import { cleanup, renderHook, waitFor } from "@testing-library/react";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";

const apiMocks = vi.hoisted(() => ({
  getMarineForecast: vi.fn(),
  getNearestTide: vi.fn()
}));
vi.mock("../src/api", () => apiMocks);

import { useMarineData } from "../src/hooks/useMarineData";

beforeEach(() => {
  apiMocks.getMarineForecast.mockResolvedValue({ source: "test", updatedAt: new Date().toISOString() });
  apiMocks.getNearestTide.mockResolvedValue({
    station: "test",
    distanceKm: 1,
    nextHigh: null,
    nextLow: null,
    waterLevelCurve: [],
    source: "test",
    updatedAt: new Date().toISOString()
  });
});

afterEach(() => {
  cleanup();
  vi.clearAllMocks();
});

describe("useMarineData", () => {
  it("does not refetch weather and tide for every GPS jitter inside the same rounded cell", async () => {
    const { result, rerender } = renderHook(
      ({ position }) => useMarineData(position),
      { initialProps: { position: { lat: 53.201, lon: 7.101 } } }
    );

    await waitFor(() => expect(result.current.loading).toBe(false));
    expect(apiMocks.getMarineForecast).toHaveBeenCalledTimes(1);
    expect(apiMocks.getNearestTide).toHaveBeenCalledTimes(1);

    rerender({ position: { lat: 53.203, lon: 7.103 } });
    await Promise.resolve();
    expect(apiMocks.getMarineForecast).toHaveBeenCalledTimes(1);
    expect(apiMocks.getNearestTide).toHaveBeenCalledTimes(1);

    rerender({ position: { lat: 53.216, lon: 7.116 } });
    await waitFor(() => expect(apiMocks.getMarineForecast).toHaveBeenCalledTimes(2));
    expect(apiMocks.getNearestTide).toHaveBeenCalledTimes(2);
  });

  it("keeps partial data visible and exposes the failed source separately", async () => {
    apiMocks.getMarineForecast.mockRejectedValueOnce(new Error("forecast offline"));

    const { result } = renderHook(() =>
      useMarineData({ lat: 53.2159, lon: 6.5766 })
    );

    await waitFor(() => expect(result.current.loading).toBe(false));

    expect(result.current.forecast).toBeNull();
    expect(result.current.tide?.station).toBe("test");
    expect(result.current.forecastError).toBe("Wetterdaten nicht erreichbar");
    expect(result.current.tideError).toBeNull();
    expect(result.current.error).toBeNull();
    expect(result.current.queryPosition).toEqual({ lat: 53.22, lon: 6.58 });
    expect(result.current.refreshedAt).toEqual(expect.any(String));
  });
});