@extends('layouts.app')
@section('title', '설비 엑셀 Import')
@section('content')

<div class="max-w-4xl mx-auto">
    <div class="flex justify-between items-center mb-6">
        <h1 class="text-2xl font-bold text-gray-800">설비 엑셀 Import</h1>
        <a href="{{ route('equipment.index') }}" class="text-gray-600 hover:text-gray-800">
            &larr; 목록으로
        </a>
    </div>

    <!-- 단계 표시 -->
    <div class="flex items-center gap-2 mb-6">
        <span id="step1Badge" class="inline-flex items-center px-3 py-1 rounded-full text-sm font-medium bg-blue-100 text-blue-800">1. 파일 업로드</span>
        <svg class="w-4 h-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"/></svg>
        <span id="step2Badge" class="inline-flex items-center px-3 py-1 rounded-full text-sm font-medium bg-gray-100 text-gray-500">2. 미리보기</span>
        <svg class="w-4 h-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"/></svg>
        <span id="step3Badge" class="inline-flex items-center px-3 py-1 rounded-full text-sm font-medium bg-gray-100 text-gray-500">3. 결과</span>
    </div>

    <!-- Step 1: 파일 업로드 -->
    <div id="step1" class="bg-white rounded-lg shadow-sm p-6">
        <h2 class="text-lg font-semibold text-gray-800 mb-4">엑셀 파일 선택</h2>
        <p class="text-sm text-gray-500 mb-4">
            지원 형식: .xlsx, .xls (최대 10MB)<br>
            첫 번째 행은 헤더로 인식합니다 (설비코드, 설비명, 설비유형, 규격, 제조사, 모델명, 제조번호, 위치, 생산라인, 구입일, 설치일, 구입가격, 내용연수, 상태, 담당자, 비고)
        </p>

        <div id="fileDropzone"
             class="border-2 border-dashed border-gray-300 rounded-lg p-8 text-center cursor-pointer hover:border-blue-400 transition">
            <svg class="mx-auto h-12 w-12 text-gray-400 mb-3" 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>
            <p class="text-gray-500">클릭하거나 엑셀 파일을 드래그하세요</p>
            <input type="file" id="fileInput" accept=".xlsx,.xls" class="hidden">
        </div>
        <div id="selectedFile" class="mt-3" style="display: none;">
            <p class="text-sm text-gray-700"><span id="fileName"></span></p>
        </div>

        <div class="mt-4">
            <label class="block text-sm font-semibold text-gray-700 mb-2">중복 설비코드 처리</label>
            <select id="duplicateAction" class="px-4 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-blue-500">
                <option value="skip">건너뛰기 (기존 데이터 유지)</option>
                <option value="overwrite">덮어쓰기 (기존 데이터 갱신)</option>
            </select>
        </div>

        <button id="previewBtn" onclick="doPreview()" disabled
                class="mt-4 bg-blue-600 hover:bg-blue-700 disabled:bg-gray-300 text-white px-6 py-2 rounded-lg transition">
            미리보기
        </button>
    </div>

    <!-- Step 2: 미리보기 -->
    <div id="step2" class="bg-white rounded-lg shadow-sm p-6 mt-4" style="display: none;">
        <div class="flex justify-between items-center mb-4">
            <h2 class="text-lg font-semibold text-gray-800">미리보기</h2>
            <p class="text-sm text-gray-500" id="previewInfo"></p>
        </div>
        <div class="overflow-x-auto">
            <table class="min-w-full text-sm" id="previewTable">
                <thead id="previewHead" class="bg-gray-50"></thead>
                <tbody id="previewBody"></tbody>
            </table>
        </div>
        <div class="flex gap-3 mt-4">
            <button onclick="doImport()" class="bg-green-600 hover:bg-green-700 text-white px-6 py-2 rounded-lg transition">
                Import 실행
            </button>
            <button onclick="resetForm()" class="bg-gray-200 hover:bg-gray-300 text-gray-800 px-6 py-2 rounded-lg transition">
                다시 선택
            </button>
        </div>
    </div>

    <!-- Step 3: 결과 -->
    <div id="step3" class="bg-white rounded-lg shadow-sm p-6 mt-4" style="display: none;">
        <h2 class="text-lg font-semibold text-gray-800 mb-4">Import 결과</h2>
        <div class="grid grid-cols-3 gap-4 mb-4">
            <div class="text-center p-4 bg-green-50 rounded-lg">
                <p class="text-2xl font-bold text-green-600" id="resultSuccess">0</p>
                <p class="text-sm text-green-700">성공</p>
            </div>
            <div class="text-center p-4 bg-yellow-50 rounded-lg">
                <p class="text-2xl font-bold text-yellow-600" id="resultSkipped">0</p>
                <p class="text-sm text-yellow-700">건너뜀</p>
            </div>
            <div class="text-center p-4 bg-red-50 rounded-lg">
                <p class="text-2xl font-bold text-red-600" id="resultFailed">0</p>
                <p class="text-sm text-red-700">실패</p>
            </div>
        </div>
        <div id="resultErrors" style="display: none;" class="mb-4">
            <h3 class="text-sm font-semibold text-red-700 mb-2">오류 상세</h3>
            <ul id="errorList" class="text-sm text-red-600 list-disc pl-5"></ul>
        </div>
        <div class="flex gap-3">
            <a href="{{ route('equipment.index') }}" class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-2 rounded-lg transition">
                설비 목록으로
            </a>
            <button onclick="resetForm()" class="bg-gray-200 hover:bg-gray-300 text-gray-800 px-6 py-2 rounded-lg transition">
                추가 Import
            </button>
        </div>
    </div>

    <!-- 로딩 -->
    <div id="loadingOverlay" style="display: none;" class="fixed inset-0 bg-black bg-opacity-30 flex items-center justify-center z-50">
        <div class="bg-white rounded-lg p-6 text-center">
            <div class="animate-spin rounded-full h-10 w-10 border-b-2 border-blue-600 mx-auto mb-3"></div>
            <p class="text-gray-700" id="loadingText">처리 중...</p>
        </div>
    </div>
</div>

@endsection

@push('scripts')
<script>
    const csrfToken = '{{ csrf_token() }}';
    let selectedFile = null;

    // 파일 선택
    const dropzone = document.getElementById('fileDropzone');
    const fileInput = document.getElementById('fileInput');

    dropzone.addEventListener('click', () => fileInput.click());
    dropzone.addEventListener('dragover', (e) => { e.preventDefault(); dropzone.classList.add('border-blue-400', 'bg-blue-50'); });
    dropzone.addEventListener('dragleave', () => { dropzone.classList.remove('border-blue-400', 'bg-blue-50'); });
    dropzone.addEventListener('drop', (e) => {
        e.preventDefault();
        dropzone.classList.remove('border-blue-400', 'bg-blue-50');
        if (e.dataTransfer.files.length) selectFile(e.dataTransfer.files[0]);
    });
    fileInput.addEventListener('change', (e) => { if (e.target.files.length) selectFile(e.target.files[0]); });

    function selectFile(file) {
        if (!file.name.match(/\.(xlsx|xls)$/i)) {
            showToast('엑셀 파일(.xlsx, .xls)만 지원합니다.', 'error');
            return;
        }
        selectedFile = file;
        document.getElementById('fileName').textContent = file.name + ' (' + (file.size / 1024).toFixed(1) + ' KB)';
        document.getElementById('selectedFile').style.display = 'block';
        document.getElementById('previewBtn').disabled = false;
    }

    function setStep(step) {
        ['step1Badge', 'step2Badge', 'step3Badge'].forEach((id, i) => {
            const el = document.getElementById(id);
            if (i + 1 <= step) {
                el.classList.remove('bg-gray-100', 'text-gray-500');
                el.classList.add('bg-blue-100', 'text-blue-800');
            } else {
                el.classList.remove('bg-blue-100', 'text-blue-800');
                el.classList.add('bg-gray-100', 'text-gray-500');
            }
        });
    }

    function doPreview() {
        if (!selectedFile) return;
        document.getElementById('loadingOverlay').style.display = 'flex';
        document.getElementById('loadingText').textContent = '파일 분석 중...';

        const formData = new FormData();
        formData.append('file', selectedFile);

        fetch('/api/admin/equipment/import/preview', {
            method: 'POST',
            headers: { 'X-CSRF-TOKEN': csrfToken, 'Accept': 'application/json' },
            body: formData
        })
        .then(r => r.json())
        .then(data => {
            document.getElementById('loadingOverlay').style.display = 'none';
            if (data.success) {
                showPreview(data.data);
                setStep(2);
            } else {
                showToast(data.message || '미리보기 실패', 'error');
            }
        })
        .catch(() => {
            document.getElementById('loadingOverlay').style.display = 'none';
            showToast('서버 오류가 발생했습니다.', 'error');
        });
    }

    function showPreview(data) {
        document.getElementById('step2').style.display = 'block';
        document.getElementById('previewInfo').textContent =
            `전체 ${data.total_rows}행 중 ${data.preview.length}행 미리보기 | 매핑된 컬럼: ${data.mapped_columns}개`;

        const head = document.getElementById('previewHead');
        const body = document.getElementById('previewBody');
        head.innerHTML = '<tr>' + data.headers.map(h => `<th class="px-3 py-2 text-left font-medium text-gray-700">${h}</th>`).join('') + '</tr>';
        body.innerHTML = '';

        data.preview.forEach(row => {
            const tr = document.createElement('tr');
            tr.className = 'border-t';
            tr.innerHTML = data.headers.map(h => `<td class="px-3 py-2 text-gray-600">${row[h] ?? '-'}</td>`).join('');
            body.appendChild(tr);
        });
    }

    function doImport() {
        if (!selectedFile) return;
        document.getElementById('loadingOverlay').style.display = 'flex';
        document.getElementById('loadingText').textContent = 'Import 실행 중...';

        const formData = new FormData();
        formData.append('file', selectedFile);
        formData.append('duplicate_action', document.getElementById('duplicateAction').value);

        fetch('/api/admin/equipment/import', {
            method: 'POST',
            headers: { 'X-CSRF-TOKEN': csrfToken, 'Accept': 'application/json' },
            body: formData
        })
        .then(r => r.json())
        .then(data => {
            document.getElementById('loadingOverlay').style.display = 'none';
            if (data.success) {
                showResult(data.data);
                setStep(3);
                showToast(data.message, 'success');
            } else {
                showToast(data.message || 'Import 실패', 'error');
            }
        })
        .catch(() => {
            document.getElementById('loadingOverlay').style.display = 'none';
            showToast('서버 오류가 발생했습니다.', 'error');
        });
    }

    function showResult(data) {
        document.getElementById('step2').style.display = 'none';
        document.getElementById('step3').style.display = 'block';
        document.getElementById('resultSuccess').textContent = data.success;
        document.getElementById('resultSkipped').textContent = data.skipped;
        document.getElementById('resultFailed').textContent = data.failed;

        if (data.errors && data.errors.length > 0) {
            document.getElementById('resultErrors').style.display = 'block';
            const list = document.getElementById('errorList');
            list.innerHTML = '';
            data.errors.forEach(err => {
                const li = document.createElement('li');
                li.textContent = err;
                list.appendChild(li);
            });
        }
    }

    function resetForm() {
        selectedFile = null;
        fileInput.value = '';
        document.getElementById('selectedFile').style.display = 'none';
        document.getElementById('previewBtn').disabled = true;
        document.getElementById('step2').style.display = 'none';
        document.getElementById('step3').style.display = 'none';
        document.getElementById('resultErrors').style.display = 'none';
        setStep(1);
    }
</script>
@endpush