import { beforeEach, describe, expect, mock, test } from "bun:test";

// Mock playwright before importing runtime-check.
// Use real filesystem paths so we don't need to mock node:fs
// (mocking node:fs globally poisons other test files in the same worker).
let mockExecPath = "/bin/sh"; // a path that always exists
let mockExecThrows = false;

mock.module("playwright", () => {
  return {
    chromium: {
      executablePath: () => {
        if (mockExecThrows) {
          throw new Error("Browser not found");
        }
        return mockExecPath;
      },
    },
  };
});

// Re-import after mocks
const { checkBrowserRuntime } =
  await import("../tools/browser/runtime-check.js");

describe("browser runtime check", () => {
  beforeEach(() => {
    mockExecPath = "/bin/sh";
    mockExecThrows = false;
  });

  test("reports success when playwright and chromium are available", async () => {
    const status = await checkBrowserRuntime();
    expect(status.playwrightAvailable).toBe(true);
    expect(status.chromiumInstalled).toBe(true);
    expect(status.chromiumPath).toBe("/bin/sh");
    expect(status.error).toBeNull();
  });

  test("reports chromium not installed when executable is missing", async () => {
    mockExecPath = "/nonexistent/chromium/path";
    const status = await checkBrowserRuntime();
    expect(status.playwrightAvailable).toBe(true);
    expect(status.chromiumInstalled).toBe(false);
    expect(status.chromiumPath).toBeNull();
    expect(status.error).toContain("Chromium not found");
    expect(status.error).toContain("bunx playwright install chromium");
  });

  test("handles executablePath throwing an error", async () => {
    mockExecThrows = true;
    const status = await checkBrowserRuntime();
    expect(status.playwrightAvailable).toBe(true);
    expect(status.chromiumInstalled).toBe(false);
    expect(status.chromiumPath).toBeNull();
    expect(status.error).toBe("Browser not found");
  });
});