'use client';

import { useState, useMemo } from 'react';
import {
  useReactTable,
  getCoreRowModel,
  getFilteredRowModel,
  getSortedRowModel,
  getPaginationRowModel,
  ColumnDef,
  flexRender,
  SortingState,
  ColumnFiltersState,
} from '@tanstack/react-table';
import { BarChart, Bar, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer, PieChart, Pie, Cell, LineChart, Line } from 'recharts';
import { Star, TrendingUp, Image, FileText, MessageSquare, Calendar, ArrowUpDown, ArrowUp, ArrowDown, Search, Download, Filter, AlertTriangle, ThumbsUp, ThumbsDown } from 'lucide-react';
import { Review, calculateReviewStats, getSentimentLabel, getSentimentColor, DateRange, filterReviewsByDateRange, calculateTimelineData } from '@/lib/analytics';

interface ReviewAnalyticsProps {
  reviews: Review[];
  businessName?: string;
}

export default function ReviewAnalytics({ reviews, businessName }: ReviewAnalyticsProps) {
  const [sorting, setSorting] = useState<SortingState>([{ id: 'date', desc: true }]); // Default: newest first
  const [columnFilters, setColumnFiltersState] = useState<ColumnFiltersState>([]);
  const [globalFilter, setGlobalFilter] = useState('');
  const [selectedRatings, setSelectedRatings] = useState<number[]>([1, 2, 3, 4, 5]);
  const [selectedSentiments, setSelectedSentiments] = useState<('positive' | 'neutral' | 'negative')[]>(['positive', 'neutral', 'negative']);
  const [dateRange, setDateRange] = useState<DateRange>('all');

  // Filter reviews by date range
  const dateFilteredReviews = useMemo(() => {
    return filterReviewsByDateRange(reviews, dateRange);
  }, [reviews, dateRange]);

  // Calculate statistics on date-filtered reviews
  const stats = useMemo(() => calculateReviewStats(dateFilteredReviews), [dateFilteredReviews]);

  // Calculate timeline data for chart
  const timelineData = useMemo(() => calculateTimelineData(dateFilteredReviews), [dateFilteredReviews]);

  // Filter reviews by selected ratings and sentiments (for table)
  const filteredReviews = useMemo(() => {
    return dateFilteredReviews.filter(r => {
      const matchesRating = selectedRatings.includes(r.rating);
      const sentiment = getSentimentLabel(r.rating);
      const matchesSentiment = selectedSentiments.includes(sentiment);
      const matchesSearch = !globalFilter ||
        r.author.toLowerCase().includes(globalFilter.toLowerCase()) ||
        r.text?.toLowerCase().includes(globalFilter.toLowerCase()) ||
        r.date_text.toLowerCase().includes(globalFilter.toLowerCase());

      return matchesRating && matchesSentiment && matchesSearch;
    });
  }, [dateFilteredReviews, selectedRatings, selectedSentiments, globalFilter]);

  const toggleRating = (rating: number) => {
    setSelectedRatings(prev =>
      prev.includes(rating) ? prev.filter(r => r !== rating) : [...prev, rating]
    );
  };

  const toggleSentiment = (sentiment: 'positive' | 'neutral' | 'negative') => {
    setSelectedSentiments(prev =>
      prev.includes(sentiment) ? prev.filter(s => s !== sentiment) : [...prev, sentiment]
    );
  };

  const clearAllFilters = () => {
    setDateRange('all');
    setSelectedRatings([1, 2, 3, 4, 5]);
    setSelectedSentiments(['positive', 'neutral', 'negative']);
    setGlobalFilter('');
  };

  const hasActiveFilters = dateRange !== 'all' ||
    selectedRatings.length < 5 ||
    selectedSentiments.length < 3 ||
    globalFilter !== '';

  const exportFilteredData = () => {
    const dataStr = JSON.stringify(filteredReviews, null, 2);
    const dataBlob = new Blob([dataStr], { type: 'application/json' });
    const url = URL.createObjectURL(dataBlob);
    const link = document.createElement('a');
    link.href = url;
    link.download = `reviews-filtered-${dateRange}-${new Date().toISOString().split('T')[0]}.json`;
    link.click();
  };

  // Chart colors
  const COLORS = {
    positive: '#16a34a',
    neutral: '#ca8a04',
    negative: '#dc2626',
  };

  // Table columns
  const columns = useMemo<ColumnDef<Review>[]>(
    () => [
      {
        accessorKey: 'author',
        header: ({ column }) => {
          return (
            <button
              onClick={() => column.toggleSorting(column.getIsSorted() === 'asc')}
              className="flex items-center gap-2 hover:text-blue-700 font-semibold"
            >
              Author
              {column.getIsSorted() === 'asc' ? <ArrowUp className="w-4 h-4" /> : column.getIsSorted() === 'desc' ? <ArrowDown className="w-4 h-4" /> : <ArrowUpDown className="w-4 h-4 opacity-50" />}
            </button>
          );
        },
        cell: ({ row }) => (
          <div className="flex items-center gap-2">
            {row.original.avatar_url && (
              <img src={row.original.avatar_url} alt={row.original.author} className="w-8 h-8 rounded-full" />
            )}
            <span className="font-medium text-gray-900">{row.original.author}</span>
          </div>
        ),
      },
      {
        accessorKey: 'rating',
        header: ({ column }) => {
          return (
            <button
              onClick={() => column.toggleSorting(column.getIsSorted() === 'asc')}
              className="flex items-center gap-2 hover:text-blue-700 font-semibold"
            >
              Rating
              {column.getIsSorted() === 'asc' ? <ArrowUp className="w-4 h-4" /> : column.getIsSorted() === 'desc' ? <ArrowDown className="w-4 h-4" /> : <ArrowUpDown className="w-4 h-4 opacity-50" />}
            </button>
          );
        },
        cell: ({ row }) => (
          <div className="flex items-center gap-1">
            {[...Array(5)].map((_, i) => (
              <Star
                key={i}
                className={`w-4 h-4 ${i < row.original.rating ? 'text-yellow-500 fill-yellow-500' : 'text-gray-300'}`}
              />
            ))}
            <span className="ml-2 font-bold text-gray-900">{row.original.rating}</span>
          </div>
        ),
        filterFn: (row, id, value) => {
          return value.includes(row.getValue(id));
        },
      },
      {
        accessorKey: 'centerDate',
        id: 'date',
        header: ({ column }) => {
          return (
            <button
              onClick={() => column.toggleSorting(column.getIsSorted() === 'asc')}
              className="flex items-center gap-2 hover:text-blue-700 font-semibold"
            >
              Date
              {column.getIsSorted() === 'asc' ? <ArrowUp className="w-4 h-4" /> : column.getIsSorted() === 'desc' ? <ArrowDown className="w-4 h-4" /> : <ArrowUpDown className="w-4 h-4 opacity-50" />}
            </button>
          );
        },
        sortingFn: (rowA, rowB) => {
          const dateA = rowA.original.centerDate?.getTime() || 0;
          const dateB = rowB.original.centerDate?.getTime() || 0;
          return dateA - dateB;
        },
        cell: ({ row }) => {
          const formatDate = (date: Date) => {
            return date.toLocaleDateString('en-US', { year: 'numeric', month: 'short', day: 'numeric' });
          };

          const getUncertaintyDays = (minDate: Date, maxDate: Date) => {
            const diffMs = Math.abs(maxDate.getTime() - minDate.getTime());
            return Math.round(diffMs / (1000 * 60 * 60 * 24));
          };

          return (
            <div className="space-y-1">
              <div className="text-gray-900 font-medium">{row.original.date_text}</div>
              {row.original.minDate && row.original.maxDate && row.original.centerDate && (
                <div className="text-xs text-gray-500 space-y-0.5">
                  <div>Range: {formatDate(row.original.maxDate)} - {formatDate(row.original.minDate)}</div>
                  <div className="text-purple-700 font-semibold">
                    Center: {formatDate(row.original.centerDate)}
                  </div>
                  <div className="text-blue-600">
                    ±{getUncertaintyDays(row.original.minDate, row.original.maxDate)} days uncertainty
                  </div>
                </div>
              )}
            </div>
          );
        },
      },
      {
        accessorKey: 'text',
        header: 'Review',
        cell: ({ row }) => {
          const [expanded, setExpanded] = useState(false);
          const text = row.original.text || 'No review text';
          const sentiment = getSentimentLabel(row.original.rating);

          return (
            <div className="max-w-2xl">
              <div className={`inline-block px-2 py-1 rounded-md text-xs font-semibold mb-2 border ${getSentimentColor(sentiment)}`}>
                {sentiment.toUpperCase()}
              </div>
              <p className={`text-gray-800 ${!expanded && 'line-clamp-2'}`}>
                {text}
              </p>
              {text.length > 100 && (
                <button
                  onClick={() => setExpanded(!expanded)}
                  className="text-blue-700 hover:text-blue-800 text-sm font-semibold mt-1"
                >
                  {expanded ? 'Show less' : 'Show more'}
                </button>
              )}
            </div>
          );
        },
      },
    ],
    []
  );

  const table = useReactTable({
    data: filteredReviews,
    columns,
    state: {
      sorting,
    },
    onSortingChange: setSorting,
    getCoreRowModel: getCoreRowModel(),
    getSortedRowModel: getSortedRowModel(),
    getPaginationRowModel: getPaginationRowModel(),
    initialState: {
      pagination: {
        pageSize: 10,
      },
    },
  });

  return (
    <div className="space-y-6">
      {/* Header */}
      <div className="flex items-center justify-between">
        <div>
          <h2 className="text-3xl font-bold text-gray-900">
            {businessName ? `${businessName} - Analytics` : 'Review Analytics'}
          </h2>
          <p className="text-gray-600 mt-1">Comprehensive insights from {reviews.length} total reviews</p>
        </div>
      </div>

      {/* Enhanced Filters */}
      <div className="bg-white border-2 border-gray-300 rounded-xl p-5 shadow-sm space-y-4">
        {/* Time Period Filter */}
        <div className="flex items-center gap-3 flex-wrap">
          <Filter className="w-5 h-5 text-gray-700" />
          <span className="font-semibold text-gray-900">Time Period:</span>
          {(['week', 'month', 'year', 'all'] as DateRange[]).map((range) => (
            <button
              key={range}
              onClick={() => setDateRange(range)}
              className={`px-4 py-2 rounded-lg font-semibold transition-all border-2 ${
                dateRange === range
                  ? 'bg-blue-600 text-white border-blue-700 shadow-md'
                  : 'bg-white text-gray-700 border-gray-300 hover:border-blue-400 hover:bg-blue-50'
              }`}
            >
              {range === 'week' ? 'Last Week' : range === 'month' ? 'Last Month' : range === 'year' ? 'Last Year' : 'All Time'}
            </button>
          ))}
        </div>

        {/* Sentiment Filter */}
        <div className="flex items-center gap-3 flex-wrap">
          <TrendingUp className="w-5 h-5 text-gray-700" />
          <span className="font-semibold text-gray-900">Sentiment:</span>
          {(['positive', 'neutral', 'negative'] as const).map((sentiment) => (
            <button
              key={sentiment}
              onClick={() => toggleSentiment(sentiment)}
              className={`px-4 py-2 rounded-lg font-semibold transition-all border-2 ${
                selectedSentiments.includes(sentiment)
                  ? sentiment === 'positive' ? 'bg-green-600 text-white border-green-700 shadow-md'
                  : sentiment === 'neutral' ? 'bg-yellow-600 text-white border-yellow-700 shadow-md'
                  : 'bg-red-600 text-white border-red-700 shadow-md'
                  : 'bg-white text-gray-700 border-gray-300 hover:border-blue-400 hover:bg-blue-50'
              }`}
            >
              {sentiment === 'positive' ? '😊 Positive (4-5★)' : sentiment === 'neutral' ? '😐 Neutral (3★)' : '😞 Negative (1-2★)'}
            </button>
          ))}
        </div>

        {/* Filter Summary */}
        <div className="flex items-center justify-between pt-2 border-t-2 border-gray-200">
          <span className="text-sm font-medium text-gray-600">
            Showing {filteredReviews.length} of {reviews.length} reviews
            {hasActiveFilters && <span className="text-blue-700 ml-1">(filtered)</span>}
          </span>
          {hasActiveFilters && (
            <button
              onClick={clearAllFilters}
              className="px-3 py-1.5 bg-gray-100 text-gray-700 rounded-lg hover:bg-gray-200 font-semibold border-2 border-gray-300 text-sm"
            >
              Clear All Filters
            </button>
          )}
        </div>
      </div>

      {/* KPI Cards */}
      <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-4">
        {/* Average Rating */}
        <div className="bg-gradient-to-br from-yellow-100 to-yellow-200 border-2 border-yellow-400 rounded-xl p-4 shadow-md hover:shadow-lg transition-shadow">
          <div className="flex items-center justify-between mb-2">
            <div className="flex items-center gap-2">
              <Star className="w-5 h-5 text-yellow-700" />
              <span className="text-sm font-bold text-yellow-900">Avg Rating</span>
            </div>
          </div>
          <div className="text-3xl font-bold text-yellow-900">{stats.averageRating.toFixed(1)}★</div>
          <div className="text-xs text-yellow-800 mt-1 font-medium">
            {stats.totalReviews} total reviews
          </div>
        </div>

        {/* Positive Reviews */}
        <div className="bg-gradient-to-br from-green-100 to-green-200 border-2 border-green-400 rounded-xl p-4 shadow-md hover:shadow-lg transition-shadow cursor-pointer" onClick={() => { setSelectedSentiments(['positive']); setDateRange('all'); }}>
          <div className="flex items-center justify-between mb-2">
            <div className="flex items-center gap-2">
              <ThumbsUp className="w-5 h-5 text-green-700" />
              <span className="text-sm font-bold text-green-900">Positive</span>
            </div>
          </div>
          <div className="text-3xl font-bold text-green-900">{stats.sentimentBreakdown.positive}</div>
          <div className="text-xs text-green-800 mt-1 font-medium">
            {stats.sentimentScore.toFixed(0)}% positive (4-5★)
          </div>
        </div>

        {/* Neutral Reviews */}
        <div className="bg-gradient-to-br from-yellow-50 to-yellow-100 border-2 border-yellow-300 rounded-xl p-4 shadow-md hover:shadow-lg transition-shadow cursor-pointer" onClick={() => { setSelectedSentiments(['neutral']); setDateRange('all'); }}>
          <div className="flex items-center justify-between mb-2">
            <div className="flex items-center gap-2">
              <MessageSquare className="w-5 h-5 text-yellow-700" />
              <span className="text-sm font-bold text-yellow-800">Neutral</span>
            </div>
          </div>
          <div className="text-3xl font-bold text-yellow-800">{stats.sentimentBreakdown.neutral}</div>
          <div className="text-xs text-yellow-700 mt-1 font-medium">
            {((stats.sentimentBreakdown.neutral / stats.totalReviews) * 100).toFixed(0)}% neutral (3★)
          </div>
        </div>

        {/* Negative Reviews - Alert */}
        <div className="bg-gradient-to-br from-red-100 to-red-200 border-2 border-red-400 rounded-xl p-4 shadow-md hover:shadow-lg transition-shadow cursor-pointer" onClick={() => { setSelectedSentiments(['negative']); setDateRange('all'); }}>
          <div className="flex items-center justify-between mb-2">
            <div className="flex items-center gap-2">
              <AlertTriangle className="w-5 h-5 text-red-700" />
              <span className="text-sm font-bold text-red-900">Negative</span>
            </div>
          </div>
          <div className="text-3xl font-bold text-red-900">{stats.negativeReviews}</div>
          <div className="text-xs text-red-800 mt-1 font-medium">
            {((stats.negativeReviews / stats.totalReviews) * 100).toFixed(0)}% negative (1-2★)
          </div>
        </div>

        {/* Recent Activity */}
        <div className="bg-gradient-to-br from-blue-100 to-blue-200 border-2 border-blue-400 rounded-xl p-4 shadow-md hover:shadow-lg transition-shadow cursor-pointer" onClick={() => setDateRange('month')}>
          <div className="flex items-center justify-between mb-2">
            <div className="flex items-center gap-2">
              <Calendar className="w-5 h-5 text-blue-700" />
              <span className="text-sm font-bold text-blue-900">Recent</span>
            </div>
          </div>
          <div className="text-3xl font-bold text-blue-900">{stats.recentReviews}</div>
          <div className="text-xs text-blue-800 mt-1 font-medium">last 30 days</div>
        </div>

        {/* Review Length */}
        <div className="bg-gradient-to-br from-purple-100 to-purple-200 border-2 border-purple-400 rounded-xl p-4 shadow-md hover:shadow-lg transition-shadow">
          <div className="flex items-center justify-between mb-2">
            <div className="flex items-center gap-2">
              <FileText className="w-5 h-5 text-purple-700" />
              <span className="text-sm font-bold text-purple-900">Avg Length</span>
            </div>
          </div>
          <div className="text-3xl font-bold text-purple-900">{stats.avgReviewLength}</div>
          <div className="text-xs text-purple-800 mt-1 font-medium">words per review</div>
        </div>

        {/* Photos */}
        <div className="bg-gradient-to-br from-pink-100 to-pink-200 border-2 border-pink-400 rounded-xl p-4 shadow-md hover:shadow-lg transition-shadow">
          <div className="flex items-center justify-between mb-2">
            <div className="flex items-center gap-2">
              <Image className="w-5 h-5 text-pink-700" />
              <span className="text-sm font-bold text-pink-900">With Photos</span>
            </div>
          </div>
          <div className="text-3xl font-bold text-pink-900">{stats.photoCount}</div>
          <div className="text-xs text-pink-800 mt-1 font-medium">
            {((stats.photoCount / stats.totalReviews) * 100).toFixed(0)}% have avatars
          </div>
        </div>

        {/* Total Reviews */}
        <div className="bg-gradient-to-br from-indigo-100 to-indigo-200 border-2 border-indigo-400 rounded-xl p-4 shadow-md hover:shadow-lg transition-shadow">
          <div className="flex items-center justify-between mb-2">
            <div className="flex items-center gap-2">
              <MessageSquare className="w-5 h-5 text-indigo-700" />
              <span className="text-sm font-bold text-indigo-900">Total</span>
            </div>
          </div>
          <div className="text-3xl font-bold text-indigo-900">{stats.totalReviews}</div>
          <div className="text-xs text-indigo-800 mt-1 font-medium">all time</div>
        </div>
      </div>

      {/* Rating Timeline with Rolling Average */}
      {timelineData.length > 0 && (
        <div className="bg-white border-2 border-gray-300 rounded-xl p-6 shadow-md">
          <h3 className="text-xl font-bold mb-4 text-gray-900">Rating Trend Over Time</h3>
          <ResponsiveContainer width="100%" height={300}>
            <LineChart data={timelineData}>
              <CartesianGrid strokeDasharray="3 3" stroke="#e5e7eb" />
              <XAxis
                dataKey="date"
                tick={{ fill: '#374151', fontWeight: 600 }}
                tickLine={{ stroke: '#9ca3af' }}
              />
              <YAxis
                domain={[0, 5]}
                ticks={[0, 1, 2, 3, 4, 5]}
                tick={{ fill: '#374151', fontWeight: 600 }}
                tickLine={{ stroke: '#9ca3af' }}
              />
              <Tooltip
                contentStyle={{
                  backgroundColor: '#ffffff',
                  border: '2px solid #3b82f6',
                  borderRadius: '8px',
                  fontWeight: 600
                }}
              />
              <Line
                type="monotone"
                dataKey="rating"
                stroke="#94a3b8"
                strokeWidth={2}
                name="Monthly Avg"
                dot={{ fill: '#64748b', r: 4 }}
              />
              <Line
                type="monotone"
                dataKey="rollingAvg"
                stroke="#3b82f6"
                strokeWidth={3}
                name="3-Month Rolling Avg"
                dot={{ fill: '#2563eb', r: 5 }}
              />
            </LineChart>
          </ResponsiveContainer>
        </div>
      )}

      {/* Charts Grid */}
      <div className="grid md:grid-cols-3 gap-6">
        {/* Rating Distribution - Interactive */}
        <div className="bg-white border-2 border-gray-300 rounded-xl p-6 shadow-md">
          <h3 className="text-lg font-bold mb-4 text-gray-900">
            Rating Distribution
            <span className="text-xs font-normal text-gray-500 ml-2">(click to filter)</span>
          </h3>
          <ResponsiveContainer width="100%" height={250}>
            <BarChart
              data={stats.ratingDistribution}
              onClick={(data) => {
                if (data && data.activePayload && data.activePayload[0]) {
                  const rating = data.activePayload[0].payload.rating;
                  setSelectedRatings([rating]);
                  setSelectedSentiments(['positive', 'neutral', 'negative']);
                }
              }}
              style={{ cursor: 'pointer' }}
            >
              <CartesianGrid strokeDasharray="3 3" stroke="#e5e7eb" />
              <XAxis
                dataKey="rating"
                tick={{ fill: '#374151', fontWeight: 600 }}
                tickLine={{ stroke: '#9ca3af' }}
              />
              <YAxis
                tick={{ fill: '#374151', fontWeight: 600 }}
                tickLine={{ stroke: '#9ca3af' }}
              />
              <Tooltip
                contentStyle={{
                  backgroundColor: '#ffffff',
                  border: '2px solid #3b82f6',
                  borderRadius: '8px',
                  fontWeight: 600
                }}
                content={({ active, payload }) => {
                  if (active && payload && payload.length) {
                    return (
                      <div className="bg-white border-2 border-blue-600 rounded-lg p-2 shadow-lg">
                        <p className="font-bold text-gray-900">{payload[0].payload.rating}★</p>
                        <p className="text-sm text-gray-600">{payload[0].value} reviews ({payload[0].payload.percentage.toFixed(1)}%)</p>
                        <p className="text-xs text-blue-600 mt-1">Click to filter</p>
                      </div>
                    );
                  }
                  return null;
                }}
              />
              <Bar dataKey="count" fill="#3b82f6" radius={[8, 8, 0, 0]} />
            </BarChart>
          </ResponsiveContainer>
        </div>

        {/* Sentiment Breakdown - Interactive */}
        <div className="bg-white border-2 border-gray-300 rounded-xl p-6 shadow-md">
          <h3 className="text-lg font-bold mb-4 text-gray-900">
            Sentiment Breakdown
            <span className="text-xs font-normal text-gray-500 ml-2">(click to filter)</span>
          </h3>
          <ResponsiveContainer width="100%" height={250}>
            <PieChart>
              <Pie
                data={[
                  { name: 'Positive', value: stats.sentimentBreakdown.positive, sentiment: 'positive' },
                  { name: 'Neutral', value: stats.sentimentBreakdown.neutral, sentiment: 'neutral' },
                  { name: 'Negative', value: stats.sentimentBreakdown.negative, sentiment: 'negative' },
                ]}
                cx="50%"
                cy="50%"
                labelLine={false}
                label={({ name, percent }) => `${name} ${(percent * 100).toFixed(0)}%`}
                outerRadius={80}
                fill="#8884d8"
                dataKey="value"
                style={{ fontWeight: 700, fontSize: '13px', cursor: 'pointer' }}
                onClick={(data) => {
                  if (data && data.sentiment) {
                    setSelectedSentiments([data.sentiment as 'positive' | 'neutral' | 'negative']);
                    setSelectedRatings([1, 2, 3, 4, 5]);
                  }
                }}
              >
                <Cell fill={COLORS.positive} />
                <Cell fill={COLORS.neutral} />
                <Cell fill={COLORS.negative} />
              </Pie>
              <Tooltip
                contentStyle={{
                  backgroundColor: '#ffffff',
                  border: '2px solid #3b82f6',
                  borderRadius: '8px',
                  fontWeight: 600
                }}
                content={({ active, payload }) => {
                  if (active && payload && payload.length) {
                    return (
                      <div className="bg-white border-2 border-blue-600 rounded-lg p-2 shadow-lg">
                        <p className="font-bold text-gray-900">{payload[0].name}</p>
                        <p className="text-sm text-gray-600">{payload[0].value} reviews</p>
                        <p className="text-xs text-blue-600 mt-1">Click to filter</p>
                      </div>
                    );
                  }
                  return null;
                }}
              />
            </PieChart>
          </ResponsiveContainer>
        </div>

        {/* Top Keywords */}
        <div className="bg-white border-2 border-gray-300 rounded-xl p-6 shadow-md">
          <h3 className="text-lg font-bold mb-4 text-gray-900">Top Keywords</h3>
          <ResponsiveContainer width="100%" height={250}>
            <BarChart data={stats.topKeywords} layout="vertical">
              <CartesianGrid strokeDasharray="3 3" stroke="#e5e7eb" />
              <XAxis
                type="number"
                tick={{ fill: '#374151', fontWeight: 600 }}
                tickLine={{ stroke: '#9ca3af' }}
              />
              <YAxis
                type="category"
                dataKey="word"
                width={80}
                tick={{ fill: '#374151', fontWeight: 600 }}
                tickLine={{ stroke: '#9ca3af' }}
              />
              <Tooltip
                contentStyle={{
                  backgroundColor: '#ffffff',
                  border: '2px solid #3b82f6',
                  borderRadius: '8px',
                  fontWeight: 600
                }}
              />
              <Bar dataKey="count" fill="#8b5cf6" radius={[0, 8, 8, 0]} />
            </BarChart>
          </ResponsiveContainer>
        </div>
      </div>

      {/* Reviews Table */}
      <div className="bg-white border-2 border-gray-300 rounded-xl p-6 shadow-md">
        <div className="flex items-center justify-between mb-4">
          <h3 className="text-xl font-bold text-gray-900">Review Details</h3>
          <button
            onClick={exportFilteredData}
            className="flex items-center gap-2 px-4 py-2 bg-green-600 text-white rounded-lg hover:bg-green-700 font-semibold shadow-md border-2 border-green-700"
          >
            <Download className="w-4 h-4" />
            Export Filtered Data
          </button>
        </div>

        {/* Search */}
        <div className="mb-6">
          <div className="relative">
            <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 w-5 h-5 text-gray-500" />
            <input
              type="text"
              value={globalFilter}
              onChange={e => setGlobalFilter(e.target.value)}
              placeholder="Search by author, review text, or date..."
              className="w-full pl-10 pr-4 py-3 border-2 border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 font-medium"
            />
          </div>
        </div>

        {/* Table */}
        <div className="overflow-x-auto border-2 border-gray-300 rounded-lg">
          <table className="w-full">
            <thead className="bg-gray-100 border-b-2 border-gray-300">
              {table.getHeaderGroups().map(headerGroup => (
                <tr key={headerGroup.id}>
                  {headerGroup.headers.map(header => (
                    <th key={header.id} className="px-6 py-4 text-left text-gray-900">
                      {header.isPlaceholder
                        ? null
                        : flexRender(header.column.columnDef.header, header.getContext())}
                    </th>
                  ))}
                </tr>
              ))}
            </thead>
            <tbody className="divide-y-2 divide-gray-200">
              {table.getRowModel().rows.map(row => (
                <tr key={row.id} className="hover:bg-gray-50">
                  {row.getVisibleCells().map(cell => (
                    <td key={cell.id} className="px-6 py-4">
                      {flexRender(cell.column.columnDef.cell, cell.getContext())}
                    </td>
                  ))}
                </tr>
              ))}
            </tbody>
          </table>
        </div>

        {/* Pagination */}
        <div className="flex items-center justify-between mt-6">
          <div className="text-sm text-gray-700 font-medium">
            Showing {table.getState().pagination.pageIndex * table.getState().pagination.pageSize + 1} to{' '}
            {Math.min((table.getState().pagination.pageIndex + 1) * table.getState().pagination.pageSize, filteredReviews.length)} of{' '}
            {filteredReviews.length} reviews
          </div>
          <div className="flex gap-2">
            <button
              onClick={() => table.previousPage()}
              disabled={!table.getCanPreviousPage()}
              className="px-4 py-2 border-2 border-gray-300 rounded-lg disabled:opacity-50 disabled:cursor-not-allowed hover:bg-gray-50 font-semibold text-gray-900"
            >
              Previous
            </button>
            <button
              onClick={() => table.nextPage()}
              disabled={!table.getCanNextPage()}
              className="px-4 py-2 border-2 border-gray-300 rounded-lg disabled:opacity-50 disabled:cursor-not-allowed hover:bg-gray-50 font-semibold text-gray-900"
            >
              Next
            </button>
          </div>
        </div>
      </div>
    </div>
  );
}