import { afterEach, describe, expect, it, vi } from "vitest";
import { readFileSync } from "node:fs";
import { VERSION } from "../src/index.js";

const packageVersion = (
    JSON.parse(
        readFileSync(new URL("../package.json", import.meta.url), "utf-8"),
    ) as { version: string }
).version;

class ExitCalled extends Error {}

describe("version", () => {
    const argv = process.argv;

    afterEach(() => {
        process.argv = argv;
        vi.restoreAllMocks();
    });

    it("exports the version from package.json", () => {
        expect(VERSION).toBe(packageVersion);
    });

    // Runs bin/quak.ts with --version. commander prints the version and then
    // calls process.exit, which is stubbed to throw so the test survives.
    it("reports the version from package.json in quak --version", async () => {
        const printed: string[] = [];
        vi.spyOn(process.stdout, "write").mockImplementation((chunk) => {
            printed.push(String(chunk));
            return true;
        });
        vi.spyOn(process, "exit").mockImplementation(() => {
            throw new ExitCalled();
        });
        process.argv = ["node", "quak", "--version"];

        await expect(import("../bin/quak.js")).rejects.toBeInstanceOf(
            ExitCalled,
        );
        expect(printed.join("").trim()).toBe(packageVersion);
    });
});