import { describe, it, expect, beforeEach, vi } from "vitest";
import { renderHook, waitFor } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { createElement } from "react";
import { useLoreData } from "@/hooks/useLoreData";
import { setMockResponse, resetMocks } from "../mocks/tauri-api";

function createWrapper() {
  const queryClient = new QueryClient({
    defaultOptions: {
      queries: {
        retry: false,
      },
    },
  });
  return function Wrapper({ children }: { children: React.ReactNode }) {
    return createElement(QueryClientProvider, { client: queryClient }, children);
  };
}

describe("useLoreData", () => {
  beforeEach(() => {
    resetMocks();
  });

  it("returns loading state initially", () => {
    const { result } = renderHook(() => useLoreData(), {
      wrapper: createWrapper(),
    });

    expect(result.current.isLoading).toBe(true);
    expect(result.current.data).toBeUndefined();
  });

  it("returns lore status data on success", async () => {
    const mockStatus = {
      last_sync: "2026-02-26T12:00:00Z",
      is_healthy: true,
      message: "Lore is healthy",
      summary: {
        open_issues: 5,
        authored_mrs: 2,
        reviewing_mrs: 3,
      },
    };

    setMockResponse("get_lore_status", mockStatus);

    const { result } = renderHook(() => useLoreData(), {
      wrapper: createWrapper(),
    });

    await waitFor(() => {
      expect(result.current.isLoading).toBe(false);
    });

    expect(result.current.data).toEqual(mockStatus);
    expect(result.current.error).toBeNull();
  });

  it("returns error state when IPC fails", async () => {
    setMockResponse("get_lore_status", Promise.reject(new Error("IPC failed")));

    const { result } = renderHook(() => useLoreData(), {
      wrapper: createWrapper(),
    });

    await waitFor(() => {
      expect(result.current.isLoading).toBe(false);
    });

    expect(result.current.error).toBeTruthy();
    expect(result.current.data).toBeUndefined();
  });

  it("returns unhealthy status", async () => {
    const mockStatus = {
      last_sync: null,
      is_healthy: false,
      message: "lore not configured",
      summary: null,
    };

    setMockResponse("get_lore_status", mockStatus);

    const { result } = renderHook(() => useLoreData(), {
      wrapper: createWrapper(),
    });

    await waitFor(() => {
      expect(result.current.isLoading).toBe(false);
    });

    expect(result.current.data?.is_healthy).toBe(false);
    expect(result.current.data?.summary).toBeNull();
  });
});