import { describe, expect, it, vi } from "vitest";
import { NextRequest } from "next/server";
import { GET } from "@/app/api/feed/route";
import { createSession } from "@/lib/session-store";

describe("GET /api/feed", () => {
  it("no cookie -> 401 sign_in", async () => {
    const res = await GET(new NextRequest("http://localhost/api/feed"));
    expect(res.status).toBe(401);
    expect(await res.json()).toEqual({ error: "sign_in" });
  });

  it("signed in: page then next page with cursor; limit capped at 50", async () => {
    const sid = createSession({
      profileAccessToken: "p", profileAccessTokenExpiresAt: null, profileRefreshToken: "r",
      feedAccessToken: "T", feedAccessTokenExpiresAt: null,
      person: { userId: "u", name: "A", email: "a@b.co", pictureUrl: null }, createdAt: Date.now(),
    });
    const urls: string[] = [];
    const orig = globalThis.fetch;
    globalThis.fetch = vi.fn(async (url: string) => {
      urls.push(String(url));
      const next = urls.length === 1 ? "C1" : null;
      return new Response(JSON.stringify({ data: [{ n: urls.length }], metadata: { nextCursor: next } }), { status: 200 });
    }) as unknown as typeof fetch;
    try {
      const h = { cookie: `mfb_session=${sid}` };
      const r1 = await GET(new NextRequest("http://localhost/api/feed", { headers: h }));
      expect(await r1.json()).toEqual({ items: [{ n: 1 }], nextCursor: "C1" });
      const r2 = await GET(new NextRequest("http://localhost/api/feed?cursor=C1&limit=500", { headers: h }));
      expect(await r2.json()).toEqual({ items: [{ n: 2 }], nextCursor: null });
      expect(new URL(urls[0]).searchParams.has("cursor")).toBe(false);
      const u2 = new URL(urls[1]);
      expect(u2.searchParams.get("cursor")).toBe("C1");
      expect(u2.searchParams.get("limit")).toBe("50");
    } finally {
      globalThis.fetch = orig;
    }
  });
});