@extends('layouts.app')

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

@section('page-title', 'Teacher Dashboard')

@section('content')
<div class="container-fluid">
    <!-- Welcome Message -->
    <div class="row mb-4">
        <div class="col-12">
            <div class="card bg-gradient-primary text-black">
                <div class="card-body">
                    <div class="row align-items-center">
                        <div class="col-md-8">
                            <h3 class="card-title mb-1">Welcome, {{ Auth::user()->username }}! 👨‍🏫</h3>
                            <p class="mb-0">Here's your teaching overview for today.</p>
                        </div>
                        <div class="col-md-4 text-end">
                            <i class="fas fa-chalkboard-teacher fa-4x opacity-50"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- Quick Stats -->
    <div class="row mb-4">
        <div class="col-xl-3 col-md-6 mb-4">
            <div class="card border-left-primary shadow h-100 py-2">
                <div class="card-body">
                    <div class="row no-gutters align-items-center">
                        <div class="col mr-2">
                            <div class="text-xs font-weight-bold text-primary text-uppercase mb-1">
                                My Classes
                            </div>
                            <div class="h5 mb-0 font-weight-bold text-gray-800">{{ $stats['assignedClassesCount'] ?? 0 }}</div>
                        </div>
                        <div class="col-auto">
                            <i class="fas fa-chalkboard fa-2x text-gray-300"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <div class="col-xl-3 col-md-6 mb-4">
            <div class="card border-left-success shadow h-100 py-2">
                <div class="card-body">
                    <div class="row no-gutters align-items-center">
                        <div class="col mr-2">
                            <div class="text-xs font-weight-bold text-success text-uppercase mb-1">
                                Total Students
                            </div>
                            <div class="h5 mb-0 font-weight-bold text-gray-800">{{ $stats['totalStudentsCount'] ?? 0 }}</div>
                        </div>
                        <div class="col-auto">
                            <i class="fas fa-users fa-2x text-gray-300"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <div class="col-xl-3 col-md-6 mb-4">
            <div class="card border-left-info shadow h-100 py-2">
                <div class="card-body">
                    <div class="row no-gutters align-items-center">
                        <div class="col mr-2">
                            <div class="text-xs font-weight-bold text-info text-uppercase mb-1">
                                Pending Submissions
                            </div>
                            <div class="h5 mb-0 font-weight-bold text-gray-800">{{ $stats['pendingSubmissionsCount'] ?? 0 }}</div>
                        </div>
                        <div class="col-auto">
                            <i class="fas fa-tasks fa-2x text-gray-300"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <div class="col-xl-3 col-md-6 mb-4">
            <div class="card border-left-warning shadow h-100 py-2">
                <div class="card-body">
                    <div class="row no-gutters align-items-center">
                        <div class="col mr-2">
                            <div class="text-xs font-weight-bold text-warning text-uppercase mb-1">
                                Today's Sessions
                            </div>
                            <div class="h5 mb-0 font-weight-bold text-gray-800">{{ $stats['todaySessionsCount'] ?? 0 }}</div>
                        </div>
                        <div class="col-auto">
                            <i class="fas fa-clipboard-list fa-2x text-gray-300"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <div class="row">
        <!-- Today's Schedule -->
        <div class="col-lg-6 mb-4">
            <div class="card shadow">
                <div class="card-header py-3 d-flex justify-content-between align-items-center">
                    <h6 class="m-0 font-weight-bold text-primary">
                        <i class="fas fa-calendar-day me-2"></i>Today's Schedule
                    </h6>
                    <span class="badge bg-primary">{{ $todaysSchedule->count() ?? 0 }}</span>
                </div>
                <div class="card-body">
                    @if($todaysSchedule && $todaysSchedule->count() > 0)
                        <div class="list-group list-group-flush">
                            @foreach($todaysSchedule as $schedule)
                                <div class="list-group-item d-flex justify-content-between align-items-center px-0">
                                    <div class="d-flex align-items-center">
                                        <div class="bg-primary rounded-circle p-2 me-3">
                                            <i class="fas fa-book text-white"></i>
                                        </div>
                                        <div>
                                            <h6 class="mb-1 text-gray-900">{{ $schedule->subject->name ?? $schedule->subject->title ?? 'N/A' }}</h6>
                                            <small class="text-muted">
                                                <i class="fas fa-users me-1"></i>
                                                {{ $schedule->batch->name ?? 'N/A' }}
                                            </small>
                                            <br>
                                            <small class="text-muted">
                                                <i class="fas fa-clock me-1"></i>
                                                {{ $schedule->start_time ? \Carbon\Carbon::parse($schedule->start_time)->format('h:i A') : 'Time not set' }} -
                                                {{ $schedule->end_time ? \Carbon\Carbon::parse($schedule->end_time)->format('h:i A') : 'Time not set' }}
                                            </small>
                                        </div>
                                    </div>
                                    <div class="text-end">
                                        <span class="badge bg-{{ $schedule->status === 'completed' ? 'success' : ($schedule->status === 'ongoing' ? 'warning' : 'secondary') }} mb-2">
                                            {{ ucfirst($schedule->status) }}
                                        </span>
                                        <br>
                                        @if($schedule->status !== 'completed')
                                            <a href="{{ route('attendance.take', ['class' => $schedule->id]) }}"
                                               class="btn btn-sm btn-outline-primary mt-1">
                                                <i class="fas fa-clipboard-check me-1"></i>Take Attendance
                                            </a>
                                        @endif
                                    </div>
                                </div>
                            @endforeach
                        </div>
                    @else
                        <div class="text-center py-4">
                            <i class="fas fa-calendar-times fa-3x text-muted mb-3"></i>
                            <p class="text-muted mb-2">No classes scheduled for today</p>
                            <small class="text-muted">Enjoy your day off or prepare for upcoming classes</small>
                        </div>
                    @endif
                </div>
            </div>
        </div>

        <!-- Recent Submissions -->
        <div class="col-lg-6 mb-4">
            <div class="card shadow">
                <div class="card-header py-3 d-flex justify-content-between align-items-center">
                    <h6 class="m-0 font-weight-bold text-success">
                        <i class="fas fa-inbox me-2"></i>Recent Submissions
                    </h6>
                    <span class="badge bg-success">{{ $recentSubmissions->count() ?? 0 }}</span>
                </div>
                <div class="card-body">
                    @if($recentSubmissions && $recentSubmissions->count() > 0)
                        <div class="list-group list-group-flush">
                            @foreach($recentSubmissions as $submission)
                                <div class="list-group-item px-0">
                                    <div class="d-flex w-100 justify-content-between align-items-start mb-2">
                                        <h6 class="mb-1 text-gray-900">{{ $submission->assignment->title }}</h6>
                                        <small class="text-muted text-end">
                                            {{ $submission->submitted_at ? $submission->submitted_at->diffForHumans() : 'Not submitted' }}<br>
                                            <span class="badge {{ $submission->score ? 'bg-success' : 'bg-warning' }}">
                                                {{ $submission->score ? 'Graded' : 'Pending' }}
                                            </span>
                                        </small>
                                    </div>
                                    <p class="mb-2 text-muted small">
                                        <i class="fas fa-user-graduate me-1"></i>
                                        {{ $submission->student->user->name ?? $submission->student->user->username ?? 'N/A' }}
                                    </p>
                                    <p class="mb-2 text-muted small">
                                        <i class="fas fa-users me-1"></i>
                                        {{ $submission->assignment->batch->name ?? 'N/A' }}
                                    </p>
                                    <div class="d-flex justify-content-between align-items-center">
                                        <small class="text-muted">
                                            <i class="fas fa-book me-1"></i>
                                            {{ $submission->assignment->subject->name ?? $submission->assignment->subject->title ?? 'N/A' }}
                                        </small>
                                        <div>
                                            @if(!$submission->score)
                                                <a href="{{ route('assignments.show', $submission->assignment->id) }}"
                                                   class="btn btn-sm btn-success">
                                                    <i class="fas fa-check me-1"></i>Grade
                                                </a>
                                            @else
                                                <span class="text-muted small">
                                                    Score: {{ $submission->score }}/{{ $submission->assignment->max_score }}
                                                </span>
                                            @endif
                                        </div>
                                    </div>
                                </div>
                            @endforeach
                        </div>
                    @else
                        <div class="text-center py-4">
                            <i class="fas fa-inbox fa-3x text-muted mb-3"></i>
                            <p class="text-muted mb-2">No recent submissions</p>
                            <small class="text-muted">Student submissions will appear here</small>
                        </div>
                    @endif
                </div>
            </div>
        </div>
    </div>

    <!-- Second Row: Upcoming Assignments & Class Statistics -->
    <div class="row">
        <!-- Upcoming Assignment Deadlines -->
        <div class="col-lg-6 mb-4">
            <div class="card shadow">
                <div class="card-header py-3 d-flex justify-content-between align-items-center">
                    <h6 class="m-0 font-weight-bold text-warning">
                        <i class="fas fa-clock me-2"></i>Upcoming Assignment Deadlines
                    </h6>
                    <span class="badge bg-warning">{{ $upcomingAssignments->count() ?? 0 }}</span>
                </div>
                <div class="card-body">
                    @if($upcomingAssignments && $upcomingAssignments->count() > 0)
                        <div class="list-group list-group-flush">
                            @foreach($upcomingAssignments as $assignment)
                                <div class="list-group-item px-0">
                                    <div class="d-flex justify-content-between align-items-start mb-2">
                                        <h6 class="mb-1 text-gray-900">{{ $assignment->title }}</h6>
                                        <small class="text-muted text-end">
                                            Due: {{ $assignment->due_date ? $assignment->due_date->format('M d, Y') : 'No due date' }}<br>
                                            <span class="badge bg-{{ $assignment->due_date && $assignment->due_date->isToday() ? 'danger' : 'warning' }}">
                                                {{ $assignment->due_date && $assignment->due_date->isToday() ? 'Today' : ($assignment->due_date ? $assignment->due_date->diffForHumans() : 'No due date') }}
                                            </span>
                                        </small>
                                    </div>
                                    <p class="mb-2 text-muted small">
                                        <i class="fas fa-users me-1"></i>
                                        {{ $assignment->batch->name ?? 'N/A' }}
                                    </p>
                                    <p class="mb-2 text-muted small">
                                        {{ Str::limit($assignment->instructions, 100) }}
                                    </p>
                                    <div class="d-flex justify-content-between align-items-center">
                                        <small class="text-muted">
                                            Submissions:
                                            <span class="fw-bold">{{ $assignment->submissions_count ?? 0 }}/{{ $assignment->total_students ?? 0 }}</span>
                                        </small>
                                        <div>
                                            <a href="{{ route('assignments.show', $assignment->id) }}"
                                               class="btn btn-sm btn-outline-primary">
                                                <i class="fas fa-eye me-1"></i>View
                                            </a>
                                        </div>
                                    </div>
                                </div>
                            @endforeach
                        </div>
                    @else
                        <div class="text-center py-4">
                            <i class="fas fa-clock fa-3x text-muted mb-3"></i>
                            <p class="text-muted mb-2">No upcoming assignment deadlines</p>
                            <small class="text-muted">All assignments are properly scheduled</small>
                        </div>
                    @endif
                </div>
            </div>
        </div>

        <!-- Class Statistics -->
        <div class="col-lg-6 mb-4">
            <div class="card shadow">
                <div class="card-header py-3">
                    <h6 class="m-0 font-weight-bold text-info">
                        <i class="fas fa-chart-pie me-2"></i>Class Statistics
                    </h6>
                </div>
                <div class="card-body">
                    @if(isset($classStatistics) && count($classStatistics) > 0)
                        <div class="table-responsive">
                            <table class="table table-bordered table-sm">
                                <thead class="bg-light">
                                    <tr>
                                        <th>Class</th>
                                        <th class="text-center">Students</th>
                                        <th class="text-center">Attendance</th>
                                        <th class="text-center">Assignments</th>
                                    </tr>
                                </thead>
                                <tbody>
                                    @foreach($classStatistics as $class)
                                        <tr>
                                            <td class="text-sm">
                                                <strong>{{ $class['subject_name'] }}</strong><br>
                                                <small class="text-muted">{{ $class['batch_name'] }}</small>
                                            </td>
                                            <td class="text-center">
                                                <span class="badge bg-primary">{{ $class['total_students'] }}</span>
                                            </td>
                                            <td class="text-center">
                                                <span class="badge bg-{{ $class['attendance_rate'] >= 80 ? 'success' : ($class['attendance_rate'] >= 60 ? 'warning' : 'danger') }}">
                                                    {{ $class['attendance_rate'] }}%
                                                </span>
                                            </td>
                                            <td class="text-center">
                                                <span class="badge bg-{{ $class['assignments_count'] > 0 ? 'info' : 'secondary' }}">
                                                    {{ $class['assignments_count'] }}
                                                </span>
                                            </td>
                                        </tr>
                                    @endforeach
                                </tbody>
                            </table>
                        </div>
                    @else
                        <div class="text-center py-4">
                            <i class="fas fa-chart-pie fa-3x text-muted mb-3"></i>
                            <p class="text-muted">No class statistics available</p>
                        </div>
                    @endif
                    <div class="text-center mt-3">
                        <a href="{{ route('attendance.report') }}"
                           class="btn btn-outline-info btn-sm">
                            <i class="fas fa-chart-bar me-1"></i>View Detailed Reports
                        </a>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- Third Row: Quick Actions & Recent Materials -->
    <div class="row">
        <!-- Quick Actions -->
        <div class="col-lg-8 mb-4">
            <div class="card shadow">
                <div class="card-header py-3">
                    <h6 class="m-0 font-weight-bold text-secondary">Quick Actions</h6>
                </div>
                <div class="card-body">
                    <div class="row text-center">
                        <div class="col-xl-3 col-md-6 mb-3">
                            <a href="{{ route('teachers.classes', ['teacher' => Auth::user()->teacher->id ?? '']) }}"
                               class="btn btn-outline-primary btn-lg w-100 h-100 py-3 d-flex flex-column align-items-center justify-content-center">
                                <i class="fas fa-chalkboard fa-2x mb-2"></i>
                                <span>My Classes</span>
                            </a>
                        </div>
                        <div class="col-xl-3 col-md-6 mb-3">
                            <a href="{{ route('assignments.index') }}"
                               class="btn btn-outline-success btn-lg w-100 h-100 py-3 d-flex flex-column align-items-center justify-content-center">
                                <i class="fas fa-tasks fa-2x mb-2"></i>
                                <span>Assignments</span>
                            </a>
                        </div>
                        <div class="col-xl-3 col-md-6 mb-3">
                            <a href="{{ route('materials.index') }}"
                               class="btn btn-outline-info btn-lg w-100 h-100 py-3 d-flex flex-column align-items-center justify-content-center">
                                <i class="fas fa-file-alt fa-2x mb-2"></i>
                                <span>Materials</span>
                            </a>
                        </div>
                        <div class="col-xl-3 col-md-6 mb-3">
                            <a href="{{ route('attendance.index') }}"
                               class="btn btn-outline-warning btn-lg w-100 h-100 py-3 d-flex flex-column align-items-center justify-content-center">
                                <i class="fas fa-clipboard-check fa-2x mb-2"></i>
                                <span>Attendance</span>
                            </a>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Recent Materials Uploaded -->
        <div class="col-lg-4 mb-4">
            <div class="card shadow">
                <div class="card-header py-3 d-flex justify-content-between align-items-center">
                    <h6 class="m-0 font-weight-bold text-dark">
                        <i class="fas fa-upload me-2"></i>My Recent Materials
                    </h6>
                    <span class="badge bg-dark">{{ $recentMaterials->count() ?? 0 }}</span>
                </div>
                <div class="card-body">
                    @if($recentMaterials && $recentMaterials->count() > 0)
                        <div class="list-group list-group-flush">
                            @foreach($recentMaterials as $material)
                                <div class="list-group-item px-0 py-2">
                                    <div class="d-flex justify-content-between align-items-start">
                                        <h6 class="mb-1 text-gray-900 small">
                                            @php
                                                // Determine file type icon and color
                                                $fileExtension = pathinfo($material->file_path, PATHINFO_EXTENSION);
                                                $fileType = strtolower($fileExtension);

                                                if (in_array($fileType, ['pdf'])) {
                                                    $icon = 'file-pdf';
                                                    $color = 'danger';
                                                } elseif (in_array($fileType, ['doc', 'docx'])) {
                                                    $icon = 'file-word';
                                                    $color = 'primary';
                                                } elseif (in_array($fileType, ['xls', 'xlsx'])) {
                                                    $icon = 'file-excel';
                                                    $color = 'success';
                                                } elseif (in_array($fileType, ['ppt', 'pptx'])) {
                                                    $icon = 'file-powerpoint';
                                                    $color = 'warning';
                                                } elseif (in_array($fileType, ['jpg', 'jpeg', 'png', 'gif'])) {
                                                    $icon = 'file-image';
                                                    $color = 'info';
                                                } else {
                                                    $icon = 'file-alt';
                                                    $color = 'secondary';
                                                }
                                            @endphp
                                            <i class="fas fa-{{ $icon }} me-2 text-{{ $color }}"></i>
                                            {{ Str::limit($material->title, 25) }}
                                        </h6>
                                        <small class="text-muted">
                                            {{ $material->created_at->diffForHumans() }}
                                        </small>
                                    </div>
                                    <p class="mb-1 text-muted small">
                                        {{ $material->class->batch->name ?? 'N/A' }}
                                    </p>
                                    <div class="d-flex justify-content-between align-items-center">
                                        <span class="badge bg-{{ $material->published ? 'success' : 'warning' }} small">
                                            {{ $material->published ? 'Published' : 'Draft' }}
                                        </span>
                                        <div>
                                            <a href="{{ route('materials.download', $material->id) }}"
                                               class="btn btn-sm btn-outline-primary" title="Download">
                                                <i class="fas fa-download"></i>
                                            </a>
                                        </div>
                                    </div>
                                </div>
                            @endforeach
                        </div>
                    @else
                        <div class="text-center py-3">
                            <i class="fas fa-upload fa-2x text-muted mb-2"></i>
                            <p class="text-muted small mb-0">No materials uploaded yet</p>
                        </div>
                    @endif
                    <div class="text-center mt-3">
                        <a href="{{ route('materials.create') }}"
                           class="btn btn-sm btn-primary">
                            <i class="fas fa-plus me-1"></i>Upload New Material
                        </a>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
@endsection

@section('scripts')
<script>
$(document).ready(function() {
    // Auto-dismiss alerts after 5 seconds
    setTimeout(function() {
        $('.alert').fadeOut('slow');
    }, 5000);

    // Add smooth scrolling for better user experience
    $('a[href^="#"]').on('click', function(event) {
        var target = $(this.getAttribute('href'));
        if (target.length) {
            event.preventDefault();
            $('html, body').stop().animate({
                scrollTop: target.offset().top - 70
            }, 1000);
        }
    });
});
</script>
@endsection