import { Chart } from "@cloudflare/kumo";
import * as echarts from "echarts/core";
import { EChartsOption } from "echarts";
import { useMemo } from "react";
import { useIsDarkMode } from "~/lib/use-is-dark-mode";

export function PieChartDemo() {
  const isDarkMode = useIsDarkMode();

  const options = useMemo<EChartsOption>(
    () => ({
      animation: true,
      animationDuration: 2000,
      tooltip: {
        show: true,
      },
      series: [
        {
          type: "pie",
          data: [
            { value: 101, name: "Series A" },
            { value: 202, name: "Series B" },
            { value: 303, name: "Series C" },
            { value: 404, name: "Series D" },
            { value: 505, name: "Series E" },
          ],
        },
      ],
    }),
    [],
  );

  return (
    <Chart
      echarts={echarts}
      options={options}
      height={400}
      isDarkMode={isDarkMode}
    />
  );
}

import { Chart } from "@cloudflare/kumo";
import * as echarts from "echarts/core";
import { EChartsOption } from "echarts";
import { useMemo } from "react";
import { useIsDarkMode } from "~/lib/use-is-dark-mode";

/**
 * Custom chart with HTML tooltip using dangerousHtmlFormatter.
 * USE WITH CAUTION: Only use dangerousHtmlFormatter for trusted HTML content.
 * Always sanitize any user-provided data using echarts.format.encodeHTML
 * or similar utilities to prevent XSS vulnerabilities.
 */
export function CustomTooltipChartDemo() {
  const isDarkMode = useIsDarkMode();

  const options = useMemo<EChartsOption>(
    () => ({
      tooltip: {
        trigger: "item",
        formatter: (params: any) => {
          // IMPORTANT: Always escape ALL dynamic values using encodeHTML
          // from echarts/format before including in HTML. This prevents
          // XSS attacks from malicious data like:
          // { name: "<img src=x onerror=alert('xss')>", value: "..." }
          const safeName = echarts.format.encodeHTML(params.name);
          const safeValue = echarts.format.encodeHTML(String(params.value));
          const safePercent = echarts.format.encodeHTML(
            String(Math.round(params.percent)),
          );

          return `
            <div style="padding: 8px;">
              <div style="font-weight: 600; margin-bottom: 4px;">${safeName}</div>
              <div>Value: <strong>${safeValue}</strong></div>
              <div style="font-size: 12px; opacity: 0.7; margin-top: 4px;">
                ${safePercent}% of total
              </div>
            </div>
          `;
        },
      },
      series: [
        {
          type: "pie",
          data: [
            { value: 101, name: "Series A" },
            { value: 202, name: "Series B" },
            // Malicious series name to demonstrate XSS protection via encodeHTML.
            // Without encoding, this would render an alert popup. With encodeHTML,
            // it safely displays as plain text.
            { value: 150, name: "<img src=x onerror=alert('XSS')>" },
            { value: 303, name: "Series C" },
            { value: 404, name: "Series D" },
          ],
        },
      ],
    }),
    [],
  );

  return (
    <Chart
      echarts={echarts}
      options={options}
      height={400}
      isDarkMode={isDarkMode}
    />
  );
}