import { mkdtempSync, readdirSync, readFileSync, rmSync } from "node:fs";
import { tmpdir } from "node:os";
import path from "node:path";
import { afterEach, describe, expect, it } from "vitest";
import { createTestSession, type TestSession } from "../../../test/harness";

const extensionPath = path.resolve(import.meta.dirname, "../index.ts");
let root: string | undefined;
let session: TestSession | undefined;

afterEach(() => {
	session?.dispose();
	if (root) rmSync(root, { recursive: true, force: true });
	session = undefined;
	root = undefined;
});

describe("masks debug harness", () => {
	it("writes lifecycle records in the isolated sandbox", async () => {
		root = mkdtempSync(path.join(tmpdir(), "pi-ext-masks-debug-"));
		session = await createTestSession({
			cwd: root,
			env: { PI_MASKS_DEBUG: "1" },
			extensions: [extensionPath],
		});
		await session.session.extensionRunner.emit({
			type: "session_start",
			reason: "startup",
		});
		await session.session.extensionRunner.emit({
			type: "session_shutdown",
			reason: "quit",
		});

		const directory = path.join(
			root,
			".test-state",
			"pi-ext",
			"debug",
			"masks",
		);
		const records = readdirSync(directory).flatMap((file) =>
			readFileSync(path.join(directory, file), "utf8")
				.trim()
				.split("\n")
				.filter(Boolean)
				.map(
					(line) => JSON.parse(line) as { event: string; extension: string },
				),
		);
		expect(records).toContainEqual(
			expect.objectContaining({ event: "session.start", extension: "masks" }),
		);
		expect(records).toContainEqual(
			expect.objectContaining({
				event: "session.shutdown",
				extension: "masks",
			}),
		);
	});
});