import React from "react";
import "@testing-library/jest-dom";
import { act, fireEvent, render, screen, waitFor } from "@testing-library/react";
import { api } from "./api";
import { I18nProvider } from "./i18n/I18nProvider";
import QuickCommandDialog from "./components/QuickCommandDialog";

const mockedApi = api as jest.Mocked<typeof api>;

beforeEach(() => {
  jest.clearAllMocks();
  localStorage.removeItem("uiLanguage");
  mockedApi.get.mockImplementation((url: string) => Promise.resolve({ data: url === "/companies"
    ? [{ id: 7, name: "Nordlys AS" }]
    : { items: [{ id: 42, jobTitle: "Platform engineer", company: { name: "Nordlys AS" } }] } } as never));
});

test.each([
  ["Nordlys AS - Platform engineer", "/jobs/42"],
  ["Nordlys AS", "/companies?edit=7"],
])("[PRES-E07] command search opens %s at its existing destination", async (label, destination) => {
  const onNavigate = jest.fn();
  const onClose = jest.fn();
  render(<I18nProvider><QuickCommandDialog open onClose={onClose} onNavigate={onNavigate} onOpenAddJob={jest.fn()} /></I18nProvider>);
  expect(screen.getByRole("dialog", { name: "Quick Search" })).toBeVisible();
  fireEvent.change(screen.getByRole("textbox", { name: "Quick Search" }), { target: { value: "Nordlys" } });
  fireEvent.click(await screen.findByText(label, { exact: true }));
  expect(onNavigate).toHaveBeenCalledWith(destination);
  expect(onClose).toHaveBeenCalledTimes(1);
  expect(mockedApi.post).not.toHaveBeenCalled();
});

test("[PRES-E07 PRES-J04] the capture command opens review without creating a job, and closing clears search", async () => {
  const onOpenAddJob = jest.fn();
  const props = { onClose: jest.fn(), onNavigate: jest.fn(), onOpenAddJob };
  const view = (open: boolean) => <I18nProvider><QuickCommandDialog open={open} {...props} /></I18nProvider>;
  const { rerender } = render(view(true));
  fireEvent.click(screen.getByRole("button", { name: /add new job/i }));
  expect(onOpenAddJob).toHaveBeenCalledTimes(1);
  expect(mockedApi.post).not.toHaveBeenCalled();
  fireEvent.change(screen.getByRole("textbox"), { target: { value: "Nordlys" } });
  await screen.findByText("Nordlys AS - Platform engineer");
  rerender(view(false));
  rerender(view(true));
  await waitFor(() => expect(screen.getByRole("textbox")).toHaveValue(""));
  expect(screen.queryByText("Nordlys AS - Platform engineer")).not.toBeInTheDocument();
});

test("[P5-00 PRES-E07] command and empty results use valid list semantics", async () => {
  render(<I18nProvider><QuickCommandDialog open onClose={jest.fn()} onNavigate={jest.fn()} onOpenAddJob={jest.fn()} /></I18nProvider>);
  expect(screen.getAllByRole("listitem")).toHaveLength(6);
  expect(screen.getAllByRole("list").every(list => Array.from(list.children).every(item => item.tagName === "LI"))).toBe(true);
  fireEvent.change(screen.getByRole("textbox"), { target: { value: "no-such-result" } });
  mockedApi.get.mockResolvedValue({ data: [] } as never);
  await screen.findByText("No matching commands or records.");
  expect(screen.queryAllByRole("list").every(list => Array.from(list.children).every(item => item.tagName === "LI"))).toBe(true);
  expect(mockedApi.post).not.toHaveBeenCalled();
});

test("[P5-02 PRES-E07] search failure is distinct from no matches and Retry recovers", async () => {
  mockedApi.get.mockRejectedValueOnce(new Error("offline"));
  render(<I18nProvider><QuickCommandDialog open onClose={jest.fn()} onNavigate={jest.fn()} onOpenAddJob={jest.fn()} /></I18nProvider>);
  fireEvent.change(screen.getByRole("textbox", { name: "Quick Search" }), { target: { value: "Nordlys" } });
  expect(await screen.findByRole("alert")).toHaveTextContent("Search could not be loaded");
  expect(screen.queryByText("No matching commands or records.")).not.toBeInTheDocument();
  fireEvent.click(screen.getByRole("button", { name: "Retry" }));
  expect(await screen.findByText("Nordlys AS - Platform engineer")).toBeInTheDocument();
});

test("[P5-02 PRES-E09] closed and superseded searches cannot display stale account results", async () => {
  let resolveOld!: (value: unknown) => void;
  mockedApi.get.mockImplementation((url: string) => url === "/jobapplications"
    ? new Promise(resolve => { resolveOld = resolve; }) as never
    : Promise.resolve({ data: [] }) as never);
  const props = { onClose: jest.fn(), onNavigate: jest.fn(), onOpenAddJob: jest.fn() };
  const view = (open: boolean) => <I18nProvider><QuickCommandDialog open={open} {...props} /></I18nProvider>;
  const { rerender } = render(view(true));
  fireEvent.change(screen.getByRole("textbox"), { target: { value: "old" } });
  await waitFor(() => expect(resolveOld).toBeDefined());
  rerender(view(false));
  rerender(view(true));
  await act(async () => resolveOld({ data: { items: [{ id: 42, jobTitle: "Account A job", company: { name: "Private" } }] } }));
  expect(screen.queryByText(/Account A job/)).not.toBeInTheDocument();
  expect(screen.getByRole("textbox")).toHaveValue("");
});

test("[P5-02 PRES-E07] a slower old query cannot replace the newer matching results", async () => {
  let resolveOld!: (value: unknown) => void;
  mockedApi.get.mockImplementation((url: string, config?: any) => url === "/companies"
    ? Promise.resolve({ data: [] }) as never
    : config?.params?.q === "old"
      ? new Promise(resolve => { resolveOld = resolve; }) as never
      : Promise.resolve({ data: { items: [{ id: 9, jobTitle: "New result", company: { name: "Current" } }] } }) as never);
  render(<I18nProvider><QuickCommandDialog open onClose={jest.fn()} onNavigate={jest.fn()} onOpenAddJob={jest.fn()} /></I18nProvider>);
  const search = screen.getByRole("textbox", { name: "Quick Search" });
  fireEvent.change(search, { target: { value: "old" } });
  await waitFor(() => expect(resolveOld).toBeDefined());
  fireEvent.change(search, { target: { value: "new" } });
  expect(await screen.findByText("Current - New result")).toBeInTheDocument();
  await act(async () => resolveOld({ data: { items: [{ id: 8, jobTitle: "Old result", company: { name: "Private" } }] } }));
  expect(screen.queryByText("Private - Old result")).not.toBeInTheDocument();
});

test("[P5-02 PRES-E07] arrows, Home, End and Enter activate one existing command; composition does not", () => {
  const onNavigate = jest.fn();
  render(<I18nProvider><QuickCommandDialog open onClose={jest.fn()} onNavigate={onNavigate} onOpenAddJob={jest.fn()} /></I18nProvider>);
  const search = screen.getByRole("textbox", { name: "Quick Search" });
  fireEvent.keyDown(search, { key: "End" });
  fireEvent.keyDown(search, { key: "Enter", isComposing: true });
  expect(onNavigate).not.toHaveBeenCalled();
  fireEvent.keyDown(search, { key: "Home" });
  fireEvent.keyDown(search, { key: "ArrowDown" });
  fireEvent.keyDown(search, { key: "Enter" });
  expect(onNavigate).toHaveBeenCalledWith("/jobs");
});

test("[P5-02 PRES-E07] arrowing from a focused result keeps focus and activation on the same item", () => {
  const onNavigate = jest.fn();
  render(<I18nProvider><QuickCommandDialog open onClose={jest.fn()} onNavigate={onNavigate} onOpenAddJob={jest.fn()} /></I18nProvider>);
  const dashboard = screen.getByRole("button", { name: /go to dashboard/i });
  act(() => dashboard.focus());
  fireEvent.keyDown(dashboard, { key: "ArrowDown" });
  const jobs = screen.getByRole("button", { name: /go to jobs/i });
  expect(jobs).toHaveFocus();
  fireEvent.click(jobs);
  expect(onNavigate).toHaveBeenCalledWith("/jobs");
});