Framed Scatter

import { type ChartPoint, defineChart, dot, frame } from "@tanstack/charts";
import { motion } from "@tanstack/charts/motion";
import { tooltip } from "@tanstack/charts/tooltip";
import { Chart } from "@tanstack/react-charts/core";
import { useMemo } from "react";

import { scaleLinear } from "d3-scale";
import { Frame } from "lucide-react";

import { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from "@/components/ui/card";

interface ScatterDatum {
    id: string;
    weight: number;
    mpg: number;
    name: string;
}

const motionRenderer = motion({
    initial: "always",
    transition: { type: "spring", stiffness: 170, damping: 18, mass: 1 },
});

function generateDemoData(): ScatterDatum[] {
    const data: ScatterDatum[] = [];
    const models = [
        "Ford Mustang",
        "Chevrolet Impala",
        "Toyota Corolla",
        "Honda Civic",
        "Dodge Challenger",
        "BMW 3 Series",
        "Volkswagen Golf",
        "Nissan Sentra",
        "Subaru Impreza",
        "Mazda 3",
    ];

    for (let i = 0; i < 60; i++) {
        const weight = 1800 + Math.round(Math.random() * 3000);
        const baseMpg = 48 - (weight - 1800) * 0.009;
        const mpg = Math.max(10, Math.round(baseMpg + (Math.random() - 0.5) * 10));
        const name = `${models[i % models.length]} #${i + 1}`;
        data.push({ id: `car-${i}`, weight, mpg, name });
    }
    return data;
}

function shadcnTooltipContent<TDatum>(points: readonly ChartPoint<TDatum>[]) {
    if (points.length === 0) return { title: "", rows: [] };
    const d = points[0].datum as ScatterDatum;
    if (!d) return { title: "", rows: [] };
    return {
        title: d.name,
        rows: [
            { label: "Curb Weight", value: `${d.weight} lbs`, color: "var(--chart-1)" },
            { label: "Fuel Economy", value: `${d.mpg} mpg`, color: "var(--foreground)" },
        ],
    };
}

export function FramedScatter() {
    const data = useMemo(() => generateDemoData(), []);

    const definition = useMemo(
        () =>
            defineChart(
                {
                    renderer: motionRenderer,
                    marks: [
                        frame({
                            inset: 4,
                            radius: 8,
                            fill: "var(--primary)",
                            fillOpacity: 0.05,
                            stroke: "var(--primary)",
                            strokeOpacity: 0.3,
                            strokeWidth: 1.5,
                        }),
                        dot(data, {
                            key: "id",
                            x: "weight",
                            y: "mpg",
                            fill: "var(--chart-1)",
                            fillOpacity: 0.75,
                            r: 4.5,
                            stroke: "var(--background)",
                            strokeWidth: 1,
                        }),
                    ],
                    scales: {
                        x: { scale: scaleLinear, grid: false },
                        y: { scale: scaleLinear, grid: false },
                    },
                    guides: false,
                    margin: 16,
                    theme: {
                        foreground: "var(--muted-foreground)",
                        grid: "transparent",
                        background: "transparent",
                    },
                },
                {
                    keyboard: true,
                    tooltip: {
                        use: tooltip,
                        className:
                            "font-sans shadow-none rounded-md bg-popover text-popover-foreground border p-2 text-xs",
                        anchor: "pointer",
                        placement: "auto",
                        content: (points) => shadcnTooltipContent(points),
                    },
                },
            ),
        [data],
    );

    return (
        <Card className="w-full max-w-xl">
            <CardHeader>
                <CardTitle>Framed Region Scatterplot</CardTitle>
                <CardDescription>Guide-free scatterplot enclosed in a rounded geometric plot frame</CardDescription>
            </CardHeader>
            <CardContent>
                <div className="h-[250px] w-full">
                    <Chart
                        definition={definition}
                        renderer={motionRenderer}
                        height={250}
                        ariaLabel="Framed Region Scatterplot Chart"
                    />
                </div>
            </CardContent>
            <CardFooter className="flex-col items-start gap-2 text-sm">
                <div className="flex items-center gap-2 leading-none font-medium">
                    60 vehicle data points mapped inside bounded SVG frame <Frame className="text-primary h-4 w-4" />
                </div>
                <div className="text-muted-foreground leading-none">
                    Shows strong inverse correlation between vehicle weight and fuel efficiency
                </div>
            </CardFooter>
        </Card>
    );
}

export default FramedScatter;