'use client';

import { AreaChart, Area, XAxis, YAxis, Tooltip, ResponsiveContainer } from 'recharts';

interface Snapshot {
  date: string;
  totalValueCny: string;
  totalCostCny: string;
}

interface NetWorthChartProps {
  snapshots: Snapshot[];
}

function CustomTooltip({ active, payload, label }: { active?: boolean; payload?: Array<{ name: string; value: string; payload: Snapshot }>; label?: string }) {
  if (active && payload && payload.length) {
    const data = payload[0].payload;
    const totalValue = parseFloat(data.totalValueCny);
    const totalCost = parseFloat(data.totalCostCny);
    const pnl = totalValue - totalCost;
    const pnlPercent = totalCost > 0 ? (pnl / totalCost) * 100 : 0;
    const isPositive = pnl >= 0;

    const formattedDate = (label || '').replace(/-/g, '/');

    return (
      <div style={{
        backgroundColor: 'hsl(var(--card))',
        borderColor: 'hsl(var(--border))',
        borderRadius: '8px',
        color: 'hsl(var(--foreground))',
        fontSize: '13px',
        padding: '12px 16px',
        boxShadow: '0 4px 12px rgba(0,0,0,0.15)',
      }}>
        <div style={{ fontWeight: '600', marginBottom: '8px', fontSize: '14px' }}>
          {formattedDate}
        </div>
        <div style={{ display: 'flex', justifyContent: 'space-between', gap: '24px', marginBottom: '4px' }}>
          <span style={{ color: 'hsl(var(--muted-foreground))', display: 'flex', alignItems: 'center', gap: '6px' }}>
            <span style={{ display: 'inline-block', width: '8px', height: '8px', borderRadius: '2px', backgroundColor: '#f59e0b' }} />
            总市值
          </span>
          <span style={{ fontWeight: '700', color: '#f59e0b' }}>
            ¥{totalValue.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
          </span>
        </div>
        <div style={{ display: 'flex', justifyContent: 'space-between', gap: '24px', marginBottom: '4px' }}>
          <span style={{ color: 'hsl(var(--muted-foreground))', display: 'flex', alignItems: 'center', gap: '6px' }}>
            <span style={{ display: 'inline-block', width: '8px', height: '8px', borderRadius: '2px', backgroundColor: '#9ca3af' }} />
            投入本金
          </span>
          <span style={{ fontWeight: '600', color: 'hsl(var(--muted-foreground))' }}>
            ¥{totalCost.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
          </span>
        </div>
        <div style={{ display: 'flex', justifyContent: 'space-between', gap: '24px', paddingTop: '6px', borderTop: '1px solid hsl(var(--border))' }}>
          <span style={{ color: 'hsl(var(--muted-foreground))', fontWeight: '500' }}>净盈亏</span>
          <span style={{
            fontWeight: '700',
            color: isPositive ? '#ef4444' : '#22c55e',
          }}>
            {isPositive ? '+' : ''}¥{pnl.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
            {' '}({isPositive ? '+' : ''}{pnlPercent.toFixed(2)}%)
          </span>
        </div>
      </div>
    );
  }
  return null;
}

export default function NetWorthChart({ snapshots }: NetWorthChartProps) {
  if (!snapshots || snapshots.length === 0) {
    return (
      <div className="flex items-center justify-center h-[320px] text-muted-foreground">
        暂无历史数据
      </div>
    );
  }

  const chartData = snapshots.map(s => ({
    date: s.date.replace(/-/g, '/'),
    totalValueCny: parseFloat(s.totalValueCny),
    totalCostCny: parseFloat(s.totalCostCny),
  }));

  return (
    <div className="h-[320px] w-full">
      <ResponsiveContainer width="100%" height="100%">
        <AreaChart data={chartData} margin={{ top: 10, right: 20, left: 10, bottom: 10 }}>
          <defs>
            <linearGradient id="totalValueGradient" x1="0" y1="0" x2="0" y2="1">
              <stop offset="0%" stopColor="#f59e0b" stopOpacity={0.3} />
              <stop offset="100%" stopColor="#f59e0b" stopOpacity={0.02} />
            </linearGradient>
            <linearGradient id="totalCostGradient" x1="0" y1="0" x2="0" y2="1">
              <stop offset="0%" stopColor="#9ca3af" stopOpacity={0.15} />
              <stop offset="100%" stopColor="#9ca3af" stopOpacity={0.02} />
            </linearGradient>
          </defs>
          <XAxis
            dataKey="date"
            tick={{ fontSize: 12, fill: 'hsl(var(--muted-foreground))' }}
            axisLine={{ stroke: 'hsl(var(--border))' }}
            tickLine={{ stroke: 'hsl(var(--border))' }}
            interval="preserveStartEnd"
          />
          <YAxis
            tick={{ fontSize: 12, fill: 'hsl(var(--muted-foreground))' }}
            axisLine={{ stroke: 'hsl(var(--border))' }}
            tickLine={{ stroke: 'hsl(var(--border))' }}
            tickFormatter={(value: number) => {
              if (value >= 1000000) return `¥${(value / 1000000).toFixed(1)}M`;
              if (value >= 1000) return `¥${(value / 1000).toFixed(0)}K`;
              return `¥${value.toFixed(0)}`;
            }}
          />
          <Tooltip content={<CustomTooltip />} />
          <Area
            type="monotone"
            dataKey="totalValueCny"
            stroke="#f59e0b"
            strokeWidth={2}
            fill="url(#totalValueGradient)"
            name="总市值"
          />
          <Area
            type="monotone"
            dataKey="totalCostCny"
            stroke="#9ca3af"
            strokeWidth={1.5}
            strokeDasharray="4 4"
            fill="url(#totalCostGradient)"
            name="投入本金"
          />
        </AreaChart>
      </ResponsiveContainer>
    </div>
  );
}