import { useSearchParams } from "next/navigation";
import { beforeEach, describe, expect, it, vi } from "vitest";
import { useCreateFlow } from "../../app/(app)/create/context/CreateFlowContext";
import { PostLoginDraftTransfer } from "../../app/(app)/create/PostLoginDraftTransfer";
import {
  CREATE_FLOW_ANONYMOUS_KEY,
  CREATE_FLOW_TRANSFER_PENDING_KEY,
} from "../../app/(app)/create/utils/anonymousDraftStorage";
import { saveDraftToServer } from "../../lib/create/api";
import { flushPendingCommunityAvatar } from "../../lib/create/flushPendingCommunityAvatar";
import { clearPendingCommunityAvatarFile } from "../../lib/create/pendingCommunityAvatarUpload";
import {
  renderWithProviders as render,
  screen,
  waitFor,
} from "../utils/test-utils";
import "@testing-library/jest-dom/vitest";

vi.mock("../../lib/create/api", () => ({
  fetchDraftFromServer: vi.fn().mockResolvedValue(null),
  saveDraftToServer: vi.fn().mockResolvedValue({ ok: true }),
}));

vi.mock("../../lib/create/flushPendingCommunityAvatar", () => ({
  flushPendingCommunityAvatar: vi.fn(),
  forgetFlushedCommunityAvatarUrl: vi.fn(),
}));

vi.mock("../../lib/create/pendingCommunityAvatarUpload", () => ({
  clearPendingCommunityAvatarFile: vi.fn().mockResolvedValue(undefined),
  readPendingCommunityAvatarFile: vi.fn().mockResolvedValue(null),
  storePendingCommunityAvatarFile: vi.fn(),
}));

function mockSearchParams(value: string) {
  vi.mocked(useSearchParams).mockReturnValue(
    new URLSearchParams(value) as NonNullable<
      ReturnType<typeof useSearchParams>
    >,
  );
}

function StateProbe() {
  const { state } = useCreateFlow();
  return (
    <div>
      <span data-testid="title">{state.title ?? ""}</span>
      <span data-testid="avatar">{state.communityAvatarUrl ?? ""}</span>
    </div>
  );
}

describe("PostLoginDraftTransfer", () => {
  beforeEach(() => {
    localStorage.clear();
    localStorage.setItem(
      CREATE_FLOW_ANONYMOUS_KEY,
      JSON.stringify({ title: "Garden Club" }),
    );
    localStorage.setItem(CREATE_FLOW_TRANSFER_PENDING_KEY, "1");
    mockSearchParams("syncDraft=1");
    vi.mocked(flushPendingCommunityAvatar).mockReset();
    vi.mocked(saveDraftToServer).mockClear();
    vi.mocked(clearPendingCommunityAvatarFile).mockClear();
  });

  it("uploads the staged logo before clearing the anonymous draft", async () => {
    let draftStillPresent = false;
    vi.mocked(flushPendingCommunityAvatar).mockImplementation(async () => {
      draftStillPresent =
        localStorage.getItem(CREATE_FLOW_ANONYMOUS_KEY) != null;
      return { status: "uploaded", url: "/api/uploads/from-guest" };
    });

    render(
      <>
        <PostLoginDraftTransfer
          sessionUser={{ id: "user-1", email: "maya@example.com" }}
        />
        <StateProbe />
      </>,
    );

    await waitFor(() => {
      expect(screen.getByTestId("avatar")).toHaveTextContent(
        "/api/uploads/from-guest",
      );
    });
    expect(draftStillPresent).toBe(true);
    expect(localStorage.getItem(CREATE_FLOW_ANONYMOUS_KEY)).toBeNull();
    expect(saveDraftToServer).toHaveBeenCalledWith(
      expect.objectContaining({
        title: "Garden Club",
        communityAvatarUrl: "/api/uploads/from-guest",
      }),
    );
    expect(clearPendingCommunityAvatarFile).toHaveBeenCalled();
  });

  it("keeps the staged file when the upload fails", async () => {
    vi.mocked(flushPendingCommunityAvatar).mockResolvedValue({
      status: "failed",
    });

    render(
      <>
        <PostLoginDraftTransfer
          sessionUser={{ id: "user-1", email: "maya@example.com" }}
        />
        <StateProbe />
      </>,
    );

    await waitFor(() => {
      expect(screen.getByTestId("title")).toHaveTextContent("Garden Club");
    });
    expect(clearPendingCommunityAvatarFile).not.toHaveBeenCalled();
    expect(screen.getByTestId("avatar")).toHaveTextContent("");
  });
});