import { beforeEach, describe, expect, it, vi } from "vitest";
import { CreateFlowUploadValidationError } from "../../lib/create/createFlowUploadValidation";

const readPendingCommunityAvatarFile = vi.fn();
const clearPendingCommunityAvatarFile = vi.fn();
const uploadCreateFlowFile = vi.fn();

vi.mock("../../lib/create/pendingCommunityAvatarUpload", () => ({
  readPendingCommunityAvatarFile: (...args: unknown[]) =>
    readPendingCommunityAvatarFile(...args),
  clearPendingCommunityAvatarFile: (...args: unknown[]) =>
    clearPendingCommunityAvatarFile(...args),
}));

vi.mock("../../lib/create/uploadToServer", () => ({
  uploadCreateFlowFile: (...args: unknown[]) => uploadCreateFlowFile(...args),
}));

import {
  flushPendingCommunityAvatar,
  forgetFlushedCommunityAvatarUrl,
  stateWithPendingCommunityAvatar,
} from "../../lib/create/flushPendingCommunityAvatar";

const pending = new File([new Uint8Array([1, 2, 3])], "logo.png", {
  type: "image/png",
});

describe("flushPendingCommunityAvatar", () => {
  beforeEach(() => {
    readPendingCommunityAvatarFile.mockReset();
    clearPendingCommunityAvatarFile.mockReset();
    uploadCreateFlowFile.mockReset();
    clearPendingCommunityAvatarFile.mockResolvedValue(undefined);
    forgetFlushedCommunityAvatarUrl();
  });

  it("does nothing when no file is staged", async () => {
    readPendingCommunityAvatarFile.mockResolvedValue(null);
    await expect(flushPendingCommunityAvatar()).resolves.toEqual({
      status: "none",
    });
    expect(uploadCreateFlowFile).not.toHaveBeenCalled();
  });

  it("uploads once and remembers the url after the file is cleared", async () => {
    readPendingCommunityAvatarFile
      .mockResolvedValueOnce(pending)
      .mockResolvedValue(null);
    uploadCreateFlowFile.mockResolvedValue({ url: "/api/uploads/logo" });

    const [first, second] = await Promise.all([
      flushPendingCommunityAvatar(),
      flushPendingCommunityAvatar(),
    ]);

    expect(first).toEqual({ status: "uploaded", url: "/api/uploads/logo" });
    expect(second).toEqual(first);
    expect(uploadCreateFlowFile).toHaveBeenCalledTimes(1);
    expect(clearPendingCommunityAvatarFile).toHaveBeenCalledTimes(1);

    await expect(flushPendingCommunityAvatar()).resolves.toEqual({
      status: "uploaded",
      url: "/api/uploads/logo",
    });
    expect(uploadCreateFlowFile).toHaveBeenCalledTimes(1);
  });

  it("drops an invalid file and leaves a transient failure staged", async () => {
    readPendingCommunityAvatarFile.mockResolvedValue(pending);
    uploadCreateFlowFile.mockRejectedValueOnce(
      new CreateFlowUploadValidationError("tooLarge"),
    );

    await expect(flushPendingCommunityAvatar()).resolves.toEqual({
      status: "invalid",
    });
    expect(clearPendingCommunityAvatarFile).toHaveBeenCalledTimes(1);

    uploadCreateFlowFile.mockRejectedValueOnce(new Error("network"));
    await expect(flushPendingCommunityAvatar()).resolves.toEqual({
      status: "failed",
    });
    expect(clearPendingCommunityAvatarFile).toHaveBeenCalledTimes(1);
  });

  it("copies a successful upload onto publish state and blocks on failure", async () => {
    readPendingCommunityAvatarFile.mockResolvedValue(pending);
    uploadCreateFlowFile.mockResolvedValue({ url: "/api/uploads/logo" });

    await expect(
      stateWithPendingCommunityAvatar({ title: "Garden" }),
    ).resolves.toEqual({
      ok: true,
      state: { title: "Garden", communityAvatarUrl: "/api/uploads/logo" },
    });

    forgetFlushedCommunityAvatarUrl();
    uploadCreateFlowFile.mockRejectedValueOnce(new Error("network"));
    await expect(
      stateWithPendingCommunityAvatar({
        title: "Garden",
        communityAvatarFileName: "logo.png",
      }),
    ).resolves.toEqual({ ok: false, reason: "upload_failed" });
  });
});