@extends('layouts.app')

@section('title', 'Chat Management')
@section('subtitle', 'Monitor all conversations')

@section('content')
<div class="max-w-7xl mx-auto">
    <!-- Header -->
    <div class="mb-6 flex justify-between items-center">
        <div>
            <h1 class="text-2xl font-bold text-gray-900">Chat Management</h1>
            <p class="mt-1 text-sm text-gray-600">Monitor all buyer-seller conversations</p>
        </div>
    </div>

    <!-- Stats -->
    <div class="grid grid-cols-1 md:grid-cols-4 gap-6 mb-8">
        <div class="bg-white p-6 rounded-lg shadow">
            <div class="flex items-center">
                <div class="flex-shrink-0">
                    <svg class="w-8 h-8 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z"/>
                    </svg>
                </div>
                <div class="ml-4">
                    <p class="text-sm font-medium text-gray-600">Total Chats</p>
                    <p class="text-2xl font-bold text-gray-900">{{ $stats['total_chats'] }}</p>
                </div>
            </div>
        </div>

        <div class="bg-white p-6 rounded-lg shadow">
            <div class="flex items-center">
                <div class="flex-shrink-0">
                    <svg class="w-8 h-8 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"/>
                    </svg>
                </div>
                <div class="ml-4">
                    <p class="text-sm font-medium text-gray-600">Active Chats</p>
                    <p class="text-2xl font-bold text-gray-900">{{ $stats['active_chats'] }}</p>
                </div>
            </div>
        </div>

        <div class="bg-white p-6 rounded-lg shadow">
            <div class="flex items-center">
                <div class="flex-shrink-0">
                    <svg class="w-8 h-8 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 10h.01M12 10h.01M16 10h.01M9 16H5a2 2 0 01-2-2V6a2 2 0 012-2h14a2 2 0 012 2v8a2 2 0 01-2 2h-5l-5 5v-5z"/>
                    </svg>
                </div>
                <div class="ml-4">
                    <p class="text-sm font-medium text-gray-600">Total Messages</p>
                    <p class="text-2xl font-bold text-gray-900">{{ $stats['total_messages'] }}</p>
                </div>
            </div>
        </div>

        <div class="bg-white p-6 rounded-lg shadow">
            <div class="flex items-center">
                <div class="flex-shrink-0">
                    <svg class="w-8 h-8 text-orange-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"/>
                    </svg>
                </div>
                <div class="ml-4">
                    <p class="text-sm font-medium text-gray-600">Today's Messages</p>
                    <p class="text-2xl font-bold text-gray-900">{{ $stats['today_messages'] }}</p>
                </div>
            </div>
        </div>
    </div>

    <!-- Search and Filters -->
    <div class="mb-6 bg-white rounded-lg shadow p-4">
        <div class="flex flex-col md:flex-row md:items-center md:justify-between space-y-4 md:space-y-0">
            <div class="flex-1">
                <form action="{{ route('admin.chats.search') }}" method="GET">
                    <div class="flex space-x-4">
                        <div class="flex-1">
                            <input type="text" 
                                   name="search"
                                   value="{{ request('search') }}"
                                   placeholder="Search by buyer, seller, product name..."
                                   class="w-full px-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500">
                        </div>
                        <button type="submit" 
                                class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-2 rounded-lg font-medium flex items-center transition-colors">
                            <svg class="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z"/>
                            </svg>
                            Search
                        </button>
                        @if(request('search'))
                            <a href="{{ route('admin.chats.index') }}" 
                               class="bg-gray-600 hover:bg-gray-700 text-white px-4 py-2 rounded-lg font-medium flex items-center transition-colors">
                                Clear
                            </a>
                        @endif
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- Chats Table -->
    <div class="bg-white shadow overflow-hidden sm:rounded-lg">
        <div class="px-4 py-5 sm:px-6 border-b border-gray-200">
            <h3 class="text-lg leading-6 font-medium text-gray-900">All Conversations</h3>
            <p class="mt-1 max-w-2xl text-sm text-gray-500">List of all buyer-seller conversations in the system.</p>
        </div>

        @if($chats->count() > 0)
            <div class="overflow-x-auto">
                <table class="min-w-full divide-y divide-gray-200">
                    <thead class="bg-gray-50">
                        <tr>
                            <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Participants</th>
                            <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Product</th>
                            <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Last Message</th>
                            <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Status</th>
                            <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Messages</th>
                            <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Actions</th>
                        </tr>
                    </thead>
                    <tbody class="bg-white divide-y divide-gray-200">
                        @foreach($chats as $chat)
                            @php
                                $messageCount = $chat->messages()->count();
                                $unreadCount = $chat->unreadMessages()->count();
                            @endphp
                            <tr class="hover:bg-gray-50">
                                <td class="px-6 py-4 whitespace-nowrap">
                                    <div class="flex items-center">
                                        <div class="flex-shrink-0 h-10 w-10 flex items-center space-x-2">
                                            <div class="h-8 w-8 rounded-full bg-blue-100 flex items-center justify-center" title="Buyer: {{ $chat->buyer->name }}">
                                                <span class="text-blue-600 font-medium text-xs">
                                                    {{ strtoupper(substr($chat->buyer->name, 0, 1)) }}
                                                </span>
                                            </div>
                                            <svg class="h-4 w-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14 5l7 7m0 0l-7 7m7-7H3"/>
                                            </svg>
                                            <div class="h-8 w-8 rounded-full bg-green-100 flex items-center justify-center" title="Seller: {{ $chat->seller->name }}">
                                                <span class="text-green-600 font-medium text-xs">
                                                    {{ strtoupper(substr($chat->seller->name, 0, 1)) }}
                                                </span>
                                            </div>
                                        </div>
                                        <div class="ml-4">
                                            <div class="text-sm font-medium text-gray-900">
                                                {{ $chat->buyer->name }} 
                                                @if($chat->buyer->company_name)
                                                    <span class="text-gray-500">({{ $chat->buyer->company_name }})</span>
                                                @endif
                                            </div>
                                            <div class="text-sm text-gray-500">
                                                {{ $chat->seller->name }}
                                                @if($chat->seller->company_name)
                                                    <span class="text-gray-400">({{ $chat->seller->company_name }})</span>
                                                @endif
                                            </div>
                                        </div>
                                    </div>
                                </td>
                                <td class="px-6 py-4 whitespace-nowrap">
                                    <div class="text-sm font-medium text-gray-900">{{ Str::limit($chat->product->name, 30) }}</div>
                                    <div class="text-sm text-gray-500">${{ number_format($chat->product->price, 2) }}</div>
                                </td>
                                <td class="px-6 py-4 whitespace-nowrap">
                                    <div class="text-sm text-gray-900">
                                        @if($chat->last_message)
                                            {{ Str::limit($chat->last_message, 50) }}
                                        @else
                                            <span class="text-gray-400">No messages yet</span>
                                        @endif
                                    </div>
                                    <div class="text-sm text-gray-500">
                                        @if($chat->last_message_at)
                                            {{ $chat->last_message_at->diffForHumans() }}
                                        @endif
                                    </div>
                                </td>
                                <td class="px-6 py-4 whitespace-nowrap">
                                    <span class="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium {{ $chat->status === 'active' ? 'bg-green-100 text-green-800' : ($chat->status === 'closed' ? 'bg-gray-100 text-gray-800' : 'bg-yellow-100 text-yellow-800') }}">
                                        {{ ucfirst($chat->status) }}
                                    </span>
                                </td>
                                <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-900">
                                    <div class="flex items-center space-x-2">
                                        <span>{{ $messageCount }} total</span>
                                        @if($unreadCount > 0)
                                            <span class="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-red-100 text-red-800">
                                                {{ $unreadCount }} unread
                                            </span>
                                        @endif
                                    </div>
                                </td>
                                <td class="px-6 py-4 whitespace-nowrap text-sm font-medium">
                                    <div class="flex space-x-2">
                                        <button onclick="viewChat({{ $chat->id }})" 
                                                class="text-blue-600 hover:text-blue-900 bg-blue-100 hover:bg-blue-200 px-3 py-1 rounded text-sm transition-colors">
                                            View Chat
                                        </button>
                                        <form action="{{ route('admin.chats.delete', $chat) }}" method="POST" class="inline">
                                            @csrf
                                            @method('DELETE')
                                            <button type="submit" 
                                                    onclick="return confirm('Are you sure you want to delete this chat? All messages will be permanently deleted.')"
                                                    class="text-red-600 hover:text-red-900 bg-red-100 hover:bg-red-200 px-3 py-1 rounded text-sm transition-colors">
                                                Delete
                                            </button>
                                        </form>
                                    </div>
                                </td>
                            </tr>
                        @endforeach
                    </tbody>
                </table>
            </div>
        @else
            <div class="text-center py-12">
                <svg class="mx-auto h-12 w-12 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z"/>
                </svg>
                <h3 class="mt-2 text-sm font-medium text-gray-900">No conversations found</h3>
                <p class="mt-1 text-sm text-gray-500">
                    @if(request('search'))
                        Try adjusting your search terms.
                    @else
                        There are no conversations in the system yet.
                    @endif
                </p>
            </div>
        @endif
    </div>

    <!-- Pagination -->
    @if($chats->count() > 0)
        <div class="mt-4">
            {{ $chats->links() }}
        </div>
    @endif
</div>

<!-- Chat Modal -->
<div id="chatModal" class="fixed inset-0 bg-black bg-opacity-75 flex items-center justify-center z-50 hidden">
    <div class="bg-white rounded-lg max-w-6xl w-full mx-4 max-h-[90vh] overflow-hidden flex flex-col">
        <div class="flex justify-between items-center p-6 border-b border-gray-200">
            <h3 class="text-lg font-medium text-gray-900">Chat Conversation</h3>
            <button type="button" onclick="closeChatModal()" class="text-gray-400 hover:text-gray-600">
                <svg class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
                </svg>
            </button>
        </div>
        
        <div class="flex-1 overflow-hidden flex">
            <!-- Chat Info Sidebar -->
            <div class="w-80 border-r border-gray-200 bg-gray-50 p-6">
                <div id="chatInfo" class="space-y-6">
                    <!-- Loading state -->
                    <div class="text-center py-8">
                        <div class="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-600 mx-auto"></div>
                        <p class="mt-2 text-sm text-gray-600">Loading chat information...</p>
                    </div>
                </div>
            </div>

            <!-- Messages Area -->
            <div class="flex-1 flex flex-col">
                <!-- Messages Container -->
                <div id="messagesContainer" class="flex-1 overflow-y-auto p-6 space-y-4 bg-white">
                    <!-- Loading state -->
                    <div class="text-center py-8">
                        <div class="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-600 mx-auto"></div>
                        <p class="mt-2 text-sm text-gray-600">Loading messages...</p>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<script>
function viewChat(chatId) {
    openChatModal();
    loadChatData(chatId);
}

function openChatModal() {
    const modal = document.getElementById('chatModal');
    modal.classList.remove('hidden');
    document.body.style.overflow = 'hidden';
}

function closeChatModal() {
    const modal = document.getElementById('chatModal');
    modal.classList.add('hidden');
    document.body.style.overflow = 'auto';
}

function loadChatData(chatId) {
    // Show loading states
    document.getElementById('chatInfo').innerHTML = `
        <div class="text-center py-8">
            <div class="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-600 mx-auto"></div>
            <p class="mt-2 text-sm text-gray-600">Loading chat information...</p>
        </div>
    `;
    
    document.getElementById('messagesContainer').innerHTML = `
        <div class="text-center py-8">
            <div class="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-600 mx-auto"></div>
            <p class="mt-2 text-sm text-gray-600">Loading messages...</p>
        </div>
    `;

    fetch(`/admin/chats/${chatId}/ajax`)
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                updateChatInfo(data.chat);
                updateMessages(data.messages);
            }
        })
        .catch(error => {
            console.error('Error loading chat:', error);
            document.getElementById('chatInfo').innerHTML = `
                <div class="text-center py-8 text-red-600">
                    <p>Error loading chat data. Please try again.</p>
                </div>
            `;
        });
}

function updateChatInfo(chat) {
    const chatInfoHTML = `
        <div class="space-y-6">
            <!-- Status -->
            <div>
                <label class="block text-sm font-medium text-gray-700 mb-2">Chat Status</label>
                <div class="flex items-center space-x-2">
                    <span class="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium ${chat.status === 'active' ? 'bg-green-100 text-green-800' : (chat.status === 'closed' ? 'bg-gray-100 text-gray-800' : 'bg-yellow-100 text-yellow-800')}">
                        ${chat.status}
                    </span>
                    <select id="statusSelect" onchange="updateChatStatus(${chat.id}, this.value)" 
                            class="text-xs border border-gray-300 rounded px-2 py-1">
                        <option value="active" ${chat.status === 'active' ? 'selected' : ''}>Active</option>
                        <option value="closed" ${chat.status === 'closed' ? 'selected' : ''}>Closed</option>
                        <option value="archived" ${chat.status === 'archived' ? 'selected' : ''}>Archived</option>
                    </select>
                </div>
            </div>

            <!-- Product Info -->
            <div>
                <label class="block text-sm font-medium text-gray-700 mb-2">Product</label>
                <div class="bg-white border border-gray-200 rounded-lg p-3">
                    <a href="${chat.product.url}" class="text-sm font-medium text-blue-600 hover:text-blue-500 block mb-1">
                        ${chat.product.name}
                    </a>
                    <p class="text-sm text-gray-600">$${parseFloat(chat.product.price).toFixed(2)}</p>
                </div>
            </div>

            <!-- Buyer Info -->
            <div>
                <label class="block text-sm font-medium text-gray-700 mb-2">Buyer</label>
                <div class="bg-white border border-gray-200 rounded-lg p-3">
                    <div class="flex items-center space-x-2 mb-2">
                        <div class="h-8 w-8 rounded-full bg-blue-100 flex items-center justify-center">
                            <span class="text-blue-600 font-medium text-xs">${chat.buyer.initial}</span>
                        </div>
                        <div>
                            <p class="text-sm font-medium text-gray-900">${chat.buyer.name}</p>
                            <p class="text-xs text-gray-500">${chat.buyer.email}</p>
                        </div>
                    </div>
                    ${chat.buyer.company_name ? `<p class="text-xs text-gray-600">${chat.buyer.company_name}</p>` : ''}
                </div>
            </div>

            <!-- Seller Info -->
            <div>
                <label class="block text-sm font-medium text-gray-700 mb-2">Seller</label>
                <div class="bg-white border border-gray-200 rounded-lg p-3">
                    <div class="flex items-center space-x-2 mb-2">
                        <div class="h-8 w-8 rounded-full bg-green-100 flex items-center justify-center">
                            <span class="text-green-600 font-medium text-xs">${chat.seller.initial}</span>
                        </div>
                        <div>
                            <p class="text-sm font-medium text-gray-900">${chat.seller.name}</p>
                            <p class="text-xs text-gray-500">${chat.seller.email}</p>
                        </div>
                    </div>
                    ${chat.seller.company_name ? `<p class="text-xs text-gray-600">${chat.seller.company_name}</p>` : ''}
                </div>
            </div>

            <!-- Last Activity -->
            <div>
                <label class="block text-sm font-medium text-gray-700 mb-2">Last Activity</label>
                <p class="text-sm text-gray-600">${chat.last_message_at || 'No activity'}</p>
            </div>
        </div>
    `;
    
    document.getElementById('chatInfo').innerHTML = chatInfoHTML;
}

function updateMessages(messages) {
    const messagesContainer = document.getElementById('messagesContainer');
    
    if (messages.length > 0) {
        let messagesHTML = '<div class="space-y-4">';
        
        messages.forEach(message => {
            const isBuyer = message.sender_email.includes('buyer') || !message.sender_email.includes('seller'); // Simple heuristic
            messagesHTML += `
                <div class="flex ${isBuyer ? 'justify-start' : 'justify-end'}">
                    <div class="max-w-md px-4 py-2 rounded-lg ${isBuyer ? 'bg-blue-50 border border-blue-200 text-gray-900' : 'bg-green-50 border border-green-200 text-gray-900'}">
                        <div class="flex items-center justify-between mb-1">
                            <span class="text-xs font-medium ${isBuyer ? 'text-blue-700' : 'text-green-700'}">
                                ${message.sender_name}
                            </span>
                            <span class="text-xs text-gray-500">${message.created_at}</span>
                        </div>
                        <p class="text-sm">${message.message}</p>
                        <div class="flex items-center justify-between mt-1">
                            <span class="text-xs text-gray-400">${message.human_time}</span>
                            ${message.is_read ? `
                                <svg class="w-3 h-3 text-gray-400" fill="currentColor" viewBox="0 0 20 20">
                                    <path fill-rule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clip-rule="evenodd"/>
                                </svg>
                            ` : ''}
                        </div>
                    </div>
                </div>
            `;
        });
        
        messagesHTML += '</div>';
        messagesContainer.innerHTML = messagesHTML;
        
        // Scroll to bottom
        messagesContainer.scrollTop = messagesContainer.scrollHeight;
    } else {
        messagesContainer.innerHTML = `
            <div class="text-center py-8">
                <svg class="mx-auto h-12 w-12 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z"/>
                </svg>
                <h3 class="mt-2 text-sm font-medium text-gray-900">No messages yet</h3>
                <p class="mt-1 text-sm text-gray-500">This conversation hasn't started yet.</p>
            </div>
        `;
    }
}

function updateChatStatus(chatId, status) {
    fetch(`/admin/chats/${chatId}/status`, {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
            'X-CSRF-TOKEN': '{{ csrf_token() }}'
        },
        body: JSON.stringify({
            status: status
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            // Update the status badge in the modal
            const statusBadge = document.querySelector('#chatInfo span');
            if (statusBadge) {
                statusBadge.className = `inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium ${
                    status === 'active' ? 'bg-green-100 text-green-800' : 
                    (status === 'closed' ? 'bg-gray-100 text-gray-800' : 'bg-yellow-100 text-yellow-800')
                }`;
                statusBadge.textContent = status;
            }
        }
    })
    .catch(error => {
        console.error('Error updating chat status:', error);
        alert('Failed to update chat status. Please try again.');
    });
}

// Close modal when clicking outside
document.getElementById('chatModal').addEventListener('click', function(e) {
    if (e.target === this) {
        closeChatModal();
    }
});

// Close modal with Escape key
document.addEventListener('keydown', function(e) {
    if (e.key === 'Escape') {
        closeChatModal();
    }
});
</script>
@endsection