/**
 * @file Workspace.laneRouter.test.tsx
 * @description The Model (AI Router) picker in the Workspace lane-detail
 * header, exercised through the page rather than through `LaneRouterRow` on its
 * own — one row instance serves every lane, so the bug this pins is a lane
 * switch carrying the previous lane's selection with it: pick a router on one
 * lane, come back to a lane that is on native, and see the router still
 * selected there.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, it, expect, vi, beforeEach } from "vitest";
import { render, act, screen, waitFor } from "@testing-library/react";
import { MemoryRouter } from "react-router-dom";
import userEvent from "@testing-library/user-event";

type LaneFixture = {
  id: number;
  cwd: string;
  title: string;
  pipeline: string;
  pipeline_name: string;
  pipeline_nodes: never[];
  detected_signal: string | null;
  run_id: string | null;
  router_profile: string | null;
};

const lane = (id: number, title: string): LaneFixture => ({
  id,
  cwd: `/workspace/${id}`,
  title,
  pipeline: "default",
  pipeline_name: "default",
  pipeline_nodes: [],
  detected_signal: null,
  run_id: null,
  router_profile: null,
});

const h = vi.hoisted(() => {
  const nativeProfile = {
    name: "native",
    label: "Native",
    builtin: true,
    baseUrl: "",
    hasKey: false,
    model: "claude-sonnet-5",
    models: {
      opus: "claude-opus-5",
      sonnet: "claude-sonnet-5",
      haiku: "claude-haiku-4-5-20251001",
      smallFast: "claude-haiku-4-5-20251001",
      subagent: "claude-haiku-4-5-20251001",
    },
  };
  return {
    lanes: [] as { id: number; router_profile: string | null }[],
    routerApply: vi.fn(),
    profiles: [
      nativeProfile,
      { ...nativeProfile, name: "9router", label: "9Router", builtin: false },
    ],
  };
});

const routerApply = h.routerApply;
let lanesToReturn: LaneFixture[] = [];

vi.mock("../../lib/api", async (importOriginal) => {
  const actual = await importOriginal<Record<string, unknown>>();
  return {
    ...actual,
    api: {
      lanes: {
        list: vi.fn().mockImplementation(async () => ({
          lanes: h.lanes,
          counts: { total: h.lanes.length, running: 0, needs_you: 0, dead: 0 },
        })),
        ensure: vi.fn(),
        action: vi.fn(),
        git: vi.fn().mockResolvedValue({ available: false }),
        runtime: vi.fn().mockResolvedValue({ available: false }),
        stage: vi.fn(),
        update: vi.fn(),
        pipelines: vi
          .fn()
          .mockResolvedValue({ pipelines: [{ id: "default", name: "default", nodes: [] }] }),
        // The route the picker must use — never a lane PATCH.
        routerApply: vi.fn().mockImplementation(async (id: number, profile: string) => {
          h.routerApply(id, profile);
          // The row moving with the call is the server's broadcast, not a test
          // convenience: the apply route broadcasts the lane so the cached row
          // stops disagreeing with what was just written. Drop the broadcast
          // server-side and the next lane switch re-reads a stale profile.
          const row = h.lanes.find((l) => l.id === id);
          if (row) row.router_profile = profile === "native" ? null : profile;
          return { tool: "claude", file: `/workspace/${id}/.claude/settings.local.json`, profile };
        }),
        features: { list: vi.fn().mockResolvedValue({ features: [] }), show: vi.fn() },
        proof: {
          list: vi.fn().mockResolvedValue({ features: [] }),
          imageUrl: vi.fn(),
          delete: vi.fn(),
        },
      },
      aiRouters: {
        list: vi.fn().mockImplementation(async () => ({ items: h.profiles })),
      },
      run: {
        list: vi.fn().mockResolvedValue({ runs: [], items: [] }),
        history: vi.fn().mockResolvedValue({ items: [] }),
        binary: vi.fn().mockResolvedValue({ found: true, path: "/usr/bin/claude" }),
        cwds: vi.fn().mockResolvedValue({ items: [] }),
        files: vi.fn().mockResolvedValue({ items: [] }),
        start: vi.fn(),
        get: vi.fn(),
        send: vi.fn(),
        kill: vi.fn(),
      },
      ccConfig: {
        commands: vi.fn().mockResolvedValue({ items: [] }),
        plugins: vi.fn().mockResolvedValue({ plugins: [] }),
        file: vi.fn().mockResolvedValue({ text: "", content: "" }),
      },
      sessions: {
        list: vi.fn().mockResolvedValue({ sessions: [], total: 0, limit: 50, offset: 0 }),
        transcript: vi.fn().mockResolvedValue({ messages: [] }),
      },
    },
  };
});

vi.mock("../../lib/eventBus", () => ({
  eventBus: {
    subscribe: () => () => {},
    publish: () => {},
    onConnection: () => () => {},
    connected: true,
    setConnected: () => {},
  },
}));

vi.mock("../../components/run/TerminalView", () => ({
  TerminalView: ({ runId }: { runId: string }) => (
    <div data-testid="terminal-view" data-run-id={runId} />
  ),
}));

import { Workspace } from "../Workspace";

class ObserverStub {
  observe() {}
  unobserve() {}
  disconnect() {}
  takeRecords() {
    return [];
  }
}

globalThis.ResizeObserver =
  globalThis.ResizeObserver || (ObserverStub as unknown as typeof ResizeObserver);
for (const fn of ["scrollIntoView", "scrollBy", "scrollTo"] as const) {
  if (!(Element.prototype as unknown as Record<string, unknown>)[fn]) {
    (Element.prototype as unknown as Record<string, unknown>)[fn] = function () {};
  }
}

async function settle() {
  await act(async () => {
    await new Promise((r) => setTimeout(r, 0));
    await new Promise((r) => setTimeout(r, 0));
  });
}

beforeEach(() => {
  routerApply.mockClear();
  lanesToReturn = [lane(1, "Lane A"), lane(2, "Lane B")];
  h.lanes = lanesToReturn as unknown as typeof h.lanes;
});

async function renderWorkspace() {
  const utils = render(
    <MemoryRouter initialEntries={["/run"]}>
      <Workspace />
    </MemoryRouter>
  );
  await settle();
  await settle();
  await settle();
  return utils;
}

/** Click the strip tile for a lane, which is how a lane is selected. */
async function selectLane(user: ReturnType<typeof userEvent.setup>, title: string) {
  const tile = screen.getAllByText(title)[0];
  if (!tile) throw new Error(`no strip tile for ${title}`);
  await user.click(tile);
  await settle();
}

describe("Workspace — the lane Model picker across a lane switch", () => {
  it("leaves a lane on native after another lane was pointed at a router", async () => {
    await renderWorkspace();
    const user = userEvent.setup();

    await selectLane(user, "Lane A");
    expect(await screen.findByDisplayValue("Native (Claude)")).toBeInTheDocument();

    await selectLane(user, "Lane B");
    await user.selectOptions(screen.getByDisplayValue("Native (Claude)"), ["9router"]);
    await waitFor(() => expect(routerApply).toHaveBeenCalledWith(2, "9router"));
    await settle();
    expect(screen.getByDisplayValue("9Router")).toBeInTheDocument();

    // Back to the lane that was never switched. It is still native server-side,
    // so the picker must say so — the row is one instance shared by every lane.
    await selectLane(user, "Lane A");
    expect(screen.getByDisplayValue("Native (Claude)")).toBeInTheDocument();
    // And nothing may have been written to lane A on the way.
    expect(routerApply).not.toHaveBeenCalledWith(1, expect.anything());
  });
});