import { type Locator, type Page } from "@playwright/test";
import { test, expect } from "../../fixtures/test-base";
import type { SeedData } from "../../fixtures/test-base";
import type { ApiClient } from "../../helpers/api-client";
import { typeWhileBusy, waitForComposerQueueMode } from "../../helpers/type-while-busy";
import { SessionPage } from "../../pages/session-page";
import { seedRunningGeneratingSession } from "../../helpers/generating-session";
import { expectFullQueueScrolls, seedFullQueueTask } from "./message-queue-scroll-helpers";
import { waitForQuickChatComposerReady } from "./quick-chat-helpers";
import { expectSendNowWorkflowRunning } from "./message-queue-workflow-helpers";
import {
  registerSeparateQueueRows,
  requestMessageQueueSettings,
} from "../../helpers/message-queue-settings";

registerSeparateQueueRows(test);

test("Send Now keeps a workflow transition running", async ({ testPage, apiClient, seedData }) => {
  await expectSendNowWorkflowRunning(testPage, apiClient, seedData, false);
});

// ---------------------------------------------------------------------------
// Quick Chat queue tests
// ---------------------------------------------------------------------------

/**
 * Open the collapsed queue panel by clicking the floating chip. The chip
 * appears above the chat input once at least one message is queued; the
 * panel only mounts after a click (collapsed by default).
 */
async function openQueuePanel(scope: Locator | Page): Promise<void> {
  const chip = scope.getByTestId("queue-chip");
  await expect(chip).toBeVisible({ timeout: 10_000 });
  await chip.click();
  await expect(scope.getByTestId("queued-ghost-list")).toBeVisible({ timeout: 5_000 });
}

async function openQuickChatWithAgent(page: Page): Promise<Locator> {
  await page.goto("/");
  await page.waitForLoadState("networkidle");

  const modifier = process.platform === "darwin" ? "Meta" : "Control";
  await page.keyboard.press(`${modifier}+Shift+q`);

  const dialog = page.getByRole("dialog", { name: "Quick Chat" });
  await expect(dialog).toBeVisible({ timeout: 10_000 });

  const setup = dialog.getByTestId("quick-chat-setup");
  if (!(await setup.isVisible({ timeout: 1_000 }).catch(() => false))) {
    await dialog.getByTestId("quick-chat-add-menu-trigger").click();
    await page.getByTestId("quick-chat-new-agent").click();
  }
  await expect(setup).toBeVisible({ timeout: 5_000 });

  const agentSelector = dialog.getByTestId("agent-profile-selector");
  if (
    await agentSelector
      .getByText("Select agent", { exact: false })
      .isVisible()
      .catch(() => false)
  ) {
    await agentSelector.click();
    await page.getByRole("option").first().click();
  }
  await dialog.getByTestId("quick-chat-start").click();

  await waitForQuickChatComposerReady(dialog);
  return dialog;
}

test.describe("Quick chat queue", () => {
  // Allow 1 retry: the test can be flaky when a previous test cycle's agent process hasn't
  // fully shut down, causing the new session to conflict with a stale execution.
  test.describe.configure({ retries: 1 });

  test("queued message indicator appears and message executes after agent turn", async ({
    testPage,
  }) => {
    test.setTimeout(60_000);

    const dialog = await openQuickChatWithAgent(testPage);

    // Send a slow command so the agent stays busy for 10 seconds.
    const editor = dialog.locator(".tiptap.ProseMirror");
    await typeWhileBusy(testPage, editor, "/slow 10s");
    const modifier = process.platform === "darwin" ? "Meta" : "Control";
    await editor.press(`${modifier}+Enter`);

    // Wait for agent to become busy.
    await expect(testPage.getByRole("status", { name: /Agent is (starting|running)/ })).toBeVisible(
      {
        timeout: 15_000,
      },
    );
    await waitForComposerQueueMode(dialog);

    await typeWhileBusy(testPage, editor, "hello world");
    await testPage.keyboard.press(`${modifier}+Enter`);

    // Collapsed-by-default chip is the new queued-message indicator.
    const chip = dialog.getByTestId("queue-chip");
    await expect(chip).toBeVisible({ timeout: 10_000 });
    // The chip is only rendered while the queue panel is collapsed, so its
    // mere presence implies the closed state — no data-open assertion needed.

    // Wait for the first (slow) response to complete.
    await expect(dialog.getByText("Slow response complete", { exact: false })).toBeVisible({
      timeout: 30_000,
    });

    // The queued message should auto-execute — wait for the agent turn to finish.
    await expect(
      dialog.locator('[data-placeholder="Continue working on the task..."]'),
    ).toBeVisible({
      timeout: 30_000,
    });
  });

  test("queue message via submit button click", async ({ testPage }) => {
    test.setTimeout(90_000);

    const dialog = await openQuickChatWithAgent(testPage);

    // Send a slow command so the agent stays busy for 10 seconds.
    const editor = dialog.locator(".tiptap.ProseMirror");
    await typeWhileBusy(testPage, editor, "/slow 10s");
    const modifier = process.platform === "darwin" ? "Meta" : "Control";
    await editor.press(`${modifier}+Enter`);

    // Wait for agent to become busy.
    await expect(testPage.getByRole("status", { name: /Agent is (starting|running)/ })).toBeVisible(
      {
        timeout: 15_000,
      },
    );
    await waitForComposerQueueMode(dialog);

    // Before typing, only the cancel button should be visible (no send button).
    const submitBtn = dialog.getByTestId("submit-message-button");
    await expect(submitBtn).not.toBeVisible();
    await expect(dialog.getByTestId("cancel-agent-button")).toBeVisible();

    // Type a queued message — the submit button should appear.
    await typeWhileBusy(testPage, editor, "queued via button");
    await expect(submitBtn).toBeVisible({ timeout: 5_000 });

    // Click the submit button (not keyboard shortcut) to queue the message.
    await submitBtn.click();

    // Verify the collapsed chip appears as the queued-message indicator.
    await expect(dialog.getByTestId("queue-chip")).toBeVisible({ timeout: 10_000 });

    // Verify the cancel-agent button is also visible alongside submit.
    const cancelAgentBtn = dialog.getByTestId("cancel-agent-button");
    await expect(cancelAgentBtn).toBeVisible();

    // Wait for the first (slow) response to complete and queued message to auto-execute.
    await expect(
      dialog.locator('[data-placeholder="Continue working on the task..."]'),
    ).toBeVisible({
      timeout: 60_000,
    });
  });
});

// ---------------------------------------------------------------------------
// Task session queue tests
// ---------------------------------------------------------------------------

async function seedTaskAndWaitForIdle(
  testPage: Page,
  apiClient: ApiClient,
  seedData: SeedData,
  title: string,
  description = "/e2e:simple-message",
): Promise<SessionPage> {
  const task = await apiClient.createTaskWithAgent(
    seedData.workspaceId,
    title,
    seedData.agentProfileId,
    {
      description,
      workflow_id: seedData.workflowId,
      workflow_step_id: seedData.startStepId,
      repository_ids: [seedData.repositoryId],
    },
  );

  await testPage.goto(`/t/${task.id}`);

  const session = new SessionPage(testPage);
  await session.waitForLoad();
  await session.waitForChatIdle({ timeout: 30_000 });

  return session;
}

async function queueMessages(
  apiClient: ApiClient,
  taskId: string,
  sessionId: string,
  messages: string[],
): Promise<void> {
  const identity = await apiClient.getQueueSessionIdentity(taskId, sessionId);
  for (const message of messages) {
    await apiClient.queueMessage(identity, message);
  }
}

function scriptedQueueMessage(marker: string, delayMs = 250): string {
  return `e2e:delay(${delayMs})\ne2e:message("${marker}")`;
}

async function expectSeparateTurnsInOrder(scope: Locator, markers: string[]): Promise<void> {
  const agentBodies = scope.locator("[data-agent-message-body][data-message-id]");
  for (const marker of markers) {
    await expect(agentBodies.filter({ hasText: marker })).toHaveCount(1, { timeout: 45_000 });
  }

  const agentTexts = await agentBodies.allTextContents();
  const agentIndexes = markers.map((marker) =>
    agentTexts.findIndex((text) => text.includes(marker)),
  );
  expect(agentIndexes.every((index) => index >= 0)).toBe(true);
  expect(agentIndexes).toEqual([...agentIndexes].sort((a, b) => a - b));

  const userTexts = await scope.getByTestId("user-message-bubble").allTextContents();
  const userIndexes = markers.map((marker) => userTexts.findIndex((text) => text.includes(marker)));
  expect(userIndexes.every((index) => index >= 0)).toBe(true);
  expect(new Set(userIndexes).size).toBe(markers.length);
  expect(userIndexes).toEqual([...userIndexes].sort((a, b) => a - b));
}

test.describe("Task session queue", () => {
  test.describe.configure({ retries: 1 });

  test("full queue scrolls internally without hiding the composer", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    const { session } = await seedFullQueueTask(
      testPage,
      apiClient,
      seedData,
      "Desktop full queue scrolling",
    );

    await expectFullQueueScrolls(session);
  });

  test("automatic merge compacts compatible user rows and disabled mode keeps them separate", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    const task = await apiClient.createTask(seedData.workspaceId, "Automatic queue merge", {
      workflow_id: seedData.workflowId,
      workflow_step_id: seedData.startStepId,
      repository_ids: [seedData.repositoryId],
    });
    const { session_id: sessionId } = await apiClient.seedTaskSession(task.id, {
      state: "RUNNING",
      agentProfileId: seedData.agentProfileId,
    });
    const queueIdentity = await apiClient.getQueueSessionIdentity(task.id, sessionId);
    await requestMessageQueueSettings(apiClient, "PATCH", { auto_merge_enabled: true });

    await apiClient.queueMessage(queueIdentity, "automatic first");
    await apiClient.queueMessage(queueIdentity, "automatic second");
    await testPage.goto(`/t/${task.id}`);
    const session = new SessionPage(testPage);
    await session.waitForLoad();
    await openQueuePanel(session.activeChat());
    const panel = session.activeChat().getByTestId("queued-ghost-list");
    const entries = panel.getByTestId("queue-entry-text");
    await expect(entries).toHaveCount(1);
    const autoMerge = panel.getByTestId("queue-auto-merge");
    await expect(autoMerge).toHaveAttribute("data-state", "checked");
    await autoMerge.click();
    await expect(autoMerge).toHaveAttribute("data-state", "unchecked");

    await expect(entries.first()).toContainText("automatic first");
    await expect(entries.first()).toContainText("automatic second");

    await requestMessageQueueSettings(apiClient, "PATCH", { auto_merge_enabled: false });
    await requestMessageQueueSettings(apiClient, "PATCH", { auto_merge_enabled: true });
    await expect(autoMerge).toHaveAttribute("data-state", "unchecked");
    await apiClient.queueMessage(queueIdentity, "separate third");
    await apiClient.queueMessage(queueIdentity, "separate fourth");
    await expect(entries).toHaveCount(3, { timeout: 10_000 });
    await expect(entries.nth(1)).toHaveText("separate third");
    await expect(entries.nth(2)).toHaveText("separate fourth");
  });

  test("automatic merge accepts a compatible message into a full queue", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    const { taskId, sessionId, session } = await seedFullQueueTask(
      testPage,
      apiClient,
      seedData,
      "Full queue auto merge",
    );

    // The queue is at capacity (10 separate rows, auto-merge off per spec
    // isolation). Enabling automatic merge must fold the next compatible
    // message into the tail instead of rejecting it as "queue full".
    await requestMessageQueueSettings(apiClient, "PATCH", { auto_merge_enabled: true });
    const queueIdentity = await apiClient.getQueueSessionIdentity(taskId, sessionId);
    await apiClient.queueMessage(queueIdentity, "folded while full");

    const chat = session.activeChat();
    const chip = chat.getByTestId("queue-chip");
    await expect(chip).toBeVisible({ timeout: 10_000 });
    await chip.click();
    const panel = chat.getByTestId("queued-ghost-list");
    const entries = panel.getByTestId("queue-entry-text");
    await expect(entries).toHaveCount(10);
    await expect(entries.last()).toContainText("Queued item 10");
    await expect(entries.last()).toContainText("folded while full");
  });

  test("queue message via submit button on task session page", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    test.setTimeout(90_000);

    const session = await seedTaskAndWaitForIdle(
      testPage,
      apiClient,
      seedData,
      "Queue button test",
    );

    // Send a slow command to keep the agent busy.
    await session.sendMessage("/slow 5s");
    await expect(session.agentStatus()).toBeVisible({ timeout: 15_000 });
    await waitForComposerQueueMode(testPage);

    // Type a message while agent is busy.
    const editor = testPage.locator(".tiptap.ProseMirror").first();
    await typeWhileBusy(testPage, editor, "queued via button");

    // Both submit and cancel-agent buttons should be visible.
    const submitBtn = testPage.getByTestId("submit-message-button");
    const cancelAgentBtn = testPage.getByTestId("cancel-agent-button");
    await expect(submitBtn).toBeVisible({ timeout: 5_000 });
    await expect(cancelAgentBtn).toBeVisible();

    // Click the submit button to queue the message.
    await submitBtn.click();

    // Collapsed chip is the queued-message indicator on the task session page.
    await expect(testPage.getByTestId("queue-chip")).toBeVisible({ timeout: 10_000 });

    // Expand once so we can verify the per-entry Remove control is present.
    await openQueuePanel(testPage);
    await expect(testPage.getByTitle("Remove queued message")).toBeVisible({ timeout: 5_000 });

    // Wait for the queued message to auto-execute and agent to become idle.
    await expect(session.idleInput()).toBeVisible({ timeout: 30_000 });
  });

  test("Send Now resumes Auto-run with the selected row first", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    test.setTimeout(120_000);

    const session = await seedTaskAndWaitForIdle(
      testPage,
      apiClient,
      seedData,
      "Queue Send Now row test",
    );
    await session.sendMessage("/slow 30s");
    await expect(session.agentStatus()).toBeVisible({ timeout: 15_000 });
    await expect(session.chat.getByText("Running slow response (30s total)...")).toBeVisible({
      timeout: 15_000,
    });
    const taskID = new URL(testPage.url()).pathname.split("/").pop();
    if (!taskID) throw new Error("task URL did not contain a task ID");
    const workflowStepBefore = (await apiClient.getTask(taskID)).workflow_step_id;

    const markerA = "targeted A response";
    const markerB = "targeted B response";
    const markerC = "targeted C response";
    const task = await apiClient.getTask(taskID);
    const sessionID = task.primary_session_id;
    if (!sessionID) throw new Error("task did not have a primary session");
    await queueMessages(apiClient, taskID, sessionID, [
      scriptedQueueMessage(markerA),
      scriptedQueueMessage(markerB, 5_000),
      scriptedQueueMessage(markerC),
    ]);

    await openQueuePanel(testPage);
    const panel = testPage.getByTestId("queued-ghost-list");
    await expect(panel.getByTestId("queue-entry-text")).toHaveCount(3);
    const autoRun = panel.getByTestId("queue-auto-run");
    await expect(autoRun).toHaveAttribute("data-state", "checked");
    await autoRun.click();
    await expect(autoRun).toHaveAttribute("data-state", "unchecked");

    const target = panel.getByTestId("queue-entry").filter({ hasText: markerB });
    await expect(target).toBeVisible();
    await target.hover();
    const sendNow = target.getByTestId("queue-entry-send-now");
    await expect(sendNow).toBeVisible({ timeout: 10_000 });
    await expect(sendNow).toBeEnabled({ timeout: 10_000 });
    await sendNow.click();

    await expect(panel.getByTestId("queue-entry-text")).toHaveCount(2, { timeout: 10_000 });
    await expect(panel.getByTestId("queue-entry-text").nth(0)).toContainText(markerA);
    await expect(panel.getByTestId("queue-entry-text").nth(1)).toContainText(markerC);
    await expect(autoRun).toHaveAttribute("data-state", "checked", { timeout: 10_000 });

    // Send Now's internal interruption must not behave like an explicit user
    // cancellation. Check while the selected replacement turn is still active;
    // successful turn completion may legitimately advance the workflow later.
    await expect(
      session.chat.getByTestId("user-message-bubble").filter({ hasText: markerB }),
    ).toHaveCount(1, { timeout: 20_000 });
    await expect(session.agentStatus()).toBeVisible({ timeout: 20_000 });
    expect((await apiClient.getTask(taskID)).workflow_step_id).toBe(workflowStepBefore);

    await expectSeparateTurnsInOrder(session.chat, [markerB, markerA, markerC]);
    await session.waitForChatIdle({ timeout: 45_000 });
    await expect(panel).not.toBeVisible({ timeout: 15_000 });
    await expect(session.chat).not.toContainText("Turn cancelled by user");
  });

  test("Auto-run OFF finishes the current turn, survives reload, then resumes FIFO", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    test.setTimeout(120_000);

    const session = await seedTaskAndWaitForIdle(
      testPage,
      apiClient,
      seedData,
      "Queue Auto-run hold and resume",
    );
    await session.sendMessage("/slow 8s");
    await expect(session.agentStatus()).toBeVisible({ timeout: 15_000 });
    await waitForComposerQueueMode(testPage);

    const taskID = new URL(testPage.url()).pathname.split("/").pop();
    if (!taskID) throw new Error("task URL did not contain a task ID");
    const task = await apiClient.getTask(taskID);
    const sessionID = task.primary_session_id;
    if (!sessionID) throw new Error("task did not have a primary session");
    const markers = ["auto-run A response", "auto-run B response", "auto-run C response"];
    await queueMessages(
      apiClient,
      taskID,
      sessionID,
      markers.map((marker) => scriptedQueueMessage(marker)),
    );
    await openQueuePanel(testPage);
    let panel = testPage.getByTestId("queued-ghost-list");
    await expect(panel.getByTestId("queue-entry-text")).toHaveCount(3);
    let autoRun = panel.getByTestId("queue-auto-run");
    await expect(autoRun).toHaveAttribute("data-state", "checked");
    await autoRun.click();
    await expect(autoRun).toHaveAttribute("data-state", "unchecked");

    await expect(session.chat.getByText("Slow response complete", { exact: false })).toBeVisible({
      timeout: 30_000,
    });
    await expect(session.idleInput()).toBeVisible({ timeout: 30_000 });
    await expect(panel.getByTestId("queue-entry-text")).toHaveCount(3);
    await expect(autoRun).toHaveAttribute("data-state", "unchecked");

    await testPage.reload();
    await session.waitForLoad();
    await openQueuePanel(testPage);
    panel = testPage.getByTestId("queued-ghost-list");
    autoRun = panel.getByTestId("queue-auto-run");
    await expect(panel.getByTestId("queue-entry-text")).toHaveCount(3);
    await expect(autoRun).toHaveAttribute("data-state", "unchecked");

    await autoRun.click();
    await expectSeparateTurnsInOrder(session.chat, markers);
    await session.waitForChatIdle({ timeout: 45_000 });
    await expect(testPage.getByTestId("queue-chip")).not.toBeVisible({ timeout: 15_000 });
  });

  test("queue editor textarea scrolls when content is long", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    test.setTimeout(90_000);

    const session = await seedTaskAndWaitForIdle(
      testPage,
      apiClient,
      seedData,
      "Queue editor scroll test",
    );

    // Send a slow command to keep the agent busy.
    await session.sendMessage("/slow 10s");
    await expect(session.agentStatus()).toBeVisible({ timeout: 15_000 });
    await waitForComposerQueueMode(testPage);

    // Type a short message while agent is busy and queue it.
    const editor = testPage.locator(".tiptap.ProseMirror").first();
    await typeWhileBusy(testPage, editor, "short queued msg");

    const submitBtn = testPage.getByTestId("submit-message-button");
    await expect(submitBtn).toBeVisible({ timeout: 5_000 });
    await submitBtn.click();

    // Expand the collapsed queue panel to reveal the per-entry Edit affordance.
    await openQueuePanel(testPage);

    const editBtn = testPage.getByTitle("Edit queued message");
    await expect(editBtn).toBeVisible({ timeout: 10_000 });
    await editBtn.click();

    // The edit textarea should now be visible.
    const textarea = testPage.getByTestId("queue-edit-textarea");
    await expect(textarea).toBeVisible({ timeout: 5_000 });

    // Fill via native setter + React event so the controlled component updates.
    const longText = Array.from(
      { length: 30 },
      (_, i) => `Line ${i + 1} of scroll test content`,
    ).join("\n");
    await textarea.evaluate((el: HTMLTextAreaElement, text: string) => {
      const setter = Object.getOwnPropertyDescriptor(HTMLTextAreaElement.prototype, "value")!.set!;
      setter.call(el, text);
      el.dispatchEvent(new Event("input", { bubbles: true }));
      el.dispatchEvent(new Event("change", { bubbles: true }));
    }, longText);

    // Verify the textarea has a constrained max-height and is scrollable.
    // The auto-grow effect re-measures after React commits the new value, so
    // poll the metrics rather than sampling them once behind a fixed settle.
    await expect
      .poll(
        async () =>
          textarea.evaluate((el: HTMLTextAreaElement) => ({
            scrollable: el.scrollHeight > el.clientHeight,
            maxHeight: getComputedStyle(el).maxHeight,
            overflowY: getComputedStyle(el).overflowY,
          })),
        { timeout: 5_000 },
      )
      .toEqual({ scrollable: true, maxHeight: "200px", overflowY: "auto" });
  });

  test("merges a queued message into the message above it", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    test.setTimeout(90_000);

    const session = await seedTaskAndWaitForIdle(testPage, apiClient, seedData, "Queue merge test");

    // Send a slow command to keep the agent busy while we queue two messages.
    await session.sendMessage("/slow 10s");
    await expect(session.agentStatus()).toBeVisible({ timeout: 15_000 });
    await waitForComposerQueueMode(testPage);

    const editor = testPage.locator(".tiptap.ProseMirror").first();
    await typeWhileBusy(testPage, editor, "first message");
    const submitBtn = testPage.getByTestId("submit-message-button");
    await expect(submitBtn).toBeVisible({ timeout: 5_000 });
    await submitBtn.click();

    await typeWhileBusy(testPage, editor, "second message");
    await expect(submitBtn).toBeVisible({ timeout: 5_000 });
    await submitBtn.click();

    // Expand the queue panel; the second row offers the merge control.
    await openQueuePanel(testPage);
    const mergeButtons = testPage.getByTestId("queue-entry-merge");
    await expect(mergeButtons).toHaveCount(1, { timeout: 5_000 });
    await mergeButtons.click();

    // After the merge the queue holds a single entry whose text contains both
    // messages, and the panel header reflects one queued message.
    const entries = testPage.getByTestId("queue-entry-text");
    await expect(entries).toHaveCount(1, { timeout: 5_000 });
    await expect(entries.first()).toContainText("first message");
    await expect(entries.first()).toContainText("second message");
    await expect(testPage.getByTestId("queued-ghost-list")).toContainText(/1 of 10/);
  });

  test("queue message with plan mode enabled via submit button", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    test.setTimeout(90_000);

    const session = await seedTaskAndWaitForIdle(
      testPage,
      apiClient,
      seedData,
      "Queue plan mode test",
    );

    // Enable plan mode.
    await session.togglePlanMode();

    // Send a slow command to keep the agent busy.
    await session.sendMessage("/slow 5s");
    await expect(session.agentStatus()).toBeVisible({ timeout: 15_000 });
    await waitForComposerQueueMode(testPage);

    // In plan mode with no typed text, only the cancel button should be visible.
    // The auto-added plan context should NOT cause the send button to appear.
    const submitBtn = testPage.getByTestId("submit-message-button");
    await expect(submitBtn).not.toBeVisible();
    await expect(testPage.getByTestId("cancel-agent-button")).toBeVisible();

    // Type a message while agent is busy — send button should appear.
    const editor = testPage.locator(".tiptap.ProseMirror").first();
    await typeWhileBusy(testPage, editor, "plan queue test");
    await expect(submitBtn).toBeVisible({ timeout: 5_000 });

    // Click the submit button to queue the message.
    await submitBtn.click();

    // Expand the chip first; the panel is collapsed by default.
    await openQueuePanel(testPage);

    // Verify the queued ghost list shows clean text (no system tags).
    const queueIndicator = testPage.getByTestId("queued-ghost-list");
    await expect(queueIndicator).toBeVisible({ timeout: 10_000 });
    await expect(queueIndicator).not.toContainText("kandev-system");

    // Wait for agent to finish processing.
    await expect(session.planModeInput()).toBeVisible({ timeout: 30_000 });
  });
});

// ---------------------------------------------------------------------------
// Queue affordance — chip & panel behavior
// ---------------------------------------------------------------------------

test.describe("Queue affordance", () => {
  test.describe.configure({ retries: 1 });

  test("queue chip stays collapsed by default and toggles via panel close button", async ({
    testPage,
  }) => {
    test.setTimeout(90_000);

    const dialog = await openQuickChatWithAgent(testPage);

    // Send a slow command so the agent stays busy long enough to queue.
    const editor = dialog.locator(".tiptap.ProseMirror");
    await editor.click();
    await editor.fill("/slow 10s");
    const modifier = process.platform === "darwin" ? "Meta" : "Control";
    await editor.press(`${modifier}+Enter`);

    await expect(testPage.getByRole("status", { name: /Agent is (starting|running)/ })).toBeVisible(
      { timeout: 15_000 },
    );
    await waitForComposerQueueMode(dialog);

    await typeWhileBusy(testPage, editor, "first queued");
    await testPage.keyboard.press(`${modifier}+Enter`);

    // Chip is present and collapsed by default.
    const chip = dialog.getByTestId("queue-chip");
    await expect(chip).toBeVisible({ timeout: 10_000 });
    await expect(chip).toContainText("queued");
    await expect(dialog.getByTestId("queued-ghost-list")).not.toBeVisible();

    // Clicking the chip expands the panel; the chip itself unmounts because the
    // panel header carries the same affordance.
    await chip.click();
    await expect(dialog.getByTestId("queued-ghost-list")).toBeVisible({ timeout: 5_000 });
    await expect(dialog.getByTestId("queue-chip")).not.toBeVisible();

    // The panel header's X button collapses back to the chip.
    await dialog.getByTestId("queue-close").click();
    await expect(dialog.getByTestId("queued-ghost-list")).not.toBeVisible();
    await expect(dialog.getByTestId("queue-chip")).toBeVisible({ timeout: 5_000 });
  });

  test("Escape collapses an open queue panel", async ({ testPage }) => {
    test.setTimeout(90_000);

    const dialog = await openQuickChatWithAgent(testPage);

    const editor = dialog.locator(".tiptap.ProseMirror");
    await editor.click();
    await editor.fill("/slow 10s");
    const modifier = process.platform === "darwin" ? "Meta" : "Control";
    await editor.press(`${modifier}+Enter`);

    await expect(testPage.getByRole("status", { name: /Agent is (starting|running)/ })).toBeVisible(
      { timeout: 15_000 },
    );
    await waitForComposerQueueMode(dialog);

    await typeWhileBusy(testPage, editor, "queued for esc");
    await testPage.keyboard.press(`${modifier}+Enter`);

    await openQueuePanel(dialog);
    // Move focus out of the editor so Escape isn't swallowed by the textarea guard.
    await dialog.getByTestId("queue-close").focus();
    await testPage.keyboard.press("Escape");

    await expect(dialog.getByTestId("queued-ghost-list")).not.toBeVisible({ timeout: 5_000 });
    await expect(dialog.getByTestId("queue-chip")).toBeVisible({ timeout: 5_000 });
  });

  test("clear-all from the panel empties the queue and hides the chip", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    test.setTimeout(90_000);

    const session = await seedTaskAndWaitForIdle(
      testPage,
      apiClient,
      seedData,
      "Queue clear-all test",
    );

    await session.sendMessage("/slow 10s");
    await expect(session.agentStatus()).toBeVisible({ timeout: 15_000 });
    await waitForComposerQueueMode(testPage);

    const editor = testPage.locator(".tiptap.ProseMirror").first();
    await typeWhileBusy(testPage, editor, "to be cleared");
    const submitBtn = testPage.getByTestId("submit-message-button");
    await expect(submitBtn).toBeVisible({ timeout: 5_000 });
    await submitBtn.click();

    await openQueuePanel(testPage);
    await testPage.getByTestId("queue-clear-all").click();

    // Panel and chip both disappear once the queue is empty.
    await expect(testPage.getByTestId("queued-ghost-list")).not.toBeVisible({ timeout: 5_000 });
    await expect(testPage.getByTestId("queue-chip")).not.toBeVisible({ timeout: 5_000 });
  });
});

async function readQueuePreviewMetricsWithoutDisclosure(
  preview: Locator,
): Promise<{ clientHeight: number; scrollHeight: number }> {
  return preview.evaluate((element) => {
    const disclosure = element
      .closest('[data-testid="queue-entry"]')
      ?.querySelector<HTMLElement>('[data-testid="queue-entry-expand"]');
    const previousDisplay = disclosure?.style.display;
    try {
      if (disclosure) disclosure.style.display = "none";
      return {
        clientHeight: element.clientHeight,
        scrollHeight: element.scrollHeight,
      };
    } finally {
      if (disclosure) disclosure.style.display = previousDisplay ?? "";
    }
  });
}

test.describe("Queued row controls", () => {
  test.describe.configure({ timeout: 120_000 });

  // @covers AC-UI-MESSAGE-QUEUE-MANAGEMENT-001.9
  // @covers AC-UI-MESSAGE-QUEUE-MANAGEMENT-001.10
  test("adapts queued row controls to rendered overflow", async ({
    testPage,
    apiClient,
    seedData,
  }) => {
    const fixture = "adaptive-width-probe ".repeat(12).trim();
    await testPage.setViewportSize({ width: 1280, height: 900 });
    const { session, taskId, sessionId } = await seedRunningGeneratingSession(
      testPage,
      apiClient,
      seedData,
      "Adaptive queued row controls",
      { sleepSeconds: 60 },
    );
    await testPage.getByRole("button", { name: "Collapse sidebar" }).click();
    await expect(testPage.getByTestId("app-sidebar")).toHaveAttribute("data-collapsed", "true");
    const chatMaximize = testPage
      .locator(
        '.dv-groupview:has([data-testid^="session-tab-"]) .dv-tabs-and-actions-container [data-testid="dockview-maximize-btn"]',
      )
      .first();
    await expect(chatMaximize).toBeVisible();
    await chatMaximize.click();
    const identity = await apiClient.getQueueSessionIdentity(taskId, sessionId);
    const autoRunResponse = await apiClient.setQueueAutoRun(identity, false);
    expect(autoRunResponse).toMatchObject({ session_id: sessionId, auto_run: false });
    await waitForComposerQueueMode(testPage);
    await apiClient.queueMessage(identity, fixture);
    await expect
      .poll(() => apiClient.getQueueStatus(identity))
      .toMatchObject({ count: 1, auto_run: false });

    const chat = session.activeChat();
    await chat.getByTestId("queue-chip").click();
    const panel = chat.getByTestId("queued-ghost-list");
    const row = panel.getByTestId("queue-entry").filter({ hasText: fixture });
    const preview = row.getByTestId("queue-entry-text");
    const actions = row.getByTestId("queue-entry-actions");
    const remove = row.getByTestId("queue-entry-remove");
    await expect(row).toBeVisible();
    await expect
      .poll(async () => {
        const metrics = await readQueuePreviewMetricsWithoutDisclosure(preview);
        return metrics.scrollHeight === metrics.clientHeight;
      })
      .toBe(true);
    await expect(row.getByTestId("queue-entry-expand")).toHaveCount(0);

    await testPage.setViewportSize({ width: 800, height: 900 });
    await expect
      .poll(async () => {
        const metrics = await readQueuePreviewMetricsWithoutDisclosure(preview);
        return metrics.scrollHeight > metrics.clientHeight;
      })
      .toBe(true);
    const expand = row.getByTestId("queue-entry-expand");
    await expect(expand).toBeVisible();

    await testPage.mouse.move(0, 0);
    await expect(actions).toHaveCSS("opacity", "0");
    await row.hover();
    await expect(actions).toHaveCSS("opacity", "1");
    expect(await testPage.evaluate(() => matchMedia("(pointer: fine)").matches)).toBe(true);
    await expect(remove).toHaveAttribute("title", "Remove queued message");
    await expect(
      row.getByRole("button", { name: "Remove queued message", exact: true }),
    ).toHaveCount(1);
    await expect(remove.locator("svg")).toHaveClass(/tabler-icon-trash/);
    const order = await actions.evaluate((container) => {
      const direct = [...container.children] as HTMLElement[];
      const disclosure = direct.find((element) => element.dataset.testid === "queue-entry-expand");
      const terminal = direct.at(-1);
      return {
        adjacent: disclosure?.nextElementSibling === terminal,
        terminalTestId: (terminal as HTMLElement | undefined)?.dataset.testid,
      };
    });
    expect(order).toEqual({ adjacent: true, terminalTestId: "queue-entry-remove" });

    const colors = await remove.evaluate((button) => {
      const muted = document.createElement("span");
      muted.className = "text-muted-foreground";
      const destructive = document.createElement("span");
      destructive.className = "text-destructive";
      button.parentElement?.append(muted, destructive);
      const values = {
        muted: getComputedStyle(muted).color,
        destructive: getComputedStyle(destructive).color,
      };
      muted.remove();
      destructive.remove();
      return values;
    });
    await expect(remove).toHaveCSS("color", colors.muted);
    await remove.hover();
    await expect(remove).toHaveCSS("color", colors.destructive);

    await testPage.setViewportSize({ width: 1280, height: 900 });
    await expect
      .poll(async () => {
        const metrics = await readQueuePreviewMetricsWithoutDisclosure(preview);
        return metrics.scrollHeight === metrics.clientHeight;
      })
      .toBe(true);
    await expect(row.getByTestId("queue-entry-expand")).toHaveCount(0);

    await remove.click();
    await expect(row).toHaveCount(0);
  });
});