Agent Limits Card 01

"use client";

import {
  RiArrowRightLine,
  RiArrowDownSLine,
  RiArrowRightSLine,
} from "@remixicon/react";
import { cn } from "cn";
import * as React from "react";

import { Button } from "@/components/ui/button";
import { Card, CardContent } from "@/components/ui/card";
import {
  Collapsible,
  CollapsibleContent,
  CollapsibleTrigger,
} from "@/components/ui/collapsible";
import { Progress } from "@/components/ui/progress";
import { Separator } from "@/components/ui/separator";

export interface AgentLimitSegment {
  label: string;
  tokens: number;
  color?: string;
  deferred?: boolean;
}
export interface AgentLimitGroup {
  label: string;
  items: { label: string; tokens: number }[];
}
export interface AgentUsageLimit {
  label: string;
  used: number;
  resets: string;
}
export interface AgentLimitsCardProps {
  context: {
    max: number;
    segments: AgentLimitSegment[];
    groups?: AgentLimitGroup[];
  };
  plan: string;
  planHref?: string;
  limits: AgentUsageLimit[];
  defaultExpanded?: boolean;
  expanded?: boolean;
  onExpandedChange?: (open: boolean) => void;
  className?: string;
}

const palette = [
  "var(--ring)",
  "var(--chart-5)",
  "var(--chart-3)",
  "var(--chart-1)",
  "var(--status-dot-yellow-dot, var(--foreground))",
  "var(--destructive)",
];
const number = new Intl.NumberFormat("en", {
  notation: "compact",
  maximumFractionDigits: 1,
});
const clamp = (value: number) => Math.min(1, Math.max(0, value));

function Count({
  value,
  compact = false,
}: {
  value: number;
  compact?: boolean;
}) {
  const [display, setDisplay] = React.useState(value);
  const previous = React.useRef(value);
  React.useEffect(() => {
    const media = window.matchMedia("(prefers-reduced-motion: reduce)");
    const from = previous.current;
    if (media.matches || from === value) {
      previous.current = value;
      setDisplay(value);
      return;
    }
    const start = performance.now();
    let frame = 0;
    const tick = (now: number) => {
      const t = Math.min(1, (now - start) / 320);
      const next = Math.round(from + (value - from) * (1 - (1 - t) ** 3));
      previous.current = next;
      setDisplay(next);
      if (t < 1) {
        frame = requestAnimationFrame(tick);
      }
    };
    frame = requestAnimationFrame(tick);
    return () => cancelAnimationFrame(frame);
  }, [value]);
  return <>{compact ? number.format(display) : display}</>;
}

export function AgentLimitsCard({
  context,
  plan,
  planHref,
  limits,
  defaultExpanded,
  expanded,
  onExpandedChange,
  className,
}: AgentLimitsCardProps) {
  const max = Math.max(0, context.max);
  const used = context.segments.reduce(
    (sum, segment) =>
      sum + (segment.deferred ? 0 : Math.max(0, segment.tokens)),
    0
  );
  const ratio = max > 0 ? used / max : 0;
  const remaining = Math.max(0, max - used);
  return (
    <Card
      role="region"
      aria-label="Agent usage"
      variant="muted"
      className={cn("@container w-full max-w-[400px]", className)}
    >
      <CardContent className="gap-0">
        <div className="text-sm leading-4.5 text-foreground">
          <Collapsible
            defaultOpen={defaultExpanded}
            open={expanded}
            onOpenChange={onExpandedChange}
          >
            <CollapsibleTrigger
              render={<Button variant="unstyled" radius={4} />}
              className="group block w-full text-left whitespace-normal"
            >
              <span className="flex w-full flex-wrap items-center gap-2 font-normal">
                <span className="flex-1 font-medium text-muted-foreground">
                  Context capacity
                </span>
                <span className="text-muted-foreground tabular-nums">
                  <Count value={used} compact /> / <Count value={max} compact />{" "}
                  <span className="font-medium text-foreground">
                    (<Count value={Math.round(ratio * 100)} />
                    %)
                  </span>
                </span>
                <RiArrowDownSLine
                  aria-hidden
                  className="size-3 text-muted-foreground transition-transform duration-200 group-data-panel-open:rotate-180 motion-reduce:transition-none"
                />
              </span>
            </CollapsibleTrigger>
            <div
              role="img"
              aria-label={`${number.format(used)} of ${number.format(max)} tokens used`}
              className="mt-2 flex h-1.5 origin-left overflow-hidden rounded-full bg-border agent-limits-card-01-draw"
            >
              {context.segments.map(
                (segment, index) =>
                  !segment.deferred && (
                    <span
                      key={index}
                      className="w-(--segment-width) bg-(--segment-color)"
                      style={
                        {
                          "--segment-width": `${max > 0 ? clamp(Math.max(0, segment.tokens) / max) * 100 : 0}%`,
                          "--segment-color":
                            segment.color ?? palette[index % palette.length],
                        } as React.CSSProperties
                      }
                    />
                  )
              )}
            </div>
            <CollapsibleContent>
              <div className="flex flex-col gap-2 pt-4">
                {context.segments.map((segment, index) => (
                  <div
                    key={index}
                    style={
                      { "--delay": `${index * 40}ms` } as React.CSSProperties
                    }
                    className="agent-limits-card-01-enter grid grid-cols-[minmax(0,1fr)_auto_48px] items-center gap-2 tabular-nums"
                  >
                    <span className="flex min-w-0 items-center gap-2">
                      <span
                        aria-hidden
                        className="size-2 shrink-0 rounded-[2px] bg-(--segment-color)"
                        style={
                          {
                            "--segment-color": segment.deferred
                              ? "var(--border)"
                              : (segment.color ??
                                palette[index % palette.length]),
                          } as React.CSSProperties
                        }
                      />
                      <span className="min-w-0 break-words">
                        {segment.label}
                      </span>
                    </span>
                    <span className="text-muted-foreground">
                      {number.format(segment.tokens)}
                    </span>
                    <span className="text-right font-medium">
                      {segment.deferred
                        ? "—"
                        : `${(max > 0 ? (segment.tokens / max) * 100 : 0).toFixed(1)}%`}
                    </span>
                  </div>
                ))}
                <div className="grid grid-cols-[minmax(0,1fr)_auto_48px] items-center gap-2 tabular-nums">
                  <span className="flex items-center gap-2">
                    <span
                      aria-hidden
                      className="size-2 rounded-[2px] bg-border"
                    />
                    Available
                  </span>
                  <span className="text-muted-foreground">
                    {number.format(remaining)}
                  </span>
                  <span className="text-right font-medium">
                    {(max > 0 ? (remaining / max) * 100 : 0).toFixed(1)}%
                  </span>
                </div>
                {context.groups?.map((group, index) => (
                  <Collapsible key={index} className="group/group">
                    <CollapsibleTrigger
                      render={<Button variant="unstyled" radius={4} />}
                      className="block w-full text-left whitespace-normal"
                    >
                      <span className="flex w-full items-center gap-2 py-1 font-normal text-muted-foreground">
                        <RiArrowRightSLine
                          aria-hidden
                          className="size-3 shrink-0 transition-transform duration-200 group-data-panel-open/group:rotate-90 motion-reduce:transition-none"
                        />
                        <span className="min-w-0 flex-1 break-words">
                          {group.label}
                        </span>
                        <span className="tabular-nums">
                          {number.format(
                            group.items.reduce(
                              (sum, item) => sum + item.tokens,
                              0
                            )
                          )}
                        </span>
                        <span className="w-12 text-right tabular-nums">
                          {group.items.length}
                        </span>
                      </span>
                    </CollapsibleTrigger>
                    <CollapsibleContent>
                      <div className="flex flex-col gap-2 py-1 pl-5">
                        {group.items.map((item, itemIndex) => (
                          <div
                            key={itemIndex}
                            className="flex justify-between gap-2 text-muted-foreground tabular-nums"
                          >
                            <span className="min-w-0 break-words">
                              {item.label}
                            </span>
                            <span>{number.format(item.tokens)}</span>
                          </div>
                        ))}
                      </div>
                    </CollapsibleContent>
                  </Collapsible>
                ))}
              </div>
            </CollapsibleContent>
          </Collapsible>
          <Separator className="my-4" />
          <div className="flex flex-col gap-3">
            {planHref ? (
              <a
                href={planHref}
                className="flex items-center justify-between gap-2 rounded-[4px] font-medium text-muted-foreground transition-colors duration-150 hover:text-foreground motion-reduce:transition-none focus-visible:outline-2 focus-visible:outline-ring"
              >
                Usage allowance · {plan}
                <RiArrowRightLine aria-hidden className="size-3" />
              </a>
            ) : (
              <div className="font-medium text-muted-foreground">
                Usage allowance · {plan}
              </div>
            )}
            {limits.map((limit, index) => (
              <div
                key={index}
                style={{ "--delay": `${index * 40}ms` } as React.CSSProperties}
                className="agent-limits-card-01-enter flex flex-col gap-1.5"
              >
                <div className="flex items-baseline gap-2">
                  <span className="min-w-0 flex-1 font-medium">
                    {limit.label}
                  </span>
                  <span className="hidden text-right text-muted-foreground @[300px]:block">
                    {limit.resets}
                  </span>
                  <span className="font-medium tabular-nums">
                    <Count value={Math.round(clamp(limit.used) * 100)} />%
                  </span>
                </div>
                <Progress
                  aria-label={limit.label}
                  value={Math.round(clamp(limit.used) * 100)}
                />
              </div>
            ))}
          </div>
        </div>
      </CardContent>
    </Card>
  );
}