Wheel & Drag Pannable Zoom Time Window

import { type ChartPoint, defineChart, dot, lineY } from "@tanstack/charts";
import { controlledSignal } from "@tanstack/charts/interaction/signal";
import { type ZoomXWindow, zoomX } from "@tanstack/charts/interaction/zoom";
import { motion } from "@tanstack/charts/motion";
import { tooltip } from "@tanstack/charts/tooltip";
import { Chart } from "@tanstack/react-charts/core";
import { useMemo, useState } from "react";

import "d3-transition";
import { scaleLinear, scaleUtc } from "d3-scale";
import { selection } from "d3-selection";
import { RotateCcw, ZoomIn } from "lucide-react";

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

if (typeof selection !== "undefined" && selection?.prototype && !selection.prototype.interrupt) {
    selection.prototype.interrupt = function () {
        return this;
    };
}

interface StockDatum {
    date: Date;
    close: number;
}

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

function generateDemoData(): StockDatum[] {
    const results: StockDatum[] = [];
    let price = 180;
    const baseDate = new Date(Date.UTC(2024, 0, 1)).getTime();

    for (let i = 0; i < 40; i++) {
        price += Math.cos(i * 0.3) * 5 + (Math.random() - 0.45) * 7;
        results.push({
            date: new Date(baseDate + i * 7 * 24 * 60 * 60 * 1000),
            close: Number(Math.max(120, price).toFixed(2)),
        });
    }
    return results;
}

function shadcnTooltipContent<TDatum>(points: readonly ChartPoint<TDatum>[]) {
    if (points.length === 0) return { title: "", rows: [] };
    const d = points[0].datum as StockDatum;
    if (!d || !d.date) return { title: "", rows: [] };
    const dateObj = d.date instanceof Date ? d.date : new Date(d.date);
    const titleStr = isNaN(dateObj.getTime())
        ? ""
        : dateObj.toLocaleDateString("en-US", { month: "short", day: "numeric", timeZone: "UTC" });
    return {
        title: titleStr,
        rows: [{ label: "Close Price", value: `$${d.close.toFixed(2)}`, color: "var(--chart-1)" }],
    };
}

export function ZoomableTimeWindow() {
    const data = useMemo(() => generateDemoData(), []);
    const fullExtent = useMemo(() => [data[0].date, data[data.length - 1].date] as [Date, Date], [data]);

    const [zoomWindow, setZoomWindow] = useState<ZoomXWindow<Date>>({
        start: data[10].date,
        end: data[30].date,
    });

    const resetZoom = () => {
        setZoomWindow({ start: fullExtent[0], end: fullExtent[1] });
    };

    const visibleData = useMemo(() => {
        const startTime =
            zoomWindow.start instanceof Date ? zoomWindow.start.getTime() : new Date(zoomWindow.start).getTime();
        const endTime = zoomWindow.end instanceof Date ? zoomWindow.end.getTime() : new Date(zoomWindow.end).getTime();
        return data.filter((d) => {
            const t = d.date instanceof Date ? d.date.getTime() : new Date(d.date).getTime();
            return t >= startTime && t <= endTime;
        });
    }, [data, zoomWindow]);

    const definition = useMemo(
        () =>
            defineChart(
                {
                    renderer: motionRenderer,
                    marks: [
                        lineY(visibleData, {
                            id: "zoom-series-line",
                            x: "date",
                            y: "close",
                            stroke: "var(--chart-1)",
                            strokeWidth: 2.5,
                        }),
                        dot(visibleData, {
                            id: "zoom-series-points",
                            x: "date",
                            y: "close",
                            fill: "var(--chart-1)",
                            r: 3.5,
                            stroke: "var(--background)",
                            strokeWidth: 1,
                        }),
                    ],
                    scales: {
                        x: {
                            scale: scaleUtc().domain([
                                zoomWindow.start instanceof Date ? zoomWindow.start : new Date(zoomWindow.start),
                                zoomWindow.end instanceof Date ? zoomWindow.end : new Date(zoomWindow.end),
                            ]),
                            axis: {
                                ticks: {
                                    format: (v: any) => {
                                        const dateObj = v instanceof Date ? v : new Date(v);
                                        return isNaN(dateObj.getTime())
                                            ? ""
                                            : dateObj.toLocaleDateString("en-US", {
                                                  month: "short",
                                                  day: "numeric",
                                                  timeZone: "UTC",
                                              });
                                    },
                                },
                            },
                        },
                        y: {
                            scale: scaleLinear,
                            grid: true,
                            axis: { label: "Stock Close ($)" },
                        },
                    },
                    controls: [
                        zoomX({
                            id: "time-window",
                            window: controlledSignal(zoomWindow, (next: any) =>
                                setZoomWindow({
                                    start: next.start instanceof Date ? next.start : new Date(next.start),
                                    end: next.end instanceof Date ? next.end : new Date(next.end),
                                }),
                            ),
                            extent: fullExtent,
                            scaleExtent: [1, 10],
                            ariaLabel: "Zoomable time window",
                        }),
                    ],
                    margin: { top: 24, right: 24, bottom: 32, left: 45 },
                    theme: {
                        foreground: "var(--muted-foreground)",
                        grid: "var(--border)",
                        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),
                    },
                },
            ),
        [fullExtent, visibleData, zoomWindow],
    );

    const fmtDate = (d: any) => {
        const dateObj = d instanceof Date ? d : new Date(d);
        return isNaN(dateObj.getTime())
            ? ""
            : dateObj.toLocaleDateString("en-US", { month: "short", day: "numeric", timeZone: "UTC" });
    };

    return (
        <Card className="w-full max-w-xl">
            <CardHeader>
                <CardTitle>Wheel & Drag Pannable Zoom Time Window</CardTitle>
                <CardDescription>
                    Scroll wheel to zoom domain and drag to pan across continuous time series
                </CardDescription>
            </CardHeader>
            <CardContent className="space-y-3">
                <div className="flex items-center justify-between">
                    <span className="text-muted-foreground font-mono text-xs">
                        Window: {fmtDate(zoomWindow.start)} → {fmtDate(zoomWindow.end)}
                    </span>
                    <Button size="sm" variant="outline" className="h-7 px-2 text-xs" onClick={resetZoom}>
                        <RotateCcw className="mr-1 h-3 w-3" /> Reset Zoom
                    </Button>
                </div>
                <div className="h-[230px] w-full">
                    <Chart
                        definition={definition}
                        renderer={motionRenderer}
                        height={230}
                        ariaLabel="Wheel & Drag Pannable Zoom Time Window Chart"
                    />
                </div>
            </CardContent>
            <CardFooter className="flex-col items-start gap-2 text-sm">
                <div className="flex items-center gap-2 leading-none font-medium">
                    Scroll wheel or pinch gesture adjusts horizontal zoom level dynamically{" "}
                    <ZoomIn className="h-4 w-4 text-emerald-500" />
                </div>
                <div className="text-muted-foreground leading-none">
                    `zoomX` control binds wheel and pan gestures directly to UTC scale domains
                </div>
            </CardFooter>
        </Card>
    );
}

export default ZoomableTimeWindow;