/**
 * The manager page's engine parts. The task cards under a conversation show each engine task's
 * Persian stage (and a legacy task's status), and link to the task page. The decision banner lists
 * only the tasks that wait for an answer, is hidden when there are none, posts the answer, and
 * shows a refusal from the server in Persian without losing what was typed.
 */
import { fireEvent, render, screen, waitFor } from "@testing-library/react";
import { beforeEach, describe, expect, it, vi } from "vitest";

const mocks = vi.hoisted(() => ({
  answerTask: vi.fn(),
}));

vi.mock("@/lib/api", () => {
  class FakeApiError extends Error {
    constructor(
      readonly status: number,
      readonly code: string,
      message: string,
    ) {
      super(message);
    }
  }
  return { ApiError: FakeApiError };
});

vi.mock("@/lib/api-engine", () => ({ engineApi: { answerTask: mocks.answerTask } }));

import { ApiError } from "@/lib/api";
import type { EngineTask } from "@/lib/api-engine";
import { DecisionBanner } from "@/app/(app)/manager/_components/decision-banner";
import { ThreadTaskCards } from "@/app/(app)/manager/_components/task-cards";

const ORG = "org-1";

function task(overrides: Partial<EngineTask> = {}): EngineTask {
  return {
    id: "task-1",
    title: "صفحهٔ گزارش فروش",
    status: "running",
    stage: "pending_test",
    pipeline: "default",
    kind: "feature",
    cycle: 1,
    max_cycles: 3,
    thread_id: "thread-1",
    assigned_employee_id: null,
    assignee_name: null,
    created_at: "2026-10-01T00:00:00Z",
    updated_at: "2026-10-01T00:00:00Z",
    ...overrides,
  };
}

beforeEach(() => {
  mocks.answerTask.mockReset();
});

describe("ThreadTaskCards", () => {
  it("shows each engine task's Persian stage and links the card to the task page", () => {
    render(<ThreadTaskCards tasks={[task({ stage: "pending_test" })]} />);

    expect(screen.getByText("در انتظار تست")).toBeInTheDocument();
    expect(screen.getByText("صفحهٔ گزارش فروش").closest("a")).toHaveAttribute(
      "href",
      "/tasks/task-1",
    );
  });

  it("shows a legacy task by its status, since the engine has no stage for it", () => {
    const legacy = task({ id: "task-2", title: "کار قدیمی", stage: null, status: "done" });
    render(<ThreadTaskCards tasks={[legacy]} />);

    expect(screen.getByText("کار قدیمی")).toBeInTheDocument();
    expect(screen.getByText("انجام شد")).toBeInTheDocument();
  });

  it("renders nothing for a conversation without tasks", () => {
    const { container } = render(<ThreadTaskCards tasks={[]} />);

    expect(container).toBeEmptyDOMElement();
  });
});

describe("DecisionBanner", () => {
  it("is hidden when no task waits for an answer", () => {
    const { container } = render(
      <DecisionBanner orgId={ORG} tasks={[task({ stage: "pending_test" })]} onAnswered={vi.fn()} />,
    );

    expect(container).toBeEmptyDOMElement();
  });

  it("lists only the tasks at a pending decision", () => {
    render(
      <DecisionBanner
        orgId={ORG}
        tasks={[
          task({ id: "task-1", title: "کدام پایگاه داده؟", stage: "pending_user_decision" }),
          task({ id: "task-2", title: "تست واحد", stage: "pending_test" }),
        ]}
        onAnswered={vi.fn()}
      />,
    );

    expect(screen.getByText("در انتظار تصمیم شما")).toBeInTheDocument();
    expect(screen.getByText("کدام پایگاه داده؟")).toBeInTheDocument();
    expect(screen.queryByText("تست واحد")).toBeNull();
  });

  it("posts the trimmed answer to the task and reports it", async () => {
    mocks.answerTask.mockResolvedValue({});
    const onAnswered = vi.fn();
    render(
      <DecisionBanner
        orgId={ORG}
        tasks={[task({ id: "task-1", title: "کدام پایگاه داده؟", stage: "pending_user_decision" })]}
        onAnswered={onAnswered}
      />,
    );
    const send = screen.getByRole("button", { name: "ارسال پاسخ" });
    expect(send).toBeDisabled();

    fireEvent.change(screen.getByLabelText("پاسخ شما"), { target: { value: "  PostgreSQL  " } });
    expect(send).toBeEnabled();
    fireEvent.click(send);

    await waitFor(() => expect(onAnswered).toHaveBeenCalledTimes(1));
    expect(mocks.answerTask).toHaveBeenCalledWith(ORG, "task-1", "PostgreSQL");
  });

  it("shows the server's refusal in Persian and keeps the typed answer", async () => {
    mocks.answerTask.mockRejectedValue(
      new ApiError(409, "conflict", "این کار دیگر منتظر پاسخ نیست."),
    );
    const onAnswered = vi.fn();
    render(
      <DecisionBanner
        orgId={ORG}
        tasks={[task({ id: "task-1", title: "کدام پایگاه داده؟", stage: "pending_user_decision" })]}
        onAnswered={onAnswered}
      />,
    );

    fireEvent.change(screen.getByLabelText("پاسخ شما"), { target: { value: "PostgreSQL" } });
    fireEvent.click(screen.getByRole("button", { name: "ارسال پاسخ" }));

    expect(await screen.findByRole("alert")).toHaveTextContent("این کار دیگر منتظر پاسخ نیست.");
    expect(onAnswered).not.toHaveBeenCalled();
    expect(screen.getByLabelText("پاسخ شما")).toHaveValue("PostgreSQL");
  });
});