'use client';

import {
  LineChart,
  Line,
  XAxis,
  YAxis,
  CartesianGrid,
  Tooltip,
  ResponsiveContainer,
} from 'recharts';

import type { PriceHistoryItem } from '@/lib/listings-api';

interface PriceHistoryChartProps {
  data: PriceHistoryItem[];
  height?: number;
}

function priceToMillions(priceStr: string): number {
  return Math.round(Number(priceStr) / 1_000_000);
}

function formatMillions(value: number): string {
  if (value >= 1000) return `${(value / 1000).toFixed(1)} tỷ`;
  return `${value} tr`;
}

export function PriceHistoryChart({ data, height = 280 }: PriceHistoryChartProps) {
  if (data.length === 0) return null;

  const chartData = [...data]
    .sort((a, b) => new Date(a.changedAt).getTime() - new Date(b.changedAt).getTime())
    .map((item) => ({
      date: new Date(item.changedAt).toLocaleDateString('vi-VN', {
        day: '2-digit',
        month: '2-digit',
        year: 'numeric',
      }),
      price: priceToMillions(item.newPrice),
    }));

  return (
    <ResponsiveContainer width="100%" height={height}>
      <LineChart data={chartData} margin={{ top: 5, right: 20, left: 0, bottom: 5 }}>
        <CartesianGrid strokeDasharray="3 3" className="stroke-muted" />
        <XAxis dataKey="date" tick={{ fontSize: 11 }} className="fill-muted-foreground" />
        <YAxis
          tick={{ fontSize: 11 }}
          className="fill-muted-foreground"
          tickFormatter={(v: number) => formatMillions(v)}
        />
        <Tooltip
          contentStyle={{
            backgroundColor: 'hsl(var(--card))',
            border: '1px solid hsl(var(--border))',
            borderRadius: '0.5rem',
            fontSize: '0.875rem',
          }}
          formatter={(value) => [formatMillions(Number(value)), 'Giá']}
        />
        <Line
          type="monotone"
          dataKey="price"
          stroke="hsl(var(--primary))"
          strokeWidth={2}
          dot={{ r: 4 }}
          activeDot={{ r: 6 }}
        />
      </LineChart>
    </ResponsiveContainer>
  );
}