import { TransactionsController } from "../src/transactions/transactions.controller";

describe("TransactionsController", () => {
  const createController = () => {
    const service = {
      list: jest.fn().mockResolvedValue([]),
      sync: jest.fn().mockResolvedValue({ created: 0 }),
      summary: jest.fn().mockResolvedValue({ total: "0.00", count: 0 }),
      updateDerived: jest.fn().mockResolvedValue({}),
      createManualTransaction: jest.fn().mockResolvedValue({ id: "tx_1" }),
      cashflow: jest.fn().mockResolvedValue([]),
      merchantInsights: jest.fn().mockResolvedValue([])
    };
    return { controller: new TransactionsController(service as any), service };
  };

  it("lists transactions", async () => {
    const { controller, service } = createController();
    const result = await controller.list({ user_id: "user_1" });
    expect(service.list).toHaveBeenCalledWith(
      expect.objectContaining({ userId: "user_1" })
    );
    expect(result.data).toEqual([]);
  });

  it("syncs transactions", async () => {
    const { controller, service } = createController();
    const result = await controller.sync({ userId: "user_1" });
    expect(service.sync).toHaveBeenCalled();
    expect(result.data).toEqual({ created: 0 });
  });

  it("returns summary", async () => {
    const { controller, service } = createController();
    const result = await controller.summary({ user_id: "user_1" });
    expect(service.summary).toHaveBeenCalled();
    expect(result.data.total).toBe("0.00");
  });

  it("creates manual transaction", async () => {
    const { controller, service } = createController();
    const result = await controller.manual({
      userId: "user_1",
      date: "2025-01-01",
      description: "Manual",
      amount: 10
    });
    expect(service.createManualTransaction).toHaveBeenCalled();
    expect(result.data.id).toBe("tx_1");
  });

  it("returns cashflow", async () => {
    const { controller, service } = createController();
    const result = await controller.cashflow({ user_id: "user_1", months: "3" });
    expect(service.cashflow).toHaveBeenCalledWith("user_1", 3);
    expect(result.data).toEqual([]);
  });

  it("returns merchant insights", async () => {
    const { controller, service } = createController();
    const result = await controller.merchants({ user_id: "user_1", limit: "5" });
    expect(service.merchantInsights).toHaveBeenCalledWith("user_1", 5);
    expect(result.data).toEqual([]);
  });
});