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<script>
  import '../app.css';
  import { Home, Settings, History, Github, Menu } from 'lucide-svelte';
  import { onMount } from 'svelte';
  
  let currentPage = 'tts';
  let sidebarOpen = true;
  let isLoggedIn = false;
  let username = '';
  
  onMount(() => {
    // Check if user is logged in
    checkLoginStatus();
    
    // Re-check login status when page becomes visible (e.g., after OAuth redirect)
    document.addEventListener('visibilitychange', () => {
      if (!document.hidden) {
        checkLoginStatus();
      }
    });
    
    // Listen for storage changes (e.g., when token is set from OAuth callback)
    window.addEventListener('storage', checkLoginStatus);
    
    // Also check periodically to catch cases where localStorage changes in same tab
    const interval = setInterval(checkLoginStatus, 1000);
    
    return () => {
      window.removeEventListener('storage', checkLoginStatus);
      clearInterval(interval);
    };
  });
  
  function checkLoginStatus() {
    const token = localStorage.getItem('hf_access_token');
    if (token) {
      // Fetch user info from HuggingFace API
      fetchUserInfo(token);
    } else {
      isLoggedIn = false;
      username = '';
    }
  }
  
  async function fetchUserInfo(token) {
    try {
      // For OAuth tokens, we need to use the OAuth API endpoint
      const isOAuthToken = token.startsWith('hf_oauth_');
      const apiUrl = isOAuthToken 
        ? 'https://huggingface.co/oauth/userinfo'
        : 'https://huggingface.co/api/whoami';
      
      const response = await fetch(apiUrl, {
        headers: {
          'Authorization': `Bearer ${token}`
        }
      });
      
      if (response.ok) {
        const userData = await response.json();
        isLoggedIn = true;
        const fullName = userData.name || userData.login || 'User';
        username = fullName.split(' ')[0]; // Extract first name only
      } else {
        // Token might be invalid, remove it
        localStorage.removeItem('hf_access_token');
        isLoggedIn = false;
        username = '';
      }
    } catch (error) {
      // Token might be invalid, remove it
      localStorage.removeItem('hf_access_token');
      isLoggedIn = false;
      username = '';
    }
  }
  
  function handleAuthAction() {
    if (isLoggedIn) {
      // Logout
      localStorage.removeItem('hf_access_token');
      sessionStorage.removeItem('oauth_state');
      isLoggedIn = false;
      username = '';
    } else {
      // Login
      const clientId = 'cdf32a17-e40f-4a84-b683-f66aa1105793';
      const redirectUri = 'http://localhost:11111/auth/callback';
      const scope = 'read-repos';
      const state = Math.random().toString(36).substring(2, 15);
      const authUrl = `https://huggingface.co/oauth/authorize?client_id=${clientId}&redirect_uri=${encodeURIComponent(redirectUri)}&scope=${scope}&response_type=code&state=${state}`;
      
      sessionStorage.setItem('oauth_state', state);
      window.location.href = authUrl;
    }
  }
</script>

<div class="flex h-screen bg-white">
  <!-- Sidebar -->
  <aside class="w-56 border-r border-gray-200 bg-white flex-shrink-0 {sidebarOpen ? '' : 'hidden'}">
    <div class="p-4 border-b border-gray-200">
      <div class="flex items-center gap-3">
        <img src="/assets/hf-studio-logo.png" alt="HF Logo" class="w-8 h-8" />
        <h1 class="text-xl font-semibold">HFStudio<sup class="text-xs text-gray-500 ml-1">BETA</sup></h1>
      </div>
    </div>
    
    <nav class="p-2 text-sm">      
      <div class="mt-2 mb-1 px-2 text-xs font-medium text-gray-500 uppercase">
        Tasks
      </div>
      
      <button
        class="w-full flex items-center gap-2 px-2 py-1.5 rounded-md hover:bg-gray-100 transition-colors text-left
               {currentPage === 'tts' ? 'bg-gray-100' : ''}"
        on:click={() => currentPage = 'tts'}
      >
        <span>πŸŽ™οΈ</span>
        <span>Text to Speech</span>
      </button>
      
      <button
        class="w-full flex items-center gap-2 px-2 py-1.5 rounded-md text-left opacity-40 cursor-not-allowed"
        disabled
      >
        <span>🎡</span>
        <span>Voice Cloning</span>
      </button>
      
      <button
        class="w-full flex items-center gap-2 px-2 py-1.5 rounded-md text-left opacity-40 cursor-not-allowed"
        disabled
      >
        <span>🎧</span>
        <span>Speech to Text</span>
      </button>
      
      <button
        class="w-full flex items-center gap-2 px-2 py-1.5 rounded-md text-left opacity-40 cursor-not-allowed"
        disabled
      >
        <span>🎼</span>
        <span>Sound Effects</span>
      </button>
      
      <button
        class="w-full flex items-center gap-2 px-2 py-1.5 rounded-md text-left opacity-40 cursor-not-allowed"
        disabled
      >
        <span>🎸</span>
        <span>Music Generation</span>
      </button>
      
      <button
        class="w-full flex items-center gap-2 px-2 py-1.5 rounded-md text-left opacity-40 cursor-not-allowed"
        disabled
      >
        <span>πŸ”Š</span>
        <span>Audio Enhancement</span>
      </button>
      
    </nav>
    
    <!-- Sign in with Hugging Face at bottom -->
    <div class="absolute bottom-4 left-2 right-2 w-52">
      <button
        on:click={handleAuthAction}
        class="w-full px-6 py-3 bg-black text-white rounded-lg font-medium hover:bg-gray-800 transition-colors shadow-sm flex items-center justify-center gap-2 text-sm"
      >
        <img src="/assets/hf-logo.png" alt="HF Logo" class="w-5 h-5" />
        {#if isLoggedIn}
          <span>Sign Out, {username}</span>
        {:else}
          <span>Sign In</span>
        {/if}
      </button>
    </div>
  </aside>
  
  <!-- Main content -->
  <main class="flex-1 overflow-auto">
    <slot />
  </main>
</div>