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

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

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

  const tracking = startRequest('trigger-notification');

  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! };

    edgeLogger.info('Triggering notification', { 
      workflowId, 
      recipient, 
      requestId: tracking.requestId,
      action: 'trigger_notification'
    });

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

    edgeLogger.info('Notification triggered successfully', { 
      requestId: tracking.requestId,
      transactionId: result.data.transactionId
    });

    endRequest(tracking, 200);

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

    return new Response(
      JSON.stringify({
        success: false,
        error: errorMessage,
        requestId: tracking.requestId
      }),
      {
        headers: { 
          ...corsHeaders, 
          'Content-Type': 'application/json',
          'X-Request-ID': tracking.requestId
        },
        status: 500,
      }
    );
  }
});