/**
 * HOW TO RUN:
 * 1. Save this file as `test-trust-sse-js.js` (standard CommonJS).
 * 2. Run the following command in your terminal:
 * node test-trust-sse-js.js
 */

const API_BASE_URL = "https://trust-sse.oten.com";
const API_KEY = "ot_live_-d5Il4kuuv..."; // Replace with your actual API Key
const URL_TO_SCAN = "https://google.com";

/**
 * Scans a URL using Server-Sent Events (SSE) via Fetch API
 * @param {string} url - The target URL to scan
 * @param {string} lang - Language for the response (default: "en")
 */
async function scanUrl(url, lang = "en") {
  const endpoint = new URL('/api/v1/scan-url', API_BASE_URL);
  endpoint.searchParams.set('url', url);
  endpoint.searchParams.set('lang', lang);

  try {
    // Node.js 18+ has native fetch built-in
    const response = await fetch(endpoint.toString(), {
      method: 'GET',
      headers: {
        'Authorization': `Bearer ${API_KEY}`,
        'Accept': 'text/event-stream',
      },
    });

    if (!response.ok) {
      console.error(`[Error] Status: ${response.status} ${response.statusText}`);
      const errorText = await response.text();
      console.error("[Detail]:", errorText);
      return;
    }

    const reader = response.body.getReader();
    const decoder = new TextDecoder();
    let currentEvent = null;

    console.log(">>> Connected to Stream (CommonJS Mode)");

    while (true) {
      const { value, done } = await reader.read();
      if (done) break;

      const chunk = decoder.decode(value);
      const lines = chunk.split('\n');

      for (const line of lines) {
        const trimmedLine = line.trim();
        if (!trimmedLine) continue;

        if (trimmedLine.startsWith('event:')) {
          currentEvent = trimmedLine.replace('event:', '').trim();
          continue;
        }

        if (trimmedLine.startsWith('data:')) {
          const rawData = trimmedLine.replace('data:', '').trim();

          switch (currentEvent) {
            case 'progress':
              console.log("[progress]", rawData);
              break;
            case 'heartbeat':
              console.log("[heartbeat] ❤️");
              break;
            case 'result':
              try {
                const parsed = JSON.parse(rawData);
                console.log("✅ [RESULT]:", JSON.stringify(parsed, null, 2));
              } catch {
                console.log("✅ [RESULT raw]:", rawData);
              }
              break;
            case 'error':
              console.error("❌ [event error]:", rawData);
              break;
            default:
              console.log(`[${currentEvent || 'message'}]`, rawData);
          }
          currentEvent = null;
        }
      }
    }
    console.log(">>> Stream Closed");

  } catch (err) {
    console.error("!!! Execution Error:", err);
  }
}

// Execute the function
scanUrl(URL_TO_SCAN);