/**
 * @file LaneConsolePane.test.tsx
 * @description Test suite for the LaneConsolePane component
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, it, expect, vi, beforeEach } from "vitest";
import { render, screen, fireEvent, waitFor } from "@testing-library/react";
import { MemoryRouter } from "react-router-dom";
import { LaneConsolePane } from "../LaneConsolePane";
import { api } from "../../../lib/api";
import type { Lane } from "../../../lib/types";

vi.mock("../TerminalView", () => ({
  // The exit button stands in for the server's `exit` frame (a double Ctrl+C
  // out of claude), which the real TerminalView reports through `onExit`.
  TerminalView: ({ runId, onExit }: { runId: string; onExit?: () => void }) => (
    <div data-testid="terminal-view" data-run-id={runId}>
      <button data-testid="fake-pane-exit" onClick={() => onExit?.()} />
    </div>
  ),
}));

vi.mock("../../../lib/api", () => ({
  api: {
    lanes: {
      ensure: vi.fn(),
      action: vi.fn(),
      list: vi.fn(),
    },
    run: {
      list: vi.fn().mockResolvedValue({ items: [] }),
      history: vi.fn().mockResolvedValue({ items: [] }),
      get: vi.fn(),
      start: vi.fn(),
    },
  },
  RUN_MODEL_CHOICES: [],
  RUN_MODEL_CHOICES_CODEX: [],
  RUN_EFFORT_CHOICES: [],
}));

const LANE: Lane = {
  id: 1,
  router_profile: null,
  title: "demo",
  cwd: "/workspace/a",
  branch: null,
  kind: "adopted",
  tool: "claude",
  source_repo: null,
  pipeline: "default",
  session_id: null,
  run_id: null,
  stage: "idle",
  stage_since: null,
  status: "idle",
  gate_decision: null,
  ci_status: null,
  needs_action: null,
  links: {},
  stages: {},
  notes: null,
  pipeline_name: "Default",
  pipeline_nodes: [],
  progress: 0,
  stage_seconds: null,
  last_event_seconds: null,
  liveness: "idle" as Lane["liveness"],
  detected_stage: null,
  detected_signal: null,
  slot: null,
  ports: {},
  active_feature_id: null,
};

function baseProps() {
  return {
    lanes: [LANE],
    laneId: 1,
    showLaneSelector: false,
    onLaneIdChange: vi.fn(),
    onLaneCreated: vi.fn(),
    binaryStatus: {
      claude: { found: true, path: "/usr/local/bin/claude" },
      codex: { found: true, path: "/usr/local/bin/codex" },
    },
    cwdSuggestions: [],
    activeRuns: { items: [] },
    wsConnected: true,
  };
}

describe("LaneConsolePane", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("starts a run through /api/lanes/<id>/start, not /api/run/start", async () => {
    (api.lanes.action as ReturnType<typeof vi.fn>).mockResolvedValue({
      lane: { ...LANE, run_id: "run-1" },
    });
    (api.run.get as ReturnType<typeof vi.fn>).mockResolvedValue({
      id: "run-1",
      laneId: 1,
      status: "running",
      cwd: "/workspace/a",
      model: null,
      permissionMode: null,
      effort: null,
      resumeSessionId: null,
      sessionId: null,
      startedAt: null,
      promptPreview: null,
    });

    render(<LaneConsolePane {...baseProps()} />);

    // Set cwd and prompt
    const cwdInput = screen.getByPlaceholderText(/type to search/i);
    fireEvent.change(cwdInput, { target: { value: "/workspace/a" } });

    const promptTextarea = screen.getByPlaceholderText(/ask claude/i);
    fireEvent.change(promptTextarea, { target: { value: "test prompt" } });

    // Find and click the Run button (the main start button in RunSetup)
    fireEvent.click(screen.getByRole("button", { name: /^run$/i }));

    await waitFor(() =>
      expect(api.lanes.action).toHaveBeenCalledWith(1, "start", expect.any(Object))
    );
    expect(api.run.start).not.toHaveBeenCalled();
    await waitFor(() =>
      expect(screen.getByTestId("terminal-view")).toHaveAttribute("data-run-id", "run-1")
    );
  });

  it("returns to the setup form when the pane exits, without a New run click", async () => {
    (api.lanes.action as ReturnType<typeof vi.fn>).mockResolvedValue({
      lane: { ...LANE, run_id: "run-1" },
    });
    (api.run.get as ReturnType<typeof vi.fn>).mockResolvedValue({
      id: "run-1",
      laneId: 1,
      status: "running",
      cwd: "/workspace/a",
      model: null,
      permissionMode: null,
      effort: null,
      resumeSessionId: null,
      sessionId: null,
      startedAt: null,
      promptPreview: null,
    });

    render(<LaneConsolePane {...baseProps()} />);
    fireEvent.change(screen.getByPlaceholderText(/ask claude/i), { target: { value: "go" } });
    fireEvent.click(screen.getByRole("button", { name: /^run$/i }));
    await screen.findByTestId("terminal-view");

    fireEvent.click(screen.getByTestId("fake-pane-exit"));

    await waitFor(() => expect(screen.queryByTestId("terminal-view")).not.toBeInTheDocument());
    expect(screen.getByPlaceholderText(/ask claude/i)).toBeInTheDocument();
  });

  it("swaps to the newly selected lane's own terminal instead of keeping the old one", async () => {
    const LANE2: Lane = { ...LANE, id: 2, title: "other", cwd: "/workspace/b" };
    const run = (id: string, laneId: number) => ({
      id,
      laneId,
      status: "running" as const,
      cwd: null,
      model: null,
      permissionMode: null,
      effort: null,
      resumeSessionId: null,
      sessionId: null,
      startedAt: null,
      promptPreview: null,
      tool: "claude" as const,
    });
    const props = {
      ...baseProps(),
      lanes: [LANE, LANE2],
      activeRuns: { items: [run("agenthub-lane-1", 1), run("agenthub-lane-2", 2)] },
    };

    const { rerender } = render(<LaneConsolePane {...props} />);
    await waitFor(() =>
      expect(screen.getByTestId("terminal-view")).toHaveAttribute("data-run-id", "agenthub-lane-1")
    );

    rerender(<LaneConsolePane {...props} laneId={2} />);
    await waitFor(() =>
      expect(screen.getByTestId("terminal-view")).toHaveAttribute("data-run-id", "agenthub-lane-2")
    );

    // A lane with no live run falls back to its setup form, not the previous
    // lane's terminal.
    rerender(<LaneConsolePane {...props} lanes={[LANE, LANE2, { ...LANE, id: 3 }]} laneId={3} />);
    await waitFor(() => expect(screen.queryByTestId("terminal-view")).not.toBeInTheDocument());
  });

  it("adopts the lane's cwd when the lane list arrives after the pane mounted", async () => {
    // Split view restores its pane lanes from localStorage, so a pane can
    // render with a laneId before GET /api/lanes has answered. laneId never
    // changes afterwards — only the resolved lane does.
    const props = { ...baseProps(), lanes: [], defaultCwd: "/home/tester" };
    const { rerender } = render(<LaneConsolePane {...props} />);
    const cwdInput = screen.getByPlaceholderText(/type to search/i) as HTMLInputElement;
    expect(cwdInput.value).toBe("/home/tester");

    rerender(<LaneConsolePane {...props} lanes={[LANE]} />);
    await waitFor(() => expect(cwdInput.value).toBe(LANE.cwd));
  });

  it("shows a lane dropdown only when showLaneSelector is true", () => {
    const { rerender } = render(<LaneConsolePane {...baseProps()} showLaneSelector />);
    expect(screen.getByTestId("pane-lane-select")).toBeInTheDocument();

    rerender(<LaneConsolePane {...baseProps()} showLaneSelector={false} />);
    expect(screen.queryByTestId("pane-lane-select")).not.toBeInTheDocument();
  });

  it("renders RunSetup when laneId is null and showLaneSelector is false (layout-1, fresh install)", () => {
    render(<LaneConsolePane {...baseProps()} laneId={null} showLaneSelector={false} />);
    expect(screen.getByTestId("console-body")).toBeInTheDocument();
    expect(screen.queryByTestId("pane-empty")).not.toBeInTheDocument();
  });

  it("never pre-fills the prompt from the lane's pipeline, for either tool", async () => {
    // Picking a pipeline used to write its driving slash command (claude) or a
    // stage checklist (codex) into the box — an extra prompt sent on start.
    const claudeLane = { ...LANE, pipeline_skill: "/agenthub:ship-feature" };
    const codexLane = {
      ...LANE,
      tool: "codex" as const,
      pipeline_skill: "/agenthub:ship-feature-lane",
      pipeline_nodes: [
        {
          id: "implement",
          label: "Implement",
          icon: "code",
          gate: false,
          state: "pending" as const,
        },
        { id: "tests", label: "Tests", icon: "check", gate: false, state: "pending" as const },
      ],
    };
    const props = { ...baseProps(), lanes: [claudeLane] };
    const { rerender } = render(<LaneConsolePane {...props} />);
    const prompt = screen.getByPlaceholderText(/ask claude/i) as HTMLTextAreaElement;
    await waitFor(() => expect(prompt.value).toBe(""));

    // A typed requirement still survives a template switch.
    fireEvent.change(prompt, { target: { value: "add a button" } });
    rerender(
      <LaneConsolePane
        {...props}
        lanes={[{ ...claudeLane, pipeline_skill: "/agenthub:ship-feature-lane" }]}
      />
    );
    await waitFor(() => expect(prompt.value).toBe("add a button"));

    rerender(<LaneConsolePane {...props} lanes={[codexLane]} />);
    await waitFor(() => expect(prompt.value).toBe("add a button"));
  });

  it("attaches to the lane's still-live session instead of failing when Resume hits ERUNLIVE", async () => {
    const HISTORY_ITEM = {
      id: "run-old",
      session_id: "sess-old",
      cwd: "/workspace/a",
      model: null,
      permission_mode: null,
      effort: null,
      resume_session_id: null,
      prompt_preview: "earlier prompt",
      status: "abandoned" as const,
      exit_code: null,
      started_at: new Date(1000).toISOString(),
      ended_at: new Date(2000).toISOString(),
      isLive: false,
      tool: "claude" as const,
    };
    (api.run.history as ReturnType<typeof vi.fn>).mockResolvedValue({ items: [HISTORY_ITEM] });
    (api.lanes.action as ReturnType<typeof vi.fn>).mockRejectedValue(
      // Matches the real shape `request()` throws: a plain, human-readable
      // `.message` plus a `.code` a caller actually branches on.
      Object.assign(new Error("lane already has a live run"), { code: "ERUNLIVE", status: 409 })
    );
    (api.lanes.list as ReturnType<typeof vi.fn>).mockResolvedValue({
      lanes: [{ ...LANE, run_id: "run-live" }],
    });
    (api.run.get as ReturnType<typeof vi.fn>).mockResolvedValue({
      id: "run-live",
      laneId: 1,
      status: "running",
      cwd: "/workspace/a",
      model: null,
      permissionMode: null,
      effort: null,
      resumeSessionId: null,
      sessionId: null,
      startedAt: null,
      promptPreview: null,
    });

    render(
      <MemoryRouter>
        <LaneConsolePane {...baseProps()} />
      </MemoryRouter>
    );

    fireEvent.click(await screen.findByRole("button", { name: /active runs/i }));
    const resumeButtons = await screen.findAllByRole("button", {
      name: "Resume existing session",
    });
    fireEvent.click(resumeButtons[0]!);

    await waitFor(() =>
      expect(screen.getByTestId("terminal-view")).toHaveAttribute("data-run-id", "run-live")
    );
    expect(screen.getByText(/attached to it instead/i)).toBeInTheDocument();
  });

  it("renders an empty placeholder with selector when laneId is null but showLaneSelector is true (split-view)", () => {
    render(<LaneConsolePane {...baseProps()} laneId={null} showLaneSelector={true} />);
    expect(screen.getByTestId("pane-empty")).toBeInTheDocument();
    expect(screen.getByTestId("pane-lane-select")).toBeInTheDocument();
    expect(screen.queryByTestId("console-body")).not.toBeInTheDocument();
  });

  it("lists only this lane's runs and sessions in Active runs, not every lane's", () => {
    const run = (id: string, laneId: number, promptPreview: string) => ({
      id,
      laneId,
      status: "running",
      cwd: "/workspace/x",
      model: null,
      permissionMode: null,
      effort: null,
      resumeSessionId: null,
      sessionId: null,
      startedAt: "2026-09-24T01:00:00Z",
      promptPreview,
    });
    const session = (id: string, cwd: string, name: string) =>
      ({
        id,
        cwd,
        name,
        model: null,
        source: "local",
        started_at: "2026-09-24T01:00:00Z",
      }) as never;
    render(
      <MemoryRouter>
        <LaneConsolePane
          {...baseProps()}
          lanes={[
            LANE,
            { ...LANE, id: 2, cwd: "/workspace/b" },
            // Nested inside lane 1: its sessions are ITS own, by longest prefix.
            { ...LANE, id: 3, cwd: "/workspace/a/nested" },
          ]}
          activeRuns={{ items: [run("r1", 1, "mine"), run("r2", 2, "other lane's")] as never }}
          externalSessions={[
            session("s1", "/workspace/a/src", "my session"),
            session("s2", "/workspace/b", "b session"),
            session("s3", "/workspace/a/nested/x", "nested session"),
            session("s4", "/workspace/ab", "sibling prefix"),
          ]}
        />
      </MemoryRouter>
    );
    fireEvent.click(screen.getByRole("button", { name: /2 active runs/ }));
    expect(screen.getByText("mine")).toBeTruthy();
    expect(screen.getByText("my session")).toBeTruthy();
    expect(screen.queryByText("other lane's")).toBeNull();
    expect(screen.queryByText("b session")).toBeNull();
    expect(screen.queryByText("nested session")).toBeNull();
    expect(screen.queryByText("sibling prefix")).toBeNull();
  });
});