'use client';

import React, { useState, useEffect } from 'react';
import { useRouter } from 'next/navigation';
import { useSession } from 'next-auth/react';
import { 
  Mail, Loader2, AlertCircle, 
  MoreVertical, Settings, Plus as PlusIcon, Trash2, Edit, 
  Inbox, Send, Star, Trash, Plus, ChevronLeft, ChevronRight, 
  Search, ChevronDown, Folder, ChevronUp, Reply, Forward, ReplyAll, 
  MoreHorizontal, FolderOpen, X, Paperclip, MessageSquare, Copy, EyeOff, 
  AlertOctagon, Archive, RefreshCw, Menu
} from 'lucide-react';
import { Dialog, DialogContent, DialogTitle } from '@/components/ui/dialog';
import { Alert, AlertDescription, AlertTitle } from '@/components/ui/alert';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from "@/components/ui/alert-dialog";
import { ScrollArea } from '@/components/ui/scroll-area';
import { Avatar, AvatarFallback } from '@/components/ui/avatar';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Tabs, TabsList, TabsTrigger, TabsContent } from '@/components/ui/tabs';
import { Checkbox } from '@/components/ui/checkbox';
import { Label } from '@/components/ui/label';
import { toast } from '@/components/ui/use-toast';

// Import components
import EmailSidebar from '@/components/email/EmailSidebar';
import EmailList from '@/components/email/EmailList';
import EmailSidebarContent from '@/components/email/EmailSidebarContent';
import EmailDetailView from '@/components/email/EmailDetailView';
import ComposeEmail from '@/components/email/ComposeEmail';
import { DeleteConfirmDialog, LoginNeededAlert } from '@/components/email/EmailDialogs';

// Import the custom hook
import { useCourrier, EmailData } from '@/hooks/use-courrier';

// Import the prefetching function
import { prefetchFolderEmails } from '@/lib/services/prefetch-service';

// Simplified version for this component
function SimplifiedLoadingFix() {
  // In production, don't render anything
  if (process.env.NODE_ENV === 'production') {
    return null;
  }
  
  // Simple debugging component
  return (
    <div className="fixed bottom-4 right-4 z-50 p-2 bg-white/80 shadow rounded-lg text-xs">
      Debug: Email app loaded
    </div>
  );
}

interface Account {
  id: string;
  name: string;
  email: string;
  color: string;
  folders?: string[];
}

interface EmailWithFlags {
  id: string;
  read?: boolean;
  flags?: {
    seen?: boolean;
  };
}

export default function CourrierPage() {
  const router = useRouter();
  const { data: session } = useSession();
  
  // Get all the email functionality from the hook
  const {
    emails = [],
    selectedEmail,
    selectedEmailIds,
    currentFolder,
    mailboxes,
    isLoading,
    isSending,
    error,
    searchQuery,
    page,
    totalPages,
    loadEmails,
    handleEmailSelect,
    markEmailAsRead,
    toggleStarred,
    sendEmail,
    deleteEmails,
    toggleEmailSelection,
    toggleSelectAll,
    changeFolder,
    searchEmails,
    formatEmailForAction,
    setPage,
  } = useCourrier();

  // UI state
  const [showComposeModal, setShowComposeModal] = useState(false);
  const [composeType, setComposeType] = useState<'new' | 'reply' | 'reply-all' | 'forward'>('new');
  const [showDeleteConfirm, setShowDeleteConfirm] = useState(false);
  const [showLoginNeeded, setShowLoginNeeded] = useState(false);
  const [sidebarOpen, setSidebarOpen] = useState(true);
  const [mobileSidebarOpen, setMobileSidebarOpen] = useState(false);
  const [accountsDropdownOpen, setAccountsDropdownOpen] = useState(true);
  const [currentView, setCurrentView] = useState('INBOX');
  const [unreadCount, setUnreadCount] = useState(0);
  const [loading, setLoading] = useState(false);
  const [prefetchStarted, setPrefetchStarted] = useState(false);
  const [showFolders, setShowFolders] = useState(true);
  const [showAddAccountForm, setShowAddAccountForm] = useState(false);
  
  // Email accounts for the sidebar
  const [accounts, setAccounts] = useState<Account[]>([
    { id: 'all-accounts', name: 'All', email: '', color: 'bg-gray-500' },
    { id: 'loading-account', name: 'Loading...', email: '', color: 'bg-blue-500', folders: [] }
  ]);
  const [selectedAccount, setSelectedAccount] = useState<Account | null>(null);
  
  // Track expanded folders for each account
  const [expandedAccounts, setExpandedAccounts] = useState<Record<string, boolean>>({});
  
  // Update account folders when mailboxes change - update this to maintain account IDs
  useEffect(() => {
    console.log('Mailboxes updated:', mailboxes);
    setAccounts(prev => {
      const updated = [...prev];
      if (updated.length > 1) {
        // Only update folders, preserve other properties including ID
        if (updated[1]) {
          updated[1] = {
            ...updated[1],
            folders: mailboxes
          };
        }
        console.log('Updated accounts with new mailboxes:', updated);
      }
      return updated;
    });
  }, [mailboxes]);
  
  // Debug accounts state
  useEffect(() => {
    console.log('Current accounts state:', accounts);
  }, [accounts]);
  
  // Debug selectedAccount state
  useEffect(() => {
    console.log('Selected account changed:', selectedAccount);
    if (selectedAccount) {
      console.log('Selected account folders:', selectedAccount.folders);
    }
  }, [selectedAccount]);
  
  // Add useEffect for debugging
  useEffect(() => {
    if (typeof window !== 'undefined') {
      console.log('[DEBUG] Rendering UI with:', {
        accountsCount: accounts.length,
        selectedAccountId: selectedAccount?.id,
        showFolders,
        currentFolder
      });
    }
  }, [accounts, selectedAccount, showFolders, currentFolder]);
  
  // Calculate unread count (this would be replaced with actual data in production)
  useEffect(() => {
    // Example: counting unread emails in the inbox
    const unreadInInbox = (emails || []).filter(email => {
      // Access the 'read' property safely, handling both old and new email formats
      const emailWithFlags = email as unknown as EmailWithFlags;
      return (!emailWithFlags.read && emailWithFlags.read !== undefined) || 
             (emailWithFlags.flags && !emailWithFlags.flags.seen) || 
             false;
    }).filter(email => currentFolder === 'INBOX').length;
    setUnreadCount(unreadInInbox);
  }, [emails, currentFolder]);
  
  // Ensure accounts section is never empty
  useEffect(() => {
    // If accounts array becomes empty (bug), restore default accounts
    if (!accounts || accounts.length === 0) {
      console.warn('Accounts array is empty, restoring defaults');
      setAccounts([
        { id: 'all-accounts', name: 'All', email: '', color: 'bg-gray-500' },
        { id: 'loading-account', name: 'Loading...', email: '', color: 'bg-blue-500', folders: mailboxes }
      ]);
    }
  }, [accounts, mailboxes]);
  
  // Initialize session and start prefetching
  useEffect(() => {
    // Flag to prevent multiple initialization attempts
    let isMounted = true;
    let initAttempted = false;
    
    const initSession = async () => {
      if (initAttempted) return;
      initAttempted = true;
      
      try {
        setLoading(true);
        
        // First check if Redis is ready before making API calls
        const redisStatus = await fetch('/api/redis/status')
          .then(res => res.json())
          .catch(() => ({ ready: false }));
        
        if (!isMounted) return;
        
        // Call the session API to check email credentials and start prefetching
        const response = await fetch('/api/courrier/session');
        const data = await response.json();
        
        // Log the raw API response to inspect structure
        console.log('[DEBUG] Raw session API response:', JSON.stringify(data, null, 2));

        // Add detailed logging to inspect the accounts and folders structure
        console.log('=== SESSION API RESPONSE DETAILED INSPECTION ===');
        console.log('Session authenticated:', data.authenticated);
        console.log('Has email credentials:', data.hasEmailCredentials);
        console.log('Primary email:', data.email);
        console.log('Redis status:', data.redisStatus);

        // Log mailboxes structure - what the frontend used previously
        console.log('=== MAILBOXES STRUCTURE (OLD API FORMAT) ===');
        console.log('Global mailboxes exists:', !!data.mailboxes);
        console.log('Global mailboxes is array:', Array.isArray(data.mailboxes));
        console.log('Global mailboxes:', data.mailboxes);

        // Log allAccounts structure - the new per-account folders approach
        console.log('=== ALL ACCOUNTS STRUCTURE (NEW API FORMAT) ===');
        console.log('allAccounts exists:', !!data.allAccounts);
        console.log('allAccounts is array:', Array.isArray(data.allAccounts));
        console.log('allAccounts length:', data.allAccounts?.length || 0);

        // Inspect each account's structure
        if (data.allAccounts && Array.isArray(data.allAccounts)) {
          data.allAccounts.forEach((account: any, idx: number) => {
            console.log(`Account ${idx + 1}:`, {
              id: account.id,
              email: account.email,
              display_name: account.display_name,
              foldersExist: !!account.folders,
              foldersIsArray: Array.isArray(account.folders),
              foldersLength: account.folders?.length || 0,
              folders: account.folders
            });
          });
        }

        if (!isMounted) return;
        
        if (data.authenticated) {
          if (data.hasEmailCredentials) {
            console.log('Session initialized, prefetch status:', data.prefetchStarted ? 'running' : 'not started');
            setPrefetchStarted(Boolean(data.prefetchStarted));
            
            // Create a copy of the current accounts to update
            const updatedAccounts = [...accounts];
            
            // Check if we have multiple accounts returned
            if (data.allAccounts && Array.isArray(data.allAccounts) && data.allAccounts.length > 0) {
              console.log('[DEBUG] Multiple accounts found:', data.allAccounts.length);
              
              // First, validate the structure of each account
              data.allAccounts.forEach((account: any, index: number) => {
                console.log(`[DEBUG] Account ${index+1} structure check:`, {
                  id: account.id,
                  email: account.email,
                  display_name: account.display_name,
                  hasFolders: !!account.folders,
                  foldersIsArray: Array.isArray(account.folders),
                  foldersCount: Array.isArray(account.folders) ? account.folders.length : 0,
                  folders: account.folders || []
                });
              });
              
              // Keep the All account at position 0
              if (updatedAccounts.length > 0) {
                // Replace the loading account with the real one
                data.allAccounts.forEach((account: any, index: number) => {
                  // Ensure folders are valid
                  const accountFolders = (account.folders && Array.isArray(account.folders)) 
                    ? account.folders 
                    : (data.mailboxes && Array.isArray(data.mailboxes)) 
                      ? data.mailboxes 
                      : ['INBOX', 'Sent', 'Drafts', 'Trash', 'Junk'];
                  
                  // If we're updating the first real account (index 0 in API, position 1 in our array)
                  if (index === 0 && updatedAccounts.length > 1) {
                    // Update the loading account in place to maintain references
                    updatedAccounts[1] = {
                      id: account.id, // Use the real account ID
                      name: account.display_name || account.email,
                      email: account.email,
                      color: account.color || 'bg-blue-500',
                      folders: accountFolders
                    };
                    console.log(`[DEBUG] Updated loading account to real account: ${account.email} with ID ${account.id}`);
                  } else {
                    // Add additional accounts as new entries
                    updatedAccounts.push({
                      id: account.id || `account-${index}`,
                      name: account.display_name || account.email,
                      email: account.email,
                      color: account.color || 'bg-blue-500',
                      folders: accountFolders
                    });
                  }
                });
              } else {
                // Fallback if accounts array is empty for some reason
                updatedAccounts.push({ id: 'all-accounts', name: 'All', email: '', color: 'bg-gray-500' });
                
                const firstAccount = data.allAccounts[0];
                const accountFolders = (firstAccount.folders && Array.isArray(firstAccount.folders)) 
                  ? firstAccount.folders 
                  : (data.mailboxes && Array.isArray(data.mailboxes)) 
                    ? data.mailboxes 
                    : ['INBOX', 'Sent', 'Drafts', 'Trash', 'Junk'];
                
                updatedAccounts.push({
                  id: firstAccount.id,
                  name: firstAccount.display_name || firstAccount.email,
                  email: firstAccount.email,
                  color: firstAccount.color || 'bg-blue-500',
                  folders: accountFolders
                });
              }
            } else if (data.email) {
              // Fallback to single account if allAccounts is not available
              console.log(`[DEBUG] Fallback to single account: ${data.email}`);
              
              // Force include some hardcoded folders if none are present
              const fallbackFolders = ['INBOX', 'Sent', 'Drafts', 'Trash', 'Junk'];
              
              // Prioritize mailboxes from IMAP if available
              const folderList = (data.mailboxes && data.mailboxes.length > 0) ? 
                data.mailboxes : fallbackFolders;
              
              // Update the loading account if it exists
              if (updatedAccounts.length > 1) {
                updatedAccounts[1] = {
                  id: 'default-account', // Use consistent ID
                  name: data.displayName || data.email,
                  email: data.email,
                  color: 'bg-blue-500',
                  folders: folderList
                };
              } else {
                // Fallback if accounts array is empty
                updatedAccounts.push({ id: 'all-accounts', name: 'All', email: '', color: 'bg-gray-500' });
                updatedAccounts.push({
                  id: 'default-account',
                  name: data.displayName || data.email,
                  email: data.email,
                  color: 'bg-blue-500',
                  folders: folderList
                });
              }
            }
            
            console.log('Setting accounts:', updatedAccounts);
            
            // Debug each account's folders
            updatedAccounts.forEach((acc: Account, idx: number) => {
              console.log(`Account ${idx + 1}: ${acc.name} (${acc.email}) - Folders:`, 
                acc.folders ? acc.folders.length : 0, 
                acc.folders || []);
            });
            
            // Update the accounts state
            setAccounts(updatedAccounts);
            
            // Auto-select the first non-All account if available
            if (updatedAccounts.length > 1) {
              console.log('Auto-selecting account:', updatedAccounts[1]);
              setSelectedAccount(updatedAccounts[1]);
              setShowFolders(true);
            }
            
            // Preload first page of emails for faster initial rendering
            if (session?.user?.id) {
              await loadEmails();
              
              // If the user hasn't opened this page recently, trigger a background refresh
              if (data.lastVisit && Date.now() - data.lastVisit > 5 * 60 * 1000) {
                // It's been more than 5 minutes, refresh in background
                try {
                  const refreshResponse = await fetch('/api/courrier/refresh', { 
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify({ folder: currentFolder })
                  });
                  console.log('Background refresh triggered');
                } catch (error) {
                  console.error('Failed to trigger background refresh', error);
                }
              }
            }
          } else {
            // User is authenticated but doesn't have email credentials
            setShowLoginNeeded(true);
          }
        }
      } catch (error) {
        console.error('Error initializing session:', error);
      } finally {
        if (isMounted) {
          setLoading(false);
        }
      }
    };
    
    if (session?.user?.id) {
      initSession();
    }
    
    return () => {
      isMounted = false;
    };
  }, [session?.user?.id, loadEmails]);
  
  // Helper to get folder icons
  const getFolderIcon = (folder: string) => {
    const folderLower = folder.toLowerCase();
    
    if (folderLower.includes('inbox')) {
      return <Inbox className="h-4 w-4 text-gray-500" />;
    } else if (folderLower.includes('sent')) {
      return <Send className="h-4 w-4 text-gray-500" />;
    } else if (folderLower.includes('trash')) {
      return <Trash className="h-4 w-4 text-gray-500" />;
    } else if (folderLower.includes('archive')) {
      return <Archive className="h-4 w-4 text-gray-500" />;
    } else if (folderLower.includes('draft')) {
      return <Edit className="h-4 w-4 text-gray-500" />;
    } else if (folderLower.includes('spam') || folderLower.includes('junk')) {
      return <AlertOctagon className="h-4 w-4 text-gray-500" />;
    } else {
      return <Folder className="h-4 w-4 text-gray-500" />;
    }
  };
  
  // Helper to format folder names
  const formatFolderName = (folder: string) => {
    return folder.charAt(0).toUpperCase() + folder.slice(1).toLowerCase();
  };
  
  // Check for more emails
  const hasMoreEmails = page < totalPages;

  // Handle loading more emails on scroll
  const handleLoadMore = () => {
    if (hasMoreEmails && !isLoading) {
      // Increment the page
      const nextPage = page + 1;
      setPage(nextPage);
      
      // Also prefetch additional pages to make scrolling smoother
      if (session?.user?.id) {
        // Prefetch next 2 pages beyond the current next page
        prefetchFolderEmails(
          session.user.id, 
          currentFolder, 
          2, 
          nextPage + 1, 
          selectedAccount?.id
        ).catch(err => {
          console.error(`Error prefetching additional pages for ${currentFolder}:`, err);
        });
      }
      
      // Note: loadEmails will be called automatically due to the page dependency in useEffect
    }
  };

  // Handle bulk actions
  const handleBulkAction = async (action: 'delete' | 'mark-read' | 'mark-unread' | 'archive') => {
    if (selectedEmailIds.length === 0) return;
    
    switch (action) {
      case 'delete':
        setShowDeleteConfirm(true);
        break;
        
      case 'mark-read':
        // Mark all selected emails as read
        for (const emailId of selectedEmailIds) {
          await markEmailAsRead(emailId, true);
        }
        break;
        
      case 'mark-unread':
        // Mark all selected emails as unread
        for (const emailId of selectedEmailIds) {
          await markEmailAsRead(emailId, false);
        }
        break;
        
      case 'archive':
        // Archive functionality would be implemented here
        break;
    }
  };

  // Handle email actions
  const handleReply = () => {
    if (!selectedEmail) return;
    setComposeType('reply');
    setShowComposeModal(true);
  };
  
  const handleReplyAll = () => {
    if (!selectedEmail) return;
    setComposeType('reply-all');
    setShowComposeModal(true);
  };
  
  const handleForward = () => {
    if (!selectedEmail) return;
    setComposeType('forward');
    setShowComposeModal(true);
  };
  
  const handleComposeNew = () => {
    setComposeType('new');
    setShowComposeModal(true);
  };
  
  // Handle mailbox change with prefetching
  const handleMailboxChange = (folder: string, accountId?: string) => {
    // Reset to page 1 when changing folders
    setPage(1);
    
    // If we have a specific accountId, store it with the folder
    if (accountId) {
      // Store the current account ID with the folder change
      console.log(`Changing folder to ${folder} for account ${accountId}`);
    }
    
    // Change folder in the state
    changeFolder(folder);
    setCurrentView(folder);
    
    // Start prefetching additional pages for this folder
    if (session?.user?.id && folder) {
      // First two pages are most important - prefetch immediately
      prefetchFolderEmails(session.user.id, folder, 3, 1, accountId).catch(err => {
        console.error(`Error prefetching ${folder}:`, err);
      });
    }
  };

  // Handle sending email
  const handleSendEmail = async (emailData: EmailData) => {
    return await sendEmail(emailData);
  };

  // Handle delete confirmation
  const handleDeleteConfirm = async () => {
    await deleteEmails(selectedEmailIds);
    setShowDeleteConfirm(false);
  };
  
  // Check login on mount
  useEffect(() => {
    // Check if the user is logged in after a short delay
    const timer = setTimeout(() => {
      if (error?.includes('Not authenticated') || error?.includes('No email credentials found')) {
        setShowLoginNeeded(true);
      }
    }, 2000);
    
    return () => clearTimeout(timer);
  }, [error]);

  // Go to login page
  const handleGoToLogin = () => {
    router.push('/courrier/login');
  };

  // Extra debugging for folder rendering
  useEffect(() => {
    if (selectedAccount && showFolders) {
      console.log('Folder rendering debug:',
        'account:', selectedAccount.id,
        'folders:', selectedAccount.folders?.length || 0,
        'showFolders:', showFolders
      );
    }
  }, [selectedAccount, showFolders]);

  return (
    <>
      <SimplifiedLoadingFix />
      
      {/* Main layout */}
      <main className="w-full h-screen bg-black">
        <div className="w-full h-full px-4 pt-12 pb-4">
          <div className="flex h-full bg-carnet-bg">
            {/* Panel 1: Sidebar - Always visible */}
            <div className="w-60 bg-white/95 backdrop-blur-sm border-r border-gray-100 flex flex-col md:flex" style={{display: "flex !important"}}>
              {/* Courrier Title */}
              <div className="p-3 border-b border-gray-100">
                <div className="flex items-center gap-2">
                  <Mail className="h-6 w-6 text-gray-600" />
                  <span className="text-xl font-semibold text-gray-900">COURRIER</span>
                </div>
              </div>

              {/* Compose button and refresh button */}
              <div className="p-2 border-b border-gray-100 flex items-center gap-2">
                <Button 
                  className="flex-1 bg-blue-600 text-white rounded-lg hover:bg-blue-700 flex items-center justify-center transition-all py-1.5 text-sm"
                  onClick={handleComposeNew}
                >
                  <div className="flex items-center gap-2">
                    <PlusIcon className="h-3.5 w-3.5" />
                    <span>Compose</span>
                  </div>
                </Button>
                <Button 
                  variant="ghost" 
                  size="icon"
                  className="h-9 w-9 text-gray-400 hover:text-gray-600"
                  onClick={() => {
                    setLoading(true);
                    // Reset to page 1 when manually refreshing
                    setPage(1);
                    // Load emails
                    loadEmails().finally(() => setLoading(false));
                  }}
                >
                  <RefreshCw className={`h-4 w-4 ${loading ? 'animate-spin' : ''}`} />
                </Button>
              </div>

              {/* Scrollable area for accounts and folders */}
              <div className="flex-1 overflow-y-auto">
                {/* Accounts Section */}
                <div className="p-3 border-b border-gray-100">
                  <div className="flex items-center justify-between mb-2">
                    <Button 
                      variant="ghost"
                      className="w-full justify-between text-sm font-medium text-gray-500"
                      onClick={() => setAccountsDropdownOpen(!accountsDropdownOpen)}
                    >
                      <span>Accounts</span>
                      {accountsDropdownOpen ? <ChevronUp className="h-4 w-4" /> : <ChevronDown className="h-4 w-4" />}
                    </Button>
                    <Button
                      variant="ghost"
                      size="sm"
                      className="h-7 w-7 p-0 text-gray-400 hover:text-gray-600"
                      onClick={() => setShowAddAccountForm(!showAddAccountForm)}
                    >
                      <Plus className="h-4 w-4" />
                    </Button>
                  </div>
                  
                  {/* Display all accounts */}
                  <div className="mt-1">
                    {/* Form for adding a new account */}
                    {showAddAccountForm && (
                      <div className="mb-2 p-2 border border-gray-200 rounded-md bg-white">
                        <h4 className="text-xs font-medium mb-0.5 text-gray-700">Add IMAP Account</h4>
                        <form onSubmit={async (e) => {
                          e.preventDefault();
                          setLoading(true);
                          
                          const formData = new FormData(e.currentTarget);
                          
                          // Pull values from form with proper type handling
                          const formValues = {
                            email: formData.get('email')?.toString() || '',
                            password: formData.get('password')?.toString() || '',
                            host: formData.get('host')?.toString() || '',
                            port: parseInt(formData.get('port')?.toString() || '993'),
                            secure: formData.get('secure') === 'on',
                            display_name: formData.get('display_name')?.toString() || '',
                            smtp_host: formData.get('smtp_host')?.toString() || '',
                            smtp_port: formData.get('smtp_port')?.toString() ? 
                              parseInt(formData.get('smtp_port')?.toString() || '587') : undefined,
                            smtp_secure: formData.get('smtp_secure') === 'on'
                          };
                          
                          // If display_name is empty, use email
                          if (!formValues.display_name) {
                            formValues.display_name = formValues.email;
                          }
                          
                          try {
                            // First test the connection
                            const testResponse = await fetch('/api/courrier/test-connection', {
                              method: 'POST',
                              headers: {
                                'Content-Type': 'application/json'
                              },
                              body: JSON.stringify({
                                email: formValues.email,
                                password: formValues.password,
                                host: formValues.host,
                                port: formValues.port,
                                secure: formValues.secure
                              })
                            });
                            
                            const testResult = await testResponse.json();
                            
                            if (!testResponse.ok) {
                              throw new Error(testResult.error || 'Connection test failed');
                            }
                            
                            console.log('Connection test successful:', testResult);
                            
                            // If connection test is successful, save the account
                            const saveResponse = await fetch('/api/courrier/account', {
                              method: 'POST',
                              headers: {
                                'Content-Type': 'application/json'
                              },
                              body: JSON.stringify(formValues)
                            });
                            
                            const saveResult = await saveResponse.json();
                            
                            if (!saveResponse.ok) {
                              throw new Error(saveResult.error || 'Failed to add account');
                            }
                            
                            // Update accounts list
                            const newAccountObj = {
                              id: `account-${Date.now()}`, // generate unique string ID
                              name: formValues.display_name,
                              email: formValues.email,
                              color: `bg-blue-500`, // Default color class
                              folders: testResult.details.sampleFolders || ['INBOX', 'Sent', 'Drafts', 'Trash'] // Use discovered folders or defaults
                            };
                            
                            setAccounts(prev => [...prev, newAccountObj]);
                            setShowAddAccountForm(false);
                            toast({
                              title: "Account added successfully",
                              description: `Your email account ${formValues.email} has been added.`,
                              duration: 5000
                            });
                          } catch (error) {
                            console.error('Error adding account:', error);
                            toast({
                              title: "Failed to add account",
                              description: error instanceof Error ? error.message : 'Unknown error',
                              variant: "destructive",
                              duration: 5000
                            });
                          } finally {
                            setLoading(false);
                          }
                        }}>
                          <div>
                            <Tabs defaultValue="imap" className="w-full">
                              <TabsList className="grid w-full grid-cols-2 h-6 mb-0.5 bg-gray-100">
                                <TabsTrigger value="imap" className="text-xs h-5 data-[state=active]:bg-blue-500 data-[state=active]:text-white">IMAP</TabsTrigger>
                                <TabsTrigger value="smtp" className="text-xs h-5 data-[state=active]:bg-blue-500 data-[state=active]:text-white">SMTP</TabsTrigger>
                              </TabsList>
                              
                              <TabsContent value="imap" className="mt-0.5 space-y-0.5">
                                <div>
                                  <Input 
                                    id="email" 
                                    name="email" 
                                    placeholder="email@example.com" 
                                    className="h-7 text-xs bg-white border-gray-300 mb-0.5 text-gray-900" 
                                    required 
                                  />
                                </div>
                                <div>
                                  <Input 
                                    id="password" 
                                    name="password" 
                                    type="password" 
                                    placeholder="•••••••••" 
                                    className="h-7 text-xs bg-white border-gray-300 mb-0.5 text-gray-900" 
                                    required 
                                  />
                                </div>
                                <div>
                                  <Input 
                                    id="display_name" 
                                    name="display_name" 
                                    placeholder="John Doe" 
                                    className="h-7 text-xs bg-white border-gray-300 mb-0.5 text-gray-900" 
                                  />
                                </div>
                                <div>
                                  <Input 
                                    id="host" 
                                    name="host" 
                                    placeholder="imap.example.com" 
                                    className="h-7 text-xs bg-white border-gray-300 mb-0.5 text-gray-900" 
                                    required 
                                  />
                                </div>
                                <div className="flex gap-1">
                                  <div className="flex-1">
                                    <Input 
                                      id="port" 
                                      name="port" 
                                      placeholder="993" 
                                      className="h-7 text-xs bg-white border-gray-300 text-gray-900" 
                                      defaultValue="993"
                                      required 
                                    />
                                  </div>
                                  <div className="flex items-center pl-1">
                                    <div className="flex items-center space-x-1">
                                      <Checkbox id="secure" name="secure" defaultChecked />
                                      <Label htmlFor="secure" className="text-xs">SSL</Label>
                                    </div>
                                  </div>
                                </div>
                              </TabsContent>
                              
                              <TabsContent value="smtp" className="mt-0.5 space-y-0.5">
                                <div>
                                  <Input 
                                    id="smtp_host" 
                                    name="smtp_host" 
                                    placeholder="smtp.example.com" 
                                    className="h-7 text-xs bg-white border-gray-300 mb-0.5 text-gray-900"
                                  />
                                </div>
                                <div className="flex gap-1">
                                  <div className="flex-1">
                                    <Input 
                                      id="smtp_port" 
                                      name="smtp_port" 
                                      placeholder="587" 
                                      className="h-7 text-xs bg-white border-gray-300 text-gray-900" 
                                      defaultValue="587"
                                    />
                                  </div>
                                  <div className="flex items-center pl-1">
                                    <div className="flex items-center space-x-1">
                                      <Checkbox id="smtp_secure" name="smtp_secure" defaultChecked />
                                      <Label htmlFor="smtp_secure" className="text-xs">SSL</Label>
                                    </div>
                                  </div>
                                </div>
                                <div className="text-xs text-gray-500 italic">
                                  Note: SMTP settings needed for sending emails
                                </div>
                              </TabsContent>
                            </Tabs>
                            
                            <div className="flex gap-1 mt-1">
                              <Button
                                type="submit"
                                className="flex-1 h-6 text-xs bg-blue-500 hover:bg-blue-600 text-white rounded-md px-2 py-0"
                                disabled={loading}
                              >
                                {loading ? <Loader2 className="h-3 w-3 animate-spin mr-1" /> : null}
                                Test & Add
                              </Button>
                              <Button
                                type="button"
                                className="h-6 text-xs bg-gray-200 text-gray-800 hover:bg-gray-300 rounded-md px-2 py-0"
                                onClick={() => setShowAddAccountForm(false)}
                              >
                                Cancel
                              </Button>
                            </div>
                          </div>
                        </form>
                      </div>
                    )}
                    
                    {accounts.map((account) => (
                      <div key={account.id} className="mb-1">
                        <Button
                          variant="ghost"
                          className={`w-full justify-start text-xs ${selectedAccount?.id === account.id ? 'bg-gray-100' : ''}`}
                          onClick={() => {
                            setSelectedAccount(account);
                            setShowFolders(true);
                            // Auto-expand this account when selected
                            if (account.id !== 'all-accounts') {
                              setExpandedAccounts(prev => ({
                                ...prev,
                                [account.id]: true
                              }));
                            }
                            if (account.id === 'all-accounts') {
                              handleMailboxChange('INBOX');
                            } else {
                              handleMailboxChange('INBOX', account.id);
                            }
                          }}
                        >
                          <div className="flex items-center w-full">
                            <div className={`w-3 h-3 rounded-full ${account.color?.startsWith('#') ? 'bg-blue-500' : account.color || 'bg-blue-500'} mr-2`}></div>
                            <span className="truncate text-gray-700">{account.name}</span>
                            {account.id !== 'all-accounts' && (
                              <span
                                className="ml-auto text-gray-400 hover:text-gray-600 cursor-pointer"
                                onClick={(e) => {
                                  e.stopPropagation();
                                  // Toggle this specific account's expanded state
                                  setExpandedAccounts(prev => ({
                                    ...prev,
                                    [account.id]: !prev[account.id]
                                  }));
                                }}
                              >
                                {expandedAccounts[account.id] ? <ChevronUp className="h-3 w-3" /> : <ChevronDown className="h-3 w-3" />}
                              </span>
                            )}
                          </div>
                        </Button>
                        
                        {/* Show folders for this account if expanded */}
                        {expandedAccounts[account.id] && account.id !== 'all-accounts' && account.folders && (
                          <div className="pl-4">
                            {account.folders.map((folder) => (
                              <Button
                                key={folder}
                                variant="ghost"
                                className={`w-full justify-start text-xs py-1 h-7 ${currentFolder === folder ? 'bg-gray-100' : ''}`}
                                onClick={() => handleMailboxChange(folder, account.id !== 'all-accounts' ? account.id : undefined)}
                              >
                                <div className="flex items-center w-full">
                                  {getFolderIcon(folder)}
                                  <span className="ml-2 truncate text-gray-700">{formatFolderName(folder)}</span>
                                  {folder === 'INBOX' && unreadCount > 0 && (
                                    <span className="ml-auto bg-blue-500 text-white text-[10px] px-1.5 rounded-full">
                                      {unreadCount}
                                    </span>
                                  )}
                                </div>
                              </Button>
                            ))}
                          </div>
                        )}
                      </div>
                    ))}
                  </div>
                </div>
              </div>
            </div>

            {/* Panel 2: Email List - Always visible */}
            <div className="w-80 flex flex-col border-r border-gray-100 overflow-hidden">
              {/* Header without search bar or profile */}
              <div className="p-2 border-b border-gray-100 bg-white flex items-center justify-between">
                <Button 
                  variant="ghost" 
                  size="icon"
                  className="md:hidden h-9 w-9"
                  onClick={() => setMobileSidebarOpen(!mobileSidebarOpen)}
                >
                  <Menu className="h-5 w-5 text-gray-500" />
                </Button>
                
                <div className="flex-1">
                  <div className="flex items-center">
                    {getFolderIcon(currentFolder)}
                    <span className="ml-2 font-medium text-gray-700">{formatFolderName(currentFolder)}</span>
                  </div>
                </div>
                
                <div className="flex items-center">
                  {selectedEmailIds.length > 0 && (
                    <div className="flex items-center space-x-1">
                      <Button
                        variant="ghost"
                        size="icon"
                        className="h-8 w-8"
                        onClick={() => handleBulkAction('mark-read')}
                      >
                        <MessageSquare className="h-4 w-4 text-gray-500" />
                      </Button>
                      <Button
                        variant="ghost"
                        size="icon"
                        className="h-8 w-8"
                        onClick={() => handleBulkAction('delete')}
                      >
                        <Trash className="h-4 w-4 text-gray-500" />
                      </Button>
                      <Button
                        variant="ghost"
                        size="icon"
                        className="h-8 w-8"
                        onClick={() => handleBulkAction('archive')}
                      >
                        <Archive className="h-4 w-4 text-gray-500" />
                      </Button>
                    </div>
                  )}
                </div>
              </div>
              
              {/* Email List - Always visible */}
              <div className="flex-1 overflow-hidden bg-white">
                {isLoading ? (
                  <div className="h-full flex items-center justify-center">
                    <div className="flex flex-col items-center">
                      <Loader2 className="h-8 w-8 text-blue-500 animate-spin mb-2" />
                      <p className="text-sm text-gray-500">Loading emails...</p>
                    </div>
                  </div>
                ) : error ? (
                  <div className="h-full flex items-center justify-center">
                    <div className="max-w-md p-4">
                      <Alert variant="destructive">
                        <AlertCircle className="h-4 w-4" />
                        <AlertTitle>Error</AlertTitle>
                        <AlertDescription>
                          {error}
                          {(error?.includes('Not authenticated') || error?.includes('No email credentials found')) && (
                            <Button 
                              variant="outline" 
                              size="sm" 
                              className="mt-2"
                              onClick={handleGoToLogin}
                            >
                              Go to login
                            </Button>
                          )}
                        </AlertDescription>
                      </Alert>
                    </div>
                  </div>
                ) : (
                  <div className="h-full overflow-hidden flex flex-col">
                    {/* Email List */}
                    <div className="flex-1 overflow-y-auto">
                      {emails.length === 0 ? (
                        <div className="h-full flex items-center justify-center">
                          <div className="text-center p-6">
                            <Inbox className="h-12 w-12 text-gray-300 mx-auto mb-4" />
                            <h3 className="text-lg font-medium text-gray-700">No emails found</h3>
                            <p className="text-sm text-gray-500 mt-1">
                              {searchQuery 
                                ? `No results found for "${searchQuery}"`
                                : `Your ${currentFolder.toLowerCase()} is empty`}
                            </p>
                          </div>
                        </div>
                      ) : (
                        <EmailList 
                          emails={emails} 
                          selectedEmailIds={selectedEmailIds}
                          selectedEmail={selectedEmail}
                          onSelectEmail={handleEmailSelect}
                          onToggleSelect={toggleEmailSelection}
                          onToggleSelectAll={toggleSelectAll}
                          onToggleStarred={toggleStarred}
                          onLoadMore={handleLoadMore}
                          hasMoreEmails={page < totalPages}
                          currentFolder={currentFolder}
                          isLoading={isLoading}
                          totalEmails={emails.length}
                          onBulkAction={handleBulkAction}
                        />
                      )}
                    </div>
                  </div>
                )}
              </div>
            </div>
            
            {/* Panel 3: Email Detail - Always visible */}
            <div className="flex-1 flex flex-col overflow-hidden">
              {/* Content for Panel 3 based on state but always visible */}
              <div className="flex-1 overflow-hidden bg-white">
                {selectedEmail ? (
                  <EmailDetailView 
                    email={selectedEmail} 
                    onBack={() => {
                      handleEmailSelect('');
                      // Ensure sidebar stays visible
                      setSidebarOpen(true);
                    }}
                    onReply={handleReply}
                    onReplyAll={handleReplyAll}
                    onForward={handleForward}
                    onToggleStar={() => toggleStarred(selectedEmail.id)}
                  />
                ) : (
                  <div className="h-full flex items-center justify-center">
                    <div className="text-center text-muted-foreground">
                      <p>Select an email to view or</p>
                      <button 
                        className="text-primary mt-2 hover:underline"
                        onClick={() => {
                          setComposeType('new');
                          setShowComposeModal(true);
                        }}
                      >
                        Compose a new message
                      </button>
                    </div>
                  </div>
                )}
              </div>
            </div>
          </div>
        </div>
      </main>
      
      {/* Modals and Dialogs */}
      <DeleteConfirmDialog 
        show={showDeleteConfirm}
        selectedCount={selectedEmailIds.length}
        onConfirm={handleDeleteConfirm}
        onCancel={() => setShowDeleteConfirm(false)}
      />
      
      <LoginNeededAlert 
        show={showLoginNeeded}
        onLogin={handleGoToLogin}
        onClose={() => setShowLoginNeeded(false)}
      />

      {/* Compose Email Dialog */}
      <Dialog open={showComposeModal} onOpenChange={(open) => !open && setShowComposeModal(false)}>
        <DialogContent className="sm:max-w-[800px] p-0 h-[80vh]">
          <DialogTitle asChild>
            <span className="sr-only">New Message</span>
          </DialogTitle>
          <ComposeEmail 
            type={composeType}
            initialEmail={composeType !== 'new' ? selectedEmail : undefined}
            onSend={handleSendEmail}
            onClose={() => setShowComposeModal(false)}
          />
        </DialogContent>
      </Dialog>
    </>
  );
}