import { serve } from "https://deno.land/std@0.168.0/http/server.ts";

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

interface StatusRequest {
  paymentId: string;
}

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

  try {
    const apiToken = Deno.env.get('SIGMAPAY_API_KEY');
    if (!apiToken) {
      console.error('SIGMAPAY_API_KEY not configured');
      return new Response(
        JSON.stringify({ error: 'Chave de API não configurada' }),
        { status: 500, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
      );
    }

    const body: StatusRequest = await req.json();
    const { paymentId } = body;

    if (!paymentId) {
      return new Response(
        JSON.stringify({ error: 'ID do pagamento é obrigatório' }),
        { status: 400, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
      );
    }

    console.log('Checking SigmaPay payment status:', paymentId);

    // Use the external SigmaPay proxy service
    const proxyResponse = await fetch('https://qpnojbfmthfkorggbqkd.supabase.co/functions/v1/sigmapay-check-status', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ 
        paymentId: paymentId,
        apiToken: apiToken
      })
    });

    const responseText = await proxyResponse.text();
    console.log('Status check response:', proxyResponse.status, responseText);

    if (!proxyResponse.ok) {
      // Return pending status on error to avoid breaking the polling
      return new Response(
        JSON.stringify({ status: 'pending', error: 'Erro ao verificar status' }),
        { status: 200, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
      );
    }

    let data;
    try {
      data = JSON.parse(responseText);
    } catch {
      return new Response(
        JSON.stringify({ status: 'pending' }),
        { status: 200, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
      );
    }

    console.log('Payment status:', data.status);

    return new Response(
      JSON.stringify({ 
        id: data.id || paymentId,
        status: data.status || 'pending',
        originalStatus: data.originalStatus
      }),
      { headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
    );

  } catch (error) {
    console.error('Error checking SigmaPay status:', error);
    return new Response(
      JSON.stringify({ status: 'pending', error: error instanceof Error ? error.message : 'Erro interno' }),
      { status: 200, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
    );
  }
});