@extends('layouts.app')

@section('title', 'إدارة الكورس - منصة ابدأ')

@section('content')
<div class="min-h-screen py-8 px-4 sm:px-6 lg:px-8 bg-ebda-light">
    <div class="max-w-7xl mx-auto">
        <!-- Hero Section -->
        <div class="bg-gradient-to-br from-[#1e3a8a] to-[#1e40af] rounded-[1.5rem] p-5 mb-6 text-white relative overflow-hidden">
            <div class="relative flex flex-col md:flex-row md:items-center md:justify-between gap-4">
                
                <div class="flex items-center gap-5">
                    <!-- Back Button -->
                    <div class="bg-white/90 rounded-xl shadow-md hover:bg-white transition-colors flex items-center justify-center shrink-0">
                        <x-back-button href="{{ route('instructor.dashboard') }}" label="العودة للوحة التحكم" />
                    </div>

                    <!-- Title & Category -->
                    <div class="flex-1">
                        @if($course->category)
                            <span class="inline-block px-3 py-1 bg-white/20 backdrop-blur-sm text-white text-xs font-bold rounded-full mb-2">
                                {{ $course->category->name }}
                            </span>
                        @endif

                        <h1 class="text-lg md:text-xl font-black mb-1 font-tajawal">
                            {{ $course->title }}
                        </h1>
                        <p class="text-white/80 text-xs font-medium">إدارة الكورس والطلاب المسجلين</p>
                    </div>
                </div>

                <!-- Stats Badge -->
                <div class="flex-shrink-0">
                    <div class="bg-white/20 backdrop-blur-sm rounded-xl px-4 py-2">
                        <p class="text-xs text-white/80 mb-1 font-medium">الطلاب المسجلون</p>
                        <p class="text-base font-black">{{ $course->trainees->count() }} طالب</p>
                    </div>
                </div>
            </div>
        </div>

        <!-- معلومات الكورس -->
        <div class="bg-white rounded-[2rem] p-8 shadow-sm border border-gray-100 mb-8">
            <div class="grid grid-cols-1 md:grid-cols-3 gap-6">
                <!-- الموقع -->
                @if($course->location)
                    <div class="flex items-center">
                        <div class="w-12 h-12 bg-blue-50 rounded-2xl flex items-center justify-center ml-4">
                            <svg class="w-6 h-6 text-[#1e3a8a]" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17.657 16.657L13.414 20.9a1.998 1.998 0 01-2.827 0l-4.244-4.243a8 8 0 1111.314 0z"/>
                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 11a3 3 0 11-6 0 3 3 0 016 0z"/>
                            </svg>
                        </div>
                        <div>
                            <p class="text-gray-500 text-sm">الموقع</p>
                            <p class="font-bold text-gray-800">{{ $course->location }}</p>
                        </div>
                    </div>
                @endif

                <!-- عدد الطلاب -->
                <div class="flex items-center">
                    <div class="w-12 h-12 bg-blue-50 rounded-2xl flex items-center justify-center ml-4">
                        <svg class="w-6 h-6 text-[#1e3a8a]" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197M13 7a4 4 0 11-8 0 4 4 0 018 0z"/>
                        </svg>
                    </div>
                    <div>
                        <p class="text-gray-500 text-sm">عدد الطلاب</p>
                        <p class="font-bold text-gray-800">{{ $course->trainees->count() }} طالب</p>
                    </div>
                </div>

                <!-- تاريخ البداية -->
                @if($course->start_date)
                    <div class="flex items-center">
                        <div class="w-12 h-12 bg-blue-50 rounded-2xl flex items-center justify-center ml-4">
                            <svg class="w-6 h-6 text-[#1e3a8a]" 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>
                            <p class="text-gray-500 text-sm">تاريخ البداية</p>
                            <p class="font-bold text-gray-800">{{ $course->start_date->format('Y-m-d') }}</p>
                        </div>
                    </div>
                @endif
            </div>
        </div>

        <!-- زر تقييم المهارات -->
        <div class="mb-8">
            <a href="{{ route('instructor.courses.show', $course->id) }}#trainees-section"
               class="inline-flex items-center justify-center w-full md:w-auto px-8 py-4 bg-gradient-to-r from-[#1e3a8a] to-blue-600 text-white text-sm font-bold rounded-2xl hover:from-blue-800 hover:to-blue-700 transition-all shadow-md hover:shadow-lg">
                <svg class="w-5 h-5 ml-2" 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 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4"/>
                </svg>
                تقييم المهارات العملية
            </a>
        </div>

        <!-- Trainees Section -->
        <div id="trainees-section" class="bg-white rounded-2xl border border-gray-100 shadow-sm p-6">
            <div class="flex items-center justify-between mb-4">
                <h2 class="text-lg font-bold text-gray-800 font-tajawal">الطلاب المسجلون</h2>
                <span class="text-xs text-gray-400">تتبع تقدم الطلاب</span>
            </div>

            @if($course->trainees->count() > 0)
                <div class="overflow-x-auto">
                    <table class="w-full">
                        <thead>
                            <tr class="border-b border-gray-100">
                                <th class="text-right py-4 px-4 font-bold text-gray-500 text-sm">الاسم</th>
                                <th class="text-right py-4 px-4 font-bold text-gray-500 text-sm">البريد الإلكتروني</th>
                                <th class="text-right py-4 px-4 font-bold text-gray-500 text-sm">تاريخ التسجيل</th>
                                <th class="text-right py-4 px-4 font-bold text-gray-500 text-sm">الحالة</th>
                            </tr>
                        </thead>
                        <tbody>
                            @foreach($course->trainees as $trainee)
                                <tr class="border-b border-gray-50 hover:bg-blue-50 transition-colors">
                                    <td class="py-4 px-4">
                                        <div class="flex items-center">
                                            <span class="font-bold text-gray-800 text-sm ml-3">{{ $trainee->name }}</span>
                                        </div>
                                    </td>
                                    <td class="py-4 px-4 text-gray-600 text-sm font-bold">{{ $trainee->email }}</td>
                                    <td class="py-4 px-4 text-gray-600 text-sm font-bold">{{ $trainee->pivot->enrolled_at ? \Carbon\Carbon::parse($trainee->pivot->enrolled_at)->format('Y-m-d') : '---' }}</td>
                                    <td class="py-4 px-4">
                                        <a href="{{ route('instructor.skills.show', ['courseId' => $course->id, 'traineeId' => $trainee->id]) }}"
                                           class="inline-flex items-center gap-2 px-4 py-2 bg-gradient-to-r from-[#1e3a8a] to-blue-600 text-white text-xs font-bold rounded-full hover:from-blue-800 hover:to-blue-700 transition-all">
                                            <svg class="w-4 h-4" 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 2m-6 9l2 2 4-4"/>
                                            </svg>
                                            عرض المهارات
                                        </a>
                                    </td>
                                </tr>
                            @endforeach
                        </tbody>
                    </table>
                </div>
            @else
                <div class="text-center py-8">
                    <svg class="w-16 h-16 text-gray-400 mx-auto mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197M13 7a4 4 0 11-8 0 4 4 0 018 0z"/>
                    </svg>
                    <p class="text-gray-500 text-sm font-medium">لا يوجد طلاب مسجلون حالياً</p>
                </div>
            @endif
        </div>

        <!-- قسم المهارات العملية -->
        <div class="bg-white rounded-[2rem] p-8 shadow-sm border border-gray-100">
            <div class="flex items-center justify-between mb-6">
                <h2 class="text-2xl font-bold text-gray-800 font-tajawal">المهارات العملية</h2>
                <button onclick="openAddSkillModal()" class="inline-flex items-center gap-2 px-4 py-2 bg-[#1e3a8a] text-white text-sm font-bold rounded-xl hover:bg-[#1e40af] transition-colors">
                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4"/>
                    </svg>
                    إضافة مهارة جديدة
                </button>
            </div>

            @if($course->practicalSkills->count() > 0)
                <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
                    @foreach($course->practicalSkills as $skill)
                        <div class="p-4 bg-gray-50 rounded-2xl border {{ $skill->is_active ? 'border-green-200 bg-green-50' : 'border-gray-200 bg-gray-50' }} hover:shadow-md transition-shadow">
                            <div class="flex items-start justify-between mb-2">
                                <div class="flex-1">
                                    <div class="flex items-center gap-2 mb-1">
                                        <h3 class="font-bold text-gray-800">{{ $skill->skill_name }}</h3>
                                        <span class="inline-flex items-center gap-1 px-2 py-0.5 text-xs font-bold rounded-full {{ $skill->is_active ? 'bg-green-100 text-green-700' : 'bg-yellow-100 text-yellow-700' }}">
                                            {{ $skill->is_active ? 'مفعلة' : 'غير مفعلة' }}
                                        </span>
                                    </div>
                                    <p class="text-gray-600 text-sm">{{ $skill->description }}</p>
                                </div>
                                <div class="flex gap-2">
                                    <button onclick="toggleSkill({{ $skill->id }})" class="p-2 rounded-lg {{ $skill->is_active ? 'bg-green-100 text-green-600 hover:bg-green-200' : 'bg-yellow-100 text-yellow-600 hover:bg-yellow-200' }} transition-colors" title="{{ $skill->is_active ? 'تعطيل المهارة' : 'تفعيل المهارة' }}">
                                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                            @if($skill->is_active)
                                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/>
                                            @else
                                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/>
                                            @endif
                                        </svg>
                                    </button>
                                    <button onclick="openEditSkillModal({{ $skill->id }}, '{{ $skill->skill_name }}', '{{ $skill->description ?? '' }}')" class="p-2 rounded-lg bg-blue-100 text-blue-600 hover:bg-blue-200 transition-colors" title="تعديل المهارة">
                                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"/>
                                        </svg>
                                    </button>
                                    <button onclick="deleteSkill({{ $skill->id }})" class="p-2 rounded-lg bg-red-100 text-red-600 hover:bg-red-200 transition-colors" title="حذف المهارة">
                                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"/>
                                        </svg>
                                    </button>
                                </div>
                            </div>
                        </div>
                    @endforeach
                </div>
            @else
                <div class="text-center py-12">
                    <svg class="w-16 h-16 text-gray-400 mx-auto mb-4" 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>
                    <p class="text-gray-500 text-sm font-medium mb-4">لا توجد مهارات عملية مضافة بعد</p>
                    <button onclick="openAddSkillModal()" class="inline-flex items-center gap-2 px-6 py-3 bg-[#1e3a8a] text-white text-sm font-bold rounded-xl hover:bg-[#1e40af] transition-colors">
                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4"/>
                        </svg>
                        إضافة مهارة جديدة
                    </button>
                </div>
            @endif
        </div>

        <!-- Modal for Adding/Editing Skill -->
        <div id="skillModal" class="fixed inset-0 bg-black/50 z-50 hidden flex items-center justify-center backdrop-blur-sm">
            <div class="bg-white rounded-2xl shadow-2xl p-6 max-w-md w-full mx-4 transform transition-all">
                <div class="flex items-center justify-between mb-5">
                    <h3 id="modalTitle" class="text-lg font-bold text-gray-800">إضافة مهارة جديدة</h3>
                    <button onclick="closeSkillModal()" class="text-gray-400 hover:text-gray-600 transition-colors">
                        <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"/>
                        </svg>
                    </button>
                </div>

                <form id="skillForm" action="#" method="POST">
                    @csrf
                    <input type="hidden" name="course_id" value="{{ $course->id }}">
                    <input type="hidden" name="skill_id" id="skill_id" value="">

                    <div class="space-y-4">
                        <div>
                            <label class="block text-sm font-bold text-gray-700 mb-2">اسم المهارة</label>
                            <input type="text" name="skill_name" id="skill_name" required
                                   class="w-full px-4 py-3 border border-gray-200 rounded-xl focus:ring-2 focus:ring-[#1e3a8a] focus:border-transparent transition-all"
                                   placeholder="أدخل اسم المهارة">
                        </div>

                        <div>
                            <label class="block text-sm font-bold text-gray-700 mb-2">الوصف</label>
                            <textarea name="description" id="description" rows="3"
                                      class="w-full px-4 py-3 border border-gray-200 rounded-xl focus:ring-2 focus:ring-[#1e3a8a] focus:border-transparent transition-all resize-none"
                                      placeholder="أدخل وصف المهارة"></textarea>
                        </div>
                    </div>

                    <div class="flex gap-3 mt-6">
                        <button type="button" onclick="closeSkillModal()" class="flex-1 px-4 py-3 border border-gray-200 text-gray-600 font-bold rounded-xl hover:bg-gray-50 transition-colors">
                            إلغاء
                        </button>
                        <button type="submit" class="flex-1 px-4 py-3 bg-[#1e3a8a] text-white font-bold rounded-xl hover:bg-[#1e40af] transition-colors">
                            حفظ
                        </button>
                    </div>
                </form>
            </div>
        </div>

        <script>
            function openAddSkillModal() {
                document.getElementById('modalTitle').textContent = 'إضافة مهارة جديدة';
                document.getElementById('skill_id').value = '';
                document.getElementById('skill_name').value = '';
                document.getElementById('description').value = '';
                document.getElementById('skillModal').classList.remove('hidden');
            }

            function openEditSkillModal(skillId, skillName, description) {
                document.getElementById('modalTitle').textContent = 'تعديل المهارة';
                document.getElementById('skill_id').value = skillId;
                document.getElementById('skill_name').value = skillName;
                document.getElementById('description').value = description;
                document.getElementById('skillModal').classList.remove('hidden');
            }

            function closeSkillModal() {
                document.getElementById('skillModal').classList.add('hidden');
            }

            // Handle form submission
            document.getElementById('skillForm').addEventListener('submit', function(e) {
                e.preventDefault();
                const skillId = document.getElementById('skill_id').value;
                const formData = new FormData(this);
                const courseId = {{ $course->id }};
                let url;

                if (skillId) {
                    url = `/instructor/courses/${courseId}/skills/${skillId}`;
                    formData.append('_method', 'PUT');
                } else {
                    url = `/instructor/courses/${courseId}/skills`;
                }

                fetch(url, {
                    method: 'POST',
                    headers: {
                        'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content')
                    },
                    body: formData
                })
                .then(response => response.json())
                .then(data => {
                    if (data.success) {
                        closeSkillModal();
                        EbdaAlert.success(data.message || 'تمّت العملية بنجاح.');
                        setTimeout(() => location.reload(), 1500);
                    } else {
                        EbdaAlert.error(data.message || 'عذراً، حدث خطأ أثناء حفظ المهارة.');
                    }
                })
                .catch(error => {
                    EbdaAlert.error('عذراً، حدث خطأ غير متوقع. يُرجى المحاولة مجدداً.');
                });
            });

            function deleteSkill(skillId) {
                Swal.fire({
                    title: 'حذف المهارة',
                    text: 'هل تريد حذف هذه المهارة؟ سيتم حذف جميع التقييمات المرتبطة بها.',
                    icon: 'warning',
                    confirmButtonText: 'نعم، احذف',
                    cancelButtonText: 'إلغاء',
                    showCancelButton: true,
                    customClass: { popup: 'ebda-swal-popup', confirmButton: 'ebda-swal-confirm', cancelButton: 'ebda-swal-cancel' },
                    buttonsStyling: false,
                    reverseButtons: true,
                    rtl: true,
                }).then((result) => {
                    if (result.isConfirmed) {
                        const courseId = {{ $course->id }};
                        const url = `/instructor/courses/${courseId}/skills/${skillId}`;
                        fetch(url, {
                            method: 'DELETE',
                            headers: { 'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content') }
                        })
                        .then(response => response.json())
                        .then(data => {
                            if (data.success) {
                                EbdaAlert.success(data.message || 'تمّ حذف المهارة بنجاح.');
                                setTimeout(() => location.reload(), 1500);
                            } else {
                                EbdaAlert.error(data.message || 'عذراً، تعذّر حذف المهارة.');
                            }
                        })
                        .catch(() => EbdaAlert.error('عذراً، حدث خطأ غير متوقع.'));
                    }
                });
            }

            function toggleSkill(skillId) {
                const courseId = {{ $course->id }};
                const url = `/instructor/courses/${courseId}/skills/${skillId}/toggle`;

                fetch(url, {
                    method: 'POST',
                    headers: {
                        'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content')
                    }
                })
                .then(response => response.json())
                .then(data => {
                    if (data.success) {
                        EbdaAlert.success(data.message || 'تمّ تحديث حالة المهارة بنجاح.');
                        setTimeout(() => location.reload(), 1500);
                    } else {
                        EbdaAlert.error(data.message || 'عذراً، حدث خطأ أثناء تفعيل/تعطيل المهارة.');
                    }
                })
                .catch(error => {
                    EbdaAlert.error('عذراً، حدث خطأ غير متوقع.');
                });
            }
        </script>
    </div>
</div>
@endsection