@extends('layouts.app')

@section('content')
    <div class="max-w-3xl mx-auto mt-10 p-8 bg-white/80 backdrop-blur-lg rounded-2xl shadow-lg">

        ```
        {{-- Breadcrumb --}}
        <nav class="text-gray-600 text-sm mb-4" aria-label="Breadcrumb">
            <ol class="flex">
                <li><a href="{{ route('dashboard') }}" class="text-indigo-600 hover:underline">Home</a></li>
                <span class="mx-2">/</span>
                <li class="text-gray-900 font-semibold">Certifications</li>
            </ol>
        </nav>

        {{-- Header --}}
        <div class="flex justify-between items-center mb-6">
            <h2 class="text-2xl font-semibold text-gray-800">Your Certificates</h2>
            <a href="{{ route('dashboard') }}"
                class="bg-gray-100 hover:bg-gray-200 text-gray-700 px-4 py-2 rounded-lg border">
                ← Go Back
            </a>
        </div>

        {{-- Success Message --}}
        @if (session('success'))
            <div class="bg-green-50 text-green-800 p-3 rounded mb-6 text-center font-medium">
                {{ session('success') }}
            </div>
        @endif

        <form action="{{ route('certifications.store') }}" method="POST" enctype="multipart/form-data">
            @csrf

            <div id="cert-container">
                @php
                    $savedCerts = $certifications ?? collect();
                    if ($savedCerts->isEmpty()) {
                        $savedCerts = [null];
                    }
                @endphp

                @foreach ($savedCerts as $index => $cert)
                    <div class="cert-item mb-8 p-6 border rounded-xl bg-white shadow-sm">

                        {{-- Certificate Name --}}
                        <div class="mb-3">
                            <label class="block text-gray-700 font-medium">Certificate Name</label>
                            <input type="text" name="certificate_name[]" class="w-full border p-3 rounded-lg"
                                value="{{ old('certificate_name.' . $index, $cert->certificate_name ?? '') }}" required>
                        </div>

                        {{-- Issued By --}}
                        <div class="mb-3">
                            <label class="block text-gray-700 font-medium">Issued By</label>
                            <input type="text" name="issued_by[]" class="w-full border p-3 rounded-lg"
                                value="{{ old('issued_by.' . $index, $cert->issued_by ?? '') }}" required>
                        </div>

                        {{-- Issue Date --}}
                        <div class="mb-3">
                            <label class="block text-gray-700 font-medium">Issue Date</label>
                            <input type="date" name="issue_date[]" class="w-full border p-3 rounded-lg"
                                value="{{ old('issue_date.' . $index, $cert->issue_date ?? '') }}">
                        </div>

                        {{-- Certificate Link (Optional) --}}
                        <div class="mb-3">
                            <label class="block text-gray-700 font-medium">Certificate Link (Optional)</label>
                            <input type="url" name="certificate_link[]" class="w-full border p-3 rounded-lg"
                                value="{{ old('certificate_link.' . $index, $cert->certificate_link ?? '') }}">
                        </div>

                        {{-- Upload Certificate --}}
                        <div class="mb-3">
                            <label class="block text-gray-700 font-medium">Upload Certificate (Optional)</label><br>
                            <input type="file" name="certificate_file[]" id="cert_file_{{ $index }}"
                                class="hidden" accept="image/*,application/pdf">
                            <label for="cert_file_{{ $index }}"
                                class="cursor-pointer bg-indigo-500 text-white px-5 py-2 rounded-lg">Choose File</label>
                            <span id="cert-file-name-{{ $index }}" class="ml-3 text-gray-600">
                                {{ isset($cert->certificate_file) ? basename($cert->certificate_file) : '' }}
                            </span>

                            @if (isset($cert->certificate_file))
                                <img id="cert-preview-{{ $index }}"
                                    src="{{ asset('storage/' . $cert->certificate_file) }}"
                                    class="mt-3 h-24 rounded-lg border">
                            @else
                                <img id="cert-preview-{{ $index }}" class="hidden mt-3 h-24 rounded-lg border">
                            @endif
                        </div>

                        {{-- Remove Button --}}
                        <div class="text-right">
                            <button type="button"
                                class="remove-cert bg-red-500 text-white px-4 py-2 rounded-lg hover:bg-red-600">Remove</button>
                        </div>

                    </div>
                @endforeach
            </div>

            {{-- Add More Button --}}
            <div class="text-center mb-4">
                <button type="button" id="add-cert"
                    class="bg-indigo-500 text-white px-6 py-2 rounded-lg hover:bg-indigo-600">
                    Add More Certificates
                </button>
            </div>

            {{-- Submit --}}
            <button type="submit" class="w-full bg-indigo-600 text-white py-3 rounded-lg hover:bg-indigo-700">
                Save Certificates
            </button>
        </form>
        ```

    </div>

    <script>
        let certCount = {{ is_countable($savedCerts) ? count($savedCerts) : 0 }};

        // Add More Certificates
        document.getElementById('add-cert').addEventListener('click', function() {
            const container = document.getElementById('cert-container');
            const newItem = document.querySelector('.cert-item').cloneNode(true);

            newItem.querySelectorAll("input").forEach(i => i.value = "");

            const fileInput = newItem.querySelector('input[type="file"]');
            const fileLabel = newItem.querySelector('label[for]');
            const fileName = newItem.querySelector('span[id^="cert-file-name"]');
            const preview = newItem.querySelector('img[id^="cert-preview"]');

            fileInput.id = `cert_file_${certCount}`;
            fileLabel.setAttribute("for", `cert_file_${certCount}`);
            fileName.id = `cert-file-name-${certCount}`;
            preview.id = `cert-preview-${certCount}`;
            fileName.textContent = "";
            preview.classList.add('hidden');
            preview.src = "";

            container.appendChild(newItem);
            attachPreview(fileInput, fileName, preview);

            certCount++;
        });

        // Remove Certificate
        document.addEventListener('click', function(e) {
            if (e.target.classList.contains('remove-cert')) {
                const items = document.querySelectorAll('.cert-item');
                if (items.length > 1) {
                    e.target.closest('.cert-item').remove();
                } else {
                    alert("At least one certificate is required!");
                }
            }
        });

        // File Preview Function
        function attachPreview(input, nameSpan, previewImg) {
            input.addEventListener('change', function() {
                if (this.files.length > 0) {
                    nameSpan.textContent = this.files[0].name;
                    const reader = new FileReader();
                    reader.onload = function(e) {
                        previewImg.src = e.target.result;
                        previewImg.classList.remove('hidden');
                    };
                    reader.readAsDataURL(this.files[0]);
                } else {
                    nameSpan.textContent = '';
                    previewImg.src = '';
                    previewImg.classList.add('hidden');
                }
            });
        }

        // Attach preview to existing items
        @foreach ($savedCerts as $index => $cert)
            attachPreview(
                document.getElementById('cert_file_{{ $index }}'),
                document.getElementById('cert-file-name-{{ $index }}'),
                document.getElementById('cert-preview-{{ $index }}')
            );
        @endforeach
    </script>
@endsection