╔════════════════════════════════════════════════════════════════╗
║   VIDEO STREAMING BANDWIDTH TEST - vid30s.com                   ║
╚════════════════════════════════════════════════════════════════╝

Video Details:
  - ID: 1
  - Slug: 0HpOeSU7
  - Provider: vid30s
  - CDN Host: vidoycdn.b-cdn.net
  - HLS URL: https://vidoycdn.b-cdn.net/video.m3u8?token=xyz123&expires=1...

┌─ SKENARIO 1: PROXY MODE (Current - /stream/) ─────────────────┐
│ Flow: Browser → Server (Proxy) → CDN                         │
│ Route: GET /stream/0HpOeSU7 → StreamProxyController          │
└───────────────────────────────────────────────────────────────┘

📊 Single short video (100MB):
   └─ CDN outbound:    100MB ❌ (charged to CDN provider)
   └─ Server outbound: 100MB ❌ (charged to your server)
   └─ TOTAL:           200MB (Double bandwidth!)

📊 Medium length video (500MB):
   └─ CDN outbound:    500MB ❌ (charged to CDN provider)
   └─ Server outbound: 500MB ❌ (charged to your server)
   └─ TOTAL:           1000MB (Double bandwidth!)

📊 Full length movie (1000MB):
   └─ CDN outbound:    1000MB ❌ (charged to CDN provider)
   └─ Server outbound: 1000MB ❌ (charged to your server)
   └─ TOTAL:           2000MB (Double bandwidth!)


┌─ SKENARIO 2: REDIRECT MODE (Alternative) ──────────────────────┐
│ Flow: Browser → CDN (Direct redirect)                        │
│ Route: GET /e/0HpOeSU7 → return redirect() to CDN URL        │
└───────────────────────────────────────────────────────────────┘

📊 Single short video (100MB):
   └─ CDN outbound:    100MB ⚠️ (charged to CDN provider - NO WAY TO AVOID)
   └─ Server outbound: 0MB ✅ (your server bandwidth SAVED!)
   └─ TOTAL:           100MB (No double bandwidth)

📊 Medium length video (500MB):
   └─ CDN outbound:    500MB ⚠️ (charged to CDN provider - NO WAY TO AVOID)
   └─ Server outbound: 0MB ✅ (your server bandwidth SAVED!)
   └─ TOTAL:           500MB (No double bandwidth)

📊 Full length movie (1000MB):
   └─ CDN outbound:    1000MB ⚠️ (charged to CDN provider - NO WAY TO AVOID)
   └─ Server outbound: 0MB ✅ (your server bandwidth SAVED!)
   └─ TOTAL:           1000MB (No double bandwidth)


╔════════════════════════════════════════════════════════════════╗
║                    BANDWIDTH COMPARISON                         ║
╚════════════════════════════════════════════════════════════════╝

Per Single Request:
Request             Proxy Mode     Redirect Mode  Saved       
──────────────────────────────────────────────────────────────
Single short video  200MB          100MB          100MB ✅   
Medium length video 1000MB         500MB          500MB ✅   
Full length movie   2000MB         1000MB         1000MB ✅  


╔════════════════════════════════════════════════════════════════╗
║              CONCURRENT USERS IMPACT (100MB video)             ║
╚════════════════════════════════════════════════════════════════╝

Assuming 100MB video streaming simultaneously:

Users       Proxy Total       Redirect Total    Server Saved
──────────────────────────────────────────────────────────────
1 users     200MB             100MB             100MB ✅   
5 users     1000MB            500MB             500MB ✅   
10 users    2000MB            1000MB            1000MB ✅  
20 users    4000MB            2000MB            2000MB ✅  


╔════════════════════════════════════════════════════════════════╗
║                  ISSUES & CONSIDERATIONS                        ║
╚════════════════════════════════════════════════════════════════╝

PROXY MODE (Current):
  ✅ CORS proxy - solves browser cross-origin issues
  ✅ Server kontrol - bisa add custom headers (Referer, auth)
  ✅ Bandwidth control - bisa rate limit per user
  ✅ Privacy - client IP terlihat dari server saja
  ❌ EXPENSIVE - double bandwidth usage!
  ❌ Server load - PHP process occupies memory
  ❌ Latency - extra hop through server

REDIRECT MODE (Alternative):
  ✅ CHEAP - minimal server bandwidth
  ✅ Fast - direct CDN to client
  ✅ Scalable - no server bottleneck
  ❌ CORS issue - browser blocks cross-origin requests
  ❌ No Referer header - CDN may reject (403)
  ❌ No control - pure client-CDN communication
  ❌ Cannot add auth headers via browser

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║                    RECOMMENDATION                              ║
╚════════════════════════════════════════════════════════════════╝

HYBRID APPROACH:
┌─ Use lightweight proxy for Referer-protected CDNs ────────────┐
│                                                               │
│ 1. Check if CDN requires Referer header:                     │
│    HEAD request to CDN URL                                    │
│                                                               │
│ 2a. If 200 OK → Redirect client directly to CDN             │
│     - No proxy, zero server bandwidth                         │
│                                                               │
│ 2b. If 403 Forbidden → Use lightweight proxy                │
│     - Just forward with Referer header                        │
│     - NOT full stream through PHP (use nginx/varnish)        │
│                                                               │
└───────────────────────────────────────────────────────────────┘

This way you get:
  ✅ 50% bandwidth savings (most videos)
  ✅ Still support Referer-protected CDNs
  ✅ Better performance

╔════════════════════════════════════════════════════════════════╗
║              PROPOSED CODE CHANGES                             ║
╚════════════════════════════════════════════════════════════════╝

In EmbedController.php - resolveHlsPlaybackUrl():
───────────────────────────────────────────────────────────────
private function resolveHlsPlaybackUrl(Video $video, ?string $hlsUrl): ?string
{
    if (!$hlsUrl) {
        return $hlsUrl;
    }

    // Try to access CDN directly first (no Referer needed)
    $host = parse_url($hlsUrl, PHP_URL_HOST);
    
    // Check if URL accessible without proxy
    if ($this->isCdnDirectlyAccessible($hlsUrl)) {
        // Safe to use direct CDN URL - no proxy needed!
        return $hlsUrl;  // ← Client downloads directly from CDN
    }

    // If direct access fails (403), use proxy for Referer header
    $corsBlockedCdns = [
        'vidoycdn.b-cdn.net',
        'b-cdn.net',
        'cdnvvidey.de',
    ];

    foreach ($corsBlockedCdns as $cdn) {
        if (str_contains($host, $cdn)) {
            // Use LIGHTWEIGHT proxy (just forward with header)
            return route('stream.video', $video);
        }
    }

    return $hlsUrl;
}

private function isCdnDirectlyAccessible(string $url): bool
{
    // Cache result untuk 1 jam
    $cacheKey = 'cdn_access_' . md5($url);
    
    if (Cache::has($cacheKey)) {
        return Cache::get($cacheKey);
    }

    try {
        $response = Http::timeout(5)->head($url);
        $accessible = $response->successful();
        
        // Cache result
        Cache::put($cacheKey, $accessible, now()->addHours(1));
        
        return $accessible;
    } catch (\Throwable $e) {
        return false; // Assume needs proxy
    }
}

Result:
  📊 Scenario 1: CDN accessible directly
     → Return plain 
     → Browser fetches directly from CDN
     → 50% bandwidth savings! ✅

  📊 Scenario 2: CDN needs Referer (403)
     → Return route('stream.video')
     → Proxy adds Referer header
     → Still uses server bandwidth, but only when necessary

╔════════════════════════════════════════════════════════════════╗
║              NEXT STEPS - TESTING                              ║
╚════════════════════════════════════════════════════════════════╝

1. Run this script to understand the scenarios:
   $ php scripts/test_bandwidth_scenario.php

2. Create test endpoint (optional):
   GET /test/cdn-accessibility
   → Test actual CDN access from your server

3. Modify EmbedController.php with hybrid approach:
   → Check CDN accessibility
   → Use direct URL if possible
   → Use proxy only when necessary

4. Monitor bandwidth impact:
   → Check server outbound traffic
   → Compare before/after

Done! ✅