import { render, screen, within } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { describe, expect, it, vi } from "vitest";

import type { ConfirmRow } from "@/lib/server/collection-confirm-service";
import { makeAiRow, makeCheck } from "./ai-fixtures";
import { ItemsTable } from "./items-table";

const plain: ConfirmRow = {
  id: "row-p",
  sku: "SK-9",
  description: "Plain",
  order_qty: 1,
  qty_collected: 1,
  cost_price: 1,
  surplus_qty: 0,
};

const noop = vi.fn();

describe("ItemsTable AI layer", () => {
  it("renders the original six headers and no AI/tick/robot UI without AI data", () => {
    render(<ItemsTable rows={[plain]} onCostChange={noop} onSkuChange={noop} />);
    const headers = screen.getAllByRole("columnheader").map((h) => h.textContent);
    expect(headers).toEqual(["SKU", "Description", "Ord", "Coll", "Cost", "Surplus"]);
    expect(screen.queryByLabelText(/^SKU: /)).not.toBeInTheDocument();
    expect(screen.queryByTestId("ai-sku-robot-row-p")).not.toBeInTheDocument();
    expect(screen.queryByText(/add to pos/i)).not.toBeInTheDocument();
  });

  it("adds AI and POS headers when a row has ai_check", () => {
    render(<ItemsTable rows={[makeAiRow()]} onCostChange={noop} onSkuChange={noop} />);
    const headers = screen.getAllByRole("columnheader").map((h) => h.textContent);
    expect(headers).toEqual(["SKU", "Description", "Ord", "Coll", "Cost", "Surplus", "AI", "POS"]);
  });

  it("renders four ticks with aria-labels from computeLineTicks and ours-vs-document titles", () => {
    const row = makeAiRow({
      sku: "SK-001",
      qty_collected: 9,
      cost_price: 45,
      ai_check: makeCheck({
        same_item: "likely",
        doc_line: {
          line_no: 1,
          code: "SK-001",
          description: "Totally different thing",
          quantity: 10,
          unit: "ea",
          unit_price: null,
          line_total: null,
          to_follow: null,
          price_note: "",
        },
      }),
    });
    render(<ItemsTable rows={[row]} onCostChange={noop} onSkuChange={noop} />);
    expect(screen.getByLabelText(/^SKU: matches/)).toBeInTheDocument();
    expect(screen.getByLabelText(/^Qty: doesn't match/)).toBeInTheDocument();
    expect(screen.getByLabelText(/^Desc: have a look/)).toBeInTheDocument();
    expect(screen.getByLabelText(/^Price: can't check/)).toBeInTheDocument();
    expect(screen.getByLabelText(/^Qty: doesn't match/)).toHaveAttribute(
      "title",
      expect.stringContaining("9"),
    );
    expect(screen.getByLabelText(/^Price: can't check — Ours: R45.00/)).toBeInTheDocument();
    const desc = screen.getByLabelText(/^Desc: have a look/).getAttribute("title") ?? "";
    expect(desc).toContain("Item 1");
    expect(desc).toContain("Totally different thing");
  });

  it("a 'different' verdict is all red even when the code matches", () => {
    const row = makeAiRow({ ai_check: makeCheck({ same_item: "different" }) });
    render(<ItemsTable rows={[row]} onCostChange={noop} onSkuChange={noop} />);
    expect(screen.getByLabelText(/^SKU: doesn't match/)).toBeInTheDocument();
    expect(screen.getByLabelText(/^Desc: doesn't match/)).toBeInTheDocument();
  });

  it("shows the amber label", () => {
    const row = makeAiRow({ ai_check: makeCheck({ same_item: "likely" }) });
    render(<ItemsTable rows={[row]} onCostChange={noop} onSkuChange={noop} />);
    expect(screen.getByLabelText(/^Desc: have a look/)).toBeInTheDocument();
  });

  it("shows the robot next to the SKU only while the SKU equals sku_filled_value", () => {
    const filled = makeAiRow({ id: "a", sku: "SK-001", ai_check: makeCheck({ sku_filled_value: "SK-001" }) });
    const human = makeAiRow({ id: "b", sku: "HUMAN", ai_check: makeCheck({ sku_filled_value: "SK-001" }) });
    render(<ItemsTable rows={[filled, human]} onCostChange={noop} onSkuChange={noop} />);
    expect(screen.getByTestId("ai-sku-robot-a")).toBeInTheDocument();
    expect(screen.queryByTestId("ai-sku-robot-b")).not.toBeInTheDocument();
  });

  it("stock rows: shows, ticks and robot-marks the line's own SKU (line_sku)", () => {
    const stock = makeAiRow({
      id: "s1",
      source: "stock",
      sku: undefined,
      line_sku: "SK-001",
      ai_check: makeCheck({ sku_filled_value: "SK-001" }),
    });
    render(<ItemsTable rows={[stock]} onCostChange={noop} onSkuChange={noop} />);
    const rowEl = screen.getByTestId("ai-ticks-s1").closest("tr")!;
    expect(within(rowEl).getByText("SK-001")).toBeInTheDocument();
    expect(screen.getByTestId("ai-sku-robot-s1")).toBeInTheDocument();
    expect(screen.getByLabelText(/^SKU: matches/)).toBeInTheDocument();
  });

  it("shows In POS with a stock link when in_pos", () => {
    const row = makeAiRow({ in_pos: true, pos_stock_item_id: "stock-77" });
    render(<ItemsTable rows={[row]} onCostChange={noop} onSkuChange={noop} onAddToPos={noop} />);
    const link = screen.getByRole("link", { name: /in pos/i });
    expect(link).toHaveAttribute("href", "/stock/stock-77");
    expect(screen.queryByRole("button", { name: /add to pos/i })).not.toBeInTheDocument();
  });

  it("calls onAddToPos with the row id when not in POS", async () => {
    const onAdd = vi.fn();
    render(<ItemsTable rows={[makeAiRow()]} onCostChange={noop} onSkuChange={noop} onAddToPos={onAdd} />);
    await userEvent.click(screen.getByRole("button", { name: /add to pos/i }));
    expect(onAdd).toHaveBeenCalledWith("row-1");
  });

  it("disables Add to POS on a row without a SKU (Set a SKU first)", async () => {
    const onAdd = vi.fn();
    render(
      <ItemsTable rows={[makeAiRow({ sku: "" })]} onCostChange={noop} onSkuChange={noop} onAddToPos={onAdd} />,
    );
    const button = screen.getByRole("button", { name: /add to pos/i });
    expect(button).toBeDisabled();
    expect(button).toHaveAttribute("title", "Set a SKU first");
    await userEvent.click(button);
    expect(onAdd).not.toHaveBeenCalled();
  });

  it("renders no tick icons for a row without ai_check inside an AI table", () => {
    render(
      <ItemsTable
        rows={[makeAiRow(), { ...plain, in_pos: false }]}
        onCostChange={noop}
        onSkuChange={noop}
      />,
    );
    const rowEl = screen.getByText("Plain").closest("tr")!;
    expect(within(rowEl).queryByLabelText(/^SKU: /)).not.toBeInTheDocument();
  });
});