// ==UserScript==
// @name         Cursor Enterprise Invoice/SEPA Mock
// @namespace    gothbreach.cursor.invoice
// @version      1.0.0
// @description  Mock Cursor tRPC billing endpoints to force enterprise invoice/SEPA flow
// @match        *://cursor.com/*
// @run-at       document-start
// @grant        none
// ==/UserScript==

(function () {
  "use strict";

  const BILLING_PATTERNS = [
    '/api/trpc/billing',
    '/api/trpc/checkout',
    '/api/billing/'
  ];

  const MOCK_DATA = {
    paymentMethods: ['invoice', 'sepa', 'wire_transfer', 'bank_transfer'],
    checkoutFlow: 'enterprise',
    invoiceBilling: { enabled: true, currency: 'eur' },
    sepaAvailable: true,
    bankTransferAvailable: true,
    poBilling: true,
    requiresCard: false
  };

  const nativeFetch = window.fetch;
  window.fetch = async function (input, init) {
    const url = typeof input === 'string' ? input : input?.url || '';
    const response = await nativeFetch.apply(this, arguments);

    const isBilling = BILLING_PATTERNS.some(p => url.includes(p));
    if (!isBilling) return response;

    try {
      const cloned = response.clone();
      const data = await cloned.json();
      console.warn('[Cursor SEPA] Original:', JSON.stringify(data).substring(0, 300));

      // tRPC wraps response in { result: { data: ... } }
      const mock = {
        ...data,
        result: {
          data: {
            ...(data?.result?.data || {}),
            ...MOCK_DATA
          }
        }
      };

      return new Response(JSON.stringify(mock), {
        status: 200,
        statusText: 'OK',
        headers: new Headers({ 'Content-Type': 'application/json' })
      });
    } catch {
      return response;
    }
  };

  // Status badge
  function showBadge() {
    if (document.getElementById('cursor-sepa-badge')) return;
    const badge = document.createElement('div');
    badge.id = 'cursor-sepa-badge';
    badge.textContent = 'Cursor SEPA ON';
    Object.assign(badge.style, {
      position: 'fixed', right: '12px', bottom: '12px', zIndex: '2147483647',
      padding: '7px 11px', color: '#fff', background: '#167c3a',
      borderRadius: '6px', fontSize: '12px', fontFamily: 'sans-serif',
      boxShadow: '0 2px 8px rgba(0,0,0,.3)'
    });
    (document.documentElement || document.body).appendChild(badge);
  }

  console.info('[Cursor SEPA] Script loaded:', location.href);
  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', showBadge, { once: true });
  } else {
    showBadge();
  }
})();