// @vitest-environment jsdom
import { act, renderHook } from "@testing-library/react";
import { afterEach, describe, expect, it, vi } from "vitest";
import { useRulesEdition } from "../use-rules-edition.js";

const STORAGE_KEY = "initiative:game-system";
const OLD_STORAGE_KEY = "initiative:rules-edition";

describe("useRulesEdition", () => {
	afterEach(() => {
		// Reset to default
		const { result } = renderHook(() => useRulesEdition());
		act(() => result.current.setEdition("5.5e"));
		localStorage.removeItem(STORAGE_KEY);
		localStorage.removeItem(OLD_STORAGE_KEY);
	});

	it("defaults to 5.5e", () => {
		const { result } = renderHook(() => useRulesEdition());
		expect(result.current.edition).toBe("5.5e");
	});

	it("setEdition updates value", () => {
		const { result } = renderHook(() => useRulesEdition());

		act(() => result.current.setEdition("5e"));

		expect(result.current.edition).toBe("5e");
	});

	it("setEdition persists to localStorage", () => {
		const { result } = renderHook(() => useRulesEdition());

		act(() => result.current.setEdition("5e"));

		expect(localStorage.getItem(STORAGE_KEY)).toBe("5e");
	});

	it("multiple hooks stay in sync", () => {
		const { result: r1 } = renderHook(() => useRulesEdition());
		const { result: r2 } = renderHook(() => useRulesEdition());

		act(() => r1.current.setEdition("5e"));

		expect(r2.current.edition).toBe("5e");
	});

	it("accepts pf2e as a valid game system", () => {
		const { result } = renderHook(() => useRulesEdition());

		act(() => result.current.setEdition("pf2e"));

		expect(result.current.edition).toBe("pf2e");
		expect(localStorage.getItem(STORAGE_KEY)).toBe("pf2e");
	});

	it("migrates from old storage key on fresh module load", async () => {
		// Set up old key before re-importing the module
		localStorage.setItem(OLD_STORAGE_KEY, "5e");
		localStorage.removeItem(STORAGE_KEY);

		// Force a fresh module so loadEdition() re-runs at init time
		vi.resetModules();
		const { useRulesEdition: freshHook } = await import(
			"../use-rules-edition.js"
		);

		const { result } = renderHook(() => freshHook());

		expect(result.current.edition).toBe("5e");
		expect(localStorage.getItem(STORAGE_KEY)).toBe("5e");
		expect(localStorage.getItem(OLD_STORAGE_KEY)).toBeNull();
	});
});