import { describe, it, expect, beforeEach, vi } from "vitest";
import { fireEvent, render, screen, waitFor } from "@testing-library/react";

import { OrderSprintProcessModal } from "./order-sprint-process-modal";

// Mock the client PB so we can assert on the update payload written
// when the operator clicks "Process Item". The modal also reads price
// list + order history in `useEffect` — we stub those with empty
// results so the test focuses purely on the save behaviour.
const { updateMock, getListMock, supplierSearchStub, fetchMock } = vi.hoisted(() => ({
  updateMock: vi.fn(),
  getListMock: vi.fn(),
  supplierSearchStub: vi.fn(),
  fetchMock: vi.fn(),
}));

vi.mock("@/lib/pocketbase", () => ({
  __esModule: true,
  default: () => ({
    collection: () => ({
      getList: (...args: unknown[]) => getListMock(...args),
      update: updateMock,
    }),
  }),
}));

// Replace SupplierSearch with a plain <select> so we can drive
// supplier selection from tests without rendering the real combobox.
vi.mock("@/components/ui/supplier-search", () => ({
  SupplierSearch: ({
    value,
    onValueChange,
    suppliers,
  }: {
    value: string;
    onValueChange: (v: string) => void;
    suppliers: Array<{ id: string; suppliername: string }>;
  }) => (
    <select
      aria-label="Supplier"
      value={value}
      onChange={(e) => onValueChange(e.target.value)}
    >
      <option value="">Pick…</option>
      {suppliers.map((s) => (
        <option key={s.id} value={s.id}>
          {s.suppliername}
        </option>
      ))}
    </select>
  ),
}));

void supplierSearchStub; // silence unused

const baseItem = {
  id: "item-1",
  description: "HSS drill bit",
  quantity: 2,
  order_qty: 10,
  selling_price: 50,
  supplier: "",
  cost_price: 0,
  markup: 0,
  sku: "",
  notes: "",
  category: "",
  po_description: "",
  item_status: "pending",
  ai_item_insights: null,
};

const suppliers = [
  { id: "sup-1", suppliername: "Steel Co" },
  { id: "sup-2", suppliername: "Bolt Suppliers" },
];

function renderModal(props: Partial<React.ComponentProps<typeof OrderSprintProcessModal>> = {}) {
  return render(
    <OrderSprintProcessModal
      item={baseItem}
      suppliers={suppliers as never}
      open
      onClose={vi.fn()}
      onProcessed={vi.fn()}
      {...props}
    />,
  );
}

async function setField(labelOrPlaceholder: string, value: string) {
  // The pricing inputs are wired with htmlFor/id; the other text
  // inputs use placeholders. Prefer the label, fall back to the
  // placeholder.
  let input: HTMLElement;
  try {
    input = screen.getByLabelText(labelOrPlaceholder, { exact: false });
  } catch {
    input = screen.getByPlaceholderText(labelOrPlaceholder);
  }
  fireEvent.change(input, { target: { value } });
}

describe("OrderSprintProcessModal", () => {
  beforeEach(() => {
    updateMock.mockReset();
    updateMock.mockResolvedValue({});
    // Order history + price list fetches resolve to empty lists so
    // the modal mounts without throwing. We don't assert on them.
    getListMock.mockResolvedValue({ items: [], totalItems: 0, totalPages: 1 });
    // The context panel + margin-approval endpoint both go through
    // the global fetch. Route by URL so each gets a valid body —
    // returning the approval payload for the context call would
    // crash the panel's noData computation.
    fetchMock.mockImplementation(async (input: RequestInfo | URL) => {
      const url = typeof input === "string" ? input : input.toString();
      if (url.includes("/context")) {
        return new Response(
          JSON.stringify({
            generated_at: "2026-08-07T00:00:00Z",
            match: { sku: "", match_kind: "none", match_confidence: 0 },
            last_quote: null, last_order: null, last_invoiced: null, stock: null,
            suppliers: [], cheapest: null,
          }),
          { status: 200, headers: { "content-type": "application/json" } },
        );
      }
      return new Response(JSON.stringify({ webhookFired: true }), {
        status: 200,
        headers: { "content-type": "application/json" },
      });
    });
    vi.stubGlobal("fetch", fetchMock);
  });

  it("writes item_status='processed' when supplier + cost + po_description are all set", async () => {
    renderModal();
    // supplier
    fireEvent.change(screen.getByLabelText("Supplier"), {
      target: { value: "sup-1" },
    });
    // cost
    await setField("Cost (ZAR)", "25");
    // po_description (uses placeholder because there's no <Label htmlFor> wiring)
    fireEvent.change(
      screen.getByPlaceholderText("Description the supplier sees on the PO"),
      { target: { value: "10mm HSS drill bit" } },
    );

    fireEvent.click(screen.getByRole("button", { name: /process item/i }));

    await waitFor(() => {
      expect(updateMock).toHaveBeenCalledTimes(1);
    });
    const [id, payload] = updateMock.mock.calls[0]!;
    expect(id).toBe("item-1");
    expect(payload).toMatchObject({
      supplier: "sup-1",
      cost_price: 25,
      po_description: "10mm HSS drill bit",
      item_status: "processed",
    });
  });

  it("asks for approval and does not process when markup is below 22%", async () => {
    const onProcessed = vi.fn();
    renderModal({ onProcessed });
    fireEvent.change(screen.getByLabelText("Supplier"), {
      target: { value: "sup-1" },
    });
    await setField("Cost (ZAR)", "45");
    fireEvent.change(
      screen.getByPlaceholderText("Description the supplier sees on the PO"),
      { target: { value: "10mm HSS drill bit" } },
    );

    fireEvent.click(screen.getByRole("button", { name: /process item/i }));

    expect(
      screen.getByRole("heading", { name: /manager approval required/i }),
    ).toBeInTheDocument();
    expect(updateMock).not.toHaveBeenCalled();

    fireEvent.click(
      screen.getByRole("button", { name: /save draft & request approval/i }),
    );

    await waitFor(() => {
      expect(onProcessed).toHaveBeenCalledTimes(1);
    });
    const approvalCall = fetchMock.mock.calls.find(
      (c) => typeof c[0] === "string" && c[0].includes("/request-margin-approval"),
    );
    expect(approvalCall).toBeDefined();
    expect(approvalCall![0]).toBe(
      "/api/v1/order-items/item-1/request-margin-approval",
    );
    expect(JSON.parse(approvalCall![1].body)).toMatchObject({
      source: "order_sprint",
      draft: {
        cost_price: 45,
        selling_price: 50,
        supplier: "sup-1",
      },
    });
  });

  it("keeps item_status='pending' when po_description is empty", async () => {
    renderModal();
    fireEvent.change(screen.getByLabelText("Supplier"), {
      target: { value: "sup-1" },
    });
    await setField("Cost (ZAR)", "25");
    // po_description left blank
    fireEvent.change(
      screen.getByPlaceholderText("Description the supplier sees on the PO"),
      { target: { value: "" } },
    );

    fireEvent.click(screen.getByRole("button", { name: /process item/i }));

    await waitFor(() => {
      expect(updateMock).toHaveBeenCalledTimes(1);
    });
    expect(updateMock.mock.calls[0]![1]).toMatchObject({
      item_status: "pending",
    });
  });

  it("keeps item_status='pending' when cost is 0", async () => {
    renderModal();
    fireEvent.change(screen.getByLabelText("Supplier"), {
      target: { value: "sup-1" },
    });
    await setField("Cost (ZAR)", "0");
    fireEvent.change(
      screen.getByPlaceholderText("Description the supplier sees on the PO"),
      { target: { value: "anything" } },
    );

    fireEvent.click(screen.getByRole("button", { name: /process item/i }));

    await waitFor(() => {
      expect(updateMock).toHaveBeenCalledTimes(1);
    });
    expect(updateMock.mock.calls[0]![1]).toMatchObject({
      item_status: "pending",
    });
  });

  it("does not downgrade items that are already past 'processed'", async () => {
    renderModal({
      item: { ...baseItem, item_status: "po_generated", cost_price: 25, supplier: "sup-1", po_description: "x" },
    });

    // No supplier / cost / po_description changes needed — those are pre-filled.
    fireEvent.click(screen.getByRole("button", { name: /process item/i }));

    await waitFor(() => {
      expect(updateMock).toHaveBeenCalledTimes(1);
    });
    expect(updateMock.mock.calls[0]![1]).toMatchObject({
      item_status: "po_generated",
    });
  });

  it("refuses to save when no supplier is selected", async () => {
    renderModal();
    await setField("Cost (ZAR)", "25");
    fireEvent.change(
      screen.getByPlaceholderText("Description the supplier sees on the PO"),
      { target: { value: "10mm HSS drill bit" } },
    );

    fireEvent.click(screen.getByRole("button", { name: /process item/i }));

    // updateMock is not called — the modal gates on supplier first.
    await waitFor(() => {
      expect(updateMock).not.toHaveBeenCalled();
    });
  });

  it("locks the selling price as read-only (no input is rendered)", () => {
    renderModal();
    // No <input> for selling — the selling value is rendered as a
    // styled div. Operators can't change what came in from the order.
    expect(screen.queryByLabelText(/selling \(zar\)/i)).toBeNull();
    // The locked value still surfaces so the operator sees margin.
    expect(screen.getByText(/R50\.00/)).toBeInTheDocument();
  });

  it("defaults qty to order_qty and writes it to order_qty on save", async () => {
    renderModal();
    // Default value comes from item.order_qty (10), not quantity (2).
    expect(
      (screen.getByLabelText(/po qty/i) as HTMLInputElement).value,
    ).toBe("10");
    // Override and save — verify order_qty is in the payload.
    fireEvent.change(screen.getByLabelText(/po qty/i), {
      target: { value: "8" },
    });
    fireEvent.change(screen.getByLabelText("Supplier"), {
      target: { value: "sup-1" },
    });
    await setField("Cost (ZAR)", "25");
    fireEvent.change(
      screen.getByPlaceholderText("Description the supplier sees on the PO"),
      { target: { value: "10mm HSS drill bit" } },
    );

    fireEvent.click(screen.getByRole("button", { name: /process item/i }));

    await waitFor(() => {
      expect(updateMock).toHaveBeenCalledTimes(1);
    });
    expect(updateMock.mock.calls[0]![1]).toMatchObject({
      order_qty: 8,
    });
  });

  it("falls back to quantity when order_qty is missing", () => {
    renderModal({ item: { ...baseItem, order_qty: undefined, quantity: 5 } });
    expect(
      (screen.getByLabelText(/po qty/i) as HTMLInputElement).value,
    ).toBe("5");
  });

  it("computes markup from cost + selling at save time", async () => {
    // baseItem.selling_price = 50. Cost = 25 → markup = ((50-25)/25)*100 = 100.
    renderModal();
    fireEvent.change(screen.getByLabelText("Supplier"), {
      target: { value: "sup-1" },
    });
    await setField("Cost (ZAR)", "25");
    fireEvent.change(
      screen.getByPlaceholderText("Description the supplier sees on the PO"),
      { target: { value: "ok" } },
    );

    fireEvent.click(screen.getByRole("button", { name: /process item/i }));

    await waitFor(() => {
      expect(updateMock).toHaveBeenCalledTimes(1);
    });
    expect(updateMock.mock.calls[0]![1]).toMatchObject({
      markup: 100,
      selling_price: 50,
      cost_price: 25,
    });
  });

  it("shows the computed markup percentage next to the locked selling", () => {
    // baseItem.selling_price = 50; cost starts at 0 → markup shows '—'.
    renderModal();
    expect(screen.getByLabelText(/markup/i).textContent).toMatch(/—/);
    // Set cost → markup should turn into "100.0%".
    return setField("Cost (ZAR)", "25").then(() => {
      expect(screen.getByLabelText(/markup/i).textContent).toMatch(/100\.0%/);
    });
  });

  it("shows the order description as a read-only hint above the PO description", () => {
    renderModal();
    // Order description should render above the textarea (read-only).
    expect(
      screen.getByLabelText(/order description \(read-only\)/i),
    ).toBeInTheDocument();
    expect(
      screen.getByLabelText(/order description \(read-only\)/i),
    ).toHaveTextContent("HSS drill bit");
    // The PO description textarea is still editable below it.
    expect(
      screen.getByPlaceholderText("Description the supplier sees on the PO"),
    ).toBeInTheDocument();
  });

  it("shows the resolved supplier name on each Recent Orders row", async () => {
    // The history fetch is the FIRST getList call (PB returns the
    // most recent matching order_items). Seed it with a row whose
    // supplier id maps to "Steel Co" in our suppliers list — the
    // row should render that name so the operator can see who
    // supplied it last time without expanding the PB relation.
    getListMock.mockResolvedValueOnce({
      items: [{
        id: "hist-1",
        description: "HSS drill bit",
        sku: "DRL-001",
        supplier: "sup-1",
        cost_price: 20,
        selling_price: 50,
        markup: 150,
        order: "order-prev",
        updated: "2026-07-01",
        expand: { order: { order_number: "ORD-PREV" } },
      }],
      totalItems: 1,
      totalPages: 1,
    });
    // Subsequent fetches (price_list) stay empty.
    getListMock.mockResolvedValue({ items: [], totalItems: 0, totalPages: 1 });

    renderModal();
    await waitFor(() => {
      expect(screen.getByText("Steel Co")).toBeInTheDocument();
    });
    // Order number + cost + selling still show alongside.
    expect(screen.getByText("ORD-PREV")).toBeInTheDocument();
    expect(screen.getByText(/R20\.00/)).toBeInTheDocument();
  });

  it("omits the supplier chip when the history row's supplier id is not in the suppliers list", async () => {
    getListMock.mockResolvedValueOnce({
      items: [{
        id: "hist-1",
        description: "HSS drill bit",
        sku: "DRL-001",
        supplier: "sup-deleted",
        cost_price: 20,
        selling_price: 50,
        markup: 150,
        order: "order-prev",
        updated: "2026-07-01",
        expand: { order: { order_number: "ORD-PREV" } },
      }],
      totalItems: 1,
      totalPages: 1,
    });
    getListMock.mockResolvedValue({ items: [], totalItems: 0, totalPages: 1 });

    renderModal();
    await waitFor(() => {
      expect(screen.getByText("ORD-PREV")).toBeInTheDocument();
    });
    // The unknown supplier id should not be surfaced as a fallback
    // — the chip is omitted entirely so the operator doesn't see a
    // stale id. (Both "Steel Co" and "Bolt Suppliers" appear in the
    // mocked SupplierSearch <option>s, so we can't use a generic
    // negative-text assertion; instead we confirm the unknown id
    // is NOT rendered anywhere.)
    expect(screen.queryByText("sup-deleted")).toBeNull();
  });
});