@extends('admin.layout')

@section('content')
<div class="flex justify-between items-center mb-6">
    <h1 class="text-3xl font-bold text-gray-800">Subject Management</h1>
    <a href="{{ route('admin.subjects.create') }}" class="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-lg flex items-center">
        <i class="fas fa-plus mr-2"></i> Add New Subject
    </a>
</div>

<!-- Search and Filters -->
<div class="bg-white rounded-lg shadow p-6 mb-6">
    <form action="{{ route('admin.subjects.index') }}" method="GET" class="grid grid-cols-1 md:grid-cols-4 gap-4">
        <div>
            <label class="block text-sm font-medium text-gray-700 mb-1">Search</label>
            <input type="text" name="search" value="{{ request('search') }}" 
                   class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"
                   placeholder="Search subjects...">
        </div>
        
        <div>
            <label class="block text-sm font-medium text-gray-700 mb-1">Status</label>
            <select name="status" class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500">
                <option value="">All Status</option>
                <option value="active" {{ request('status') == 'active' ? 'selected' : '' }}>Active</option>
                <option value="inactive" {{ request('status') == 'inactive' ? 'selected' : '' }}>Inactive</option>
            </select>
        </div>
        
        <div class="flex items-end">
            <button type="submit" class="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-lg w-full">
                <i class="fas fa-filter mr-2"></i> Filter
            </button>
        </div>
    </form>
</div>

<!-- Subjects Table -->
<div class="bg-white rounded-lg shadow overflow-hidden">
    <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">Subject</th>
                    <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Code</th>
                    <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Tests</th>
                    <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Registrations</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">Created</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">
                @forelse($subjects as $subject)
                <tr class="hover:bg-gray-50">
                    <td class="px-6 py-4 whitespace-nowrap">
                        <div class="flex items-center">
                            @if($subject->image_url)
                            <div class="flex-shrink-0 h-10 w-10">
                                <img class="h-10 w-10 rounded-full object-cover" src="{{ $subject->image_url }}" alt="{{ $subject->name }}">
                            </div>
                            @else
                            <div class="flex-shrink-0 h-10 w-10 bg-blue-500 rounded-full flex items-center justify-center text-white font-bold" 
                                 style="{{ $subject->color ? 'background-color: ' . $subject->color : '' }}">
                                {{ substr($subject->name, 0, 1) }}
                            </div>
                            @endif
                            <div class="ml-4">
                                <div class="text-sm font-medium text-gray-900">
                                    {{ $subject->name }}
                                </div>
                                <div class="text-sm text-gray-500">{{ Str::limit($subject->description, 50) }}</div>
                            </div>
                        </div>
                    </td>
                    <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-900">
                        <code class="bg-gray-100 px-2 py-1 rounded">{{ $subject->code }}</code>
                    </td>
                    <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-900">
                        {{ $subject->tests_count ?? $subject->tests->count() }}
                    </td>
                    <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-900">
                        {{ $subject->subject_registrations_count ?? $subject->subjectRegistrations->count() }}
                    </td>
                    <td class="px-6 py-4 whitespace-nowrap">
                        <span class="px-2 inline-flex text-xs leading-5 font-semibold rounded-full 
                            {{ $subject->is_active ? 'bg-green-100 text-green-800' : 'bg-red-100 text-red-800' }}">
                            {{ $subject->is_active ? 'Active' : 'Inactive' }}
                        </span>
                    </td>
                    <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-500">
                        {{ $subject->created_at->format('M j, Y') }}
                    </td>
                    <td class="px-6 py-4 whitespace-nowrap text-sm font-medium">
                        <div class="flex space-x-2">
                            <a href="{{ route('admin.subjects.show', $subject) }}" 
                               class="text-blue-600 hover:text-blue-900" title="View">
                                <i class="fas fa-eye"></i>
                            </a>
                            <a href="{{ route('admin.subjects.edit', $subject) }}" 
                               class="text-green-600 hover:text-green-900" title="Edit">
                                <i class="fas fa-edit"></i>
                            </a>
                            <form action="{{ route('admin.subjects.toggle-status', $subject) }}" method="POST" class="inline">
                                @csrf
                                @method('PATCH')
                                <button type="submit" class="text-orange-600 hover:text-orange-900" 
                                        title="{{ $subject->is_active ? 'Deactivate' : 'Activate' }}">
                                    <i class="fas {{ $subject->is_active ? 'fa-eye-slash' : 'fa-eye' }}"></i>
                                </button>
                            </form>
                            <form action="{{ route('admin.subjects.destroy', $subject) }}" method="POST" class="inline">
                                @csrf
                                @method('DELETE')
                                <button type="submit" class="text-red-600 hover:text-red-900" 
                                        onclick="return confirm('Are you sure you want to delete this subject?')"
                                        title="Delete">
                                    <i class="fas fa-trash"></i>
                                </button>
                            </form>
                        </div>
                    </td>
                </tr>
                @empty
                <tr>
                    <td colspan="7" class="px-6 py-4 text-center text-sm text-gray-500">
                        No subjects found.
                    </td>
                </tr>
                @endforelse
            </tbody>
        </table>
    </div>
    
    <!-- Pagination -->
    <div class="bg-white px-4 py-3 border-t border-gray-200 sm:px-6">
        {{ $subjects->links() }}
    </div>
</div>

<!-- Quick Stats -->
<div class="grid grid-cols-1 md:grid-cols-4 gap-6 mt-6">
    <div class="bg-white rounded-lg shadow p-6">
        <div class="flex items-center">
            <div class="p-3 rounded-full bg-blue-100 text-blue-600">
                <i class="fas fa-book text-xl"></i>
            </div>
            <div class="ml-4">
                <h3 class="text-lg font-semibold text-gray-600">Total Subjects</h3>
                <p class="text-3xl font-bold text-gray-800">{{ $subjects->total() }}</p>
            </div>
        </div>
    </div>
    
    <div class="bg-white rounded-lg shadow p-6">
        <div class="flex items-center">
            <div class="p-3 rounded-full bg-green-100 text-green-600">
                <i class="fas fa-check-circle text-xl"></i>
            </div>
            <div class="ml-4">
                <h3 class="text-lg font-semibold text-gray-600">Active Subjects</h3>
                <p class="text-3xl font-bold text-gray-800">{{ $subjects->where('is_active', true)->count() }}</p>
            </div>
        </div>
    </div>
    
    <div class="bg-white rounded-lg shadow p-6">
        <div class="flex items-center">
            <div class="p-3 rounded-full bg-purple-100 text-purple-600">
                <i class="fas fa-file-alt text-xl"></i>
            </div>
            <div class="ml-4">
                <h3 class="text-lg font-semibold text-gray-600">Total Tests</h3>
                <p class="text-3xl font-bold text-gray-800">{{ $subjects->sum(function($subject) { return $subject->tests->count(); }) }}</p>
            </div>
        </div>
    </div>
    
    <div class="bg-white rounded-lg shadow p-6">
        <div class="flex items-center">
            <div class="p-3 rounded-full bg-yellow-100 text-yellow-600">
                <i class="fas fa-users text-xl"></i>
            </div>
            <div class="ml-4">
                <h3 class="text-lg font-semibold text-gray-600">Total Registrations</h3>
                <p class="text-3xl font-bold text-gray-800">{{ $subjects->sum(function($subject) { return $subject->subjectRegistrations->count(); }) }}</p>
            </div>
        </div>
    </div>
</div>
@endsection