import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import { afterEach, beforeEach, describe, expect, it } from "vitest";
import { touchMutatingSentinel } from "../../../../src/cli/utils/with-mutating-command.js";

describe("touchMutatingSentinel", () => {
	let tmp: string;

	beforeEach(() => {
		tmp = fs.mkdtempSync(path.join(os.tmpdir(), "mutating-sentinel-"));
	});

	afterEach(() => {
		fs.rmSync(tmp, { recursive: true, force: true });
	});

	it("creates the sentinel file on first call", () => {
		touchMutatingSentinel(tmp);
		expect(fs.existsSync(path.join(tmp, ".tff/observations/.mutating-cli-ran"))).toBe(true);
	});

	it("is idempotent on repeated calls", () => {
		touchMutatingSentinel(tmp);
		touchMutatingSentinel(tmp);
		expect(fs.existsSync(path.join(tmp, ".tff/observations/.mutating-cli-ran"))).toBe(true);
	});

	it("swallows errors silently (non-fatal to mutating commands)", () => {
		// Non-writable path simulation. The function must not throw.
		expect(() => touchMutatingSentinel("/does/not/exist/definitely")).not.toThrow();
	});
});