } from "npm:@novu/api@1.6.0";

const corsHeaders = {
  'Access-Control-Allow-Origin': '*',
  'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type',
};

serve(async (req) => {
  if (req.method === 'OPTIONS') {
    return new Response(null, { headers: corsHeaders });
  }

  try {
    const novuApiKey = Deno.env.get('NOVU_API_KEY');
    
    if (!novuApiKey) {
      throw new Error('NOVU_API_KEY is not configured');
    }

    const novu = new Novu({ 
      secretKey: novuApiKey 
    });

    const { workflowId, subscriberId, topicKey, payload, overrides } = await req.json() as {
      workflowId: string;
      subscriberId?: string;
      topicKey?: string;
      payload: Record<string, unknown>;
      overrides?: Record<string, unknown>;
    };

    // Support both individual subscribers and topics
    if (!subscriberId && !topicKey) {
      throw new Error('Either subscriberId or topicKey must be provided');
    }

    const recipient = subscriberId 
      ? { subscriberId }
      : { topicKey: topicKey! };

    console.log('Triggering notification:', { workflowId, recipient });

    const result = await novu.trigger({
      to: recipient,
      workflowId,
      payload,
      overrides,
    });

    console.log('Notification triggered successfully:', result.data);

    return new Response(
      JSON.stringify({
        success: true,
        transactionId: result.data.transactionId,
      }),
      {
        headers: { ...corsHeaders, 'Content-Type': 'application/json' },
        status: 200,
      }
    );
  } catch (error: unknown) {
    const errorMessage = error instanceof Error ? error.message : 'Unknown error occurred';
    console.error('Error triggering notification:', errorMessage);
    
    return new Response(
      JSON.stringify({
        success: false,
        error: errorMessage,
      }),
      {
        headers: { ...corsHeaders, 'Content-Type': 'application/json' },
        status: 500,
      }
    );
  }
});