@extends('layouts.dashboard')

@section('title', 'Admin Dashboard')

@section('page-content')
<div class="space-y-6">
    <!-- Page Header -->
    <div class="flex items-center justify-between">
        <div>
            <h1 class="text-3xl font-bold text-gray-900">Admin Dashboard</h1>
            <p class="text-gray-600 mt-1">Welcome back, {{ auth()->user()->name }}</p>
        </div>
        <div class="flex items-center space-x-3">
            @if($currentYear)
                <span class="px-4 py-2 bg-blue-100 text-blue-800 rounded-lg font-medium">
                    {{ $currentYear->name }}
                </span>
            @endif
            @if($currentSemester)
                <span class="px-4 py-2 bg-purple-100 text-purple-800 rounded-lg font-medium">
                    {{ $currentSemester->name }}
                </span>
            @endif
        </div>
    </div>

    <!-- Statistics Cards Grid -->
    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6">
        <!-- Total Students -->
        <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100 hover:shadow-md transition">
            <div class="flex items-center justify-between">
                <div>
                    <p class="text-sm font-medium text-gray-600">Total Students</p>
                    <p class="text-3xl font-bold text-gray-900 mt-2">{{ number_format($stats['total_students']) }}</p>
                    <p class="text-sm text-green-600 mt-2">
                        <span class="font-medium">{{ number_format($stats['active_students']) }}</span> active
                    </p>
                </div>
                <div class="w-14 h-14 bg-blue-100 rounded-full flex items-center justify-center">
                    <svg class="w-7 h-7 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path d="M12 14l9-5-9-5-9 5 9 5z"/>
                        <path d="M12 14l6.16-3.422a12.083 12.083 0 01.665 6.479A11.952 11.952 0 0012 20.055a11.952 11.952 0 00-6.824-2.998 12.078 12.078 0 01.665-6.479L12 14z"/>
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 14l9-5-9-5-9 5 9 5zm0 0l6.16-3.422a12.083 12.083 0 01.665 6.479A11.952 11.952 0 0012 20.055a11.952 11.952 0 00-6.824-2.998 12.078 12.078 0 01.665-6.479L12 14zm-4 6v-7.5l4-2.222"/>
                    </svg>
                </div>
            </div>
        </div>

        <!-- Total Staff -->
        <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100 hover:shadow-md transition">
            <div class="flex items-center justify-between">
                <div>
                    <p class="text-sm font-medium text-gray-600">Total Staff</p>
                    <p class="text-3xl font-bold text-gray-900 mt-2">{{ number_format($stats['total_staff']) }}</p>
                    <p class="text-sm text-green-600 mt-2">
                        <span class="font-medium">{{ number_format($stats['active_staff']) }}</span> active
                    </p>
                </div>
                <div class="w-14 h-14 bg-purple-100 rounded-full flex items-center justify-center">
                    <svg class="w-7 h-7 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17 20h5v-2a3 3 0 00-5.356-1.857M17 20H7m10 0v-2c0-.656-.126-1.283-.356-1.857M7 20H2v-2a3 3 0 015.356-1.857M7 20v-2c0-.656.126-1.283.356-1.857m0 0a5.002 5.002 0 019.288 0M15 7a3 3 0 11-6 0 3 3 0 016 0zm6 3a2 2 0 11-4 0 2 2 0 014 0zM7 10a2 2 0 11-4 0 2 2 0 014 0z"/>
                    </svg>
                </div>
            </div>
        </div>

        <!-- Programs & Courses -->
        <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100 hover:shadow-md transition">
            <div class="flex items-center justify-between">
                <div>
                    <p class="text-sm font-medium text-gray-600">Programs</p>
                    <p class="text-3xl font-bold text-gray-900 mt-2">{{ number_format($stats['total_programs']) }}</p>
                    <p class="text-sm text-gray-600 mt-2">
                        <span class="font-medium">{{ number_format($stats['total_courses']) }}</span> courses
                    </p>
                </div>
                <div class="w-14 h-14 bg-green-100 rounded-full flex items-center justify-center">
                    <svg class="w-7 h-7 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 6.253v13m0-13C10.832 5.477 9.246 5 7.5 5S4.168 5.477 3 6.253v13C4.168 18.477 5.754 18 7.5 18s3.332.477 4.5 1.253m0-13C13.168 5.477 14.754 5 16.5 5c1.747 0 3.332.477 4.5 1.253v13C19.832 18.477 18.247 18 16.5 18c-1.746 0-3.332.477-4.5 1.253"/>
                    </svg>
                </div>
            </div>
        </div>

        <!-- Pending Applications -->
        <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100 hover:shadow-md transition">
            <div class="flex items-center justify-between">
                <div>
                    <p class="text-sm font-medium text-gray-600">Pending Applications</p>
                    <p class="text-3xl font-bold text-gray-900 mt-2">{{ number_format($stats['pending_applications']) }}</p>
                    <a href="{{ route('applications.index') }}" class="text-sm text-blue-600 hover:text-blue-700 font-medium mt-2 inline-block">
                        Review now →
                    </a>
                </div>
                <div class="w-14 h-14 bg-orange-100 rounded-full flex items-center justify-center">
                    <svg class="w-7 h-7 text-orange-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/>
                    </svg>
                </div>
            </div>
        </div>
    </div>

    <!-- Academic Performance Grid -->
    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
        <!-- Today's Attendance -->
        <div class="bg-gradient-to-br from-blue-50 to-indigo-50 rounded-xl shadow-sm p-6 border border-blue-100">
            <div class="flex items-start justify-between mb-4">
                <div>
                    <p class="text-sm font-medium text-blue-600 mb-1">Today's Attendance</p>
                    <h3 class="text-3xl font-bold text-gray-900">{{ $todayAttendance['total_sessions'] > 0 ? number_format($todayAttendance['percentage'], 1) : '0' }}%</h3>
                </div>
                <div class="w-12 h-12 bg-blue-100 rounded-lg flex items-center justify-center">
                    <svg class="w-6 h-6 text-blue-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>
            @if($todayAttendance['total_sessions'] > 0)
            <div class="flex items-center justify-between text-sm">
                <span class="text-gray-600">Present: <span class="font-semibold text-gray-900">{{ number_format($todayAttendance['present']) }}</span></span>
                <span class="text-gray-600">Absent: <span class="font-semibold text-red-600">{{ number_format($todayAttendance['absent']) }}</span></span>
            </div>
            <div class="mt-3 pt-3 border-t border-blue-100">
                @if($todayAttendance['trend'] != 0)
                <span class="text-xs {{ $todayAttendance['trend'] > 0 ? 'text-green-600' : 'text-red-600' }} font-medium">
                    {{ $todayAttendance['trend'] > 0 ? '↑' : '↓' }} {{ abs(number_format($todayAttendance['trend'], 1)) }}% from yesterday
                </span>
                @else
                <span class="text-xs text-gray-600 font-medium">Same as yesterday</span>
                @endif
            </div>
            @else
            <div class="text-sm text-gray-500">
                <p>No attendance marked today</p>
            </div>
            @endif
        </div>

        <!-- Active Timetables -->
        <div class="bg-gradient-to-br from-purple-50 to-pink-50 rounded-xl shadow-sm p-6 border border-purple-100">
            <div class="flex items-start justify-between mb-4">
                <div>
                    <p class="text-sm font-medium text-purple-600 mb-1">Active Timetables</p>
                    <h3 class="text-3xl font-bold text-gray-900">{{ number_format($timetableStats['active_timetables']) }}</h3>
                </div>
                <div class="w-12 h-12 bg-purple-100 rounded-lg flex items-center justify-center">
                    <svg class="w-6 h-6 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z"/>
                    </svg>
                </div>
            </div>
            <div class="flex items-center justify-between text-sm">
                <span class="text-gray-600">Classes: <span class="font-semibold text-gray-900">{{ number_format($timetableStats['total_classes']) }}</span></span>
                <span class="text-gray-600">Venues: <span class="font-semibold text-gray-900">{{ number_format($timetableStats['total_venues']) }}</span></span>
            </div>
            <div class="mt-3 pt-3 border-t border-purple-100">
                @if($timetableStats['conflicts'] > 0)
                <span class="text-xs text-red-600 font-medium">{{ $timetableStats['conflicts'] }} {{ $timetableStats['conflicts'] == 1 ? 'conflict' : 'conflicts' }} detected</span>
                @else
                <span class="text-xs text-purple-600 font-medium">No conflicts detected</span>
                @endif
            </div>
        </div>

        <!-- Upcoming Exams -->
        <div class="bg-gradient-to-br from-orange-50 to-red-50 rounded-xl shadow-sm p-6 border border-orange-100">
            <div class="flex items-start justify-between mb-4">
                <div>
                    <p class="text-sm font-medium text-orange-600 mb-1">Upcoming Exams</p>
                    <h3 class="text-3xl font-bold text-gray-900">{{ number_format($examStats['upcoming_total']) }}</h3>
                </div>
                <div class="w-12 h-12 bg-orange-100 rounded-lg flex items-center justify-center">
                    <svg class="w-6 h-6 text-orange-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2"/>
                    </svg>
                </div>
            </div>
            <div class="flex items-center justify-between text-sm">
                <span class="text-gray-600">This Week: <span class="font-semibold text-gray-900">{{ number_format($examStats['this_week']) }}</span></span>
                <span class="text-gray-600">Next Week: <span class="font-semibold text-gray-900">{{ number_format($examStats['next_week']) }}</span></span>
            </div>
            <div class="mt-3 pt-3 border-t border-orange-100">
                @if($examStats['next_exam'])
                @php
                    $daysUntil = now()->diffInDays($examStats['next_exam']->exam_date);
                    $timeLabel = $daysUntil == 0 ? 'Today' : ($daysUntil == 1 ? 'Tomorrow' : 'In ' . $daysUntil . ' days');
                @endphp
                <span class="text-xs text-orange-600 font-medium">Next: {{ $examStats['next_exam']->code }} - {{ $timeLabel }} {{ date('g:i A', strtotime($examStats['next_exam']->start_time)) }}</span>
                @else
                <span class="text-xs text-gray-600 font-medium">No upcoming exams scheduled</span>
                @endif
            </div>
        </div>
    </div>

    <!-- Two Column Layout -->
    <div class="grid grid-cols-1 lg:grid-cols-3 gap-6">
        <!-- Left Column - 2/3 width -->
        <div class="lg:col-span-2 space-y-6">
            <!-- Students by Status Chart -->
            <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100">
                <h2 class="text-lg font-semibold text-gray-900 mb-4">Student Status Distribution</h2>
                <div class="space-y-3">
                    @foreach($studentsByStatus as $status => $count)
                        @php
                            $percentage = $stats['total_students'] > 0 ? ($count / $stats['total_students']) * 100 : 0;
                            $colorClass = match($status) {
                                'active' => 'bg-green-500',
                                'suspended' => 'bg-red-500',
                                'graduated' => 'bg-blue-500',
                                'withdrawn' => 'bg-gray-500',
                                'deferred' => 'bg-yellow-500',
                                default => 'bg-gray-400'
                            };
                        @endphp
                        <div>
                            <div class="flex items-center justify-between mb-1">
                                <span class="text-sm font-medium text-gray-700 capitalize">{{ $status }}</span>
                                <span class="text-sm text-gray-600">{{ number_format($count) }} ({{ number_format($percentage, 1) }}%)</span>
                            </div>
                            <div class="w-full bg-gray-200 rounded-full h-2">
                                <div class="{{ $colorClass }} rounded-full h-2" style="width: {{ $percentage }}%"></div>
                            </div>
                        </div>
                    @endforeach
                </div>
            </div>

            <!-- Recent Applications -->
            <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100">
                <div class="flex items-center justify-between mb-4">
                    <h2 class="text-lg font-semibold text-gray-900">Recent Applications</h2>
                    <a href="{{ route('applications.index') }}" class="text-sm text-blue-600 hover:text-blue-700 font-medium">
                        View all →
                    </a>
                </div>
                <div class="overflow-x-auto">
                    <table class="w-full">
                        <thead class="border-b border-gray-200">
                            <tr>
                                <th class="text-left py-3 px-4 text-sm font-semibold text-gray-600">Applicant</th>
                                <th class="text-left py-3 px-4 text-sm font-semibold text-gray-600">Program</th>
                                <th class="text-left py-3 px-4 text-sm font-semibold text-gray-600">Status</th>
                                <th class="text-left py-3 px-4 text-sm font-semibold text-gray-600">Date</th>
                            </tr>
                        </thead>
                        <tbody class="divide-y divide-gray-100">
                            @forelse($recentApplications as $application)
                                <tr class="hover:bg-gray-50">
                                    <td class="py-3 px-4">
                                        <div class="font-medium text-gray-900">{{ $application->first_name }} {{ $application->last_name }}</div>
                                        <div class="text-sm text-gray-500">{{ $application->email }}</div>
                                    </td>
                                    <td class="py-3 px-4 text-sm text-gray-900">{{ $application->program->name }}</td>
                                    <td class="py-3 px-4">
                                        <span class="px-2 py-1 text-xs font-medium rounded-full 
                                            {{ $application->status === 'pending' ? 'bg-yellow-100 text-yellow-800' : '' }}
                                            {{ $application->status === 'under_review' ? 'bg-blue-100 text-blue-800' : '' }}
                                            {{ $application->status === 'accepted' ? 'bg-green-100 text-green-800' : '' }}
                                            {{ $application->status === 'rejected' ? 'bg-red-100 text-red-800' : '' }}">
                                            {{ ucfirst(str_replace('_', ' ', $application->status)) }}
                                        </span>
                                    </td>
                                    <td class="py-3 px-4 text-sm text-gray-600">{{ $application->created_at->format('M d, Y') }}</td>
                                </tr>
                            @empty
                                <tr>
                                    <td colspan="4" class="py-8 text-center text-gray-500">No recent applications</td>
                                </tr>
                            @endforelse
                        </tbody>
                    </table>
                </div>
            </div>
        </div>

        <!-- Right Column - 1/3 width -->
        <div class="space-y-6">
            <!-- System Health -->
            <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100">
                <h2 class="text-lg font-semibold text-gray-900 mb-4">System Health</h2>
                <div class="space-y-4">
                    <div class="flex items-center justify-between">
                        <div class="flex items-center">
                            <div class="w-2 h-2 bg-green-500 rounded-full mr-3"></div>
                            <span class="text-sm text-gray-600">Users Online</span>
                        </div>
                        <span class="text-sm font-semibold text-gray-900">{{ $systemMetrics['users_online'] }}</span>
                    </div>
                    <div class="flex items-center justify-between">
                        <div class="flex items-center">
                            <div class="w-2 h-2 bg-blue-500 rounded-full mr-3"></div>
                            <span class="text-sm text-gray-600">Active Users</span>
                        </div>
                        <span class="text-sm font-semibold text-gray-900">{{ $systemMetrics['total_users'] }}</span>
                    </div>
                    <div class="flex items-center justify-between">
                        <div class="flex items-center">
                            <div class="w-2 h-2 bg-yellow-500 rounded-full mr-3"></div>
                            <span class="text-sm text-gray-600">Docs Pending</span>
                        </div>
                        <span class="text-sm font-semibold text-gray-900">{{ $systemMetrics['documents_pending_verification'] }}</span>
                    </div>
                </div>
            </div>

            <!-- Recent Activity -->
            <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100">
                <h2 class="text-lg font-semibold text-gray-900 mb-4">Recent Activity</h2>
                <div class="space-y-4">
                    @forelse($recentActivity->take(5) as $activity)
                        <div class="flex items-start space-x-3">
                            <div class="w-8 h-8 bg-gray-100 rounded-full flex items-center justify-center flex-shrink-0">
                                <span class="text-xs font-semibold text-gray-600">
                                    {{ $activity->user ? strtoupper(substr($activity->user->name, 0, 1)) : 'S' }}
                                </span>
                            </div>
                            <div class="flex-1 min-w-0">
                                <p class="text-sm text-gray-900">{{ $activity->description }}</p>
                                <p class="text-xs text-gray-500 mt-1">{{ $activity->created_at->diffForHumans() }}</p>
                            </div>
                        </div>
                    @empty
                        <p class="text-sm text-gray-500 text-center py-4">No recent activity</p>
                    @endforelse
                </div>
                <a href="{{ route('audit-logs.index') }}" class="block text-center text-sm text-blue-600 hover:text-blue-700 font-medium mt-4">
                    View all activity →
                </a>
            </div>

            <!-- Quick Actions -->
            <div class="bg-gradient-to-br from-blue-600 to-indigo-700 rounded-xl shadow-sm p-6 text-white">
                <h2 class="text-lg font-semibold mb-4">Quick Actions</h2>
                <div class="space-y-2">
                    <a href="{{ route('students.create') }}" class="block w-full bg-white bg-opacity-20 hover:bg-opacity-30 text-blue-500 rounded-lg px-4 py-2 text-sm font-medium transition">
                        + Add New Student
                    </a>
                    <a href="{{ route('staff.create') }}" class="block w-full bg-white bg-opacity-20 hover:bg-opacity-30 text-blue-500 rounded-lg px-4 py-2 text-sm font-medium transition">
                        + Add New Staff
                    </a>
                    <a href="{{ route('attendance.mark') }}" class="block w-full bg-white bg-opacity-20 hover:bg-opacity-30 text-blue-500 rounded-lg px-4 py-2 text-sm font-medium transition">
                        ✓ Mark Attendance
                    </a>
                    <a href="{{ route('timetable.index') }}" class="block w-full bg-white bg-opacity-20 hover:bg-opacity-30 text-blue-500 rounded-lg px-4 py-2 text-sm font-medium transition">
                        📅 View Timetable
                    </a>
                    <a href="{{ route('applications.index') }}" class="block w-full bg-white bg-opacity-20 hover:bg-opacity-30 text-blue-500 rounded-lg px-4 py-2 text-sm font-medium transition">
                        📋 Review Applications
                    </a>
                </div>
            </div>
        </div>
    </div>
</div>
@endsection