@extends('layouts.app')

@section('content')
<div class="flex-1 space-y-6">
    <!-- Header -->
    <div class="flex items-center gap-2 text-slate-500 text-sm mb-2">
        <a href="{{ route('dashboard') }}" class="hover:text-blue-600 cursor-pointer">Trang chủ</a>
        <i data-lucide="chevron-right" class="w-4 h-4"></i>
        <span>Quản lý Exam</span>
    </div>
    <h1 class="text-3xl font-bold text-slate-900 mb-6">Quản lý Exam</h1>

    <!-- Notifications -->
    <div class="message-class">
        @if(session('success'))
            <div class="fixed top-4 right-4 z-50 max-w-md bg-green-500 text-white px-4 py-3 rounded-lg shadow-lg flex items-center gap-3" id="success-flash">
                {{ session('success') }}
                <button type="button" onclick="document.getElementById('success-flash').remove()" class="text-white hover:text-slate-200">
                    <i data-lucide="x" class="w-5 h-5"></i>
                </button>
            </div>
        @endif
        @if(session('error'))
            <div class="fixed top-4 right-4 z-50 max-w-md bg-red-500 text-white px-4 py-3 rounded-lg shadow-lg flex items-center gap-3" id="error-flash">
                {{ session('error') }}
                <button type="button" onclick="document.getElementById('error-flash').remove()" class="text-white hover:text-slate-200">
                    <i data-lucide="x" class="w-5 h-5"></i>
                </button>
            </div>
        @endif
    </div>

    <!-- Toolbar -->
    <div class="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4">
        <p class="text-sm text-slate-600">Tổng số Exam: <span class="font-semibold text-slate-900">{{ $exams->total() }}</span></p>
        <a href="{{ route('exams.create') }}" class="inline-flex items-center gap-2 px-4 py-2 bg-blue-600 text-white rounded-lg text-sm font-medium hover:bg-blue-700 transition-colors shadow-sm">
            <i data-lucide="plus" class="w-4 h-4"></i>
            Tạo Exam
        </a>
    </div>

    <!-- Table -->
    <div class="bg-white rounded-xl shadow-sm border border-slate-200 overflow-hidden">
        <div class="overflow-x-auto">
            <table class="min-w-full divide-y divide-slate-200">
                <thead class="bg-slate-50">
                    <tr>
                        <th class="px-6 py-3 text-left text-xs font-semibold text-slate-600 uppercase tracking-wider whitespace-nowrap">STT</th>
                        <th class="px-6 py-3 text-left text-xs font-semibold text-slate-600 uppercase tracking-wider whitespace-nowrap">Tên Exam</th>
                        <th class="px-6 py-3 text-left text-xs font-semibold text-slate-600 uppercase tracking-wider whitespace-nowrap">Slug</th>
                        <th class="px-6 py-3 text-left text-xs font-semibold text-slate-600 uppercase tracking-wider whitespace-nowrap">EMS ID</th>
                        <th class="px-6 py-3 text-left text-xs font-semibold text-slate-600 uppercase tracking-wider whitespace-nowrap">Number Limit</th>
                        <th class="px-6 py-3 text-left text-xs font-semibold text-slate-600 uppercase tracking-wider whitespace-nowrap">Time Duration</th>
                        <th class="px-6 py-3 text-left text-xs font-semibold text-slate-600 uppercase tracking-wider whitespace-nowrap">Số Exam Final</th>
                        <th class="px-6 py-3 text-left text-xs font-semibold text-slate-600 uppercase tracking-wider whitespace-nowrap">Ngày tạo</th>
                        <th class="px-6 py-3 text-center text-xs font-semibold text-slate-600 uppercase tracking-wider whitespace-nowrap">Hành động</th>
                    </tr>
                </thead>
                <tbody class="bg-white divide-y divide-slate-200">
                    @forelse($exams as $index => $exam)
                        <tr id="exam-{{ $exam->id }}" class="hover:bg-slate-50 transition-colors">
                            <td class="px-6 py-4 whitespace-nowrap text-sm text-slate-700">{{ ($exams->currentPage() - 1) * $exams->perPage() + $index + 1 }}</td>
                            <td class="px-6 py-4 whitespace-nowrap text-sm font-medium text-slate-900">{{ $exam->name }}</td>
                            <td class="px-6 py-4 whitespace-nowrap text-sm text-slate-700">{{ $exam->slug }}</td>
                            <td class="px-6 py-4 whitespace-nowrap text-sm text-slate-700">{{ $exam->ems_id ?? '-' }}</td>
                            <td class="px-6 py-4 whitespace-nowrap text-sm text-slate-700">
                                @if($exam->number_limit > 0)
                                    {{ $exam->number_limit }}
                                @else
                                    <span class="text-slate-400">∞</span>
                                @endif
                            </td>
                            <td class="px-6 py-4 whitespace-nowrap text-sm text-slate-700">
                                @if($exam->time_duration > 0)
                                    @php $days = floor($exam->time_duration / 86400); @endphp
                                    {{ $days }}d
                                @else
                                    <span class="text-slate-400">∞</span>
                                @endif
                            </td>
                            <td class="px-6 py-4 whitespace-nowrap text-sm text-slate-700">{{ $exam->campaignExams->count() }}</td>
                            <td class="px-6 py-4 whitespace-nowrap text-sm text-slate-700">{{ $exam->created_at->copy()->addHours(7)->format('d/m/Y H:i') }}</td>
                            <td class="px-6 py-4 whitespace-nowrap text-center">
                                <a href="{{ route('exams.show', ['id' => $exam->id]) }}" title="Xem chi tiết Exam" class="inline-flex p-2 text-blue-600 hover:bg-blue-50 rounded-lg transition-colors">
                                    <i data-lucide="eye" class="w-4 h-4"></i>
                                </a>
                                <a href="{{ route('exams.edit', ['id' => $exam->id]) }}" title="Chỉnh sửa Exam" class="inline-flex p-2 text-green-600 hover:bg-green-50 rounded-lg transition-colors">
                                    <i data-lucide="pencil" class="w-4 h-4"></i>
                                </a>
                                <button type="button" class="item-delete btnDeleteExam inline-flex p-2 text-red-600 hover:bg-red-50 rounded-lg transition-colors" data-exam-id="{{ $exam->id }}" data-exam-name="{{ $exam->name }}" onclick="showModalDeleteExam(this)" title="Xóa Exam">
                                    <i data-lucide="trash-2" class="w-4 h-4"></i>
                                </button>
                            </td>
                        </tr>
                    @empty
                        <tr>
                            <td colspan="9" class="px-6 py-6 text-center text-sm text-slate-500">
                                Không có dữ liệu.
                            </td>
                        </tr>
                    @endforelse
                </tbody>
            </table>
        </div>
        <!-- Pagination -->
        @if($exams->hasPages())
            <div class="px-4 md:px-6 py-4 border-t border-slate-200 bg-slate-50">
                <div class="flex flex-col sm:flex-row items-center justify-between gap-4">
                    <div class="text-xs sm:text-sm text-slate-500">
                        Hiển thị <span class="font-medium text-slate-700">{{ $exams->firstItem() ?? 0 }} - {{ $exams->lastItem() ?? 0 }}</span> trong tổng số <span class="font-medium text-slate-700">{{ $exams->total() }}</span> bản ghi
                    </div>
                    <div class="flex items-center gap-1.5 sm:gap-2">
                        @if($exams->onFirstPage())
                            <span class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm text-slate-400 bg-slate-100 rounded-lg cursor-not-allowed flex-shrink-0">
                                <i data-lucide="chevron-left" class="w-4 h-4 inline-block"></i>
                            </span>
                        @else
                            <a href="{{ $exams->appends(request()->all())->previousPageUrl() }}" class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm text-slate-700 bg-white border border-slate-300 rounded-lg hover:bg-slate-50 transition-colors flex-shrink-0">
                                <i data-lucide="chevron-left" class="w-4 h-4 inline-block"></i>
                            </a>
                        @endif
                        @php
                            $exams->appends(request()->all());
                            $currentPage = $exams->currentPage();
                            $lastPage = $exams->lastPage();
                            $onEachSide = 1;
                            $start = max(2, $currentPage - $onEachSide);
                            $end = min($lastPage - 1, $currentPage + $onEachSide);
                        @endphp

                        {{-- Page 1 --}}
                        @if($currentPage == 1)
                            <span class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm font-medium text-white bg-blue-600 rounded-lg flex-shrink-0 min-w-[2rem] text-center">1</span>
                        @else
                            <a href="{{ $exams->url(1) }}" class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm text-slate-700 bg-white border border-slate-300 rounded-lg hover:bg-slate-50 transition-colors flex-shrink-0 min-w-[2rem] text-center">1</a>
                        @endif

                        {{-- Start Ellipsis --}}
                        @if($start > 2)
                            <span class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm text-slate-400 bg-slate-50 rounded-lg flex-shrink-0 min-w-[2rem] text-center">...</span>
                        @endif

                        {{-- Middle Pages --}}
                        @for($i = $start; $i <= $end; $i++)
                            @if($i == $currentPage)
                                <span class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm font-medium text-white bg-blue-600 rounded-lg flex-shrink-0 min-w-[2rem] text-center">{{ $i }}</span>
                            @else
                                <a href="{{ $exams->url($i) }}" class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm text-slate-700 bg-white border border-slate-300 rounded-lg hover:bg-slate-50 transition-colors flex-shrink-0 min-w-[2rem] text-center">{{ $i }}</a>
                            @endif
                        @endfor

                        {{-- End Ellipsis --}}
                        @if($end < $lastPage - 1)
                            <span class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm text-slate-400 bg-slate-50 rounded-lg flex-shrink-0 min-w-[2rem] text-center">...</span>
                        @endif

                        {{-- Last Page --}}
                        @if($lastPage > 1)
                            @if($currentPage == $lastPage)
                                <span class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm font-medium text-white bg-blue-600 rounded-lg flex-shrink-0 min-w-[2rem] text-center">{{ $lastPage }}</span>
                            @else
                                <a href="{{ $exams->url($lastPage) }}" class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm text-slate-700 bg-white border border-slate-300 rounded-lg hover:bg-slate-50 transition-colors flex-shrink-0 min-w-[2rem] text-center">{{ $lastPage }}</a>
                            @endif
                        @endif
                        @if($exams->hasMorePages())
                            <a href="{{ $exams->appends(request()->all())->nextPageUrl() }}" class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm text-slate-700 bg-white border border-slate-300 rounded-lg hover:bg-slate-50 transition-colors flex-shrink-0">
                                <i data-lucide="chevron-right" class="w-4 h-4 inline-block"></i>
                            </a>
                        @else
                            <span class="px-2.5 sm:px-3 py-1.5 text-xs sm:text-sm text-slate-400 bg-slate-100 rounded-lg cursor-not-allowed flex-shrink-0">
                                <i data-lucide="chevron-right" class="w-4 h-4 inline-block"></i>
                            </span>
                        @endif
                    </div>
                </div>
        @endif
    </div>
</div>

<!-- Delete Modal -->
<div id="deleteExamModal" class="hidden fixed inset-0 z-50 overflow-y-auto" aria-modal="true">
    <div class="fixed inset-0 bg-black bg-opacity-50 transition-opacity" id="delete-exam-modal-backdrop"></div>
    <div class="flex min-h-full items-center justify-center p-4">
        <div class="relative bg-white rounded-xl shadow-xl w-full max-w-md overflow-hidden">
            <div class="flex items-center justify-between px-6 py-4 border-b border-slate-200">
                <h3 class="text-lg font-semibold text-slate-900">Xóa Exam</h3>
                <button type="button" class="text-slate-400 hover:text-slate-600 transition-colors" onclick="closeModalDeleteExam()">
                    <i data-lucide="x" class="w-5 h-5"></i>
                </button>
            </div>
            <div class="px-6 py-6">
                <form action="" id="deleteExamForm" method="post">
                    @csrf
                    @method('DELETE')
                    <p class="text-sm text-slate-600">Bạn có chắc chắn xoá "<strong class="this_item_name text-slate-900">test</strong>" khỏi hệ thống?</p>
                </form>
            </div>
            <div class="flex items-center justify-end gap-3 px-6 py-4 border-t border-slate-200 bg-slate-50">
                <button type="button" class="px-4 py-2 text-sm font-medium text-slate-700 bg-white border border-slate-300 rounded-lg hover:bg-slate-50 transition-colors" onclick="closeModalDeleteExam()">Huỷ bỏ</button>
                <button type="button" class="px-4 py-2 text-sm font-medium text-white bg-red-600 rounded-lg hover:bg-red-700 transition-colors btn-action-delete-exam">
                    <i data-lucide="trash-2" class="w-4 h-4 inline-block mr-1"></i>
                    Xoá
                </button>
            </div>
        </div>
    </div>
</div>
@endsection

@section('scripts')
<script>
    function showModalDeleteExam(button) {
        const examId = $(button).attr('data-exam-id');
        const examName = $(button).attr('data-exam-name');
        $('.this_item_name').text(examName);
        const deleteUrl = '{{ route("exams.destroy", ["id" => ":id"]) }}'.replace(':id', examId);
        $('#deleteExamForm').attr('action', deleteUrl);
        $('#deleteExamModal').removeClass('hidden');
        if (typeof lucide !== 'undefined') lucide.createIcons();
    }
    function closeModalDeleteExam() {
        $('#deleteExamModal').addClass('hidden');
    }
    $('#delete-exam-modal-backdrop').on('click', function() { closeModalDeleteExam(); });
    $('.btn-action-delete-exam').on('click', function() {
        $(this).prop('disabled', true).addClass('opacity-50 cursor-not-allowed').html('<div class="flex items-center gap-2"><div class="animate-spin rounded-full h-4 w-4 border-2 border-white border-t-transparent"></div> Đang xoá...</div>');
        $('#deleteExamForm').submit();
    });
    if (typeof lucide !== 'undefined') lucide.createIcons();
</script>
@endsection