'use client';

import React, { useState } from 'react';
import { Badge } from '@/registry/default/ui/badge';
import { Card, CardContent, CardHeader, CardTitle, CardToolbar } from '@/registry/default/ui/card';
import { ChartConfig, ChartContainer, ChartTooltip } from '@/registry/default/ui/chart';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/registry/default/ui/select';
import { TrendingDown, TrendingUp } from 'lucide-react';
import { Area, CartesianGrid, ComposedChart, Line, XAxis, YAxis } from 'recharts';

// E-commerce data for different periods with balanced patterns
const salesViewsData = {
  '7d': [
    { period: 'Aug 1', sales: 850, views: 620 },
    { period: 'Aug 5', sales: 920, views: 780 },
    { period: 'Aug 7', sales: 780, views: 540 },
    { period: 'Aug 8', sales: 1240, views: 890 },
    { period: 'Aug 22', sales: 1100, views: 720 },
  ],
  '30d': [
    { period: 'Week 1', sales: 5200, views: 4800 },
    { period: 'Week 2', sales: 6400, views: 5200 },
    { period: 'Week 3', sales: 5800, views: 4600 },
    { period: 'Week 4', sales: 7200, views: 5800 },
    { period: 'Week 5', sales: 6800, views: 5400 },
    { period: 'Week 6', sales: 6200, views: 4900 },
  ],
  '90d': [
    { period: 'Jan', sales: 22000, views: 18500 },
    { period: 'Feb', sales: 24800, views: 20200 },
    { period: 'Mar', sales: 21400, views: 17800 },
    { period: 'Apr', sales: 26200, views: 21600 },
    { period: 'May', sales: 25600, views: 20800 },
    { period: 'Jun', sales: 27400, views: 22400 },
    { period: 'Jul', sales: 24800, views: 19600 },
    { period: 'Aug', sales: 23600, views: 18800 },
    { period: 'Sep', sales: 28200, views: 23200 },
  ],
  '12m': [
    { period: 'Q1 23', sales: 85000, views: 72000 },
    { period: 'Q2 23', sales: 92000, views: 78000 },
    { period: 'Q3 23', sales: 88000, views: 74000 },
    { period: 'Q4 23', sales: 98000, views: 82000 },
    { period: 'Q1 24', sales: 94000, views: 79000 },
    { period: 'Q2 24', sales: 102000, views: 86000 },
    { period: 'Q3 24', sales: 96000, views: 81000 },
    { period: 'Q4 24', sales: 108000, views: 90000 },
  ],
};

// Use custom or Tailwind standard colors: https://tailwindcss.com/docs/colors
const chartConfig = {
  sales: {
    label: 'Sales',
    color: 'var(--color-amber-500)',
  },
  views: {
    label: 'Views',
    color: 'var(--color-purple-500)',
  },
} satisfies ChartConfig;

// Custom Tooltip
interface TooltipProps {
  active?: boolean;
  payload?: Array<{
    dataKey: string;
    value: number;
    color: string;
  }>;
  label?: string;
}

const ChartLabel = ({ label, color }: { label: string; color: string }) => {
  return (
    <div className="flex items-center gap-1.5">
      <div className="w-1 h-3 rounded-full" style={{ backgroundColor: color }}></div>
      <span className="text-muted-foreground">{label}</span>
    </div>
  );
};

const CustomTooltip = ({ active, payload, label }: TooltipProps) => {
  if (active && payload && payload.length) {
    return (
      <div className="rounded-lg border bg-popover p-3 shadow-sm shadow-black/5 min-w-[150px]">
        <div className="text-xs font-medium text-muted-foreground tracking-wide mb-2.5">{label}</div>
        <div className="space-y-2">
          {payload.map((entry, index) => {
            const config = chartConfig[entry.dataKey as keyof typeof chartConfig];
            return (
              <div key={index} className="flex items-center gap-2 text-xs">
                <ChartLabel label={config?.label + ':'} color={entry.color} />
                <span className="font-semibold text-popover-foreground">
                  {entry.dataKey === 'sales'
                    ? `£${entry.value.toLocaleString()}`
                    : entry.value >= 0
                      ? `+${entry.value.toLocaleString()}`
                      : entry.value.toLocaleString()}
                </span>
              </div>
            );
          })}
        </div>
      </div>
    );
  }
  return null;
};

// Period configuration
const PERIODS = {
  '7d': { key: '7d', label: 'Last 7 days' },
  '30d': { key: '30d', label: 'Last 30 days' },
  '90d': { key: '90d', label: 'Last 90 days' },
  '12m': { key: '12m', label: 'Last 12 months' },
} as const;

type PeriodKey = keyof typeof PERIODS;

export default function LineChart5() {
  const [selectedPeriod, setSelectedPeriod] = useState<PeriodKey>('30d');

  // Get data for selected period
  const currentData = salesViewsData[selectedPeriod];

  // Calculate totals and percentages
  const totalSales = currentData.reduce((sum, item) => sum + item.sales, 0);
  const totalViews = currentData.reduce((sum, item) => sum + item.views, 0);
  // Calculate percentage changes (simulated)
  const salesChange = selectedPeriod === '7d' ? 12 : selectedPeriod === '30d' ? 8 : selectedPeriod === '90d' ? -3 : 15;
  const viewsChange = selectedPeriod === '7d' ? -3 : selectedPeriod === '30d' ? 5 : selectedPeriod === '90d' ? -8 : 12;

  return (
    <div className="min-h-screen flex items-center justify-center p-6 lg:p-8">
      <Card className="w-full max-w-3xl">
        <CardHeader className="border-0 min-h-auto pt-6 pb-4">
          <CardTitle className="text-lg font-semibold">E-commerce Sales</CardTitle>
          <CardToolbar>
            {/* Period Selector */}
            <Select value={selectedPeriod} onValueChange={(value) => setSelectedPeriod(value as PeriodKey)}>
              <SelectTrigger>
                <SelectValue />
              </SelectTrigger>
              <SelectContent align="end">
                {Object.values(PERIODS).map((period) => (
                  <SelectItem key={period.key} value={period.key}>
                    {period.label}
                  </SelectItem>
                ))}
              </SelectContent>
            </Select>
          </CardToolbar>
        </CardHeader>

        <CardContent className="px-2 pb-6">
          {/* Stats Section */}
          <div className="flex items-center flex-wrap gap-3.5 md:gap-10 px-5 mb-8 text-sm">
            <div className="flex items-center gap-3.5">
              <ChartLabel label="Sales" color={chartConfig.sales.color} />
              <div className="flex items-center gap-2">
                <span className="text-2xl font-bold">£{totalSales.toLocaleString()}</span>
                <Badge variant={salesChange >= 0 ? 'success' : 'destructive'} appearance="light">
                  {salesChange >= 0 ? <TrendingUp className="size-3" /> : <TrendingDown className="size-3" />}
                  {Math.abs(salesChange)}%
                </Badge>
              </div>
            </div>
            <div className="flex items-center gap-3.5">
              <ChartLabel label="Views" color={chartConfig.views.color} />
              <div className="flex items-center gap-2">
                <span className="text-2xl font-bold">{totalViews.toLocaleString()}</span>
                <Badge variant={salesChange <= 0 ? 'success' : 'destructive'} appearance="light">
                  {viewsChange <= 0 ? <TrendingUp className="size-3" /> : <TrendingDown className="size-3" />}
                  {Math.abs(viewsChange)}%
                </Badge>
              </div>
            </div>
          </div>

          {/* Chart */}
          <ChartContainer
            config={chartConfig}
            className="h-[300px] w-full [&_.recharts-curve.recharts-tooltip-cursor]:stroke-initial"
          >
            <ComposedChart
              data={currentData}
              margin={{
                top: 30,
                right: 5,
                left: 5,
                bottom: 10,
              }}
            >
              {/* Background pattern for chart area only */}
              <defs>
                <linearGradient id="salesGradient" x1="0" y1="0" x2="0" y2="1">
                  <stop offset="0%" stopColor={chartConfig.sales.color} stopOpacity={0.3} />
                  <stop offset="100%" stopColor={chartConfig.sales.color} stopOpacity={0.05} />
                </linearGradient>
                <linearGradient id="viewsGradient" x1="0" y1="0" x2="0" y2="1">
                  <stop offset="0%" stopColor={chartConfig.views.color} stopOpacity={0.3} />
                  <stop offset="100%" stopColor={chartConfig.views.color} stopOpacity={0.05} />
                </linearGradient>
                <filter id="glow">
                  <feGaussianBlur stdDeviation="3" result="coloredBlur" />
                  <feMerge>
                    <feMergeNode in="coloredBlur" />
                    <feMergeNode in="SourceGraphic" />
                  </feMerge>
                </filter>
              </defs>

              <CartesianGrid
                strokeDasharray="4 12"
                stroke="var(--input)"
                strokeOpacity={1}
                horizontal={true}
                vertical={false}
              />

              {/* X Axis */}
              <XAxis
                dataKey="period"
                axisLine={false}
                tickLine={false}
                tick={{ fontSize: 11, fill: 'var(--muted-foreground)' }}
                tickMargin={10}
              />

              {/* Left Y Axis for Sales */}
              <YAxis
                yAxisId="sales"
                orientation="left"
                axisLine={false}
                tickLine={false}
                tick={{ fontSize: 11, fill: 'var(--muted-foreground)' }}
                tickFormatter={(value) => (selectedPeriod === '7d' ? `£${value}` : `£${(value / 1000).toFixed(0)}k`)}
                tickMargin={10}
              />
              {/* Right Y Axis for Views */}
              <YAxis
                yAxisId="views"
                orientation="right"
                axisLine={false}
                tickLine={false}
                tick={{ fontSize: 11, fill: 'var(--muted-foreground)' }}
                tickFormatter={(value) => {
                  if (selectedPeriod === '7d') {
                    return value >= 0 ? `+${value}` : value.toString();
                  }
                  return value >= 0 ? `+${(value / 1000).toFixed(0)}k` : `${(value / 1000).toFixed(0)}k`;
                }}
                tickMargin={8}
                domain={['dataMin - 100', 'dataMax + 100']}
              />

              <ChartTooltip
                content={<CustomTooltip />}
                cursor={{ strokeDasharray: '3 3', stroke: 'var(--muted-foreground)', strokeOpacity: 0.5 }}
              />

              {/* Sales Line (Linear) */}
              <Line
                yAxisId="sales"
                type="linear"
                dataKey="sales"
                stroke={chartConfig.sales.color}
                strokeWidth={1}
                dot={false}
                activeDot={{
                  r: 5,
                  fill: chartConfig.sales.color,
                  strokeWidth: 0,
                }}
              />

              {/* Views Line (Linear Dashed) */}
              <Line
                yAxisId="views"
                type="linear"
                dataKey="views"
                stroke={chartConfig.views.color}
                strokeWidth={1}
                strokeDasharray="8 4"
                dot={false}
                activeDot={{
                  r: 5,
                  fill: chartConfig.views.color,
                  strokeWidth: 0,
                }}
              />
            </ComposedChart>
          </ChartContainer>
        </CardContent>
      </Card>
    </div>
  );
}