"use client";

import React, { useState, useEffect } from "react";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/common/card";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/common/tabs";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/common/select";
import { Button } from "@/components/common/button";
import {
  AlertCircle,
  BarChart,
  RefreshCw,
  Users,
  ShoppingCart,
  TrendingUp,
  TrendingDown,
  DollarSign,
  Package,
  Trophy,
  PieChart as PieChartIcon,
  Zap,
} from "lucide-react";
import { Alert, AlertDescription, AlertTitle } from "@/components/common/alert";
import { fetchClient } from "@/lib/api/api-client";
import {
  BarChart as RechartsBarChart,
  Bar,
  XAxis,
  YAxis,
  CartesianGrid,
  Tooltip,
  ResponsiveContainer,
  LineChart,
  Line,
  ComposedChart,
  AreaChart,
  Area,
} from "recharts";
import { formatGBP, formatNumber, formatCurrency } from "@/lib/utils/format";
import { PieChart, Pie, Cell, Legend, Sector } from "recharts";
import { AdminStatCard } from "./AdminStatCard";
import { TrendIndicator } from "./TrendIndicator";
import {
  ChartSkeleton,
  CustomerInsightsSkeleton,
  MetricsCardSkeleton,
  TableSkeleton
} from "../analytics/SkeletonLoaders";

// Format currency for admin analytics
const formatAdminCurrency = (value: number) => {
  return new Intl.NumberFormat("en-GB", {
    style: "currency",
    currency: "GBP",
    maximumFractionDigits: 0,
  }).format(value);
};

const renderActiveShape = (props: any) => {
  const RADIAN = Math.PI / 180;
  const {
    cx,
    cy,
    midAngle,
    innerRadius,
    outerRadius,
    startAngle,
    endAngle,
    fill,
    payload,
    percent,
    value,
  } = props;
  const sin = Math.sin(-RADIAN * midAngle);
  const cos = Math.cos(-RADIAN * midAngle);
  const sx = cx + (outerRadius + 10) * cos;
  const sy = cy + (outerRadius + 10) * sin;
  const mx = cx + (outerRadius + 30) * cos;
  const my = cy + (outerRadius + 30) * sin;
  const ex = mx + (cos >= 0 ? 1 : -1) * 22;
  const ey = my;
  const textAnchor = cos >= 0 ? "start" : "end";

  return (
    <g>
      <text x={cx} y={cy} dy={8} textAnchor="middle" fill={fill} className="text-xl font-bold">
        {payload.name ? payload.name.split(" ")[0] : "Product"}
      </text>
      <Sector
        cx={cx}
        cy={cy}
        innerRadius={innerRadius}
        outerRadius={outerRadius + 6}
        startAngle={startAngle}
        endAngle={endAngle}
        fill={fill}
      />
      <Sector
        cx={cx}
        cy={cy}
        startAngle={startAngle}
        endAngle={endAngle}
        innerRadius={outerRadius + 6}
        outerRadius={outerRadius + 10}
        fill={fill}
      />
      <path
        d={`M${sx},${sy}L${mx},${my}L${ex},${ey}`}
        stroke={fill}
        fill="none"
      />
      <circle cx={ex} cy={ey} r={2} fill={fill} stroke="none" />
      <text
        x={ex + (cos >= 0 ? 1 : -1) * 12}
        y={ey}
        textAnchor={textAnchor}
        fill="#888"
        fontSize={12}
      >{`Count ${value}`}</text>
      <text
        x={ex + (cos >= 0 ? 1 : -1) * 12}
        y={ey}
        dy={18}
        textAnchor={textAnchor}
        fill="#999"
        fontSize={10}
      >
        {`(${(percent * 100).toFixed(0)}%)`}
      </text>
    </g>
  );
};

const getSmartInsights = (data?: AnalyticsData | null, growth?: GrowthData | null) => {
  const insights: Array<{
    type: 'positive' | 'neutral' | 'information';
    message: string;
    icon: any;
    color: string;
    bg: string;
  }> = [];

  if (!data) return insights;

  // 1. AI Forecast (Always high priority if available)
  if (data.predictions && data.predictions.predicted > 0) {
    insights.push({
      type: 'positive',
      message: `AI Forecast: Projected ${formatAdminCurrency(data.predictions.predicted)} revenue over the next 7 days.`,
      icon: Zap,
      color: 'text-purple-500',
      bg: 'bg-purple-500/10'
    });
  }

  // 2. Comprehensive Comparisons Data
  if (data.comparisons) {
    const rawInsights: Array<{
      score: number; // Importance score
      type: 'positive' | 'neutral' | 'information';
      message: string;
      icon: any;
      color: string;
      bg: string;
    }> = [];

    const periods = Object.entries(data.comparisons);

    periods.forEach(([label, metrics]) => {
      const timeframeName = label === '1w' ? 'last week' :
        label === '2w' ? 'last 2 weeks' :
          label === '1m' ? 'last month' :
            label === '3m' ? 'last 3 months' :
              label === '6m' ? 'last 6 months' :
                label === '1y' ? 'last year' : 'last 6 months';

      // --- Revenue Insight ---
      if (metrics.revenue.previous > 0) {
        const revDiff = metrics.revenue.current - metrics.revenue.previous;
        const revPercent = (revDiff / metrics.revenue.previous) * 100;

        if (Math.abs(revPercent) > 5) {
          rawInsights.push({
            score: Math.abs(revPercent) * (label === '1w' ? 1.5 : 1), // Weight recent changes higher
            type: revPercent > 0 ? 'positive' : 'neutral',
            message: `Revenue is ${revPercent > 0 ? 'up' : 'down'} ${Math.abs(revPercent).toFixed(1)}% vs ${timeframeName} (${formatAdminCurrency(Math.abs(revDiff))} difference).`,
            icon: revPercent > 0 ? TrendingUp : TrendingDown,
            color: revPercent > 0 ? 'text-green-500' : 'text-orange-500',
            bg: revPercent > 0 ? 'bg-green-500/10' : 'bg-orange-500/10'
          });
        }
      }

      // --- Order Volume Insight ---
      if (metrics.orders.previous > 0) {
        const ordDiff = metrics.orders.current - metrics.orders.previous;
        const ordPercent = (ordDiff / metrics.orders.previous) * 100;

        if (Math.abs(ordPercent) > 10) {
          rawInsights.push({
            score: Math.abs(ordPercent) * 0.8,
            type: ordPercent > 0 ? 'positive' : 'neutral',
            message: `Order volume has ${ordPercent > 0 ? 'increased' : 'decreased'} by ${Math.abs(ordPercent).toFixed(0)}% compared to ${timeframeName}.`,
            icon: ShoppingCart,
            color: ordPercent > 0 ? 'text-blue-500' : 'text-slate-400',
            bg: ordPercent > 0 ? 'bg-blue-500/10' : 'bg-slate-400/10'
          });
        }
      }

      // --- New Customer Insight ---
      if (metrics.customers.previous > 0) {
        const custDiff = metrics.customers.current - metrics.customers.previous;
        const custPercent = (custDiff / metrics.customers.previous) * 100;

        if (custPercent > 5) {
          rawInsights.push({
            score: custPercent * 1.2,
            type: 'positive',
            message: `New customer acquisition is up ${custPercent.toFixed(1)}% vs ${timeframeName}.`,
            icon: Users,
            color: 'text-emerald-500',
            bg: 'bg-emerald-500/10'
          });
        }
      }
    });

    // Sort by importance (score) and pick top ones
    rawInsights.sort((a, b) => b.score - a.score);

    // Add up to 3 most interesting comparison insights
    rawInsights.slice(0, 3).forEach(ri => {
      insights.push({
        type: ri.type,
        message: ri.message,
        icon: ri.icon,
        color: ri.color,
        bg: ri.bg
      });
    });
  }

  // 3. Fallback / AI Trends if we have space
  if (insights.length < 3 && data.predictions?.features?.trends) {
    const { growthRate } = data.predictions.features.trends;
    if (growthRate > 0.05) {
      insights.push({
        type: 'positive',
        message: `AI confirms a steady growth trend of ${(growthRate * 100).toFixed(1)}% in the current market.`,
        icon: Zap,
        color: 'text-purple-500',
        bg: 'bg-purple-500/10'
      });
    }
  }

  // 4. Customer Loyalty Insight (from growth data)
  if (insights.length < 4 && growth?.customers?.segments) {
    const segments = growth.customers.segments;
    const totalActive = segments.new + segments.returning + segments.loyal + segments.vip;
    if (totalActive > 0) {
      const returningRate = (segments.returning + segments.loyal + segments.vip) / totalActive;
      if (returningRate > 0.4) {
        insights.push({
          type: 'information',
          message: `${(returningRate * 100).toFixed(0)}% of your audience consists of returning customers.`,
          icon: Trophy,
          color: 'text-amber-500',
          bg: 'bg-amber-500/10'
        });
      }
    }
  }

  // Ensure we have at least one message
  if (insights.length === 0) {
    insights.push({
      type: 'neutral',
      message: 'Dashboard data calibrated. Marketplace performance is stable.',
      icon: RefreshCw,
      color: 'text-muted-foreground',
      bg: 'bg-muted/10'
    });
  }

  return insights.slice(0, 4);
};

interface ComparisonPeriod {
  orders: { current: number; previous: number };
  revenue: { current: number; previous: number };
  customers: { current: number; previous: number };
}

interface GrowthData {
  launchDate: string;
  generatedAt: string;
  daily: Array<{
    date: string;
    orders: number;
    revenue: number;
    customers: number;
    avgOrderValue: number;
  }>;
  monthly: Array<{
    month: string;
    orders: number;
    revenue: number;
    customers: number;
    avgOrderValue: number;
    newVendors: number;
    newCustomers: number;
  }>;
  customers: {
    total: number;
    segments: {
      new: number;
      returning: number;
      loyal: number;
      vip: number;
    };
    segmentDetails: {
      [key: string]: {
        count: number;
        totalRevenue: number;
        avgOrderCount: number;
        avgSpent: number;
      };
    };
    segmentPercentages: {
      new: number;
      returning: number;
      loyal: number;
      vip: number;
    };
  };

  cumulative: {
    orders: number;
    revenue: number;
    customers: number;
    vendors: number;
    products: number;
    avgOrderValue: number;
  };
}

interface AnalyticsData {
  meta?: {
    year: number;
    currentYear: number;
    availableYears: number[];
    range: string;
    isCurrentYear: boolean;
  };
  vendors?: {
    total?: number;
    newToday?: number;
    newThisWeek?: number;
    activeToday?: number;
    active?: number;
    stores?: number;
    activeStores?: number;
    dailyGrowth?: { date: string; count: number }[];
    topVendors?: Array<{
      vendorId: string;
      vendorName: string;
      totalRevenue: number;
      orderCount: number;
    }>;
  };
  orders?: {
    total?: number;
    totalToday?: number;
    totalThisWeek?: number;
    totalPreviousWeek?: number;
    totalThisMonth?: number;
    totalLastMonth?: number;
    pending?: number;
    completed?: number;
    dailyOrders?: { date: string; count: number }[];
  };
  revenue?: {
    total?: number;
    today?: number;
    thisWeek?: number;
    previousWeek?: number;
    thisMonth?: number;
    lastMonth?: number;
    dailyRevenue?: {
      date: string;
      amount: number;
      orders?: number;
      avgOrderValue?: number;
    }[];
  };
  engagement?: {
    totalChats?: number;
    activeChats?: number;
    totalMessages?: number;
    dailyMessages?: { date: string; count: number }[];
  };
  products?: {
    total?: number;
    recent?: number;
  };
  stores?: {
    total?: number;
    active?: number;
  };
  sessions?: {
    total?: number;
    active?: number;
  };
  comparisons?: {
    [key: string]: ComparisonPeriod;
  };
  predictions?: {
    predicted: number;
    confidence: "high" | "medium" | "low";
    confidenceScore: number;
    dailyPredictions: Array<{ date: string; predicted: number; confidence: string }>;
    message?: string;
    features?: {
      trends: {
        growthRate: number;
        momentum: number;
        volatility: number;
      };
      seasonality: {
        weekly: number[];
        monthly: number[];
      };
    };
  };
}

export default function AdminAnalytics() {
  const [analyticsData, setAnalyticsData] = useState<AnalyticsData | null>(
    null,
  );
  const [loading, setLoading] = useState(true);
  const [dateRange, setDateRange] = useState("7days");
  const [selectedYear, setSelectedYear] = useState<number>(
    new Date().getFullYear(),
  );
  const [availableYears, setAvailableYears] = useState<number[]>([
    new Date().getFullYear(),
  ]);
  const [errorMessage, setErrorMessage] = useState<string | null>(null);
  const [refreshing, setRefreshing] = useState(false);
  const [showDebug, setShowDebug] = useState(false);
  const [growthData, setGrowthData] = useState<GrowthData | null>(null);
  const [growthLoading, setGrowthLoading] = useState(false);

  const insights = React.useMemo(() => getSmartInsights(analyticsData, growthData), [analyticsData, growthData]);

  const [activeIndex, setActiveIndex] = useState(0);

  const onPieEnter = (_: any, index: number) => {
    setActiveIndex(index);
  };

  const currentYear = new Date().getFullYear();

  // Segment colors for pie chart
  const SEGMENT_COLORS = {
    new: "#3b82f6", // blue
    returning: "#10b981", // green
    loyal: "#f59e0b", // amber
    vip: "#8b5cf6", // purple
  };
  const isViewingCurrentYear = selectedYear === currentYear;

  const fetchAnalyticsData = async () => {
    try {
      setLoading(true);
      setErrorMessage(null);

      // Build query params - include year if not current year
      const params = new URLSearchParams();
      params.set("range", dateRange);
      if (selectedYear !== currentYear) {
        params.set("year", selectedYear.toString());
      }

      const data = await fetchClient<AnalyticsData>(
        `/admin/analytics?${params.toString()}`,
      );
      setAnalyticsData(data);

      // Update available years from response if provided
      if (data.meta?.availableYears && data.meta.availableYears.length > 0) {
        setAvailableYears(data.meta.availableYears);
      }
    } catch (error) {
      console.error("Error fetching analytics data:", error);
      setErrorMessage("Failed to load analytics data. Please try again.");
    } finally {
      setLoading(false);
      setRefreshing(false);
    }
  };

  useEffect(() => {
    fetchAnalyticsData();
  }, [dateRange, selectedYear]);

  // Fetch growth data (cached, since launch)
  const fetchGrowthData = async (forceRefresh = false) => {
    try {
      setGrowthLoading(true);
      const url = forceRefresh ? "/admin/growth?refresh=true" : "/admin/growth";
      const data = await fetchClient<GrowthData>(url);
      setGrowthData(data);
    } catch (error) {
      console.error("Error fetching growth data:", error);
    } finally {
      setGrowthLoading(false);
    }
  };

  // Fetch growth data on mount
  useEffect(() => {
    fetchGrowthData();
  }, []);

  const handleRefresh = () => {
    setRefreshing(true);
    fetchAnalyticsData();
  };

  const handleGrowthRefresh = () => {
    fetchGrowthData(true);
  };

  if (loading && !analyticsData) {
    return (
      <div className="flex justify-center my-8">
        <div className="animate-spin h-8 w-8 border-4 border-primary border-t-transparent rounded-full"></div>
      </div>
    );
  }
  // Helper to transform data for recharts
  const transformChartData = (
    data: Array<{ date: string;[key: string]: any }>,
    valueKey: string = "count",
  ) => {
    if (!data || data.length === 0) return [];

    return data.map((item) => {
      const dateStr = item.date;

      if (!dateStr) {
        return {
          date: "Unknown",
          formattedDate: "Unknown",
          value: Number(item[valueKey]) || 0,
          [valueKey]: Number(item[valueKey]) || 0,
        };
      }

      // Parse YYYY-MM-DD format
      const parts = dateStr.split("-");
      const date =
        parts.length === 3
          ? new Date(
            parseInt(parts[0]),
            parseInt(parts[1]) - 1,
            parseInt(parts[2]),
          )
          : new Date(dateStr);

      // Format with day of week: "Mon, Nov 21"
      const dayOfWeek = date.toLocaleDateString("en-GB", { weekday: "short" });
      const monthDay = date.toLocaleDateString("en-GB", {
        month: "short",
        day: "numeric",
      });

      return {
        date: dateStr,
        formattedDate: `${dayOfWeek}, ${monthDay}`,
        value: Number(item[valueKey]) || 0,
        [valueKey]: Number(item[valueKey]) || 0,
      };
    });
  };

  // Helper to combine orders and revenue data for dual-axis chart
  const combineOrdersAndRevenue = (
    orders: Array<{ date: string; count: number }>,
    revenue: Array<{
      date: string;
      amount: number;
      orders?: number;
      avgOrderValue?: number;
    }>,
  ) => {
    if (!orders || orders.length === 0) return [];

    // Create a map of revenue and AOV by date for quick lookup
    const revenueMap = new Map<
      string,
      { amount: number; avgOrderValue: number }
    >();
    if (revenue && revenue.length > 0) {
      revenue.forEach((r) => {
        if (r.date) {
          revenueMap.set(r.date, {
            amount: r.amount || 0,
            avgOrderValue: r.avgOrderValue || 0,
          });
        }
      });
    }

    return orders.map((order) => {
      const dateStr = order.date;

      if (!dateStr) {
        return {
          date: "Unknown",
          formattedDate: "Unknown",
          orders: order.count || 0,
          revenue: 0,
          avgOrderValue: 0
        };
      }

      const parts = dateStr.split("-");
      const date =
        parts.length === 3
          ? new Date(
            parseInt(parts[0]),
            parseInt(parts[1]) - 1,
            parseInt(parts[2]),
          )
          : new Date(dateStr);

      // Format with day of week: "Mon, Nov 21"
      const dayOfWeek = date.toLocaleDateString("en-GB", { weekday: "short" });
      const monthDay = date.toLocaleDateString("en-GB", {
        month: "short",
        day: "numeric",
      });

      const revenueData = revenueMap.get(dateStr) || {
        amount: 0,
        avgOrderValue: 0,
      };

      return {
        date: dateStr,
        formattedDate: `${dayOfWeek}, ${monthDay}`,
        orders: order.count || 0,
        revenue: revenueData.amount,
        avgOrderValue: revenueData.avgOrderValue,
      };
    });
  };


  // Custom tooltip for charts
  const CustomTooltip = ({ active, payload, label }: any) => {
    if (active && payload && payload.length) {
      const data = payload[0].payload;
      const dataKey = payload[0].dataKey;
      const isDualAxis =
        data.orders !== undefined && data.revenue !== undefined;

      // Determine if this is a currency amount or a count
      // transformChartData creates both 'value' and the original key (count/amount)
      // So we check the original key to determine the type
      const isAmount =
        dataKey === "amount" ||
        dataKey === "revenue" ||
        (dataKey === "value" &&
          data.amount !== undefined &&
          data.count === undefined);

      return (
        <div className="bg-[#050505]/90 p-4 rounded-xl shadow-xl border border-white/10 backdrop-blur-md ring-1 ring-white/5">
          <p className="font-bold text-[10px] uppercase tracking-wide text-muted-foreground mb-3 border-b border-white/5 pb-2">
            {data.formattedDate || label}
          </p>
          {isDualAxis ? (
            <div className="space-y-2">
              <div className="flex items-center justify-between gap-8">
                <span className="text-[11px] font-semibold text-blue-400">Orders</span>
                <span className="text-[11px] font-bold text-foreground tabular-nums">{data.orders}</span>
              </div>
              <div className="flex items-center justify-between gap-8">
                <span className="text-[11px] font-semibold text-emerald-400">Revenue</span>
                <span className="text-[11px] font-bold text-foreground tabular-nums">{formatGBP(data.revenue)}</span>
              </div>
              {data.avgOrderValue !== undefined && data.avgOrderValue > 0 && (
                <div className="flex items-center justify-between gap-8 pt-2 border-t border-white/5">
                  <span className="text-[10px] font-medium text-purple-400">Avg Order Value</span>
                  <span className="text-[10px] font-bold text-foreground tabular-nums">{formatGBP(data.avgOrderValue)}</span>
                </div>
              )}
            </div>
          ) : (
            <div className="flex items-center justify-between gap-8">
              <span className={`text-[11px] font-semibold ${isAmount ? "text-emerald-400" : "text-blue-400"}`}>
                {isAmount ? "Revenue" : "Count"}
              </span>
              <span className="text-[11px] font-bold text-foreground tabular-nums">
                {isAmount
                  ? formatGBP(data.value || data.amount || 0)
                  : `${data.value || data.count || 0}`}
              </span>
            </div>
          )}
        </div>
      );
    }
    return null;
  };





  // Calculate best month from daily data (for YTD, full year, or previous years)
  const calculateBestMonth = (): { month: string; revenue: number; orders: number } | null => {
    // Show best month for YTD, full year view, or when viewing previous years
    const showBestMonth =
      dateRange === "ytd" || dateRange === "year" || !isViewingCurrentYear;

    if (
      !showBestMonth ||
      !analyticsData?.revenue?.dailyRevenue ||
      analyticsData.revenue.dailyRevenue.length === 0
    ) {
      return null;
    }

    // Group daily revenue by month
    const monthlyTotals = new Map<
      string,
      { revenue: number; orders: number }
    >();

    analyticsData.revenue.dailyRevenue.forEach((day) => {
      const date = new Date(day.date);
      const monthKey = `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, "0")}`;
      const current = monthlyTotals.get(monthKey) || { revenue: 0, orders: 0 };
      monthlyTotals.set(monthKey, {
        revenue: current.revenue + (day.amount || 0),
        orders: current.orders,
      });
    });

    // Also group orders by month
    if (analyticsData.orders?.dailyOrders) {
      analyticsData.orders.dailyOrders.forEach((day) => {
        const date = new Date(day.date);
        const monthKey = `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, "0")}`;
        const current = monthlyTotals.get(monthKey) || {
          revenue: 0,
          orders: 0,
        };
        monthlyTotals.set(monthKey, {
          revenue: current.revenue,
          orders: current.orders + (day.count || 0),
        });
      });
    }

    // Find the month with highest revenue
    let bestMonth: { month: string; revenue: number; orders: number } | null =
      null;
    monthlyTotals.forEach((totals, monthKey) => {
      if (!bestMonth || totals.revenue > bestMonth.revenue) {
        const [year, month] = monthKey.split("-");
        const monthName = new Date(
          parseInt(year),
          parseInt(month) - 1,
          1,
        ).toLocaleDateString("en-GB", { month: "long", year: "numeric" });
        bestMonth = {
          month: monthName,
          revenue: totals.revenue,
          orders: totals.orders,
        };
      }
    });

    return bestMonth;
  };

  const bestMonth = calculateBestMonth();

  return (
    <div className="space-y-8 animate-in fade-in duration-500">
      {errorMessage && (
        <Alert variant="destructive" className="animate-in slide-in-from-top-2 border-destructive/50 bg-destructive/10 text-destructive">
          <AlertCircle className="h-4 w-4" />
          <AlertTitle>Error</AlertTitle>
          <AlertDescription>{errorMessage}</AlertDescription>
        </Alert>
      )}

      <div className="flex flex-col md:flex-row md:items-center justify-between gap-4">
        <div>
          <h2 className="text-3xl font-bold tracking-tight bg-gradient-to-r from-foreground to-foreground/70 bg-clip-text text-transparent">
            Dashboard Analytics
            {!isViewingCurrentYear && (
              <span className="ml-2 text-xl font-normal text-muted-foreground/60">
                ({selectedYear})
              </span>
            )}
          </h2>
          <p className="text-muted-foreground mt-1">
            {isViewingCurrentYear
              ? "Overview of your marketplace performance"
              : `Historical data for ${selectedYear}`}
          </p>
        </div>

        <div className="flex items-center gap-2 bg-background/40 p-1 rounded-lg border border-border/40 backdrop-blur-md">
          {/* Year selector */}
          <Select
            value={selectedYear.toString()}
            onValueChange={(value) => setSelectedYear(parseInt(value, 10))}
          >
            <SelectTrigger className="w-[100px] border-0 bg-transparent focus:ring-0">
              <SelectValue placeholder="Year" />
            </SelectTrigger>
            <SelectContent>
              {availableYears.map((year) => (
                <SelectItem key={year} value={year.toString()}>
                  {year}
                </SelectItem>
              ))}
            </SelectContent>
          </Select>

          <div className="h-4 w-px bg-border/40" />

          {/* Date range selector - only show options for current year */}
          <Select
            value={isViewingCurrentYear ? dateRange : "year"}
            onValueChange={setDateRange}
            disabled={!isViewingCurrentYear}
          >
            <SelectTrigger className="w-[140px] border-0 bg-transparent focus:ring-0">
              <SelectValue placeholder="Last 7 days" />
            </SelectTrigger>
            <SelectContent>
              {isViewingCurrentYear ? (
                <>
                  <SelectItem value="24hours">Last 24 hours</SelectItem>
                  <SelectItem value="7days">Last 7 days</SelectItem>
                  <SelectItem value="30days">Last 30 days</SelectItem>
                  <SelectItem value="90days">Last 90 days</SelectItem>
                  <SelectItem value="180days">Last 180 days</SelectItem>
                  <SelectItem value="ytd">Year to Date</SelectItem>
                  <SelectItem value="year">Full Year</SelectItem>
                </>
              ) : (
                <SelectItem value="year">Full Year</SelectItem>
              )}
            </SelectContent>
          </Select>

          <div className="h-4 w-px bg-border/40" />

          <Button
            variant="ghost"
            size="icon"
            onClick={handleRefresh}
            disabled={refreshing}
            className="h-8 w-8 hover:bg-background/60"
          >
            <RefreshCw
              className={`h-4 w-4 ${refreshing ? "animate-spin" : ""}`}
            />
          </Button>

          <Button
            variant="ghost"
            size="sm"
            onClick={() => setShowDebug(!showDebug)}
            className="px-2 text-xs hover:bg-background/60"
          >
            {showDebug ? "Hide" : "Show"} Debug
          </Button>
        </div>
      </div>

      {showDebug && analyticsData && (
        <Card className="mt-4 border-yellow-500/20 bg-yellow-500/5 backdrop-blur-sm">
          <CardHeader>
            <CardTitle className="text-yellow-600">Debug: Raw Data</CardTitle>
            <CardDescription>Date Range: {dateRange}</CardDescription>
          </CardHeader>
          <CardContent>
            <div className="space-y-4 text-xs font-mono">
              <div>
                <div className="font-semibold mb-2">Orders:</div>
                <div className="pl-4 space-y-1">
                  <div>Total: {analyticsData?.orders?.total || "N/A"}</div>
                  <div>Today: {analyticsData?.orders?.totalToday || "N/A"}</div>
                  <div>
                    Daily Orders Array Length:{" "}
                    {analyticsData?.orders?.dailyOrders?.length || 0}
                  </div>
                  {/* ... Existing Debug details kept for brevity ... */}
                  <div>First 3 Daily Orders:</div>
                  <pre className="pl-4 bg-muted/50 p-2 rounded overflow-auto max-h-32">
                    {JSON.stringify(
                      analyticsData?.orders?.dailyOrders?.slice(0, 3),
                      null,
                      2,
                    )}
                  </pre>
                </div>
              </div>
              {/* Simplified debug view for code brevity in replacement, focusing on style changes */}
              <details className="mt-4">
                <summary className="font-semibold cursor-pointer hover:text-primary transition-colors">
                  Full JSON Response
                </summary>
                <pre className="mt-2 bg-muted/50 p-4 rounded overflow-auto max-h-96 text-[10px] backdrop-blur-sm">
                  {JSON.stringify(analyticsData, null, 2)}
                </pre>
              </details>
            </div>
          </CardContent>
        </Card>
      )}

      {/* Best Month Card (show for YTD, full year, or previous years) */}
      {/* Best Month Card (show for YTD, full year, or previous years) */}
      {bestMonth && (
        <Card className="border-green-500/20 bg-green-500/5 backdrop-blur-sm overflow-hidden relative">
          <div className="absolute inset-0 bg-gradient-to-r from-green-500/10 to-transparent opacity-50" />
          <CardContent className="pt-6 relative">
            <div className="flex items-center justify-between">
              <div className="flex items-center gap-4">
                <div className="p-3 rounded-full bg-green-500/20 border border-green-500/20 shadow-[0_0_15px_rgba(34,197,94,0.2)]">
                  <Trophy className="h-6 w-6 text-green-600" />
                </div>
                <div>
                  <div className="text-sm font-medium text-muted-foreground">
                    Best Month{" "}
                    {!isViewingCurrentYear
                      ? `of ${selectedYear}`
                      : dateRange === "year"
                        ? "(Full Year)"
                        : "(YTD)"}
                  </div>
                  <div className="text-2xl font-bold text-green-600 mt-1">
                    {bestMonth.month}
                  </div>
                </div>
              </div>
              <div className="text-right">
                <div className="text-sm font-medium text-muted-foreground">
                  Revenue
                </div>
                <div className="text-2xl font-bold bg-gradient-to-r from-green-600 to-green-400 bg-clip-text text-transparent">
                  {formatAdminCurrency(bestMonth.revenue)}
                </div>
                <div className="text-sm text-muted-foreground mt-1">
                  {formatNumber(bestMonth.orders)} orders
                </div>
              </div>
            </div>
          </CardContent>
        </Card>
      )}

      <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4">
        {/* Orders Card */}
        <AdminStatCard
          title="Total Orders"
          icon={ShoppingCart}
          iconColorClass="text-blue-500"
          iconBgClass="bg-blue-500/10"
          value={formatNumber(analyticsData?.orders?.total)}
          subtext={
            <span className="bg-muted/50 px-1.5 py-0.5 rounded">
              Today: {analyticsData?.orders?.totalToday || 0}
            </span>
          }
          trend={{
            current: analyticsData?.orders?.totalToday || 0,
            previous: (analyticsData?.orders?.total || 0) / 30, // Approx simple moving average
          }}
          loading={loading || refreshing}
          chartData={transformChartData(
            analyticsData?.orders?.dailyOrders || [],
            "count"
          )}
          chartColor="#3b82f6"
          chartGradientId="colorOrdersStat"
        />

        {/* Revenue Card */}
        <AdminStatCard
          title="Total Revenue"
          icon={DollarSign}
          iconColorClass="text-green-500"
          iconBgClass="bg-green-500/10"
          value={formatAdminCurrency(analyticsData?.revenue?.total || 0)}
          subtext={
            <span className="bg-muted/50 px-1.5 py-0.5 rounded">
              Today: {formatAdminCurrency(analyticsData?.revenue?.today || 0)}
            </span>
          }
          trend={{
            current: analyticsData?.revenue?.today || 0,
            previous: (analyticsData?.revenue?.total || 0) / 30,
          }}
          loading={loading || refreshing}
          chartData={transformChartData(
            analyticsData?.revenue?.dailyRevenue || [],
            "amount"
          )}
          chartColor="#10b981"
          chartGradientId="colorRevenueStat"
          tooltipPrefix="£"
        />

        {/* Vendors Card */}
        <AdminStatCard
          title="Vendors"
          icon={Users}
          iconColorClass="text-purple-500"
          iconBgClass="bg-purple-500/10"
          value={analyticsData?.vendors?.total?.toLocaleString() || "0"}
          subtext={<span>New: {analyticsData?.vendors?.newToday || 0}</span>}
          trend={{
            current: analyticsData?.vendors?.newToday || 0,
            previous: (analyticsData?.vendors?.newThisWeek || 0) / 7,
          }}
          loading={loading || refreshing}
          chartData={transformChartData(
            analyticsData?.vendors?.dailyGrowth || [],
            "count"
          )}
          chartColor="#8b5cf6"
          chartGradientId="colorVendorsStat"
        >
          <div className="flex items-center text-xs text-muted-foreground gap-2">
            <span className="bg-muted/50 px-1.5 py-0.5 rounded">
              Active: {analyticsData?.vendors?.active || 0}
            </span>
            <span className="bg-muted/50 px-1.5 py-0.5 rounded">
              Stores: {analyticsData?.vendors?.activeStores || 0}
            </span>
          </div>
        </AdminStatCard>

        {/* Products Card */}
        <AdminStatCard
          title="Products"
          icon={Package}
          iconColorClass="text-amber-500"
          iconBgClass="bg-amber-500/10"
          value={formatNumber(analyticsData?.products?.total)}
          loading={loading || refreshing}
          chartColor="#f59e0b"
          chartGradientId="colorProductsStat"
          hideChart={true}
        />
      </div>

      {/* AI Performance Insights */}
      {insights.length > 0 && !loading && !refreshing && (
        <div className="mt-8 grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4">
          {insights.map((insight, index) => (
            <Card key={index} className="border-border/40 bg-background/50 backdrop-blur-sm shadow-sm hover:bg-background/80 transition-all duration-300">
              <CardContent className="p-4 flex items-start gap-4">
                <div className={`p-2 rounded-lg ${insight.bg} shrink-0`}>
                  <insight.icon className={`h-5 w-5 ${insight.color}`} />
                </div>
                <div>
                  <h4 className="font-semibold text-sm mb-1 flex items-center gap-2">
                    Insight
                    {insight.type === 'positive' && <span className="flex h-2 w-2 rounded-full bg-green-500 animate-pulse" />}
                  </h4>
                  <p className="text-sm text-muted-foreground leading-snug">
                    {insight.message}
                  </p>
                </div>
              </CardContent>
            </Card>
          ))}
        </div>
      )}

      <Tabs defaultValue="orders" className="mt-8">
        <TabsList className="bg-background/40 backdrop-blur-md border border-border/40 p-1 w-full sm:w-auto h-auto grid grid-cols-3 sm:flex">
          <TabsTrigger
            value="orders"
            className="data-[state=active]:bg-background/60 data-[state=active]:shadow-sm data-[state=active]:text-primary transition-all duration-300"
          >
            Orders
          </TabsTrigger>
          <TabsTrigger
            value="vendors"
            className="data-[state=active]:bg-background/60 data-[state=active]:shadow-sm data-[state=active]:text-primary transition-all duration-300"
          >
            Vendors
          </TabsTrigger>
          <TabsTrigger
            value="growth"
            className="data-[state=active]:bg-background/60 data-[state=active]:shadow-sm data-[state=active]:text-primary transition-all duration-300"
          >
            Growth Since Launch
          </TabsTrigger>
        </TabsList>

        <TabsContent value="orders" className="mt-4 animate-in fade-in slide-in-from-bottom-2 duration-500">
          {loading || refreshing ? (
            <ChartSkeleton
              title="Order Trends"
              description="Daily order volume and revenue processed over the selected time period"
              icon={BarChart}
              showStats={true}
            />
          ) : (
            <Card className="border-border/40 bg-background/50 backdrop-blur-sm shadow-sm overflow-hidden">
              <CardHeader>
                <CardTitle className="w-fit">
                  Order Trends
                </CardTitle>
                <CardDescription>
                  Daily order volume and revenue processed over the selected time
                  period
                </CardDescription>
              </CardHeader>
              <CardContent>
                {analyticsData?.orders?.dailyOrders &&
                  analyticsData.orders.dailyOrders.length > 0 ? (
                  <div className="h-80">
                    <ResponsiveContainer width="100%" height="100%">
                      <ComposedChart
                        data={combineOrdersAndRevenue(
                          analyticsData.orders.dailyOrders,
                          analyticsData.revenue?.dailyRevenue || [],
                        )}
                        margin={{ top: 5, right: 30, left: 20, bottom: 5 }}
                      >
                        <defs>
                          <linearGradient id="colorOrdersTrends" x1="0" y1="0" x2="0" y2="1">
                            <stop offset="5%" stopColor="#3b82f6" stopOpacity={0.3} />
                            <stop offset="95%" stopColor="#3b82f6" stopOpacity={0} />
                          </linearGradient>
                          <linearGradient id="colorRevenueTrends" x1="0" y1="0" x2="0" y2="1">
                            <stop offset="5%" stopColor="#10b981" stopOpacity={0.3} />
                            <stop offset="95%" stopColor="#10b981" stopOpacity={0} />
                          </linearGradient>
                        </defs>
                        <CartesianGrid strokeDasharray="3 3" vertical={false} stroke="hsl(var(--border))" opacity={0.4} />
                        <XAxis
                          dataKey="formattedDate"
                          tick={{ fontSize: 12, fill: 'hsl(var(--muted-foreground))' }}
                          angle={-45}
                          textAnchor="end"
                          height={60}
                          axisLine={false}
                          tickLine={false}
                        />
                        <YAxis
                          yAxisId="left"
                          tick={{ fontSize: 12, fill: 'hsl(var(--muted-foreground))' }}
                          axisLine={false}
                          tickLine={false}
                          label={{
                            value: "Orders",
                            angle: -90,
                            position: "insideLeft",
                            style: { fill: 'hsl(var(--muted-foreground))' }
                          }}
                        />
                        <YAxis
                          yAxisId="right"
                          orientation="right"
                          tick={{ fontSize: 12, fill: 'hsl(var(--muted-foreground))' }}
                          axisLine={false}
                          tickLine={false}
                          tickFormatter={(value) =>
                            `£${(value / 1000).toFixed(0)}k`
                          }
                          label={{
                            value: "Revenue",
                            angle: 90,
                            position: "insideRight",
                            style: { fill: 'hsl(var(--muted-foreground))' }
                          }}
                        />
                        <Tooltip content={<CustomTooltip />} cursor={{ stroke: 'rgba(255,255,255,0.1)', strokeWidth: 1 }} />
                        <Area
                          yAxisId="left"
                          type="monotone"
                          dataKey="orders"
                          stroke="#3b82f6"
                          fill="url(#colorOrdersTrends)"
                          strokeWidth={2}
                          name="Orders"
                          activeDot={{ r: 4, strokeWidth: 0, fill: "#3b82f6" }}
                        />
                        <Area
                          yAxisId="right"
                          type="monotone"
                          dataKey="revenue"
                          stroke="#10b981"
                          fill="url(#colorRevenueTrends)"
                          strokeWidth={2}
                          name="Revenue"
                          activeDot={{ r: 4, strokeWidth: 0, fill: "#10b981" }}
                        />
                      </ComposedChart>
                    </ResponsiveContainer>
                  </div>
                ) : (
                  <div className="flex items-center justify-center h-[300px] text-muted-foreground">
                    No order data available for the selected time period
                  </div>
                )}

                {/* Calculate totals for the selected period */}
                {analyticsData?.orders?.dailyOrders &&
                  analyticsData?.revenue?.dailyRevenue && (
                    <div className="grid grid-cols-1 md:grid-cols-2 gap-4 mt-6">
                      <div className="bg-muted/50 p-4 rounded-lg">
                        <div className="text-sm font-medium mb-1">
                          Total Revenue
                        </div>
                        <div className="text-2xl font-bold text-green-600">
                          {formatAdminCurrency(
                            analyticsData.revenue.dailyRevenue.reduce(
                              (sum, day) => sum + (day.amount || 0),
                              0,
                            ),
                          )}
                        </div>
                      </div>
                      <div className="bg-muted/50 p-4 rounded-lg">
                        <div className="text-sm font-medium mb-1">
                          Total Orders
                        </div>
                        <div className="text-2xl font-bold text-blue-600">
                          {analyticsData.orders.dailyOrders
                            .reduce((sum, day) => sum + (day.count || 0), 0)
                            .toLocaleString()}
                        </div>
                      </div>
                    </div>
                  )}
              </CardContent>
            </Card>
          )}
        </TabsContent>

        <TabsContent value="vendors" className="mt-4 animate-in fade-in slide-in-from-bottom-2 duration-500">
          {loading || refreshing ? (
            <ChartSkeleton
              title="Vendor Growth"
              description="New vendor registrations over time"
              icon={Users}
              showStats={true}
            />
          ) : (
            <Card className="border-border/40 bg-background/50 backdrop-blur-sm shadow-sm overflow-hidden">
              <CardHeader>
                <CardTitle className="w-fit">
                  Vendor Growth
                </CardTitle>
                <CardDescription>New vendor registrations over time</CardDescription>
              </CardHeader>
              <CardContent>
                {analyticsData?.vendors?.dailyGrowth &&
                  analyticsData.vendors.dailyGrowth.length > 0 ? (
                  <div className="h-80">
                    <ResponsiveContainer width="100%" height="100%">
                      <AreaChart
                        data={transformChartData(
                          analyticsData.vendors.dailyGrowth,
                          "count",
                        )}
                        margin={{ top: 5, right: 30, left: 20, bottom: 5 }}
                      >
                        <defs>
                          <linearGradient
                            id="colorVendorsAdminChart"
                            x1="0"
                            y1="0"
                            x2="0"
                            y2="1"
                          >
                            <stop
                              offset="5%"
                              stopColor="#8b5cf6"
                              stopOpacity={0.3}
                            />
                            <stop
                              offset="95%"
                              stopColor="#8b5cf6"
                              stopOpacity={0}
                            />
                          </linearGradient>
                        </defs>
                        <Area
                          type="monotone"
                          dataKey="value"
                          stroke="#8b5cf6"
                          fillOpacity={1}
                          fill="url(#colorVendorsAdminChart)"
                          strokeWidth={2}
                          activeDot={{ r: 4, strokeWidth: 0, fill: "#8b5cf6" }}
                        />
                        <CartesianGrid strokeDasharray="3 3" />
                        <XAxis
                          dataKey="formattedDate"
                          tick={{ fontSize: 12 }}
                          angle={-45}
                          textAnchor="end"
                          height={60}
                        />
                        <YAxis tick={{ fontSize: 12 }} />
                        <Tooltip content={<CustomTooltip />} />
                      </AreaChart>
                    </ResponsiveContainer>
                  </div>
                ) : (
                  <div className="flex items-center justify-center h-[300px] text-muted-foreground">
                    No vendor data available for the selected time period
                  </div>
                )}

                <div className="grid grid-cols-1 md:grid-cols-4 gap-4 mt-6">
                  <div className="bg-muted/50 p-4 rounded-lg">
                    <div className="text-sm font-medium mb-1">Total Vendors</div>
                    <div className="text-2xl font-bold">
                      {formatNumber(analyticsData?.vendors?.total)}
                    </div>
                  </div>
                  <div className="bg-muted/50 p-4 rounded-lg">
                    <div className="text-sm font-medium mb-1">Active Vendors</div>
                    <div className="text-2xl font-bold">
                      {formatNumber(analyticsData?.vendors?.active)}
                    </div>
                  </div>
                  <div className="bg-muted/50 p-4 rounded-lg">
                    <div className="text-sm font-medium mb-1">Active Stores</div>
                    <div className="text-2xl font-bold">
                      {formatNumber(analyticsData?.vendors?.activeStores)}
                    </div>
                  </div>
                  <div className="bg-muted/50 p-4 rounded-lg">
                    <div className="text-sm font-medium mb-1">New This Week</div>
                    <div className="text-2xl font-bold">
                      {formatNumber(analyticsData?.vendors?.newThisWeek)}
                    </div>
                  </div>
                </div>

                {/* Top Vendors by Revenue */}
                {analyticsData?.vendors?.topVendors &&
                  analyticsData.vendors.topVendors.length > 0 && (
                    <div className="mt-6">
                      <h3 className="text-lg font-semibold mb-4">
                        Top Vendors by Revenue
                      </h3>
                      <div className="space-y-2">
                        {analyticsData.vendors.topVendors.map((vendor, index) => (
                          <div
                            key={vendor.vendorId}
                            className="flex items-center justify-between p-3 bg-muted/30 rounded-lg"
                          >
                            <div className="flex items-center gap-3">
                              <div className="flex items-center justify-center w-8 h-8 rounded-full bg-primary/10 text-primary font-semibold text-sm">
                                {index + 1}
                              </div>
                              <div>
                                <div className="font-medium">
                                  {vendor.vendorName}
                                </div>
                                <div className="text-xs text-muted-foreground">
                                  {vendor.orderCount} orders
                                </div>
                              </div>
                            </div>
                            <div className="text-right">
                              <div className="font-semibold text-green-600">
                                {formatAdminCurrency(vendor.totalRevenue)}
                              </div>
                            </div>
                          </div>
                        ))}
                      </div>
                    </div>
                  )}
              </CardContent>
            </Card>
          )}
        </TabsContent>

        <TabsContent value="growth" className="mt-4 space-y-6">
          {/* Growth Header */}
          <div className="flex justify-between items-center">
            <div>
              <h3 className="text-lg font-semibold">
                Platform Growth Since Launch
              </h3>
              <p className="text-sm text-muted-foreground">
                {growthData?.launchDate
                  ? `Tracking since ${new Date(growthData.launchDate).toLocaleDateString("en-GB", { month: "long", year: "numeric" })}`
                  : "February 2025"}
                {growthData?.generatedAt && (
                  <span className="ml-2">
                    • Last updated:{" "}
                    {new Date(growthData.generatedAt).toLocaleTimeString(
                      "en-GB",
                      { hour: "2-digit", minute: "2-digit" },
                    )}
                  </span>
                )}
              </p>
            </div>
            <Button
              variant="outline"
              size="sm"
              onClick={handleGrowthRefresh}
              disabled={growthLoading}
            >
              <RefreshCw
                className={`h-4 w-4 mr-2 ${growthLoading ? "animate-spin" : ""}`}
              />
              Refresh
            </Button>
          </div>

          {/* Cumulative Stats Cards */}
          {growthData?.cumulative && (
            <div className="grid grid-cols-2 lg:grid-cols-6 gap-4">
              <Card className="col-span-1 border-border/40 bg-background/50 backdrop-blur-sm hover:bg-background/60 transition-colors">
                <CardContent className="pt-4 flex flex-col items-center justify-center text-center">
                  <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-1">Total Orders</div>
                  <div className="text-2xl font-bold">{formatNumber(growthData.cumulative.orders)}</div>
                </CardContent>
              </Card>
              <Card className="col-span-1 border-green-500/20 bg-green-500/5 backdrop-blur-sm hover:bg-green-500/10 transition-colors">
                <CardContent className="pt-4 flex flex-col items-center justify-center text-center">
                  <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-1">Total Revenue</div>
                  <div className="text-2xl font-bold text-green-600">{formatAdminCurrency(growthData.cumulative.revenue)}</div>
                </CardContent>
              </Card>
              <Card className="col-span-1 border-border/40 bg-background/50 backdrop-blur-sm hover:bg-background/60 transition-colors">
                <CardContent className="pt-4 flex flex-col items-center justify-center text-center">
                  <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-1">Customers</div>
                  <div className="text-2xl font-bold">{formatNumber(growthData.cumulative.customers)}</div>
                </CardContent>
              </Card>
              <Card className="col-span-1 border-border/40 bg-background/50 backdrop-blur-sm hover:bg-background/60 transition-colors">
                <CardContent className="pt-4 flex flex-col items-center justify-center text-center">
                  <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-1">Vendors</div>
                  <div className="text-2xl font-bold">{formatNumber(growthData.cumulative.vendors)}</div>
                </CardContent>
              </Card>
              <Card className="col-span-1 border-border/40 bg-background/50 backdrop-blur-sm hover:bg-background/60 transition-colors">
                <CardContent className="pt-4 flex flex-col items-center justify-center text-center">
                  <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-1">Products</div>
                  <div className="text-2xl font-bold">{formatNumber(growthData.cumulative.products)}</div>
                </CardContent>
              </Card>
              <Card className="col-span-1 border-purple-500/20 bg-purple-500/5 backdrop-blur-sm hover:bg-purple-500/10 transition-colors">
                <CardContent className="pt-4 flex flex-col items-center justify-center text-center">
                  <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-1">Avg Order Value</div>
                  <div className="text-2xl font-bold text-purple-600">{formatAdminCurrency(growthData.cumulative.avgOrderValue)}</div>
                </CardContent>
              </Card>
            </div>
          )}

          <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
            {/* Monthly Revenue & Orders Chart */}
            <Card className="lg:col-span-2 border-border/40 bg-background/50 backdrop-blur-sm shadow-sm">
              <CardHeader>
                <CardTitle className="w-fit">Monthly Revenue & Orders</CardTitle>
                <CardDescription>
                  Platform performance by month since launch
                </CardDescription>
              </CardHeader>
              <CardContent>
                {growthLoading ? (
                  <ChartSkeleton
                    title="Monthly Revenue & Orders"
                    description="Platform performance by month since launch"
                    icon={BarChart}
                    showStats={false}
                    className="h-full border-0 shadow-none bg-transparent"
                  />
                ) : growthData?.monthly && growthData.monthly.length > 0 ? (
                  <div className="h-80">
                    <ResponsiveContainer width="100%" height="100%">
                      <ComposedChart
                        data={growthData.monthly.map((m) => ({
                          ...m,
                          formattedMonth: new Date(
                            m.month + "-01",
                          ).toLocaleDateString("en-GB", {
                            month: "short",
                            year: "2-digit",
                          }),
                        }))}
                        margin={{ top: 5, right: 30, left: 20, bottom: 5 }}
                      >
                        <defs>
                          <linearGradient id="colorGrowthOrders" x1="0" y1="0" x2="0" y2="1">
                            <stop offset="5%" stopColor="#3b82f6" stopOpacity={0.3} />
                            <stop offset="95%" stopColor="#3b82f6" stopOpacity={0} />
                          </linearGradient>
                          <linearGradient id="colorGrowthRevenue" x1="0" y1="0" x2="0" y2="1">
                            <stop offset="5%" stopColor="#10b981" stopOpacity={0.3} />
                            <stop offset="95%" stopColor="#10b981" stopOpacity={0} />
                          </linearGradient>
                        </defs>
                        <CartesianGrid strokeDasharray="3 3" vertical={false} stroke="hsl(var(--border))" opacity={0.4} />
                        <XAxis dataKey="formattedMonth" tick={{ fontSize: 12, fill: 'hsl(var(--muted-foreground))' }} axisLine={false} tickLine={false} />
                        <YAxis yAxisId="left" tick={{ fontSize: 12, fill: 'hsl(var(--muted-foreground))' }} axisLine={false} tickLine={false} label={{ value: "Orders", angle: -90, position: "insideLeft", style: { fill: 'hsl(var(--muted-foreground))' } }} />
                        <YAxis
                          yAxisId="right"
                          orientation="right"
                          tick={{ fontSize: 12, fill: 'hsl(var(--muted-foreground))' }}
                          axisLine={false} tickLine={false}
                          tickFormatter={(value) =>
                            `£${(value / 1000).toFixed(0)}k`
                          }
                          label={{ value: "Revenue", angle: 90, position: "insideRight", style: { fill: 'hsl(var(--muted-foreground))' } }}
                        />
                        <Tooltip
                          cursor={{ stroke: 'rgba(255,255,255,0.1)', strokeWidth: 1 }}
                          content={({ active, payload }) => {
                            if (active && payload?.length) {
                              const data = payload[0].payload;
                              return (
                                <div className="bg-background/95 border border-border/50 p-4 rounded-xl shadow-xl backdrop-blur-md">
                                  <p className="font-semibold mb-3 border-b border-border/50 pb-2">{data.month}</p>
                                  <div className="space-y-1.5">
                                    <div className="flex items-center justify-between gap-4">
                                      <span className="text-sm text-muted-foreground flex items-center gap-2">
                                        <div className="w-2 h-2 rounded-full bg-blue-500" /> Orders
                                      </span>
                                      <span className="font-medium">{formatNumber(data.orders)}</span>
                                    </div>
                                    <div className="flex items-center justify-between gap-4">
                                      <span className="text-sm text-muted-foreground flex items-center gap-2">
                                        <div className="w-2 h-2 rounded-full bg-green-500" /> Revenue
                                      </span>
                                      <span className="font-medium text-green-600">{formatAdminCurrency(data.revenue)}</span>
                                    </div>
                                    <div className="flex items-center justify-between gap-4">
                                      <span className="text-sm text-muted-foreground flex items-center gap-2">
                                        <div className="w-2 h-2 rounded-full bg-purple-500" /> Customers
                                      </span>
                                      <span className="font-medium">{formatNumber(data.customers)}</span>
                                    </div>
                                    <div className="flex items-center justify-between gap-4">
                                      <span className="text-sm text-muted-foreground flex items-center gap-2">
                                        <div className="w-2 h-2 rounded-full bg-amber-500" /> New Vendors
                                      </span>
                                      <span className="font-medium">{data.newVendors}</span>
                                    </div>
                                  </div>
                                </div>
                              );
                            }
                            return null;
                          }}
                        />
                        <Area
                          yAxisId="left"
                          type="monotone"
                          dataKey="orders"
                          stroke="#3b82f6"
                          fill="url(#colorGrowthOrders)"
                          strokeWidth={2}
                          name="Orders"
                          activeDot={{ r: 4, strokeWidth: 0, fill: "#3b82f6" }}
                        />
                        <Area
                          yAxisId="right"
                          type="monotone"
                          dataKey="revenue"
                          stroke="#10b981"
                          fill="url(#colorGrowthRevenue)"
                          strokeWidth={2}
                          name="Revenue"
                          activeDot={{ r: 4, strokeWidth: 0, fill: "#10b981" }}
                        />
                      </ComposedChart>
                    </ResponsiveContainer>
                  </div>
                ) : (
                  <div className="flex items-center justify-center h-80 text-muted-foreground bg-muted/20 rounded-lg border border-dashed border-border/50">
                    No growth data available
                  </div>
                )}
              </CardContent>
            </Card>

            {/* Customer Segments Pie Chart */}
            <Card className="lg:col-span-1 border-border/40 bg-background/50 backdrop-blur-sm shadow-sm h-full flex flex-col">
              <CardHeader>
                <CardTitle className="w-fit">Customer Segments</CardTitle>
                <CardDescription>By purchase behavior</CardDescription>
              </CardHeader>
              <CardContent className="flex-1 flex flex-col justify-center">
                {growthLoading ? (
                  <ChartSkeleton
                    title="Customer Segments"
                    description="By purchase behavior"
                    icon={PieChartIcon}
                    showStats={false}
                    className="h-full border-0 shadow-none bg-transparent"
                  />
                ) : growthData?.customers ? (
                  <>
                    <div className="h-64 min-w-0">
                      <ResponsiveContainer key={growthData?.customers ? 'ready' : 'loading'} width="100%" height="100%">
                        <PieChart>
                          <Pie
                            activeIndex={activeIndex}
                            activeShape={renderActiveShape}
                            data={[
                              {
                                name: "New (1 order)",
                                value: growthData.customers.segments.new,
                                color: SEGMENT_COLORS.new,
                              },
                              {
                                name: "Returning (2+)",
                                value: growthData.customers.segments.returning,
                                color: SEGMENT_COLORS.returning,
                              },
                              {
                                name: "Loyal (£300+/4+)",
                                value: growthData.customers.segments.loyal,
                                color: SEGMENT_COLORS.loyal,
                              },
                              {
                                name: "VIP (£1k+/10+)",
                                value: growthData.customers.segments.vip,
                                color: SEGMENT_COLORS.vip,
                              },
                            ]}
                            cx="50%"
                            cy="50%"
                            innerRadius={60}
                            outerRadius={80}
                            fill="#8884d8"
                            dataKey="value"
                            onMouseEnter={onPieEnter}
                          >
                            {[
                              { color: SEGMENT_COLORS.new },
                              { color: SEGMENT_COLORS.returning },
                              { color: SEGMENT_COLORS.loyal },
                              { color: SEGMENT_COLORS.vip },
                            ].map((entry, index) => (
                              <Cell key={`cell-${index}`} fill={entry.color} />
                            ))}
                          </Pie>
                        </PieChart>
                      </ResponsiveContainer>
                    </div>

                    {/* Segment Stats */}
                    <div className="grid grid-cols-2 gap-3 mt-4">
                      <div className="p-3 rounded-lg bg-blue-500/10 border border-blue-500/10 text-center hover:bg-blue-500/15 transition-colors">
                        <div className="text-xl font-bold text-blue-600">
                          {growthData.customers.segments.new}
                        </div>
                        <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider">New</div>
                      </div>
                      <div className="p-3 rounded-lg bg-green-500/10 border border-green-500/10 text-center hover:bg-green-500/15 transition-colors">
                        <div className="text-xl font-bold text-green-600">
                          {growthData.customers.segments.returning}
                        </div>
                        <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider">
                          Returning
                        </div>
                      </div>
                      <div className="p-3 rounded-lg bg-amber-500/10 border border-amber-500/10 text-center hover:bg-amber-500/15 transition-colors">
                        <div className="text-xl font-bold text-amber-600">
                          {growthData.customers.segments.loyal}
                        </div>
                        <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider">Loyal</div>
                      </div>
                      <div className="p-3 rounded-lg bg-purple-500/10 border border-purple-500/10 text-center hover:bg-purple-500/15 transition-colors">
                        <div className="text-xl font-bold text-purple-600">
                          {growthData.customers.segments.vip}
                        </div>
                        <div className="text-xs font-medium text-muted-foreground uppercase tracking-wider">VIP</div>
                      </div>
                    </div>
                  </>
                ) : (
                  <div className="flex items-center justify-center h-64 text-muted-foreground bg-muted/20 rounded-lg border border-dashed border-border/50">
                    No customer data available
                  </div>
                )}
              </CardContent>
            </Card>
          </div>

          {/* Monthly Growth Table */}
          {growthData?.monthly && growthData.monthly.length > 0 && (
            <Card className="border-border/40 bg-background/50 backdrop-blur-sm shadow-sm overflow-hidden">
              <CardHeader>
                <CardTitle className="w-fit">Monthly Breakdown</CardTitle>
                <CardDescription>Detailed metrics by month</CardDescription>
              </CardHeader>
              <CardContent>
                <div className="rounded-md border border-border/40 overflow-hidden">
                  <table className="w-full text-sm">
                    <thead>
                      <tr className="bg-muted/40 border-b border-border/40">
                        <th className="text-left p-3 font-medium text-muted-foreground">Month</th>
                        <th className="text-right p-3 font-medium text-muted-foreground">Orders</th>
                        <th className="text-right p-3 font-medium text-muted-foreground">Revenue</th>
                        <th className="text-right p-3 font-medium text-muted-foreground">
                          Customers
                        </th>
                        <th className="text-right p-3 font-medium text-muted-foreground">
                          Avg Order
                        </th>
                        <th className="text-right p-3 font-medium text-muted-foreground">
                          New Vendors
                        </th>
                        <th className="text-right p-3 font-medium text-muted-foreground">
                          New Customers
                        </th>
                      </tr>
                    </thead>
                    <tbody className="divide-y divide-border/30">
                      {growthData.monthly.map((month, i) => (
                        <tr
                          key={month.month}
                          className="hover:bg-muted/30 transition-colors animate-in fade-in slide-in-from-bottom-2 duration-500 fill-mode-backwards"
                          style={{ animationDelay: `${i * 50}ms` }}
                        >
                          <td className="p-3 font-medium">
                            {new Date(month.month + "-01").toLocaleDateString(
                              "en-GB",
                              { month: "long", year: "numeric" },
                            )}
                          </td>
                          <td className="text-right p-3">
                            <div className="inline-flex items-center px-2 py-0.5 rounded-full bg-blue-500/10 text-blue-600 text-xs font-medium">
                              {month.orders.toLocaleString()}
                            </div>
                          </td>
                          <td className="text-right p-3 text-green-600 font-semibold">
                            {formatAdminCurrency(month.revenue)}
                          </td>
                          <td className="text-right p-3 text-muted-foreground">
                            {month.customers.toLocaleString()}
                          </td>
                          <td className="text-right p-3 text-muted-foreground">
                            {formatAdminCurrency(month.avgOrderValue)}
                          </td>
                          <td className="text-right p-3 text-muted-foreground">{month.newVendors}</td>
                          <td className="text-right p-3 text-muted-foreground">
                            {month.newCustomers}
                          </td>
                        </tr>
                      ))}
                    </tbody>
                  </table>
                </div>
              </CardContent>
            </Card>
          )}
        </TabsContent>
      </Tabs>
    </div>
  );
}


