import { afterEach, describe, expect, it, vi } from "vitest";
import { _resetDetectablesCache, getDetectables, steamIdFromEntry } from "@/lib/game/detectables";

afterEach(() => {
    vi.unstubAllGlobals();
    vi.restoreAllMocks();
    _resetDetectablesCache();
});

describe("steamIdFromEntry", () => {
    it("extracts numeric Steam SKUs", () => {
        expect(
            steamIdFromEntry({
                id: "game",
                name: "Game",
                third_party_skus: [{ distributor: "steam", id: "12345" }],
            }),
        ).toBe("12345");
    });

    it("rejects non-numeric or non-Steam SKUs", () => {
        expect(
            steamIdFromEntry({
                id: "game",
                name: "Game",
                third_party_skus: [{ distributor: "steam", id: "abc" }],
            }),
        ).toBeNull();
        expect(
            steamIdFromEntry({
                id: "game",
                name: "Game",
                third_party_skus: [{ distributor: "gog", id: "12345" }],
            }),
        ).toBeNull();
    });

    it("handles missing entries", () => {
        expect(steamIdFromEntry(undefined)).toBeNull();
    });
});

describe("getDetectables", () => {
    it("caches the snapshot within the TTL", async () => {
        const fetchMock = vi.fn(
            async () =>
                ({
                    ok: true,
                    json: async () => [{ id: "1", name: "Game" }],
                }) as Response,
        );
        vi.stubGlobal("fetch", fetchMock);
        const first = await getDetectables();
        const second = await getDetectables();
        expect(first).toHaveLength(1);
        expect(second).toBe(first);
        expect(fetchMock).toHaveBeenCalledOnce();
    });

    it("falls back to empty when fetch rejects", async () => {
        vi.stubGlobal(
            "fetch",
            vi.fn(async () => {
                throw new Error("down");
            }),
        );
        await expect(getDetectables()).resolves.toEqual([]);
    });

    it("falls back to empty on HTTP error", async () => {
        vi.stubGlobal(
            "fetch",
            vi.fn(async () => ({ ok: false, status: 500 }) as Response),
        );
        await expect(getDetectables()).resolves.toEqual([]);
    });
});