import React from "react";
import "@testing-library/jest-dom";
import { act, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
import { MemoryRouter } from "react-router-dom";
import { api } from "./api";
import { ConfirmProvider } from "./confirm";
import { PromptProvider } from "./prompt";
import { I18nProvider } from "./i18n/I18nProvider";
import JobDiscoveryPage from "./views/JobDiscoveryPage";

jest.mock("./api", () => ({ api: { get: jest.fn(), post: jest.fn(), patch: jest.fn(), delete: jest.fn() } }));
const mockedApi = api as jest.Mocked<typeof api>;

function renderPage() {
  return render(<I18nProvider><ConfirmProvider><PromptProvider><MemoryRouter><JobDiscoveryPage /></MemoryRouter></PromptProvider></ConfirmProvider></I18nProvider>);
}

function searchResponse(data: any[]) {
  mockedApi.get.mockImplementation((url) => Promise.resolve({ data: String(url).endsWith("saved-searches") ? [] : data } as any));
}

beforeEach(() => { jest.resetAllMocks(); window.localStorage.clear(); searchResponse([]); });
afterEach(() => jest.clearAllMocks());

test("shows honest source metadata and offers the existing reviewed save flow", async () => {
  searchResponse([{ id: "abc", title: "Backend Developer", company: "Acme", location: "OSLO", modifiedAt: "2026-08-01T10:00:00Z", deadline: "2026-08-15T23:59:59Z", url: "https://arbeidsplassen.nav.no/stillinger/stilling/abc", source: "nav", sourceName: "NAV Arbeidsplassen", acquisitionType: "searched", retrievedAt: "2026-08-10T10:00:00Z", countryCode: "NO" }]);
  renderPage();
  fireEvent.change(screen.getByLabelText("Role or company"), { target: { value: "backend" } });
  fireEvent.click(screen.getByRole("button", { name: "Search NAV" }));
  expect(await screen.findByText("Backend Developer")).toBeInTheDocument();
  expect(screen.getByText("NAV Arbeidsplassen")).toBeInTheDocument();
  expect(screen.getByText(/Searched listing · Retrieved/)).toBeInTheDocument();
  expect(screen.getByText(/Application deadline:/)).toBeInTheDocument();
  await waitFor(() => expect(mockedApi.get).toHaveBeenCalledWith("/job-discovery/search", { params: { q: "backend", location: undefined } }));
  expect(screen.getByRole("button", { name: "Save to tracker" })).toBeInTheDocument();
});

test("distinguishes the initial guidance from a completed empty search", async () => {
  renderPage();
  expect(screen.getByText("Search recent active vacancies by role, company, or municipality.")).toBeInTheDocument();
  fireEvent.click(screen.getByRole("button", { name: "Search NAV" }));
  expect(await screen.findByText(/No active vacancies matched this search/)).toBeInTheDocument();
  expect(screen.queryByText("Search recent active vacancies by role, company, or municipality.")).not.toBeInTheDocument();
});

test("retries the last submitted search after an error", async () => {
  let searchAttempts = 0;
  mockedApi.get.mockImplementation((url) => {
    if (String(url).endsWith("saved-searches")) return Promise.resolve({ data: [] } as any);
    searchAttempts += 1;
    return searchAttempts === 1 ? Promise.reject(new Error("offline")) : Promise.resolve({ data: [] } as any);
  });
  renderPage();
  fireEvent.change(screen.getByLabelText("Role or company"), { target: { value: "  utvikler  " } });
  fireEvent.change(screen.getByLabelText("Municipality"), { target: { value: "  Oslo  " } });
  fireEvent.click(screen.getByRole("button", { name: "Search NAV" }));
  fireEvent.click(await screen.findByRole("button", { name: "Retry" }));
  await waitFor(() => expect(searchAttempts).toBe(2));
  expect(mockedApi.get).toHaveBeenLastCalledWith("/job-discovery/search", { params: { q: "utvikler", location: "Oslo" } });
});

test("sorts returned vacancies by title", async () => {
  searchResponse([
    { id: "2", title: "Zoologist", url: "https://arbeidsplassen.nav.no/2", source: "nav", countryCode: "NO" },
    { id: "1", title: "Analyst", url: "https://arbeidsplassen.nav.no/1", source: "nav", countryCode: "NO" },
  ]);
  renderPage();
  fireEvent.click(screen.getByRole("button", { name: "Search NAV" }));
  await screen.findByText("2 vacancies found");
  fireEvent.mouseDown(screen.getByRole("combobox", { name: "Sort results" }));
  fireEvent.click(await screen.findByRole("option", { name: "Title A–Z" }));
  expect(screen.getAllByRole("heading", { level: 3 }).map((element) => element.textContent)).toEqual(["Analyst", "Zoologist"]);
});

test("renders the discovery workflow in Norwegian Bokmål", async () => {
  window.localStorage.setItem("uiLanguage", "nb");
  renderPage();
  expect(screen.getByLabelText("Rolle eller bedrift")).toBeInTheDocument();
  fireEvent.click(screen.getByRole("button", { name: "Søk i NAV" }));
  expect(await screen.findByText(/Ingen aktive stillinger samsvarte/)).toBeInTheDocument();
});

test("runs a saved search, marks unseen vacancies, and dismisses them", async () => {
  const saved = { id: 7, name: "Backend Oslo", query: "backend", location: "Oslo", isActive: true, resultCount: 0, dismissedCount: 0 };
  mockedApi.get.mockResolvedValue({ data: [saved] } as any);
  mockedApi.post.mockResolvedValue({ data: { search: { ...saved, resultCount: 1 }, jobs: [{ job: { id: "new-1", title: "Platform Engineer", url: "https://example.test/new-1", source: "nav", countryCode: "NO" }, isNew: true, isDismissed: false }] } } as any);
  mockedApi.patch.mockResolvedValue({ data: null } as any);
  renderPage();
  fireEvent.click(await screen.findByRole("button", { name: "Check for new jobs" }));
  expect(await screen.findByText("Platform Engineer")).toBeInTheDocument();
  expect(screen.getByText("New")).toBeInTheDocument();
  fireEvent.click(screen.getByRole("button", { name: "Dismiss" }));
  await waitFor(() => expect(screen.queryByText("Platform Engineer")).not.toBeInTheDocument());
  expect(mockedApi.patch).toHaveBeenCalledWith("/job-discovery/saved-searches/7/results/new-1/dismiss", { isDismissed: true });
});

test("lets the user pause automatic alerts for a saved search", async () => {
  const saved = { id: 7, name: "Backend Oslo", query: "backend", location: "Oslo", isActive: true, resultCount: 1, dismissedCount: 0 };
  mockedApi.get.mockResolvedValue({ data: [saved] } as any);
  mockedApi.patch.mockResolvedValue({ data: { ...saved, isActive: false } } as any);
  renderPage();

  const toggle = await screen.findByRole("switch", { name: "Automatic alerts" });
  expect(toggle).toBeChecked();
  fireEvent.click(toggle);

  await waitFor(() => expect(mockedApi.patch).toHaveBeenCalledWith("/job-discovery/saved-searches/7", { isActive: false }));
  await waitFor(() => expect(toggle).not.toBeChecked());
});

test("announces saved-search loading without presenting a successful empty list", async () => {
  let finish!: (value: any) => void;
  mockedApi.get.mockReturnValue(new Promise((resolve) => { finish = resolve; }));
  renderPage();
  expect(screen.getByRole("status", { name: "Loading saved searches…" })).toBeInTheDocument();
  expect(screen.queryByText("No saved searches yet.")).not.toBeInTheDocument();
  finish({ data: [] });
  expect(await screen.findByText("No saved searches yet.")).toBeInTheDocument();
  expect(screen.queryByRole("status", { name: "Loading saved searches…" })).not.toBeInTheDocument();
});

test("reports saved-search failure and retries that read without replacing active discovery filters or results", async () => {
  let savedAttempts = 0;
  mockedApi.get.mockImplementation((url) => {
    if (String(url).endsWith("saved-searches")) {
      savedAttempts++;
      return savedAttempts === 1
        ? Promise.reject({ response: { status: 500, data: { detail: "Internal database stack trace" } } })
        : Promise.resolve({ data: [{ id: 7, name: "Backend Oslo", query: "backend", location: "Oslo", isActive: true, resultCount: 0, dismissedCount: 0 }] } as any);
    }
    return Promise.resolve({ data: [{ id: "vacancy", title: "Existing result", url: "https://example.test/vacancy", source: "nav", countryCode: "NO" }] } as any);
  });
  renderPage();
  expect(await screen.findByText("Saved searches could not be loaded. Try again.")).toBeInTheDocument();
  expect(screen.queryByText("No saved searches yet.")).not.toBeInTheDocument();
  expect(screen.getByRole("button", { name: "Save search" })).toBeDisabled();
  expect(screen.queryByText(/Internal database stack trace/)).not.toBeInTheDocument();
  fireEvent.change(screen.getByLabelText("Role or company"), { target: { value: "developer" } });
  fireEvent.change(screen.getByLabelText("Municipality"), { target: { value: "Bergen" } });
  fireEvent.click(screen.getByRole("button", { name: "Search NAV" }));
  await screen.findByText("Existing result");
  fireEvent.click(screen.getByRole("button", { name: "Retry" }));
  expect(await screen.findByText("Backend Oslo")).toBeInTheDocument();
  expect(screen.getByRole("button", { name: "Save search" })).toBeEnabled();
  expect(screen.getByLabelText("Role or company")).toHaveValue("developer");
  expect(screen.getByLabelText("Municipality")).toHaveValue("Bergen");
  expect(screen.getByText("Existing result")).toBeInTheDocument();
  expect(screen.queryByText("Saved searches could not be loaded. Try again.")).not.toBeInTheDocument();
});

test.each([null, { message: "not a list" }, [{ id: 7 }]])("rejects malformed saved-search payload %j as a failed read rather than an empty list", async (data) => {
  mockedApi.get.mockResolvedValue({ data } as any);
  renderPage();
  expect(await screen.findByText("Saved searches could not be loaded. Try again.")).toBeInTheDocument();
  expect(screen.queryByText("No saved searches yet.")).not.toBeInTheDocument();
  expect(screen.getByRole("button", { name: "Retry" })).toBeInTheDocument();
});

const savedSearch = { id: 7, name: "Backend Oslo", query: "backend", location: "Oslo", isActive: true, resultCount: 1, dismissedCount: 0 };
const discoveredJob = { id: "new-1", title: "Platform Engineer", url: "https://example.test/new-1", source: "nav", countryCode: "NO" };

function savedRun(saved = savedSearch, job = discoveredJob) {
  return { data: { search: saved, jobs: [{ job, isNew: true, isDismissed: false }] } };
}

function savedFixture(saved = [savedSearch], jobs: any[] = []) {
  mockedApi.get.mockImplementation((url) => Promise.resolve({ data: String(url).endsWith("saved-searches") ? saved : jobs } as any));
}

function deferred<T>() {
  let resolve!: (value: T) => void;
  let reject!: (reason: unknown) => void;
  const promise = new Promise<T>((yes, no) => { resolve = yes; reject = no; });
  return { promise, resolve, reject };
}

test("a manual search after saved-search results has no dismiss action belonging to the saved search", async () => {
  savedFixture([savedSearch], [{ ...discoveredJob, id: "manual-1", title: "Manual vacancy" }]);
  mockedApi.post.mockResolvedValueOnce(savedRun() as any);
  renderPage();
  fireEvent.click(await screen.findByRole("button", { name: "Check for new jobs" }));
  await screen.findByText("Platform Engineer");
  expect(screen.getByRole("button", { name: "Dismiss" })).toBeInTheDocument();
  fireEvent.change(screen.getByLabelText("Role or company"), { target: { value: "manual query" } });
  fireEvent.click(screen.getByRole("button", { name: "Search NAV" }));
  await screen.findByText("Manual vacancy");
  expect(screen.queryByRole("button", { name: "Dismiss" })).not.toBeInTheDocument();
  expect(mockedApi.get).toHaveBeenCalledWith("/job-discovery/search", { params: { q: "manual query", location: "Oslo" } });
  expect(mockedApi.patch).not.toHaveBeenCalled();
});

test("starting saved search B hides saved search A's results and actions while the B response is held", async () => {
  const second = { ...savedSearch, id: 8, name: "Data Bergen", query: "data", location: "Bergen" };
  const read = deferred<any>();
  savedFixture([savedSearch, second]);
  mockedApi.post.mockResolvedValueOnce(savedRun() as any).mockImplementationOnce(() => read.promise);
  renderPage();
  fireEvent.click((await screen.findAllByRole("button", { name: "Check for new jobs" }))[0]);
  await screen.findByText("Platform Engineer");
  fireEvent.click(screen.getAllByRole("button", { name: "Check for new jobs" })[1]);
  expect(mockedApi.post).toHaveBeenLastCalledWith("/job-discovery/saved-searches/8/run");
  expect(screen.queryByText("Platform Engineer")).not.toBeInTheDocument();
  expect(screen.queryByRole("button", { name: "Dismiss" })).not.toBeInTheDocument();
  expect(screen.getByLabelText("Role or company")).toHaveValue("data");
  expect(screen.getByLabelText("Municipality")).toHaveValue("Bergen");
  expect(screen.getAllByRole("button", { name: "Check for new jobs" }).every((button) => (button as HTMLButtonElement).disabled)).toBe(true);
  await act(async () => { read.resolve(savedRun(second, { ...discoveredJob, id: "b-1", title: "Data Engineer" })); });
  expect(await screen.findByText("Data Engineer")).toBeInTheDocument();
  expect(mockedApi.post).toHaveBeenCalledTimes(2);
  expect(mockedApi.patch).not.toHaveBeenCalled();
});

test("retrying a failed saved-search run repeats that saved ID instead of running a manual query", async () => {
  const retry = deferred<any>();
  savedFixture();
  mockedApi.post.mockRejectedValueOnce(new Error("synthetic NAV unavailable")).mockImplementationOnce(() => retry.promise);
  renderPage();
  fireEvent.click(await screen.findByRole("button", { name: "Check for new jobs" }));
  const retryButton = await screen.findByRole("button", { name: "Retry" });
  fireEvent.change(screen.getByLabelText("Role or company"), { target: { value: "unsubmitted edited query" } });
  fireEvent.change(screen.getByLabelText("Municipality"), { target: { value: "unsubmitted Bergen" } });
  fireEvent.click(retryButton);
  await waitFor(() => expect(mockedApi.post).toHaveBeenCalledTimes(2));
  expect(mockedApi.post.mock.calls.map(([url]) => url)).toEqual(["/job-discovery/saved-searches/7/run", "/job-discovery/saved-searches/7/run"]);
  expect(mockedApi.get.mock.calls.some(([url]) => url === "/job-discovery/search")).toBe(false);
  expect(screen.getByLabelText("Role or company")).toHaveValue("unsubmitted edited query");
  expect(screen.getByLabelText("Municipality")).toHaveValue("unsubmitted Bergen");
  expect(screen.queryByRole("button", { name: "Dismiss" })).not.toBeInTheDocument();
  await act(async () => { retry.resolve(savedRun()); });
  expect(await screen.findByText("Platform Engineer")).toBeInTheDocument();
  expect(screen.getByRole("button", { name: "Dismiss" })).toBeInTheDocument();
  expect(screen.getByLabelText("Role or company")).toHaveValue("unsubmitted edited query");
  expect(screen.getByLabelText("Municipality")).toHaveValue("unsubmitted Bergen");
});

test("failed saved-search creation retains its draft and recovers only through the save action", async () => {
  mockedApi.post.mockRejectedValueOnce(new Error("synthetic save failure")).mockResolvedValueOnce({ data: { ...savedSearch, name: "My search", query: "developer", location: "Bergen" } } as any);
  renderPage();
  await screen.findByText("No saved searches yet.");
  fireEvent.change(screen.getByLabelText("Role or company"), { target: { value: "developer" } });
  fireEvent.change(screen.getByLabelText("Municipality"), { target: { value: "Bergen" } });
  fireEvent.change(screen.getByLabelText("Search name"), { target: { value: "My search" } });
  fireEvent.click(screen.getByRole("button", { name: "Save search" }));
  expect(await screen.findByText("The search could not be saved.")).toBeInTheDocument();
  expect(screen.queryByRole("button", { name: "Retry" })).not.toBeInTheDocument();
  expect(screen.getByLabelText("Search name")).toHaveValue("My search");
  expect(screen.getByLabelText("Role or company")).toHaveValue("developer");
  expect(screen.getByLabelText("Municipality")).toHaveValue("Bergen");
  expect(mockedApi.post).toHaveBeenCalledTimes(1);
  fireEvent.click(screen.getByRole("button", { name: "Save search" }));
  expect(await screen.findByText("My search")).toBeInTheDocument();
  expect(mockedApi.post).toHaveBeenCalledTimes(2);
  expect(mockedApi.post).toHaveBeenLastCalledWith("/job-discovery/saved-searches", { name: "My search", query: "developer", location: "Bergen" });
  expect(mockedApi.get).toHaveBeenCalledTimes(1);
});

test("a failed alert toggle retains its checked state and recovers through that same toggle without manual search retry", async () => {
  savedFixture();
  mockedApi.patch.mockRejectedValueOnce(new Error("synthetic alerts failure")).mockResolvedValueOnce({ data: { ...savedSearch, isActive: false } } as any);
  renderPage();
  const toggle = await screen.findByRole("switch", { name: "Automatic alerts" });
  fireEvent.click(toggle);
  expect(await screen.findByText("The alert setting could not be updated. Try again.")).toBeInTheDocument();
  expect(toggle).toBeChecked();
  expect(screen.queryByRole("button", { name: "Retry" })).not.toBeInTheDocument();
  expect(mockedApi.patch).toHaveBeenCalledTimes(1);
  fireEvent.click(toggle);
  await waitFor(() => expect(toggle).not.toBeChecked());
  expect(mockedApi.patch).toHaveBeenCalledTimes(2);
  expect(mockedApi.patch).toHaveBeenLastCalledWith("/job-discovery/saved-searches/7", { isActive: false });
  expect(mockedApi.get).toHaveBeenCalledTimes(1);
});

test("failed saved-search deletion preserves the search and requires another explicit confirmation to recover", async () => {
  savedFixture();
  mockedApi.delete.mockRejectedValueOnce(new Error("synthetic delete failure")).mockResolvedValueOnce({ data: null } as any);
  renderPage();
  fireEvent.click(await screen.findByRole("button", { name: "Delete" }));
  let dialog = await screen.findByRole("dialog", { name: "Delete saved search?" });
  fireEvent.click(within(dialog).getByRole("button", { name: "Delete" }));
  expect(await screen.findByText("The saved search could not be deleted.")).toBeInTheDocument();
  await waitFor(() => expect(screen.queryByRole("dialog")).not.toBeInTheDocument());
  expect(screen.getByText("Backend Oslo")).toBeInTheDocument();
  expect(screen.queryByRole("button", { name: "Retry" })).not.toBeInTheDocument();
  expect(mockedApi.delete).toHaveBeenCalledTimes(1);
  fireEvent.click(screen.getByRole("button", { name: "Delete" }));
  dialog = await screen.findByRole("dialog", { name: "Delete saved search?" });
  fireEvent.click(within(dialog).getByRole("button", { name: "Delete" }));
  await waitFor(() => expect(screen.queryByText("Backend Oslo")).not.toBeInTheDocument());
  expect(mockedApi.delete).toHaveBeenCalledTimes(2);
  expect(mockedApi.delete).toHaveBeenLastCalledWith("/job-discovery/saved-searches/7");
  expect(mockedApi.get).toHaveBeenCalledTimes(1);
});

test("failed dismissal retains the vacancy and recovers only through that same result's dismiss action", async () => {
  savedFixture();
  mockedApi.post.mockResolvedValueOnce(savedRun() as any);
  mockedApi.patch.mockRejectedValueOnce(new Error("synthetic dismiss failure")).mockResolvedValueOnce({ data: null } as any);
  renderPage();
  fireEvent.click(await screen.findByRole("button", { name: "Check for new jobs" }));
  await screen.findByText("Platform Engineer");
  fireEvent.click(screen.getByRole("button", { name: "Dismiss" }));
  expect(await screen.findByText("The vacancy could not be dismissed.")).toBeInTheDocument();
  expect(screen.getByText("Platform Engineer")).toBeInTheDocument();
  expect(screen.queryByRole("button", { name: "Retry" })).not.toBeInTheDocument();
  expect(mockedApi.patch).toHaveBeenCalledTimes(1);
  fireEvent.click(screen.getByRole("button", { name: "Dismiss" }));
  await waitFor(() => expect(screen.queryByText("Platform Engineer")).not.toBeInTheDocument());
  expect(mockedApi.patch).toHaveBeenCalledTimes(2);
  expect(mockedApi.patch).toHaveBeenLastCalledWith("/job-discovery/saved-searches/7/results/new-1/dismiss", { isDismissed: true });
  expect(mockedApi.get).toHaveBeenCalledTimes(1);
});

test("a held saved-search creation locks its request snapshot and prevents a second start while preserving a failed draft", async () => {
  const write = deferred<any>();
  mockedApi.post.mockImplementationOnce(() => write.promise);
  renderPage();
  await screen.findByText("No saved searches yet.");
  fireEvent.change(screen.getByLabelText("Role or company"), { target: { value: "  developer  " } });
  fireEvent.change(screen.getByLabelText("Municipality"), { target: { value: "  Bergen  " } });
  fireEvent.change(screen.getByLabelText("Search name"), { target: { value: "  Review my search  " } });
  const save = screen.getByRole("button", { name: "Save search" });
  fireEvent.click(save);
  expect(mockedApi.post).toHaveBeenCalledWith("/job-discovery/saved-searches", { name: "Review my search", query: "developer", location: "Bergen" });
  expect(save).toBeDisabled();
  expect(screen.getByLabelText("Role or company")).toBeDisabled();
  expect(screen.getByLabelText("Municipality")).toBeDisabled();
  expect(screen.getByLabelText("Search name")).toBeDisabled();
  fireEvent.click(save);
  expect(mockedApi.post).toHaveBeenCalledTimes(1);
  await act(async () => { write.reject(new Error("synthetic save failure")); });
  expect(await screen.findByText("The search could not be saved.")).toBeInTheDocument();
  expect(screen.getByLabelText("Role or company")).toHaveValue("  developer  ");
  expect(screen.getByLabelText("Municipality")).toHaveValue("  Bergen  ");
  expect(screen.getByLabelText("Search name")).toHaveValue("  Review my search  ");
  expect(save).toBeEnabled();
  expect(mockedApi.post).toHaveBeenCalledTimes(1);
});

test("a saved-run failure follows the current language without refetching or replaying the request", async () => {
  savedFixture();
  mockedApi.post.mockRejectedValueOnce(new Error("synthetic NAV unavailable"));
  renderPage();
  fireEvent.click(await screen.findByRole("button", { name: "Check for new jobs" }));
  expect(await screen.findByText("NAV job discovery is temporarily unavailable.")).toBeInTheDocument();
  act(() => { window.dispatchEvent(new StorageEvent("storage", { key: "uiLanguage", newValue: "nb" })); });
  expect(screen.getByText("NAVs jobbsøk er midlertidig utilgjengelig.")).toBeInTheDocument();
  expect(screen.queryByText("NAV job discovery is temporarily unavailable.")).not.toBeInTheDocument();
  expect(screen.getByLabelText("Rolle eller bedrift")).toHaveValue("backend");
  expect(screen.getByLabelText("Kommune")).toHaveValue("Oslo");
  expect(mockedApi.get).toHaveBeenCalledTimes(1);
  expect(mockedApi.post).toHaveBeenCalledTimes(1);
  expect(mockedApi.patch).not.toHaveBeenCalled();
  expect(mockedApi.delete).not.toHaveBeenCalled();
});