import { act, renderHook, waitFor } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import type { ReactNode } from "react";
import { useController } from "react-hook-form";
import { beforeEach, describe, expect, it, vi } from "vitest";

const rosterGet = vi.fn();
const saveMutate = vi.fn();

vi.mock("@/domain/vendors/api/vendor-company-roster-api", () => ({
  vendorCompanyRosterApi: { get: (...args: unknown[]) => rosterGet(...args) },
}));

vi.mock("@/domain/vendors/use-cases/use-vendor-company-roster", () => ({
  useVendorCompanyRoster: () => ({
    data: undefined,
    isLoading: false,
    isError: false,
    error: null,
    refetch: vi.fn(),
  }),
}));

vi.mock("@/domain/vendors/use-cases/use-vendor-facets", () => ({
  useVendorFacets: () => ({ data: { companies: [], trades: [] } }),
}));

vi.mock("@/domain/vendors/use-cases/use-save-vendor-company-roster", async () => {
  const actual = await vi.importActual<
    typeof import("@/domain/vendors/use-cases/use-save-vendor-company-roster")
  >("@/domain/vendors/use-cases/use-save-vendor-company-roster");
  return {
    ...actual,
    useSaveVendorCompanyRoster: () => ({ mutate: saveMutate, isPending: false }),
  };
});

import { useVendorRosterForm } from "@/app/(protected)/vendors/_components/use-vendor-roster-form";
import type { VendorCompanyRoster, VendorFacetCompany } from "@/domain/vendors/types/vendor";

const company: VendorFacetCompany = {
  companyId: 5,
  name: "Gateway Plumbing",
  companyPhone: "(314) 555-0100",
  email: "dispatch@gateway.test",
  address: "1 Main St",
  city: "St. Louis",
  state: "MO",
  zip: "63101",
  googleMapsUrl: "",
};

const roster: VendorCompanyRoster = {
  companyId: 5,
  rowVersion: "rv-1",
  name: "Gateway Plumbing",
  companyPhone: "(314) 555-0100",
  email: "dispatch@gateway.test",
  address: "1 Main St",
  city: "St. Louis",
  state: "MO",
  zip: "63101",
  googleMapsUrl: "",
  notes: "",
  technicians: [],
};

const secondCompany: VendorFacetCompany = {
  ...company,
  companyId: 6,
  name: "Metro HVAC",
  companyPhone: "(314) 555-0110",
  email: "dispatch@metro.test",
};

const secondRoster: VendorCompanyRoster = {
  ...roster,
  companyId: 6,
  name: "Metro HVAC",
  companyPhone: "(314) 555-0110",
  email: "dispatch@metro.test",
};

function createClient(): QueryClient {
  return new QueryClient({ defaultOptions: { queries: { retry: false } } });
}

function makeWrapper(client: QueryClient) {
  return function Wrapper({ children }: { children: ReactNode }) {
    return <QueryClientProvider client={client}>{children}</QueryClientProvider>;
  };
}

function deferRoster(): {
  promise: Promise<VendorCompanyRoster>;
  resolve: (value: VendorCompanyRoster) => void;
} {
  let resolve!: (value: VendorCompanyRoster) => void;
  const promise = new Promise<VendorCompanyRoster>((resolver) => {
    resolve = resolver;
  });
  return { promise, resolve };
}

describe("useVendorRosterForm load-error handling", () => {
  beforeEach(() => {
    rosterGet.mockReset();
    saveMutate.mockReset();
  });

  it("shows a safe retryable error when selecting an existing company fetch is rejected", async () => {
    rosterGet.mockRejectedValueOnce(new Error("Internal server error"));
    const { result } = renderHook(() => useVendorRosterForm({ mode: "create" }), {
      wrapper: makeWrapper(createClient()),
    });

    expect(result.current.loadErrorMessage).toBeNull();

    await act(async () => {
      await result.current.selectCompany(company);
    });

    expect(result.current.loadErrorMessage).toBe("Couldn't load that company's roster. Try again.");
    expect(result.current.selectedCompanyId).toBeNull();
  });

  it("preserves entered form data when selecting an existing company fetch is rejected", async () => {
    rosterGet.mockRejectedValueOnce(new Error("Internal server error"));
    const { result } = renderHook(
      () => {
        const form = useVendorRosterForm({ mode: "create" });
        const name = useController({ control: form.control, name: "name" });
        return { form, name };
      },
      { wrapper: makeWrapper(createClient()) },
    );

    await act(async () => {
      result.current.name.field.onChange("Draft Vendor");
    });
    expect(result.current.name.field.value).toBe("Draft Vendor");

    await act(async () => {
      await result.current.form.selectCompany(company);
    });

    expect(result.current.name.field.value).toBe("Draft Vendor");
    expect(result.current.form.loadErrorMessage).toBe(
      "Couldn't load that company's roster. Try again.",
    );
  });

  it("recovers and populates the form on retry after a rejected fetch", async () => {
    rosterGet.mockRejectedValueOnce(new Error("boom"));
    const { result } = renderHook(() => useVendorRosterForm({ mode: "create" }), {
      wrapper: makeWrapper(createClient()),
    });

    await act(async () => {
      await result.current.selectCompany(company);
    });
    expect(result.current.loadErrorMessage).not.toBeNull();

    rosterGet.mockResolvedValueOnce(roster);
    await act(async () => {
      result.current.retryLoad();
    });
    await waitFor(() => expect(result.current.loadErrorMessage).toBeNull());

    expect(result.current.selectedCompanyId).toBe(5);
  });

  it("clears the selected roster when the form is reset", async () => {
    rosterGet.mockResolvedValueOnce(roster);
    const { result } = renderHook(() => useVendorRosterForm({ mode: "create" }), {
      wrapper: makeWrapper(createClient()),
    });

    await act(async () => {
      await result.current.selectCompany(company);
    });
    expect(result.current.selectedCompanyId).toBe(5);

    act(() => result.current.resetForm());

    expect(result.current.selectedCompanyId).toBeNull();
  });

  it("does not expose raw server details in the error message", async () => {
    rosterGet.mockRejectedValueOnce(new Error("Database connection failed at 10.0.0.1"));
    const { result } = renderHook(() => useVendorRosterForm({ mode: "create" }), {
      wrapper: makeWrapper(createClient()),
    });

    await act(async () => {
      await result.current.selectCompany(company);
    });

    expect(result.current.loadErrorMessage).not.toContain("Database");
    expect(result.current.loadErrorMessage).not.toContain("10.0.0.1");
  });
});

describe("useVendorRosterForm prototype defaults", () => {
  it("does not persist the prototype's untouched optional technician card", () => {
    const { result } = renderHook(
      () => useVendorRosterForm({ mode: "create", startWithTechnician: true }),
      { wrapper: makeWrapper(createClient()) },
    );

    act(() => {
      result.current.submit({
        name: "Independent Vendor LLC",
        companyPhone: "(314) 555-0199",
        email: "",
        address: "",
        city: "",
        state: "",
        zip: "",
        googleMapsUrl: "",
        notes: "",
        technicians: [
          {
            contactName: "",
            phone: "",
            email: "",
            preferredContact: "Phone",
            tradeSpecialties: "",
            isActive: true,
          },
        ],
      });
    });

    expect(saveMutate).toHaveBeenCalledWith(
      expect.objectContaining({ values: expect.objectContaining({ technicians: [] }) }),
      expect.any(Object),
    );
  });
});

describe("useVendorRosterForm stale-selection handling", () => {
  beforeEach(() => {
    rosterGet.mockReset();
  });

  it("keeps the newest company roster when two lookups resolve out of order", async () => {
    const first = deferRoster();
    const second = deferRoster();
    rosterGet.mockImplementationOnce(() => first.promise);
    rosterGet.mockImplementationOnce(() => second.promise);

    const { result } = renderHook(
      () => {
        const form = useVendorRosterForm({ mode: "create" });
        const name = useController({ control: form.control, name: "name" });
        return { form, name };
      },
      { wrapper: makeWrapper(createClient()) },
    );

    let firstSelect!: Promise<void>;
    let secondSelect!: Promise<void>;
    act(() => {
      firstSelect = result.current.form.selectCompany(company);
    });
    act(() => {
      secondSelect = result.current.form.selectCompany(secondCompany);
    });

    await act(async () => {
      second.resolve(secondRoster);
      await secondSelect;
    });
    await act(async () => {
      first.resolve(roster);
      await firstSelect;
    });

    expect(result.current.form.selectedCompanyId).toBe(6);
    expect(result.current.name.field.value).toBe("Metro HVAC");
  });

  it("keeps a free-text draft when a pending lookup resolves after clearing to free text", async () => {
    const lookup = deferRoster();
    rosterGet.mockImplementationOnce(() => lookup.promise);

    const { result } = renderHook(
      () => {
        const form = useVendorRosterForm({ mode: "create" });
        const name = useController({ control: form.control, name: "name" });
        return { form, name };
      },
      { wrapper: makeWrapper(createClient()) },
    );

    let pendingSelect!: Promise<void>;
    act(() => {
      pendingSelect = result.current.form.selectCompany(company);
    });

    act(() => {
      result.current.form.clearSelectedCompany("Draft Vendor");
    });
    await act(async () => {
      result.current.name.field.onChange("Draft Vendor");
    });
    expect(result.current.name.field.value).toBe("Draft Vendor");

    await act(async () => {
      lookup.resolve(roster);
      await pendingSelect;
    });

    expect(result.current.form.selectedCompanyId).toBeNull();
    expect(result.current.name.field.value).toBe("Draft Vendor");
  });
});