@extends('admin.layouts.app')

@section('page-title', 'Invoices')

@section('content')
<style>
  html, body {
    overflow-x: hidden !important;
    max-width: 100%;
  }

  @import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
  :root { 
    --admin-font: 'Inter', sans-serif; 
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #10b981, #34d399);
    --warning-gradient: linear-gradient(135deg, #fef3c7, #fde68a);
    --danger-gradient: linear-gradient(135deg, #fef2f2, #fecaca);
    --info-gradient: linear-gradient(135deg, #dbeafe, #bfdbfe);
    --purple-gradient: linear-gradient(135deg, #e9d5ff, #d8b4fe);
  }
  
  body, input, select, textarea, button, table, th, td, .orders-container {
    font-family: var(--admin-font);
  }

  :root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --border-light: #e5e7eb;
    --bg-container: #ffffff;
    --bg-light: #f9fafb;
    --bg-hover: #f3f4f6;
    --text-dark: #1f2937;
    --text-muted: #6b7280;
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  }

  .orders-container {
    background: var(--bg-container);
    padding: 24px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    margin-top: 28px;
    border: 1px solid rgba(0,0,0,0.05);
  }

  .orders-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .orders-title i {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 32px;
  }

  .stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
  }

  .stat-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
  }

  .stat-card.total { border-left-color: #667eea; }
  .stat-card.paid { border-left-color: #10b981; }
  .stat-card.pending { border-left-color: #f59e0b; }
  .stat-card.overdue { border-left-color: #ef4444; }

  .stat-value {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .stat-label {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
  }

  .download-section {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 20px;
    gap: 12px;
  }

  .download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
  }

  .download-btn i {
    font-size: 16px;
  }

  .download-btn.pdf {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
  }

  .download-btn.pdf:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
  }

  .download-btn.excel {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
  }

  .download-btn.excel:hover {
    background: linear-gradient(135deg, #059669, #047857);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
  }

  .download-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
  }

  .table-wrapper {
    overflow-x: auto;
    max-width: 100%;
    border-radius: 12px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    background: white;
  }

  .orders-table {
    width: 100%;
    min-width: 1000px;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 14px;
    color: var(--text-dark);
  }

  .orders-table thead {
    background: var(--primary-gradient);
    position: sticky;
    top: 0;
    z-index: 10;
  }

  .orders-table th {
    padding: 16px 20px;
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    color: white;
    border-bottom: none;
    white-space: nowrap;
    position: relative;
    transition: background 0.3s ease;
  }

  .orders-table th:hover {
    background: rgba(255, 255, 255, 0.1);
  }

  .orders-table th:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 16px;
    background: rgba(255, 255, 255, 0.3);
  }

  .orders-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-light);
    white-space: nowrap;
    text-align: center;
    transition: background 0.2s ease;
  }

  .orders-table tbody tr:last-child td {
    border-bottom: none;
  }

  .orders-table tbody tr:hover td {
    background: var(--bg-hover);
  }

  .status-badge {
    font-size: 11px !important;
    font-weight: 600 !important;
    padding: 8px 14px 8px 10px !important;
    border-radius: 20px !important;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    color: #fff !important;
    border: 2px solid transparent !important;
    min-width: 40px;
    box-sizing: border-box;
    line-height: 1.2;
    gap: 6px;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    margin: 0 auto;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }

  .status-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
  }

  .status-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: inherit;
    opacity: 0.9;
    z-index: -1;
  }

  .status-icon {
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
  }

  .status-paid {
    background: var(--success-gradient) !important;
    color: white !important;
    border-color: #059669 !important;
    width: 99px;
  }

  .status-pending {
    background: var(--warning-gradient) !important;
    color: #d97706 !important;
    border-color: #f59e0b !important;
    width: 99px;
  }

  .status-overdue {
    background: var(--danger-gradient) !important;
    color: #dc2626 !important;
    border-color: #ef4444 !important;
    width: 99px;
  }

  .no-data {
    padding: 60px 40px;
    text-align: center;
    font-size: 16px;
    color: var(--text-muted);
    background: var(--bg-light);
    border-radius: 12px;
    margin-top: 10px;
    border: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .no-data i {
    font-size: 48px;
    color: #d1d5db;
  }

  .pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding: 16px 0;
    border-top: 1px solid #eef3fb;
  }

  .pagination-info {
    font-size: 14px;
    color: #6b7280;
    font-weight: 500;
  }

  .pagination-controls {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .pagination-img-btn {
    background: white;
    border: 1px solid #e3eaf6;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    box-shadow: var(--shadow-sm);
  }

  .pagination-img-btn:hover:not(:disabled) {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
  }

  .pagination-img-btn:disabled {
    background: #f8fafc;
    border-color: #e2e8f0;
    cursor: not-allowed;
    opacity: 0.5;
  }

  .pagination-page-btn {
    background: white;
    border: 1px solid #e3eaf6;
    color: #1a2951;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 40px;
    text-align: center;
    box-shadow: var(--shadow-sm);
  }

  .pagination-page-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
  }

  .pagination-page-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
  }

  .pagination-pages {
    display: flex;
    gap: 4px;
    align-items: center;
  }

  .pagination-ellipsis {
    color: #9ba5bb;
    font-size: 14px;
    padding: 0 8px;
  }

  .filter-bar {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    align-items: center;
  }

  .search-box {
    flex: 1;
    min-width: 300px;
    position: relative;
  }

  .search-input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: white;
    box-shadow: var(--shadow-sm);
  }

  .search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  }

  .search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
  }

  .filter-select {
    padding: 12px 16px;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    font-size: 14px;
    background: white;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    min-width: 160px;
  }

  .date-range {
    display: flex;
    gap: 12px;
    align-items: center;
  }

  .date-input {
    padding: 12px 16px;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    font-size: 14px;
    background: white;
    box-shadow: var(--shadow-sm);
    min-width: 150px;
  }

  .date-label {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
    white-space: nowrap;
  }

  @media(max-width: 768px) {
    .orders-title { font-size: 24px; }
    .orders-container { padding: 16px; }
    .stats-container { grid-template-columns: 1fr; }
    .stat-card { padding: 16px; }
    .stat-value { font-size: 24px; }

    .download-section { justify-content: stretch; }
    .download-btn { flex: 1; justify-content: center; }

    .filter-bar { flex-direction: column; align-items: stretch; }
    .search-box { min-width: 100%; }
    .filter-select, .date-input { width: 100%; }
    .date-range { flex-direction: column; align-items: stretch; }

    .pagination-container { flex-direction: column; gap: 16px; }
  }
</style>

<div class="orders-container">
  <div class="orders-title">
    <i class="fas fa-file-invoice-dollar"></i> Invoices Management
  </div>

  {{-- Stats Cards based on invoices --}}
  <div class="stats-container">
    @php
      $totalInvoices   = $invoices->count();
      $paidInvoices    = $invoices->where('invoice_status', 'paid')->count();
      $pendingInvoices = $invoices->where('invoice_status', 'pending')->count();
      $overdueInvoices = $invoices->where('invoice_status', 'overdue')->count();
    @endphp
    
    <div class="stat-card total">
      <div class="stat-value">{{ $totalInvoices }}</div>
      <div class="stat-label">Total Invoices</div>
    </div>
    <div class="stat-card paid">
      <div class="stat-value">{{ $paidInvoices }}</div>
      <div class="stat-label">Paid Invoices</div>
    </div>
    <div class="stat-card pending">
      <div class="stat-value">{{ $pendingInvoices }}</div>
      <div class="stat-label">Pending Invoices</div>
    </div>
    <div class="stat-card overdue">
      <div class="stat-value">{{ $overdueInvoices }}</div>
      <div class="stat-label">Overdue Invoices</div>
    </div>
  </div>

  <div class="download-section">
    <button class="download-btn pdf" id="downloadPdf" {{ $invoices->count() == 0 ? 'disabled' : '' }}>
      <i class="fas fa-file-pdf"></i>
      Download PDF
    </button>
    <button class="download-btn excel" id="downloadExcel" {{ $invoices->count() == 0 ? 'disabled' : '' }}>
      <i class="fas fa-file-excel"></i>
      Download Excel
    </button>
  </div>

  <div class="filter-bar">
    <div class="search-box">
      <i class="fas fa-search search-icon"></i>
      <input type="text" class="search-input" placeholder="Search invoices..." id="searchInput">
    </div>
    
    <select class="filter-select" id="statusFilter">
      <option value="">All Invoice Status</option>
      <option value="paid">Paid</option>
      <option value="pending">Pending</option>
      <option value="overdue">Overdue</option>
    </select>
    
    <div class="date-range">
      <span class="date-label">From:</span>
      <input type="date" class="date-input" id="fromDate">
      <span class="date-label">To:</span>
      <input type="date" class="date-input" id="toDate">
    </div>
  </div>

  @if($invoices->count() > 0)
    <div class="table-wrapper">
      <table class="orders-table">
        <thead>
          <tr>
            <th>Invoice No</th>
            <th>Invoice Date</th>
            <th>Mark No</th>
            <th>Container No</th>
            <th>Container Date</th>
            <th>Company</th>
            <th>Customer</th>
            <th>Amount</th>
            <th>Amount + GST</th>
            <th>Status</th>
          </tr>
        </thead>
        <tbody id="ordersTableBody">
          @foreach($invoices as $inv)
            @php
              $status = strtolower($inv->invoice_status ?? 'pending');
            @endphp
            <tr>
              <td>{{ $inv->invoice_number }}</td>
              <td>{{ $inv->invoice_date ? \Carbon\Carbon::parse($inv->invoice_date)->format('d-m-Y') : '-' }}</td>
              <td>{{ $inv->mark_no ?? '-' }}</td>
              <td>{{ $inv->container_number ?? '-' }}</td>
              <td>{{ $inv->container_date ? \Carbon\Carbon::parse($inv->container_date)->format('d-m-Y') : '-' }}</td>
              <td>{{ $inv->company_name ?? '-' }}</td>
              <td>{{ $inv->customer_name ?? '-' }}</td>
              <td>{{ $inv->final_amount ? '₹'.number_format($inv->final_amount, 2) : '-' }}</td>
              <td>{{ $inv->final_amount_with_gst ? '₹'.number_format($inv->final_amount_with_gst, 2) : '-' }}</td>
              <td>
                <span class="status-badge status-{{ $status }}">
                  {{ ucfirst($status) }}
                </span>
              </td>
            </tr>
          @endforeach
        </tbody>
      </table>
    </div>

    <div class="pagination-container">
      <div class="pagination-info" id="pageInfo">
        Showing 1 to {{ min(10, count($invoices)) }} of {{ count($invoices) }} entries
      </div>
      <div class="pagination-controls">
        <button class="pagination-img-btn" id="prevPageBtn" title="Previous page" disabled>
          <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
            <path d="M10 12L6 8L10 4" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
          </svg>
        </button>
        <div class="pagination-pages" id="paginationPages"></div>
        <button class="pagination-img-btn" id="nextPageBtn" title="Next page" {{ count($invoices) > 10 ? '' : 'disabled' }}>
          <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
            <path d="M6 4L10 8L6 12" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
          </svg>
        </button>
      </div>
    </div>
  @else
    <div class="no-data">
      <i class="fas fa-inbox"></i>
      <div>No invoices found</div>
      <p class="text-muted">There are currently no invoices in the system.</p>
    </div>
  @endif
</div>

<script>
  let currentPage = 1;
  const itemsPerPage = 10;
  let allInvoices = {!! $invoices->toJson() !!};
  let filteredInvoices = [...allInvoices];

  function getInvoiceStatusIcon(status) {
    switch(status) {
      case 'paid':    return '<i class="fas fa-check-circle status-icon"></i>';
      case 'pending': return '<i class="fas fa-clock status-icon"></i>';
      case 'overdue': return '<i class="fas fa-exclamation-triangle status-icon"></i>';
      default:        return '';
    }
  }

  function isValidDate(dateString) {
    if (!dateString) return false;
    const date = new Date(dateString);
    return date instanceof Date && !isNaN(date);
  }

  function isDateBetween(dateToCheck, fromDate, toDate) {
    if (!dateToCheck) return true;
    const checkDate = new Date(dateToCheck);
    if (!isValidDate(checkDate)) return true;
    checkDate.setHours(0,0,0,0);

    if (fromDate && isValidDate(fromDate)) {
      const from = new Date(fromDate);
      from.setHours(0,0,0,0);
      if (checkDate < from) return false;
    }

    if (toDate && isValidDate(toDate)) {
      const to = new Date(toDate);
      to.setHours(23,59,59,999);
      if (checkDate > to) return false;
    }
    return true;
  }

  function invoiceMatchesFilters(inv, searchTerm, statusFilter, fromDate, toDate) {
    let matchesSearch = true;
    if (searchTerm) {
      const term = searchTerm.toLowerCase();
      const fields = [
        inv.invoice_number?.toString().toLowerCase(),
        inv.mark_no?.toString().toLowerCase(),
        inv.container_number?.toString().toLowerCase(),
        inv.company_name?.toString().toLowerCase(),
        inv.customer_name?.toString().toLowerCase()
      ];
      matchesSearch = fields.some(f => f && f.includes(term));
    }

    const status = (inv.invoice_status || 'pending').toLowerCase();
    const matchesStatus = !statusFilter || status === statusFilter;

    const invDate = inv.invoice_date;
    const matchesDate = isDateBetween(invDate, fromDate, toDate);

    return matchesSearch && matchesStatus && matchesDate;
  }

  document.addEventListener('DOMContentLoaded', function () {
    renderTable();
    updatePaginationControls();

    document.getElementById('prevPageBtn').addEventListener('click', goToPreviousPage);
    document.getElementById('nextPageBtn').addEventListener('click', goToNextPage);

    document.getElementById('searchInput').addEventListener('input', handleFilter);
    document.getElementById('statusFilter').addEventListener('change', handleFilter);
    document.getElementById('fromDate').addEventListener('change', handleFilter);
    document.getElementById('toDate').addEventListener('change', handleFilter);

    document.getElementById('downloadPdf').addEventListener('click', downloadPdf);
    document.getElementById('downloadExcel').addEventListener('click', downloadExcel);
  });

  function handleFilter() {
    const searchTerm   = document.getElementById('searchInput').value;
    const statusFilter = document.getElementById('statusFilter').value;
    const fromDate     = document.getElementById('fromDate').value;
    const toDate       = document.getElementById('toDate').value;

    filteredInvoices = allInvoices.filter(inv =>
      invoiceMatchesFilters(inv, searchTerm, statusFilter, fromDate, toDate)
    );

    currentPage = 1;
    renderTable();
    updatePaginationControls();

    const hasResults = filteredInvoices.length > 0;
    document.getElementById('downloadPdf').disabled = !hasResults;
    document.getElementById('downloadExcel').disabled = !hasResults;
  }

  function goToPreviousPage() {
    if (currentPage > 1) {
      currentPage--;
      renderTable();
      updatePaginationControls();
    }
  }

  function goToNextPage() {
    const totalPages = Math.ceil(filteredInvoices.length / itemsPerPage);
    if (currentPage < totalPages) {
      currentPage++;
      renderTable();
      updatePaginationControls();
    }
  }

  function updatePaginationControls() {
    const totalPages = Math.ceil(filteredInvoices.length / itemsPerPage);
    const prevBtn = document.getElementById('prevPageBtn');
    const nextBtn = document.getElementById('nextPageBtn');
    const pageInfo = document.getElementById('pageInfo');
    const paginationPages = document.getElementById('paginationPages');

    prevBtn.disabled = currentPage === 1;
    nextBtn.disabled = currentPage === totalPages || totalPages === 0;

    const startIndex = (currentPage - 1) * itemsPerPage + 1;
    const endIndex = Math.min(currentPage * itemsPerPage, filteredInvoices.length);
    pageInfo.textContent = `Showing ${startIndex} to ${endIndex} of ${filteredInvoices.length} entries`;

    paginationPages.innerHTML = '';
    if (totalPages <= 7) {
      for (let i = 1; i <= totalPages; i++) addPageButton(i, paginationPages);
    } else {
      addPageButton(1, paginationPages);
      if (currentPage > 3) paginationPages.innerHTML += '<span class="pagination-ellipsis">...</span>';

      const start = Math.max(2, currentPage - 1);
      const end   = Math.min(totalPages - 1, currentPage + 1);
      for (let i = start; i <= end; i++) addPageButton(i, paginationPages);

      if (currentPage < totalPages - 2) paginationPages.innerHTML += '<span class="pagination-ellipsis">...</span>';
      addPageButton(totalPages, paginationPages);
    }
  }

  function addPageButton(pageNumber, container) {
    const button = document.createElement('button');
    button.className = 'pagination-page-btn';
    if (pageNumber === currentPage) button.classList.add('active');
    button.textContent = pageNumber;
    button.addEventListener('click', () => {
      currentPage = pageNumber;
      renderTable();
      updatePaginationControls();
    });
    container.appendChild(button);
  }

  function renderTable() {
    const tbody = document.getElementById('ordersTableBody');
    tbody.innerHTML = '';

    if (filteredInvoices.length === 0) {
      tbody.innerHTML = '<tr><td colspan="10" class="text-center py-4 text-muted">No invoices found matching your criteria.</td></tr>';
      return;
    }

    const startIndex = (currentPage - 1) * itemsPerPage;
    const endIndex   = startIndex + itemsPerPage;
    const paginated  = filteredInvoices.slice(startIndex, endIndex);

    paginated.forEach(inv => {
      const status = (inv.invoice_status || 'pending').toLowerCase();
      const row = document.createElement('tr');
      row.innerHTML = `
        <td>${inv.invoice_number || '-'}</td>
        <td>${inv.invoice_date ? new Date(inv.invoice_date).toLocaleDateString('en-GB') : '-'}</td>
        <td>${inv.mark_no || '-'}</td>
        <td>${inv.container_number || '-'}</td>
        <td>${inv.container_date ? new Date(inv.container_date).toLocaleDateString('en-GB') : '-'}</td>
        <td>${inv.company_name || '-'}</td>
        <td>${inv.customer_name || '-'}</td>
        <td>${inv.final_amount ? '₹' + Number(inv.final_amount).toLocaleString('en-IN', {minimumFractionDigits: 2, maximumFractionDigits: 2}) : '-'}</td>
        <td>${inv.final_amount_with_gst ? '₹' + Number(inv.final_amount_with_gst).toLocaleString('en-IN', {minimumFractionDigits: 2, maximumFractionDigits: 2}) : '-'}</td>
        <td>
          <span class="status-badge status-${status}">
            ${getInvoiceStatusIcon(status)}${status.charAt(0).toUpperCase() + status.slice(1)}
          </span>
        </td>
      `;
      tbody.appendChild(row);
    });
  }

  function downloadPdf() {
    if (filteredInvoices.length === 0) {
      showNotification('No data available to download', 'warning');
      return;
    }

    showNotification('Preparing PDF download...', 'info');

    const searchTerm   = document.getElementById('searchInput').value;
    const statusFilter = document.getElementById('statusFilter').value;
    const fromDate     = document.getElementById('fromDate').value;
    const toDate       = document.getElementById('toDate').value;

    let downloadUrl = "{{ route('admin.orders.download.pdf') }}";
    let params = new URLSearchParams();
    params.append('search', searchTerm || '');
    params.append('status', statusFilter || '');
    params.append('from_date', fromDate || '');
    params.append('to_date', toDate || '');

    window.location.href = downloadUrl + '?' + params.toString();
  }

  function downloadExcel() {
    if (filteredInvoices.length === 0) {
      showNotification('No data available to download', 'warning');
      return;
    }

    showNotification('Preparing Excel download...', 'info');

    const searchTerm   = document.getElementById('searchInput').value;
    const statusFilter = document.getElementById('statusFilter').value;
    const fromDate     = document.getElementById('fromDate').value;
    const toDate       = document.getElementById('toDate').value;

    let downloadUrl = "{{ route('admin.orders.download.excel') }}";
    let params = new URLSearchParams();
    params.append('search', searchTerm || '');
    params.append('status', statusFilter || '');
    params.append('from_date', fromDate || '');
    params.append('to_date', toDate || '');

    window.location.href = downloadUrl + '?' + params.toString();
  }

  function showNotification(message, type = 'info') {
    const existing = document.querySelector('.download-notification');
    if (existing) existing.remove();

    const notification = document.createElement('div');
    notification.className = `download-notification alert alert-${type}`;
    notification.style.cssText = `
      position: fixed;
      top: 20px;
      right: 20px;
      z-index: 10000;
      padding: 12px 20px;
      border-radius: 8px;
      color: white;
      font-weight: 500;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      animation: slideIn 0.3s ease;
    `;

    if (type === 'info') {
      notification.style.background = 'linear-gradient(135deg, #3b82f6, #1d4ed8)';
    } else if (type === 'warning') {
      notification.style.background = 'linear-gradient(135deg, #f59e0b, #d97706)';
    } else if (type === 'success') {
      notification.style.background = 'linear-gradient(135deg, #10b981, #059669)';
    }

    notification.textContent = message;
    document.body.appendChild(notification);

    setTimeout(() => {
      notification.style.animation = 'slideOut 0.3s ease';
      setTimeout(() => notification.remove(), 300);
    }, 3000);
  }

  const style = document.createElement('style');
  style.textContent = `
    @keyframes slideIn {
      from { transform: translateX(100%); opacity: 0; }
      to   { transform: translateX(0); opacity: 1; }
    }
    @keyframes slideOut {
      from { transform: translateX(0); opacity: 1; }
      to   { transform: translateX(100%); opacity: 0; }
    }
  `;
  document.head.appendChild(style);
</script>

@endsection