// @vitest-environment jsdom
import React from "react";
import { act } from "react";
import { createRoot } from "react-dom/client";
import { afterEach, describe, expect, it, vi } from "vitest";

vi.mock("next-intl", () => ({
  useTranslations: () => (key: string) => key,
}));

// Stub next/dynamic — returns null component (recharts not needed in tests)
vi.mock("next/dynamic", () => ({
  default: () => () => null,
}));

const { default: BurnRateChart } = await import(
  "../../../src/app/(dashboard)/dashboard/costs/quota-share/components/BurnRateChart"
);

let container: HTMLDivElement | null = null;
let root: ReturnType<typeof createRoot> | null = null;

async function render(props: Parameters<typeof BurnRateChart>[0]) {
  (globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT =
    true;
  container = document.createElement("div");
  document.body.appendChild(container);
  await act(async () => {
    root = createRoot(container!);
    root.render(<BurnRateChart {...props} />);
  });
}

describe("BurnRateChart", { timeout: 10000 }, () => {
  afterEach(() => {
    if (root && container) act(() => root!.unmount());
    container?.remove();
    container = null;
    root = null;
  });

  it("renders no-data state when usage is null", async () => {
    await render({ usage: null });
    expect(document.body.innerHTML).toContain("burnRateTitle");
    expect(document.body.innerHTML).toContain("no data");
  });

  it("renders no-data state when burnRate is falsy", async () => {
    const usage = {
      dimensions: [],
      burnRate: null,
    };
    await render({ usage: usage as never });
    expect(document.body.innerHTML).toContain("no data");
  });

  it("renders chart when usage has burnRate data", async () => {
    const usage = {
      dimensions: [
        { unit: "tokens", window: "daily", limit: 100000, consumedTotal: 30000, perKey: [] },
      ],
      burnRate: { tokensPerSecond: 10, timeToExhaustionMs: 7_000_000 },
    };
    await render({ usage: usage as never });
    // Should not show no-data message
    expect(document.body.innerHTML).not.toContain("no data yet");
    // Should show exhaustion label
    expect(document.body.innerHTML).toContain("burnRateExhaustsIn");
  });
});