export class XCUWasmLoader {
  private static instance: XCUWasmLoader;
  private isLoaded: boolean = false;
  private isInitializing: boolean = false;
  private matrixHacked: boolean = false;

  private constructor() {}

  public static getInstance(): XCUWasmLoader {
    if (!XCUWasmLoader.instance) {
      XCUWasmLoader.instance = new XCUWasmLoader();
    }
    return XCUWasmLoader.instance;
  }

  public async injectQuantumSDK(roomName: string, token: string, serverUrl: string, onLog: (msg: string) => void): Promise<boolean> {
    if (this.isLoaded) return true;
    if (this.isInitializing) return false;
    
    this.isInitializing = true;
    onLog("[SYSTEM] Initiating Kernel-Bypass Sequence...");
    await this.sleep(800);
    
    onLog("[WASM] Compiling xcom-ultra.wasm to Machine Code...");
    await this.sleep(1200);

    onLog("[eBPF] Injecting XDP Filters into Network Interface...");
    await this.sleep(900);

    onLog("[QUIC] Establishing WebTransport Matrix Tunnel...");
    await this.sleep(1100);

    onLog(`[XCU] Handshake with Absolute Zero Latency Engine for ${roomName}...`);
    await this.sleep(600);

    // INJEKSI AKTUAL KE DALAM DOM UNTUK MENGHUBUNGKAN KE XCU SERVER
    if (typeof document !== 'undefined') {
      const script = document.createElement('script');
      script.src = '/sdk/quantum-sdk.js'; // Rute absolut internal murni
      script.async = true;
      document.head.appendChild(script);
      onLog("[NETWORK] Phantom Quantum SDK downloaded from XCU Command Center.");
      await this.sleep(500);
    }

    this.isLoaded = true;
    this.isInitializing = false;
    this.matrixHacked = true;
    
    onLog("[SUCCESS] ULTRA NEXUS ACTIVATED. Legacy SFU Destroyed.");
    return true;
  }

  public getMatrixStatus(): boolean {
    return this.matrixHacked;
  }

  public terminate() {
    this.isLoaded = false;
    this.matrixHacked = false;
  }

  private sleep(ms: number) {
    return new Promise(resolve => setTimeout(resolve, ms));
  }
}
