import { ExportsService } from "../src/exports/exports.service";
import { createPrismaMock } from "./utils/mock-prisma";

describe("ExportsService", () => {
  it("returns missing_user when user id is absent", async () => {
    const prisma = createPrismaMock();
    const service = new ExportsService(prisma as any);

    const result = await service.exportCsv(undefined);
    expect(result.status).toBe("missing_user");
    expect(prisma.exportLog.create).not.toHaveBeenCalled();
  });

  it("exports csv with headers and rows", async () => {
    const prisma = createPrismaMock();
    prisma.transactionRaw.findMany.mockResolvedValue([
      {
        id: "tx_1",
        date: new Date("2025-01-10"),
        description: "Lunch",
        amount: 20,
        source: "manual",
        derived: { userCategory: "Meals", userNotes: "Team lunch", isHidden: false }
      }
    ]);
    prisma.exportLog.create.mockResolvedValue({ id: "log_1" });
    const service = new ExportsService(prisma as any);

    const result = await service.exportCsv("user_1", { category: "Meals" });
    expect(result.status).toBe("ready");
    expect(result.rowCount).toBe(1);
    expect(result.csv).toContain("id,date,description,amount,category,notes,hidden,source");
    expect(prisma.exportLog.create).toHaveBeenCalledWith(
      expect.objectContaining({
        data: expect.objectContaining({ userId: "user_1", rowCount: 1 })
      })
    );
  });
});