Charts

"use client";

import * as React from "react";
import { Area, AreaChart, CartesianGrid, ResponsiveContainer, Tooltip, XAxis, YAxis } from "recharts";
import {
  ChartCard,
  ChartTooltip,
  SegmentedControl,
  areaSeriesProps,
  compactCurrency,
  gridProps,
  useChartId,
  xAxisProps,
  yAxisProps,
} from "@dashboardpack/core/components/charts";

const DATA = [
  { month: "Jan", revenue: 31200, orders: 820, profit: 9100 },
  { month: "Feb", revenue: 33800, orders: 910, profit: 10400 },
  { month: "Mar", revenue: 32400, orders: 870, profit: 9800 },
  { month: "Apr", revenue: 37600, orders: 1010, profit: 12200 },
  { month: "May", revenue: 36100, orders: 960, profit: 11500 },
  { month: "Jun", revenue: 41900, orders: 1120, profit: 14100 },
  { month: "Jul", revenue: 44300, orders: 1180, profit: 15200 },
  { month: "Aug", revenue: 43100, orders: 1150, profit: 14700 },
  { month: "Sep", revenue: 48295, orders: 1290, profit: 16800 },
];

const SERIES = [
  { key: "revenue", label: "Revenue" },
  { key: "orders", label: "Orders" },
  { key: "profit", label: "Profit" },
] as const;

/**
 * One chart, several series, switched rather than stacked.
 *
 * `useChartId` is not optional decoration. An SVG `url(#id)` reference resolves to the first
 * match in the *document*, not in this component's subtree — so two copies of this block on one
 * page with a hardcoded gradient id would both paint with whichever gradient rendered first.
 * The catalog page renders many blocks together, which is exactly that situation.
 */
export function ChartAreaTrend() {
  const [series, setSeries] = React.useState<string>("revenue");
  const gradientId = useChartId("area-trend");
  const active = SERIES.find((entry) => entry.key === series) ?? SERIES[0];

  return (
    <ChartCard
      title="Performance"
      subtitle="Monthly, current year"
      height={260}
      action={
        <SegmentedControl
          options={SERIES.map((entry) => ({ label: entry.label, value: entry.key }))}
          value={series}
          onChange={(next) => setSeries(next ?? "revenue")}
          label="Series"
        />
      }
    >
      <ResponsiveContainer width="100%" height="100%">
        <AreaChart data={DATA}>
          <defs>
            <linearGradient id={gradientId} x1="0" y1="0" x2="0" y2="1">
              <stop offset="0%" stopColor="var(--chart-1)" stopOpacity={0.35} />
              <stop offset="100%" stopColor="var(--chart-1)" stopOpacity={0} />
            </linearGradient>
          </defs>
          <CartesianGrid {...gridProps} />
          <XAxis dataKey="month" {...xAxisProps} />
          <YAxis {...yAxisProps} tickFormatter={(v) => compactCurrency(Number(v))} />
          <Tooltip content={<ChartTooltip format={compactCurrency} />} />
          <Area
            {...areaSeriesProps}
            dataKey={active.key}
            name={active.label}
            stroke="var(--chart-1)"
            fill={`url(#${gradientId})`}
          />
        </AreaChart>
      </ResponsiveContainer>
    </ChartCard>
  );
}

"use client";

import { Bar, BarChart, CartesianGrid, Legend, ResponsiveContainer, Tooltip, XAxis, YAxis } from "recharts";
import {
  ChartCard,
  ChartTooltip,
  barSeriesProps,
  count,
  gridProps,
  xAxisProps,
  yAxisProps,
} from "@dashboardpack/core/components/charts";

const DATA = [
  { week: "W1", direct: 240, organic: 180, referral: 90, social: 60 },
  { week: "W2", direct: 260, organic: 195, referral: 105, social: 72 },
  { week: "W3", direct: 235, organic: 205, referral: 98, social: 81 },
  { week: "W4", direct: 288, organic: 224, referral: 120, social: 95 },
  { week: "W5", direct: 301, organic: 240, referral: 112, social: 88 },
  { week: "W6", direct: 322, organic: 258, referral: 134, social: 104 },
];

const SERIES = [
  { key: "direct", label: "Direct", colour: "var(--chart-1)" },
  { key: "organic", label: "Organic", colour: "var(--chart-2)" },
  { key: "referral", label: "Referral", colour: "var(--chart-3)" },
  { key: "social", label: "Social", colour: "var(--chart-4)" },
];

/**
 * How a total divides, over time.
 *
 * `stackId` on every series is what makes it a composition rather than four overlapping bars.
 * Only the last series in the stack gets a rounded top: rounding them all would put a curve in
 * the middle of the column where two segments meet.
 */
export function ChartStackedBars() {
  return (
    <ChartCard title="Sessions by channel" subtitle="Last six weeks" height={260}>
      <ResponsiveContainer width="100%" height="100%">
        <BarChart data={DATA}>
          <CartesianGrid {...gridProps} />
          <XAxis dataKey="week" {...xAxisProps} />
          <YAxis {...yAxisProps} tickFormatter={(v) => count(Number(v))} />
          <Tooltip content={<ChartTooltip format={count} />} />
          <Legend iconType="circle" iconSize={8} wrapperStyle={{ fontSize: 12 }} />
          {SERIES.map((entry, index) => (
            <Bar
              {...barSeriesProps}
              key={entry.key}
              dataKey={entry.key}
              name={entry.label}
              stackId="channels"
              fill={entry.colour}
              radius={index === SERIES.length - 1 ? [4, 4, 0, 0] : 0}
            />
          ))}
        </BarChart>
      </ResponsiveContainer>
    </ChartCard>
  );
}

"use client";

import { Cell, Pie, PieChart, ResponsiveContainer } from "recharts";
import { ChartCard } from "@dashboardpack/core/components/charts";

const DATA = [
  { label: "Direct", value: 35, colour: "var(--chart-1)" },
  { label: "Organic", value: 28, colour: "var(--chart-2)" },
  { label: "Referral", value: 22, colour: "var(--chart-3)" },
  { label: "Social", value: 15, colour: "var(--chart-4)" },
];

/**
 * A breakdown where the legend carries the numbers.
 *
 * Slice labels on a donut are unreadable below about 8% and overlap each other besides, so the
 * figures live in a list beside the chart. That list is also the accessible version: the chart
 * is `aria-hidden`, because a screen reader gets nothing from a pie and everything from the rows.
 */
export function ChartDonutLegend() {
  const total = DATA.reduce((sum, entry) => sum + entry.value, 0);

  return (
    <ChartCard title="Traffic sources" subtitle="Share of sessions" height={220}>
      <div className="flex h-full flex-col items-center gap-6 sm:flex-row">
        <div className="relative h-full w-full max-w-[200px] shrink-0" aria-hidden="true">
          <ResponsiveContainer width="100%" height="100%">
            <PieChart>
              <Pie
                data={DATA}
                dataKey="value"
                nameKey="label"
                innerRadius="62%"
                outerRadius="92%"
                paddingAngle={2}
                strokeWidth={0}
              >
                {DATA.map((entry) => (
                  <Cell key={entry.label} fill={entry.colour} />
                ))}
              </Pie>
            </PieChart>
          </ResponsiveContainer>
          <div className="pointer-events-none absolute inset-0 flex flex-col items-center justify-center">
            <span className="text-xl font-bold tabular-nums">{total}%</span>
            <span className="text-[10px] text-muted-foreground">tracked</span>
          </div>
        </div>

        <ul className="w-full space-y-2.5">
          {DATA.map((entry) => (
            <li key={entry.label} className="flex items-center gap-2.5 text-sm">
              <span
                className="size-2 shrink-0 rounded-full"
                style={{ backgroundColor: entry.colour }}
                aria-hidden="true"
              />
              <span className="flex-1 text-muted-foreground">{entry.label}</span>
              <span className="font-semibold tabular-nums">{entry.value}%</span>
            </li>
          ))}
        </ul>
      </div>
    </ChartCard>
  );
}

"use client";

import { Bar, CartesianGrid, ComposedChart, Line, ResponsiveContainer, Tooltip, XAxis, YAxis } from "recharts";
import {
  ChartCard,
  ChartTooltip,
  barSeriesProps,
  compactCurrency,
  gridProps,
  lineSeriesProps,
  percent,
  xAxisProps,
  yAxisProps,
} from "@dashboardpack/core/components/charts";

const DATA = [
  { month: "Apr", revenue: 37600, margin: 32.4 },
  { month: "May", revenue: 36100, margin: 31.8 },
  { month: "Jun", revenue: 41900, margin: 33.6 },
  { month: "Jul", revenue: 44300, margin: 34.3 },
  { month: "Aug", revenue: 43100, margin: 34.1 },
  { month: "Sep", revenue: 48295, margin: 34.8 },
];

/**
 * Two series in different units.
 *
 * A dual axis is easy to make unreadable. Two things keep it honest here: each axis is tinted
 * with its own series' colour, so there is no guessing which scale a line belongs to, and the
 * two series use different marks — bars for the amount, a line for the rate — because two lines
 * on two scales invite a comparison of slopes that means nothing.
 *
 * `orientation="right"` is physical, not logical, and there is no logical alternative: Recharts
 * lays out in pixels and its axis API accepts only "left" or "right". So the secondary axis stays
 * on the right under RTL while the rest of the page mirrors. That is one of the documented RTL
 * limitations of chart internals rather than something to work around here — the alternative is
 * swapping the axes in JavaScript on direction change, which moves the *data* to a different
 * scale and is far more confusing than an axis on the unexpected side.
 */
export function ChartDualAxis() {
  return (
    <ChartCard title="Revenue and margin" subtitle="Six months" height={260}>
      <ResponsiveContainer width="100%" height="100%">
        <ComposedChart data={DATA}>
          <CartesianGrid {...gridProps} />
          <XAxis dataKey="month" {...xAxisProps} />
          <YAxis
            {...yAxisProps}
            yAxisId="amount"
            tickFormatter={(v) => compactCurrency(Number(v))}
            tick={{ fontSize: 11, fill: "var(--chart-1)" }}
          />
          <YAxis
            {...yAxisProps}
            yAxisId="rate"
            orientation="right"
            domain={[0, 50]}
            tickFormatter={(v) => percent(Number(v))}
            tick={{ fontSize: 11, fill: "var(--chart-4)" }}
          />
          <Tooltip
            content={
              <ChartTooltip
                // Branches on the series NAME, which is what a tooltip point carries — there
                // is no dataKey on it. Two series in different units need two formats, or the
                // margin reads as $34.80.
                format={(value, point) =>
                  point?.name === "Margin" ? percent(value) : compactCurrency(value)
                }
              />
            }
          />
          <Bar
            {...barSeriesProps}
            yAxisId="amount"
            dataKey="revenue"
            name="Revenue"
            fill="var(--chart-1)"
            radius={[4, 4, 0, 0]}
          />
          <Line
            {...lineSeriesProps}
            yAxisId="rate"
            dataKey="margin"
            name="Margin"
            stroke="var(--chart-4)"
          />
        </ComposedChart>
      </ResponsiveContainer>
    </ChartCard>
  );
}

"use client";

import {
  CartesianGrid,
  Line,
  LineChart,
  ReferenceArea,
  ReferenceLine,
  ResponsiveContainer,
  Tooltip,
  XAxis,
  YAxis,
} from "recharts";
import {
  ChartCard,
  ChartTooltip,
  count,
  gridProps,
  lineSeriesProps,
  withSuffix,
  xAxisProps,
  yAxisProps,
} from "@dashboardpack/core/components/charts";

const DATA = [
  { day: "Mon", p95: 780 },
  { day: "Tue", p95: 820 },
  { day: "Wed", p95: 910 },
  { day: "Thu", p95: 1180 },
  { day: "Fri", p95: 1420 },
  { day: "Sat", p95: 940 },
  { day: "Sun", p95: 860 },
];

// withSuffix wraps a formatter; it does not create one from a bare suffix.
const ms = withSuffix(count, "ms");

/**
 * A series read against the range it is supposed to stay inside.
 *
 * The band is the point: latency of 1,180ms means nothing until you know the budget was 1,000.
 * `ReferenceArea` is drawn before the line so the line paints over it, and the band uses a
 * low-opacity fill rather than a solid one — a solid block would read as data.
 */
export function ChartReferenceBand() {
  return (
    <ChartCard title="Response time" subtitle="p95, against a 1,000ms budget" height={260}>
      <ResponsiveContainer width="100%" height="100%">
        <LineChart data={DATA}>
          <CartesianGrid {...gridProps} />
          <XAxis dataKey="day" {...xAxisProps} />
          <YAxis {...yAxisProps} domain={[0, 1600]} tickFormatter={(v) => ms(Number(v))} />
          <ReferenceArea y1={0} y2={1000} fill="var(--success)" fillOpacity={0.07} />
          <ReferenceLine
            y={1000}
            stroke="var(--warning)"
            strokeDasharray="4 4"
            label={{ value: "Budget", position: "insideTopRight", fontSize: 11, fill: "var(--warning)" }}
          />
          <Tooltip content={<ChartTooltip format={ms} />} />
          <Line {...lineSeriesProps} dataKey="p95" name="p95" stroke="var(--chart-2)" />
        </LineChart>
      </ResponsiveContainer>
    </ChartCard>
  );
}

"use client";

import { useState } from "react";
import {
  CartesianGrid,
  Line,
  LineChart,
  ResponsiveContainer,
  Tooltip,
  XAxis,
  YAxis,
} from "recharts";
import {
  ChartCard,
  ChartTooltip,
  count,
  gridProps,
  lineSeriesProps,
  xAxisProps,
  yAxisProps,
} from "@dashboardpack/core/components/charts";
import { Button } from "@dashboardpack/core/components/ui/button";
import { LineChart as LineChartIcon } from "lucide-react";

const DATA = [
  { week: "W1", signups: 42 },
  { week: "W2", signups: 61 },
  { week: "W3", signups: 55 },
  { week: "W4", signups: 78 },
];

/**
 * What a chart card shows when there is nothing to plot.
 *
 * Recharts renders an empty grid and empty axes for an empty dataset, which looks like a chart that
 * failed to load rather than a chart with no data. So the empty case is not a chart at all — it
 * replaces the plot area with a message at the same height.
 *
 * Matching the height is the point. Swapping a 240px chart for a 60px message makes the whole page
 * reflow the moment data arrives, and on a dashboard of eight cards that is a visible jolt.
 *
 * The empty state says what would cause data to appear, rather than "No data". A chart that has
 * never had data and a chart filtered down to nothing need different sentences, and neither of them
 * is "No data available".
 */
export function ChartEmptyState() {
  const [empty, setEmpty] = useState(true);

  return (
    <div className="space-y-3">
      <Button variant="outline" size="sm" onClick={() => setEmpty((prev) => !prev)}>
        {empty ? "Show with data" : "Show empty"}
      </Button>

      {/* ChartCard owns the plot area's height, so both branches occupy the same box and
          nothing reflows when data arrives. */}
      <ChartCard title="Weekly signups" subtitle="New accounts per week" height={240}>
        {empty ? (
          <div className="flex h-full flex-col items-center justify-center gap-3 text-center">
            <span className="flex h-11 w-11 items-center justify-center rounded-full bg-muted text-muted-foreground">
              <LineChartIcon className="h-5 w-5" aria-hidden="true" />
            </span>
            <div className="space-y-1">
              <p className="text-sm font-medium">No signups in this range</p>
              <p className="text-sm text-muted-foreground">
                Widen the date range, or clear the channel filter to include organic traffic.
              </p>
            </div>
          </div>
        ) : (
          <ResponsiveContainer width="100%" height="100%">
            <LineChart data={DATA} margin={{ top: 8, right: 8, bottom: 0, left: -16 }}>
              <CartesianGrid {...gridProps} />
              <XAxis dataKey="week" {...xAxisProps} />
              <YAxis {...yAxisProps} />
              <Tooltip content={<ChartTooltip format={count} />} />
              <Line
                {...lineSeriesProps}
                dataKey="signups"
                name="Signups"
                stroke="var(--chart-1)"
              />
            </LineChart>
          </ResponsiveContainer>
        )}
      </ChartCard>
    </div>
  );
}

"use client";

import { useCallback, useSyncExternalStore } from "react";
import { Bar, BarChart, CartesianGrid, ResponsiveContainer, Tooltip, XAxis, YAxis } from "recharts";
import {
  ChartCard,
  ChartTooltip,
  barSeriesProps,
  compact,
  verticalGridProps,
  xAxisProps,
  yAxisProps,
} from "@dashboardpack/core/components/charts";

const DATA = [
  { source: "Organic search", visits: 48200 },
  { source: "Paid search", visits: 31400 },
  { source: "Direct", visits: 22800 },
  { source: "Referral", visits: 14100 },
  { source: "Social", visits: 8600 },
];

/**
 * Reads `<html dir>` and re-renders when it changes.
 *
 * Deliberately local to this block rather than imported: a copy-paste block should work in a
 * customer's project without dragging a hook along with it. The server snapshot is `"ltr"`, which
 * is what the static export prerenders, so the first client render matches and there is no
 * hydration mismatch — the flip happens on the commit after.
 */
function useHtmlDirection(): "ltr" | "rtl" {
  return useSyncExternalStore(
    useCallback((onChange: () => void) => {
      const observer = new MutationObserver(onChange);
      observer.observe(document.documentElement, { attributes: true, attributeFilter: ["dir"] });
      return () => observer.disconnect();
    }, []),
    () => (document.documentElement.dir === "rtl" ? "rtl" : "ltr"),
    () => "ltr" as const,
  );
}

/**
 * A horizontal bar chart that actually mirrors under RTL.
 *
 * This is the limitation the RTL docs page calls out. Recharts lays out in pixels, so a
 * `layout="vertical"` chart grows left-to-right and puts the category axis on the left regardless of
 * `dir` — the one chart form that does not mirror for free.
 *
 * `reversed` on the value axis and `orientation` on the category axis are what flip it. Nothing in
 * CSS can: the bars are SVG rects positioned by the library.
 */
export function ChartHorizontalBars() {
  const rtl = useHtmlDirection() === "rtl";

  return (
    <ChartCard title="Traffic by source" subtitle="Visits, last 30 days" height={260}>
      <ResponsiveContainer width="100%" height="100%">
        <BarChart data={DATA} layout="vertical" margin={{ top: 4, right: 12, bottom: 0, left: 12 }}>
          <CartesianGrid {...verticalGridProps} />
          <XAxis type="number" reversed={rtl} tickFormatter={(v) => compact(Number(v))} {...xAxisProps} />
          <YAxis
            type="category"
            dataKey="source"
            width={110}
            orientation={rtl ? "right" : "left"}
            {...yAxisProps}
          />
          <Tooltip content={<ChartTooltip format={compact} />} />
          <Bar dataKey="visits" name="Visits" fill="var(--chart-1)" {...barSeriesProps} />
        </BarChart>
      </ResponsiveContainer>
    </ChartCard>
  );
}

"use client";

import { Area, AreaChart, CartesianGrid, ResponsiveContainer, Tooltip, XAxis, YAxis } from "recharts";
import {
  ChartCard,
  ChartTooltip,
  gridProps,
  percent,
  xAxisProps,
  yAxisProps,
} from "@dashboardpack/core/components/charts";

const RAW = [
  { month: "Feb", free: 620, pro: 240, enterprise: 40 },
  { month: "Mar", free: 640, pro: 290, enterprise: 52 },
  { month: "Apr", free: 610, pro: 350, enterprise: 61 },
  { month: "May", free: 580, pro: 420, enterprise: 78 },
  { month: "Jun", free: 540, pro: 480, enterprise: 96 },
  { month: "Jul", free: 505, pro: 540, enterprise: 118 },
];

/**
 * A 100%-stacked area, normalised in the data rather than by the chart.
 *
 * Recharts has `stackOffset="expand"`, which normalises for the *drawing* but leaves the raw counts
 * in the tooltip — so the chart shows 46% while the tooltip says 505, and the reader has to work out
 * that they describe the same thing. Converting to shares up front makes the axis, the areas and the
 * tooltip all agree.
 *
 * The trade-off is losing the absolute totals, so the subtitle carries them. A share chart with no
 * magnitude anywhere cannot tell growth from redistribution.
 */
const DATA = RAW.map((row) => {
  const total = row.free + row.pro + row.enterprise;
  return {
    month: row.month,
    total,
    free: (row.free / total) * 100,
    pro: (row.pro / total) * 100,
    enterprise: (row.enterprise / total) * 100,
  };
});

export function ChartPercentStack() {
  const latest = DATA[DATA.length - 1]!;

  return (
    <ChartCard
      title="Plan mix"
      subtitle={`Share of ${latest.total.toLocaleString("en-US")} accounts`}
      height={260}
    >
      <ResponsiveContainer width="100%" height="100%">
        <AreaChart data={DATA} margin={{ top: 8, right: 8, bottom: 0, left: -20 }}>
          <CartesianGrid {...gridProps} />
          <XAxis dataKey="month" {...xAxisProps} />
          <YAxis domain={[0, 100]} tickFormatter={(v) => percent(Number(v))} {...yAxisProps} />
          <Tooltip content={<ChartTooltip format={percent} />} />
          {[
            { key: "free", name: "Free", tone: "var(--chart-3)" },
            { key: "pro", name: "Pro", tone: "var(--chart-1)" },
            { key: "enterprise", name: "Enterprise", tone: "var(--chart-2)" },
          ].map((series) => (
            <Area
              key={series.key}
              type="monotone"
              dataKey={series.key}
              name={series.name}
              stackId="mix"
              stroke={series.tone}
              fill={series.tone}
              fillOpacity={0.25}
              strokeWidth={2}
              dot={false}
            />
          ))}
        </AreaChart>
      </ResponsiveContainer>
    </ChartCard>
  );
}

"use client";

import {
  PolarAngleAxis,
  PolarGrid,
  PolarRadiusAxis,
  Radar,
  RadarChart,
  ResponsiveContainer,
  Tooltip,
} from "recharts";
import { ChartCard, ChartTooltip, count } from "@dashboardpack/core/components/charts";

const DATA = [
  { axis: "Delivery", team: 82, benchmark: 70 },
  { axis: "Quality", team: 91, benchmark: 74 },
  { axis: "Velocity", team: 64, benchmark: 72 },
  { axis: "Collaboration", team: 88, benchmark: 68 },
  { axis: "Documentation", team: 47, benchmark: 65 },
  { axis: "On-call", team: 76, benchmark: 71 },
];

/**
 * A radar with a benchmark ring behind the measured series.
 *
 * A lone radar shape says nothing — the whole value is the comparison, so the benchmark is drawn
 * first and unfilled, letting the team's shape read as inside or outside it per axis. Documentation
 * dipping under the benchmark is the point of the chart.
 *
 * The radius axis is fixed to `[0, 100]` rather than auto-scaled. Auto-scaling a radar means the
 * shape changes when the data changes even if nothing crossed the benchmark, which makes two
 * screenshots incomparable.
 */
export function ChartRadarProfile() {
  return (
    <ChartCard title="Team scorecard" subtitle="Against the org benchmark" height={280}>
      <ResponsiveContainer width="100%" height="100%">
        <RadarChart data={DATA} outerRadius="72%">
          <PolarGrid stroke="var(--border)" />
          <PolarAngleAxis dataKey="axis" tick={{ fontSize: 11, fill: "var(--muted-foreground)" }} />
          {/* Fixed domain, so the shape is comparable between renders. */}
          <PolarRadiusAxis domain={[0, 100]} tick={false} axisLine={false} />
          <Tooltip content={<ChartTooltip format={count} />} />
          <Radar
            name="Benchmark"
            dataKey="benchmark"
            stroke="var(--muted-foreground)"
            strokeDasharray="4 4"
            fill="none"
          />
          <Radar
            name="This team"
            dataKey="team"
            stroke="var(--chart-1)"
            fill="var(--chart-1)"
            fillOpacity={0.25}
          />
        </RadarChart>
      </ResponsiveContainer>
    </ChartCard>
  );
}

"use client";

import { Card, CardContent } from "@dashboardpack/core/components/ui/card";
import { Sparkline } from "@dashboardpack/core/components/charts";
import { cn } from "@dashboardpack/core/lib/utils";

/**
 * Eight trends at a glance, one sparkline each.
 *
 * `Sparkline` calls `useChartId()` internally, which is what makes this density safe: an SVG
 * `url(#id)` resolves to the first match in the *document*, so eight tiles sharing a hardcoded
 * gradient id would all render in the first tile's colour. `useId()` behind the primitive means the
 * caller cannot get that wrong.
 *
 * It also sets `accessibilityLayer={false}`. Recharts 3 adds `tabindex="0"` to every chart by
 * default, so eight of these would put eight stops in the tab order for graphics carrying nothing a
 * keyboard user can act on — the value and delta beside each one are the accessible content.
 *
 * `invert` marks series where a fall is good, so latency dropping reads green while sessions
 * dropping reads red. Colour follows meaning, not direction.
 */
export function ChartSparklineGrid() {
  const series = [
    { label: "Revenue", value: "$48.3k", delta: 12.4, tone: 1 as const, data: [31, 34, 33, 38, 42, 44, 48] },
    { label: "Orders", value: "1,284", delta: 6.1, tone: 1 as const, data: [980, 1020, 1110, 1090, 1180, 1240, 1284] },
    { label: "Sessions", value: "92.4k", delta: -2.8, tone: 5 as const, data: [98, 97, 95, 96, 94, 93, 92] },
    { label: "Conversion", value: "3.28%", delta: 0.4, tone: 2 as const, data: [2.9, 3.0, 3.1, 3.0, 3.2, 3.2, 3.3] },
    { label: "p95 latency", value: "412ms", delta: -18.2, invert: true, tone: 2 as const, data: [720, 690, 640, 580, 500, 450, 412] },
    { label: "Error rate", value: "0.14%", delta: -0.06, invert: true, tone: 2 as const, data: [0.3, 0.28, 0.24, 0.2, 0.18, 0.16, 0.14] },
    { label: "Churn", value: "2.1%", delta: 0.1, invert: true, tone: 5 as const, data: [1.8, 1.9, 1.9, 2.0, 2.0, 2.0, 2.1] },
    { label: "NPS", value: "48", delta: 4, tone: 3 as const, data: [38, 40, 41, 43, 44, 46, 48] },
  ];

  return (
    <div className="grid grid-cols-2 gap-3 lg:grid-cols-4">
      {series.map((item) => {
        const good = item.invert ? item.delta < 0 : item.delta > 0;
        return (
          <Card key={item.label}>
            <CardContent className="space-y-2 p-3">
              <p className="text-xs text-muted-foreground">{item.label}</p>
              <div className="flex items-baseline justify-between gap-2">
                <p className="text-base font-bold tabular-nums">{item.value}</p>
                <p
                  className={cn(
                    "text-[11px] font-semibold tabular-nums",
                    good ? "text-success" : "text-destructive",
                  )}
                >
                  {item.delta > 0 ? "+" : ""}
                  {item.delta}
                </p>
              </div>
              <Sparkline values={item.data} tone={item.tone} height={28} />
            </CardContent>
          </Card>
        );
      })}
    </div>
  );
}