import { screen, waitFor } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { beforeEach, describe, expect, it, vi } from "vitest";
import AddCompanyWizardPage from "@/app/(app)/companies/new/page";
import { renderWithQueryClient } from "./test-utils";

vi.mock("next/navigation", () => ({
  useRouter: () => ({ push: vi.fn(), replace: vi.fn() }),
  useSearchParams: () => new URLSearchParams(),
}));

const DISCOVERED_PROFILE = {
  name: "Acme Widgets",
  official_website: "https://acmewidgets.com",
  description: "Acme Widgets designs and sells handcrafted mechanical widgets.",
  monitoring_focus: null,
  industry: null,
  country: null,
  region: null,
  headquarters: "Austin, Texas",
  aliases: ["Acme Industries"],
  competitors: [],
  public_identifiers: {},
  potential_sources: [
    { source_type: "website", name: "Acme Widgets - Website", base_url: "https://acmewidgets.com" },
  ],
  sources_consulted: ["https://acmewidgets.com"],
};

const EXISTING_COMPANIES = [
  {
    id: "existing-1",
    name: "Acme Widgets",
    slug: "acme-widgets",
    official_website: null,
    description: null,
    monitoring_focus: null,
    industry: null,
    country: null,
    region: null,
    headquarters: null,
    public_identifiers: {},
    status: "active",
    created_at: "2026-01-01T00:00:00Z",
    updated_at: "2026-01-01T00:00:00Z",
    aliases: [],
    competitors: [],
    monitor_configuration: null,
    report_count: 0,
    unresolved_alert_count: 0,
  },
];

function mockFetchImplementation(existingCompanies: unknown[] = []) {
  return vi.fn().mockImplementation((url: string, init?: RequestInit) => {
    const path = url.replace("http://localhost:8000", "");
    if (path === "/api/v1/companies/discover" && init?.method === "POST") {
      return Promise.resolve({ ok: true, status: 200, json: async () => DISCOVERED_PROFILE });
    }
    if (path === "/api/v1/companies" && (!init?.method || init.method === "GET")) {
      return Promise.resolve({ ok: true, status: 200, json: async () => existingCompanies });
    }
    return Promise.resolve({ ok: false, status: 404, json: async () => ({ detail: "not found" }) });
  });
}

beforeEach(() => {
  vi.stubGlobal("fetch", mockFetchImplementation());
});

describe("AddCompanyWizardPage", () => {
  it("only requires a company name on the Discover step", async () => {
    const user = userEvent.setup();
    renderWithQueryClient(<AddCompanyWizardPage />);

    await user.click(screen.getByRole("button", { name: /discover company/i }));

    expect(await screen.findByText(/company name is required/i)).toBeInTheDocument();
  });

  it("discovers a profile and pre-fills the Review step, editable", async () => {
    const user = userEvent.setup();
    renderWithQueryClient(<AddCompanyWizardPage />);

    await user.type(screen.getByLabelText("Company name"), "Acme Widgets");
    await user.click(screen.getByRole("button", { name: /discover company/i }));

    await waitFor(() => {
      expect(screen.getByText(/here's what we found for/i)).toBeInTheDocument();
    });

    const website = screen.getByLabelText("Official website") as HTMLInputElement;
    expect(website.value).toBe("https://acmewidgets.com");
    const headquarters = screen.getByLabelText("Headquarters") as HTMLInputElement;
    expect(headquarters.value).toBe("Austin, Texas");
    const description = screen.getByLabelText("Description") as HTMLTextAreaElement;
    expect(description.value).toBe(
      "Acme Widgets designs and sells handcrafted mechanical widgets.",
    );
    const aliases = screen.getByLabelText(/known aliases/i) as HTMLInputElement;
    expect(aliases.value).toBe("Acme Industries");

    expect(screen.getByText(/we'll start monitoring 1 source/i)).toBeInTheDocument();

    // Still editable - the whole point of the review step.
    await user.clear(headquarters);
    await user.type(headquarters, "Denver, Colorado");
    expect(headquarters.value).toBe("Denver, Colorado");
  });

  it("warns about a likely duplicate before discovering, and proceeds after Continue anyway", async () => {
    vi.stubGlobal("fetch", mockFetchImplementation(EXISTING_COMPANIES));
    const user = userEvent.setup();
    renderWithQueryClient(<AddCompanyWizardPage />);

    await user.type(screen.getByLabelText("Company name"), "Acme Widgets");
    await user.click(screen.getByRole("button", { name: /discover company/i }));

    expect(await screen.findByText(/you might already be monitoring/i)).toBeInTheDocument();
    // Discovery must not have fired yet - still on the Discover step.
    expect(screen.queryByText(/here's what we found for/i)).not.toBeInTheDocument();

    await user.click(screen.getByRole("button", { name: /continue anyway/i }));
    await user.click(screen.getByRole("button", { name: /discover company/i }));

    await waitFor(() => {
      expect(screen.getByText(/here's what we found for/i)).toBeInTheDocument();
    });
    expect(screen.queryByText(/you might already be monitoring/i)).not.toBeInTheDocument();
  });
});