import { expect, test, type Locator, type Page } from "@playwright/test";

import { waitForAnimations } from "../helpers/animations";
import { installMockBridge } from "../helpers/bridge";

const SHOTS = "test-results/persistent-agent-audience";
const CHANNEL_ID = "9a1657ac-f7aa-5db0-b632-d8bbeb6dfb50";
const RANDOM_CHANNEL_ID = "9dae0116-799b-5071-a0a8-fdd30a91a35d";
const AGENT_A = "a".repeat(64);
const AGENT_B = "b".repeat(64);
const THREAD_ROOT_ID = "mock-general-welcome";
const KEEP_MENTIONED_AGENTS_PINNED_STORAGE_KEY =
  "buzz.messages.keepMentionedAgentsPinned";

test.beforeEach(async ({ page }) => {
  await page.addInitScript((storageKey) => {
    window.localStorage.removeItem(storageKey);
  }, KEEP_MENTIONED_AGENTS_PINNED_STORAGE_KEY);
});

async function keepMentionedAgentsPinned(page: Page) {
  await page.addInitScript((storageKey) => {
    window.localStorage.setItem(storageKey, "true");
  }, KEEP_MENTIONED_AGENTS_PINNED_STORAGE_KEY);
}

async function seedTheme(page: Page, theme: string, accent = "#c0a2f1") {
  await page.addInitScript(
    ({ selectedTheme, selectedAccent }) => {
      window.localStorage.setItem("buzz-theme", selectedTheme);
      window.localStorage.setItem("buzz-accent-color", selectedAccent);
    },
    { selectedTheme: theme, selectedAccent: accent },
  );
}

async function automaticallyMention(
  composer: ReturnType<typeof channelComposer>,
  displayName: string,
) {
  await composer.locator("[data-mention-picker-trigger]").click();
  await composer
    .getByTestId("mention-autocomplete")
    .getByRole("button", { name: `Automatically mention ${displayName}` })
    .click();
  await expect(composer.getByTestId("message-input")).toContainText(
    `@${displayName}`,
  );
  await composer.locator("[data-mention-picker-trigger]").click();
}

async function waitForMockLiveSubscription(page: Page, channelName: string) {
  await expect
    .poll(() =>
      page.evaluate(
        (currentChannelName) =>
          window.__BUZZ_E2E_HAS_MOCK_LIVE_SUBSCRIPTION__?.({
            channelName: currentChannelName,
          }) ?? false,
        channelName,
      ),
    )
    .toBe(true);
}

async function waitForTimelineSettled(page: Page) {
  await expect(page.locator("[data-render-pending]")).toHaveCount(0);
}

async function openGeneral(page: Page) {
  await page.goto(`/#/channels/${CHANNEL_ID}`, {
    waitUntil: "domcontentloaded",
  });
  await expect(page.getByTestId("chat-title")).toHaveText("general");
}

async function openThread(page: Page, threadRootId = THREAD_ROOT_ID) {
  await page.goto(
    `/#/channels/${CHANNEL_ID}?messageId=${threadRootId}&thread=${threadRootId}`,
    { waitUntil: "domcontentloaded" },
  );
  await expect(page.getByTestId("message-thread-panel")).toBeVisible();
}

function channelComposer(page: Page) {
  return page.getByTestId("channel-composer-overlay");
}

function threadComposer(page: Page) {
  return page.getByTestId("thread-composer-overlay");
}

async function readComposerCaret(input: Locator) {
  return input.evaluate((element) => {
    const selection = window.getSelection();
    if (!selection?.anchorNode || !element.contains(selection.anchorNode)) {
      return null;
    }
    const range = document.createRange();
    range.selectNodeContents(element);
    range.setEnd(selection.anchorNode, selection.anchorOffset);
    return range.toString().length;
  });
}

async function pressPrimaryShiftM(page: Page) {
  const isMac = await page.evaluate(() =>
    /mac|iphone|ipad|ipod/i.test(navigator.platform),
  );
  await page.keyboard.press(`${isMac ? "Meta" : "Control"}+Shift+M`);
}

async function readPersistedDraftContent(page: Page, draftKey: string) {
  return page.evaluate((key) => {
    for (const storageKey of Object.keys(window.localStorage)) {
      if (!storageKey.startsWith("buzz-drafts.v2:")) continue;
      const drafts = JSON.parse(
        window.localStorage.getItem(storageKey) ?? "{}",
      ) as Record<string, { content?: string }>;
      const draft = drafts[key];
      if (draft) return draft.content ?? "";
    }
    return "";
  }, draftKey);
}

async function readOutgoingMentionPubkeys(page: Page, content: string) {
  return page.evaluate((expectedContent) => {
    const signedEvent = window.__BUZZ_E2E_SIGNED_EVENTS__?.find(
      (event) => event.content === expectedContent,
    );
    if (signedEvent) {
      return (signedEvent.tags ?? [])
        .filter((tag) => tag[0] === "p" && tag[1])
        .map((tag) => tag[1]);
    }

    for (const entry of window.__BUZZ_E2E_COMMAND_LOG__ ?? []) {
      if (entry.command === "send_channel_message") {
        const payload = entry.payload as
          | { content?: string; mentionPubkeys?: string[] }
          | undefined;
        if (payload?.content === expectedContent) {
          return payload.mentionPubkeys ?? [];
        }
      }

      if (entry.command !== "plugin:websocket|send") continue;
      const data = (
        entry.payload as { message?: { data?: string } } | undefined
      )?.message?.data;
      if (!data) continue;

      try {
        const frame = JSON.parse(data) as [
          string,
          { content?: string; tags?: string[][] },
        ];
        if (frame[0] !== "EVENT" || frame[1]?.content !== expectedContent) {
          continue;
        }
        return (frame[1].tags ?? [])
          .filter((tag) => tag[0] === "p" && tag[1])
          .map((tag) => tag[1]);
      } catch {}
    }

    return null;
  }, content);
}

async function emitMockMessage(
  page: Page,
  content: string,
  mentionPubkeys: string[],
) {
  await page.evaluate(
    ({ body, mentions }) => {
      window.__BUZZ_E2E_EMIT_MOCK_MESSAGE__?.({
        channelName: "general",
        content: body,
        mentionPubkeys: mentions,
      });
    },
    { body: content, mentions: mentionPubkeys },
  );
}

async function installAudienceFixtures(
  page: Page,
  options: {
    agentAName?: string;
    deferredComposerUploads?: boolean;
    sendMessageDelayMs?: number;
    sendMessageErrors?: string[];
    uploadDelayMs?: number;
    uploadDescriptors?: Array<{
      filename: string;
      sha256: string;
      size: number;
      type: string;
      uploaded: number;
      url: string;
    }>;
    usersBatchDelayMs?: number;
  } = {},
) {
  const { agentAName = "Morgarita", ...bridgeOptions } = options;
  await installMockBridge(page, {
    ...bridgeOptions,
    managedAgents: [
      {
        pubkey: AGENT_A,
        name: agentAName,
        status: "running",
        channelNames: ["general"],
      },
      {
        pubkey: AGENT_B,
        name: "Vogue",
        status: "running",
        channelNames: ["general"],
      },
    ],
  });
}

test("keeps a queued-attachment send locked through upload and send settlement", async ({
  page,
}) => {
  await installAudienceFixtures(page, {
    deferredComposerUploads: true,
    uploadDelayMs: 2_000,
    sendMessageDelayMs: 2_000,
    uploadDescriptors: [
      {
        filename: "delayed-video.mp4",
        sha256: "d".repeat(64),
        size: 16,
        type: "video/mp4",
        uploaded: 1,
        url: `https://mock.relay/media/${"d".repeat(64)}.mp4`,
      },
    ],
  });
  await openGeneral(page);

  const composer = channelComposer(page);
  const composerForm = composer.getByTestId("message-composer");
  const input = composer.getByTestId("message-input");
  await input.fill("delayed upload");

  const [chooser] = await Promise.all([
    page.waitForEvent("filechooser"),
    composer.getByRole("button", { name: "Attach file" }).click(),
  ]);
  await chooser.setFiles({
    buffer: Buffer.from("delayed video"),
    mimeType: "video/mp4",
    name: "delayed-video.mp4",
  });

  const sendAttempts = () =>
    page.evaluate(
      () =>
        window.__BUZZ_E2E_COMMAND_LOG__?.filter(
          (entry) => entry.command === "send_channel_message",
        ).length ?? 0,
    );
  const sendAttemptsBefore = await sendAttempts();
  await input.press("Enter");
  await expect(composer.getByTestId("composer-upload-progress")).toBeVisible();

  // Observe the synchronous lock itself after upload has started. The exact
  // premature-release mutation (`void uploadSettled; await Promise.resolve()`)
  // has already cleared this attribute by this boundary, before any retryable
  // downstream command or restored-audience timing can obscure the defect.
  await expect(composerForm).toHaveAttribute("data-submit-locked", "true");
  await input.press("Enter");
  await input.press("Enter");
  await expect(composerForm).toHaveAttribute("data-submit-locked", "true");

  await expect.poll(sendAttempts).toBe(sendAttemptsBefore + 1);

  // Command entry marks the independently delayed finishSend() window. Keep
  // the synchronous lock held and fence repeated submits until it settles.
  await expect(composer.getByTestId("composer-upload-progress")).toBeVisible();
  await expect(composerForm).toHaveAttribute("data-submit-locked", "true");
  await input.press("Enter");
  await input.press("Enter");
  await expect(composerForm).toHaveAttribute("data-submit-locked", "true");

  await expect(
    page
      .getByTestId("message-row")
      .filter({ hasText: "delayed upload" })
      .last(),
  ).toBeVisible({ timeout: 5_000 });
  await expect(composerForm).toHaveAttribute("data-submit-locked", "false");
});

test("automatically mentions multiple agents from the mention picker", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  await automaticallyMention(composer, "Morgarita");
  await automaticallyMention(composer, "Vogue");

  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible();
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_B}`),
  ).toBeVisible();
  await expect(
    composer.getByRole("button", { name: "Manage mentions" }),
  ).toBeVisible();
});

test("keeps the composer and global automatic mention settings synchronized", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  await composer.getByTestId("message-insert-mention").click();
  const composerToggle = composer.getByTestId(
    "mention-keep-agents-pinned-toggle",
  );
  await expect(composerToggle).toHaveAttribute("data-state", "unchecked");
  const settings = composer.getByTestId("mention-options-settings");
  await expect(settings).toBeVisible();
  const settingsBox = await settings.boundingBox();
  const heading = settings.getByText("Automatically mention agents");
  const headingBox = await heading.boundingBox();
  expect(settingsBox?.width).toBeGreaterThanOrEqual(300);
  expect(headingBox?.height).toBeLessThanOrEqual(20);
  await composer
    .getByTestId("mention-autocomplete")
    .getByRole("button", { name: "Automatically mention Morgarita" })
    .click();
  await expect(composerToggle).toHaveAttribute("data-state", "checked", {
    timeout: 1_500,
  });

  await page
    .getByTestId("composer-auto-pin-confirmation")
    .getByRole("button", { name: "Turn off" })
    .click();
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await expect(composer.getByTestId("mention-options-settings")).toBeVisible();
  await expect(composerToggle).toHaveAttribute("data-state", "unchecked", {
    timeout: 1_500,
  });

  await page.getByTestId("open-settings").click();
  await page.getByTestId("profile-popover-settings").click();
  await expect(page.getByTestId("settings-view")).toBeVisible();
  await page.getByTestId("settings-nav-agents").click();
  const settingsToggle = page
    .getByTestId("settings-automatic-agent-mentions")
    .getByRole("switch", { name: "Automatically mention agents" });
  await expect(settingsToggle).toHaveAttribute("data-state", "unchecked");

  await page.getByTestId("settings-back-to-app").click();
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
  await composer.getByTestId("message-insert-mention").click();
  await expect(
    composer.getByTestId("mention-keep-agents-pinned-toggle"),
  ).toHaveAttribute("data-state", "unchecked");
  await expect(
    composer.getByRole("button", {
      name: "Automatically mention Morgarita",
    }),
  ).toHaveAttribute("aria-pressed", "false");
});

test("the disabled root composer preserves its explicit draft without audience controls", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openGeneral(page);

  const composer = channelComposer(page);
  const input = composer.getByTestId("message-input");
  await input.fill("explicit draft text");
  await expect(composer.getByTestId("composer-address-locks")).toHaveCount(0);

  await page.getByTestId("channel-management-trigger").click();
  await expect(page.getByTestId("channel-management-sheet")).toBeVisible();
  await page.getByTestId("channel-management-archive").click();
  await expect(page.getByTestId("channel-management-unarchive")).toBeVisible();
  await page.getByTestId("auxiliary-panel-close").click();

  await expect(input).toHaveAttribute("contenteditable", "false");
  await expect(input).toHaveText("explicit draft text");
  await expect(composer.getByTestId("composer-address-locks")).toHaveCount(0);
});

test("Tab inserts a one-time agent mention by default", async ({ page }) => {
  await installAudienceFixtures(page);
  await openGeneral(page);

  const composer = channelComposer(page);
  const input = composer.getByTestId("message-input");
  await input.fill("@Mor");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();

  await input.press("Tab");

  await expect(input).toHaveText("@Morgarita ");
  await expect(composer.getByTestId("mention-autocomplete")).toHaveCount(0);
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
  const selectAllShortcut = await page.evaluate(() =>
    /mac|iphone|ipad|ipod/i.test(navigator.platform) ? "Meta+A" : "Control+A",
  );
  await input.press(selectAllShortcut);
  await input.press("Backspace");
  await expect(input).toHaveText("");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
});

test("disabling automatic mentions leaves the composer empty after send", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await composer.getByTestId("message-insert-mention").click();
  const preference = composer.getByTestId("mention-keep-agents-pinned-toggle");
  await expect(preference).toHaveAttribute("data-state", "checked");
  await preference.click();
  await expect(preference).toHaveAttribute("data-state", "unchecked");
  await input.press("Escape");

  await input.fill("@Mor");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await input.press("Tab");
  await input.type("test");
  await expect(input).toHaveText("@Morgarita test");
  await input.press("Enter");

  await expect(input).toHaveText("");
  await expect(input.locator(".agent-mention-highlight")).toHaveCount(0);
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
  await expect
    .poll(() => readOutgoingMentionPubkeys(page, "@Morgarita test"))
    .toContain(AGENT_A);
});

test("primary+Shift+M addresses the default agent, then toggles the highlighted agent in place", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await input.fill("draft text");
  await pressPrimaryShiftM(page);

  await expect(input).toHaveText("@alice draft text");
  await expect(input.locator(".agent-mention-highlight")).toHaveText("alice");
  await expect(
    page.getByTestId("composer-auto-pin-confirmation"),
  ).toContainText("alice will be mentioned automatically");
  await pressPrimaryShiftM(page);
  await expect(input).toHaveText("draft text");
  await pressPrimaryShiftM(page);
  await expect(input).toHaveText("@alice draft text");
  await expect(
    composer
      .getByTestId("composer-address-locks")
      .getByRole("button", { name: /^Don't automatically mention / }),
  ).toHaveCount(1);

  await input.fill("@Vog");
  const menu = composer.getByTestId("mention-autocomplete");
  await expect(menu.getByTestId(`mention-suggestion-${AGENT_B}`)).toHaveClass(
    /(?:^|\s)bg-accent(?:\s|$)/,
  );
  await pressPrimaryShiftM(page);

  await expect(menu).toBeVisible();
  await expect(input).toHaveText("@Vogue ");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_B}`),
  ).toBeVisible();
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
  await expect(
    composer
      .getByTestId("composer-address-locks")
      .getByRole("button", { name: /^Don't automatically mention / }),
  ).toHaveCount(1);
});

test("primary+Shift+M favors the most recently mentioned eligible agent", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);
  await emitMockMessage(page, "Please ask Vogue", [AGENT_B]);

  const input = threadComposer(page).getByTestId("message-input");
  await input.fill("draft text");
  await input.press("ArrowLeft");
  await input.press("ArrowLeft");
  await expect.poll(() => readComposerCaret(input)).toBe(8);
  await pressPrimaryShiftM(page);

  await expect(input).toHaveText("@Vogue draft text");
  await expect.poll(() => readComposerCaret(input)).toBe(15);
  await pressPrimaryShiftM(page);
  await expect(input).toHaveText("draft text");
  await pressPrimaryShiftM(page);
  await expect(input).toHaveText("@Vogue draft text");
});

test("the mention button opens settings and can undo an address", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  await automaticallyMention(composer, "Morgarita");
  const input = composer.getByTestId("message-input");
  const ingress = composer.getByRole("button", {
    name: "Manage mentions",
  });

  await input.type("draft text");
  await ingress.click();
  const menu = composer.getByTestId("mention-autocomplete");
  await expect(menu).toBeVisible();
  await expect(input).toHaveText("@Morgarita draft text");
  await expect(
    page.getByTestId("mention-keep-agents-pinned-toggle"),
  ).toBeVisible();
  const layerBox = await composer
    .getByTestId("mention-autocomplete-layer")
    .boundingBox();
  const settingsBox = await page
    .getByTestId("mention-options-settings")
    .boundingBox();
  const menuBox = await menu.boundingBox();
  expect(layerBox).not.toBeNull();
  expect(settingsBox).not.toBeNull();
  expect(menuBox).not.toBeNull();
  if (!layerBox || !settingsBox || !menuBox) {
    throw new Error("Mention tray is not laid out");
  }
  await page.mouse.click(
    layerBox.x + layerBox.width / 2,
    (settingsBox.y + settingsBox.height + menuBox.y) / 2,
  );
  await expect(menu).toHaveCount(0);
  await expect(input).toHaveText("@Morgarita draft text");
  await ingress.click();
  await expect(menu).toBeVisible();
  await expect(page.getByTestId("mention-options-settings")).toBeVisible();
  await expect(
    page.getByTestId("mention-keep-agents-pinned-toggle"),
  ).toBeVisible();
  await ingress.click();
  await expect(menu).toHaveCount(0);
  await expect(input).toHaveText("@Morgarita draft text");
  await ingress.click();
  await expect(menu).toBeVisible();
  await expect(page.getByTestId("user-profile-panel")).toHaveCount(0);
  await expect(
    menu.getByRole("button", {
      name: "Don't automatically mention Morgarita in this thread",
    }),
  ).toHaveAttribute("aria-pressed", "true");

  await menu
    .getByRole("button", {
      name: "Don't automatically mention Morgarita in this thread",
    })
    .click();
  await expect(input).toHaveText("@Morgarita draft text");
  await expect(
    composer.getByRole("button", { name: "Mention someone" }),
  ).toBeVisible();
  await input.fill("");

  await menu
    .getByRole("button", { name: "Mention Morgarita", exact: true })
    .click();
  await expect(input).toHaveText("@Morgarita ");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible();

  await input.type("later");
  await input.press("Enter");
  await expect(input).toHaveText("");
  await expect
    .poll(() => readOutgoingMentionPubkeys(page, "@Morgarita later"))
    .toContain(AGENT_A);
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
});

test("always-mentioned agents remain selected without replaying their animation while Enter-send resolves", async ({
  page,
}) => {
  await installAudienceFixtures(page, {
    sendMessageDelayMs: 1_500,
    usersBatchDelayMs: 1_500,
  });
  await openThread(page);

  const composer = threadComposer(page);
  await automaticallyMention(composer, "Morgarita");
  const input = composer.getByTestId("message-input");
  await input.evaluate((element) => {
    const snapshots = [element.textContent ?? ""];
    new MutationObserver(() =>
      snapshots.push(element.textContent ?? ""),
    ).observe(element, { childList: true, characterData: true, subtree: true });
    (
      window as typeof window & { __BUZZ_COMPOSER_TEXT_SNAPSHOTS__?: string[] }
    ).__BUZZ_COMPOSER_TEXT_SNAPSHOTS__ = snapshots;
  });
  const avatar = composer.getByTestId(`composer-address-lock-${AGENT_A}`);
  const initialPulseVersion = Number(
    await avatar.getAttribute("data-pulse-version"),
  );
  await input.type("hello");
  await input.evaluate((element) => {
    const snapshots = (
      window as typeof window & { __BUZZ_COMPOSER_TEXT_SNAPSHOTS__?: string[] }
    ).__BUZZ_COMPOSER_TEXT_SNAPSHOTS__;
    snapshots?.splice(0, snapshots.length, element.textContent ?? "");
  });
  await input.press("Enter");

  await expect(input).toHaveText("@Morgarita ", { timeout: 500 });
  await expect
    .poll(() =>
      page.evaluate(
        () =>
          (
            window as typeof window & {
              __BUZZ_COMPOSER_TEXT_SNAPSHOTS__?: string[];
            }
          ).__BUZZ_COMPOSER_TEXT_SNAPSHOTS__ ?? [],
      ),
    )
    .not.toContain("");
  await expect(avatar).toHaveAttribute(
    "data-pulse-version",
    String(initialPulseVersion),
    { timeout: 500 },
  );
  await expect(
    composer.getByRole("button", { name: "Manage mentions" }),
  ).toBeVisible();
  await expect(input).toBeFocused();
  await expect(composer.getByTestId("mention-autocomplete")).toHaveCount(0);

  await expect
    .poll(() => readOutgoingMentionPubkeys(page, "@Morgarita hello"))
    .toContain(AGENT_A);
  await expect(input).toHaveText("@Morgarita ");

  const sentRow = page
    .getByTestId("message-row")
    .filter({ hasText: "hello" })
    .last();
  const addressPrefix = sentRow.locator(
    "[data-mention].agent-mention-highlight",
    { hasText: "Morgarita" },
  );
  await expect(addressPrefix).toBeVisible();
  await expect(addressPrefix).toHaveText("Morgarita");

  await input.type("follow up");
  await input.press("Enter");
  const inlineMentionRow = page
    .getByTestId("message-row")
    .filter({ hasText: "follow up" })
    .last();
  await expect(
    inlineMentionRow.locator("[data-mention].agent-mention-highlight", {
      hasText: "Morgarita",
    }),
  ).toHaveCount(1);
});

test("the unfocused root composer keeps its dismissed mention menu closed through a thread send", async ({
  page,
}) => {
  await installAudienceFixtures(page, { sendMessageDelayMs: 1_500 });
  await openGeneral(page);

  const mainComposer = channelComposer(page);
  const mainInput = mainComposer.getByTestId("message-input");
  await mainInput.fill("@Mor");
  await expect(mainComposer.getByTestId("mention-autocomplete")).toBeVisible();
  await mainInput.press("Escape");
  await expect(mainComposer.getByTestId("mention-autocomplete")).toHaveCount(0);

  const rootMessage = page.locator(
    `[data-testid="message-row"][data-message-id="${THREAD_ROOT_ID}"]`,
  );
  await rootMessage
    .getByRole("button", { name: "Reply" })
    .evaluate((button: HTMLButtonElement) => button.click());

  const threadPanel = page.getByTestId("message-thread-panel");
  await expect(threadPanel).toBeVisible();
  const threadInput = threadPanel.getByTestId("message-input");
  await threadInput.click();
  await expect(threadInput).toBeFocused();
  await expect(mainComposer.getByTestId("mention-autocomplete")).toHaveCount(0);
  await mainComposer.evaluate((element) => {
    element.dataset.mentionMenuReopened = "false";
    new MutationObserver(() => {
      if (element.querySelector('[data-testid="mention-autocomplete"]')) {
        element.dataset.mentionMenuReopened = "true";
      }
    }).observe(element, { childList: true, subtree: true });
  });

  const reply = `Thread reply ${Date.now()}`;
  await threadInput.fill(reply);
  await threadInput.press("Enter");
  await expect(mainInput).toHaveAttribute("contenteditable", "false");
  await expect(threadPanel).toContainText(reply);
  await expect(mainInput).toHaveAttribute("contenteditable", "true");

  expect(await mainComposer.getAttribute("data-mention-menu-reopened")).toBe(
    "false",
  );
  await expect(mainComposer.getByTestId("mention-autocomplete")).toHaveCount(0);

  // Refocusing the drafted composer must not resurrect the menu the user
  // dismissed with Escape: the setEditable toggles around the send used to
  // emit a phantom update that replayed the stale "@Morgarita" query and
  // flipped the mention state back open, so a bare click brought the menu
  // back without any typing.
  await mainInput.click();
  await expect(mainInput).toBeFocused();
  await expect(mainComposer.getByTestId("mention-autocomplete")).toHaveCount(0);
  expect(await mainComposer.getAttribute("data-mention-menu-reopened")).toBe(
    "false",
  );
});

test("pressing a mention overlay's own container keeps it open", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await composer.getByTestId("message-insert-mention").click();
  const list = composer.getByTestId("mention-autocomplete");
  await expect(list).toBeVisible();
  await expect(input).toBeFocused();

  // A mousedown landing on the list container itself — its padding ring here,
  // a native scrollbar on platforms that render one — steals focus from the
  // editor unless the default is prevented, and the focus gate would then
  // unmount the menu mid-press.
  const listBox = await list.boundingBox();
  if (!listBox) throw new Error("mention list is not laid out");
  await list.click({ position: { x: 2, y: listBox.height / 2 } });
  await expect(input).toBeFocused();
  await expect(list).toBeVisible();

  // Same hazard on the options surface, where it needs no exotic scrollbar
  // setting to reproduce: the switch's label text is a container press, so the
  // overlay used to vanish before the forwarded click reached the switch.
  const preference = composer.getByTestId("mention-keep-agents-pinned-toggle");
  await expect(preference).toHaveAttribute("data-state", "checked");
  await composer
    .getByText("Automatically mention agents", { exact: true })
    .click();
  await expect(preference).toHaveAttribute("data-state", "unchecked");
  await expect(input).toBeFocused();
  await expect(list).toBeVisible();
});

test("the mention setting is reachable and operable by keyboard", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);

  const mainComposer = threadComposer(page);
  const mainInput = mainComposer.getByTestId("message-input");
  await mainInput.click();
  await mainInput.fill("@Mor");
  const list = mainComposer.getByTestId("mention-autocomplete");
  await expect(list).toBeVisible();
  await expect(mainInput).toBeFocused();

  // Trip a flag if the overlay ever unmounts from here on — "operable while
  // the surface stays mounted" has to hold through every focus handoff below,
  // not just at the polled assertion boundaries.
  await mainComposer.evaluate((element) => {
    element.dataset.mentionMenuUnmounted = "false";
    new MutationObserver(() => {
      if (!element.querySelector('[data-testid="mention-autocomplete"]')) {
        element.dataset.mentionMenuUnmounted = "true";
      }
    }).observe(element, { childList: true, subtree: true });
  });

  // Forward Tab still selects the highlighted suggestion, so Shift+Tab is the
  // route into the always-visible setting. The focus gate must treat it as
  // composer-owned focus rather than unmounting on the editor's blur.
  await mainInput.press("Shift+Tab");
  const preference = mainComposer.getByTestId(
    "mention-keep-agents-pinned-toggle",
  );
  await expect(preference).toBeFocused();
  await expect(preference).toHaveAttribute("data-state", "checked");

  await page.keyboard.press("Space");
  await expect(preference).toHaveAttribute("data-state", "unchecked");

  await expect(list).toBeVisible();
  expect(await mainComposer.getAttribute("data-mention-menu-unmounted")).toBe(
    "false",
  );

  // Escape is the way back out: focus returns to the editor and the menu
  // closes, rather than stranding focus on a control that just unmounted.
  await page.keyboard.press("Escape");
  await expect(mainInput).toBeFocused();
  await expect(list).toHaveCount(0);

  // Forward Tab is unchanged by the Shift+Tab route.
  await mainInput.fill("@Morg");
  await expect(list).toBeVisible();
  await mainInput.press("Tab");
  await expect(mainInput).toHaveText("@Morgarita ");
  await expect(list).toHaveCount(0);

  // Ownership is still per-composer: focus moving to a sibling composer hides
  // this composer's menu, which is what stops a background composer from
  // resurrecting a stale one. Programmatic focus, not a click — a pointerdown
  // would dismiss the menu through its outside-press handler and mask the gate
  // under test.
  await mainInput.fill("@Mor");
  await expect(list).toBeVisible();
  const rootInput = channelComposer(page).getByTestId("message-input");
  await rootInput.focus();
  await expect(rootInput).toBeFocused();
  await expect(list).toHaveCount(0);
});

test("a failed always-mentioned send shakes the composer avatar without replaying its selection animation", async ({
  page,
}) => {
  await installAudienceFixtures(page, {
    sendMessageDelayMs: 500,
    sendMessageErrors: ["simulated send failure"],
  });
  await openThread(page);

  const composer = threadComposer(page);
  await automaticallyMention(composer, "Morgarita");
  const input = composer.getByTestId("message-input");
  const avatar = composer.getByTestId(`composer-address-lock-${AGENT_A}`);
  const initialPulseVersion = Number(
    await avatar.getAttribute("data-pulse-version"),
  );
  await expect(avatar).toHaveAttribute("data-shake-version", "0");

  await input.type("please retry");
  await input.press("Enter");

  await expect(avatar).toHaveAttribute(
    "data-pulse-version",
    String(initialPulseVersion),
    { timeout: 500 },
  );
  await expect(input).toHaveText("@Morgarita please retry");
  await expect(avatar).toHaveAttribute("data-shake-version", "1");
});

test("a manual mention persists when automatic mentions are enabled", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page, { sendMessageDelayMs: 1_500 });
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await input.fill("@Mor");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await input.press("Tab");
  await expect(input).toHaveText("@Morgarita ");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible();

  const autoPinConfirmation = page.getByTestId(
    "composer-auto-pin-confirmation",
  );
  await expect(autoPinConfirmation).toContainText(
    "Morgarita will be mentioned automatically",
  );
  await expect(autoPinConfirmation).not.toContainText(
    "Future messages in this channel will include this agent.",
  );
  await expect(autoPinConfirmation).toHaveAttribute("data-side", "left");
  await expect(autoPinConfirmation.locator("span")).toHaveCSS(
    "white-space",
    "nowrap",
  );
  await expect(
    page
      .locator("[data-sonner-toast]")
      .filter({ hasText: "Morgarita will be mentioned automatically" }),
  ).toHaveCount(0);
  const addressControlBox = await composer
    .getByTestId("composer-address-locks")
    .locator("..")
    .boundingBox();
  const confirmationBox = await autoPinConfirmation.boundingBox();
  expect(addressControlBox).not.toBeNull();
  expect(confirmationBox).not.toBeNull();
  if (!addressControlBox || !confirmationBox) {
    throw new Error("Automatic mention confirmation is not laid out");
  }
  expect(confirmationBox.x + confirmationBox.width).toBeLessThanOrEqual(
    addressControlBox.x,
  );
  const turnOffAction = autoPinConfirmation.getByRole("button", {
    name: "Turn off",
  });
  await expect(turnOffAction).toHaveRole("button");
  await expect(turnOffAction).toHaveText("Turn off");

  await input.press("Escape");
  await expect(autoPinConfirmation).toHaveCount(0);

  await input.type("hello");
  await input.press("Enter");

  await expect(input).toHaveText("@Morgarita ", { timeout: 2_500 });
  await expect(input.locator("[data-placeholder]")).toHaveCount(0);
  await expect(input).toBeFocused();
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible({ timeout: 2_500 });
  await expect(autoPinConfirmation).toHaveCount(0);
  await expect
    .poll(() => readOutgoingMentionPubkeys(page, "@Morgarita hello"))
    .toContain(AGENT_A);

  await expect(input).toHaveAttribute("contenteditable", "true", {
    timeout: 2_500,
  });
  await input.fill("follow up");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
  await input.press("Enter");
  await expect
    .poll(() => readOutgoingMentionPubkeys(page, "follow up"))
    .not.toContain(AGENT_A);
});

test("the auto-pin popover can turn off automatic agent mentions", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await input.fill("@Mor");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await input.press("Tab");
  await expect(input).toHaveText("@Morgarita ");

  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible();
  const autoPinConfirmation = page.getByTestId(
    "composer-auto-pin-confirmation",
  );
  await expect(autoPinConfirmation).toContainText(
    "Morgarita will be mentioned automatically",
  );
  await autoPinConfirmation.getByRole("button", { name: "Turn off" }).click();

  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await expect(composer.getByTestId("mention-options-settings")).toBeVisible();
  await expect(
    composer.getByTestId("mention-keep-agents-pinned-toggle"),
  ).toHaveAttribute("data-state", "unchecked");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
  await expect(autoPinConfirmation).toHaveCount(0);

  await input.press("Escape");
  await expect(composer.getByTestId("mention-autocomplete")).toHaveCount(0);
});

test("the auto-pin popover remains open while hovered", async ({ page }) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await input.fill("@Mor");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await input.press("Tab");

  const autoPinConfirmation = page.getByTestId(
    "composer-auto-pin-confirmation",
  );
  await autoPinConfirmation.hover();
  await page.waitForTimeout(4_250);
  await expect(autoPinConfirmation).toBeVisible();

  await input.press("Escape");
  await expect(autoPinConfirmation).toHaveCount(0);
});

test("removing the mention chip dismisses the auto-pin popover", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await input.fill("@Mor");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await input.press("Tab");

  const autoPinConfirmation = page.getByTestId(
    "composer-auto-pin-confirmation",
  );
  await expect(autoPinConfirmation).toBeVisible();

  const selectAllShortcut = await page.evaluate(() =>
    /mac|iphone|ipad|ipod/i.test(navigator.platform) ? "Meta+A" : "Control+A",
  );
  await input.press(selectAllShortcut);
  await input.press("Backspace");

  await expect(input).toHaveText("");
  await expect(autoPinConfirmation).toHaveCount(0);
});

test("automatic mentions exist only in thread composers and stay thread-scoped", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openGeneral(page);

  const rootComposer = channelComposer(page);
  await rootComposer.getByTestId("message-insert-mention").click();
  await expect(
    rootComposer.getByTestId("mention-options-settings"),
  ).toHaveCount(0);
  await expect(
    rootComposer.getByRole("button", { name: /^Automatically mention / }),
  ).toHaveCount(0);

  await openThread(page);
  await automaticallyMention(threadComposer(page), "Vogue");
  await expect(
    threadComposer(page).getByTestId(`composer-address-lock-${AGENT_B}`),
  ).toBeVisible();

  await openThread(page, "mock-general-alice");
  await expect(
    threadComposer(page).getByTestId(`composer-address-lock-${AGENT_B}`),
  ).toHaveCount(0);
});

test("a root agent mention is explicit for one message and never becomes retained", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page, { agentAName: "claude code" });
  await openGeneral(page);

  const composer = channelComposer(page);
  const input = composer.getByTestId("message-input");
  const firstRootMessage = "@claude code one time";
  await input.fill("@cla");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await input.press("Tab");
  await input.pressSequentially(" one time");
  await expect(input).toHaveText(firstRootMessage);
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
  await input.press("Enter");

  await expect(input).toHaveText("");
  await expect
    .poll(() =>
      page.evaluate(
        (pubkey) =>
          Boolean(
            window.__BUZZ_E2E_SIGNED_EVENTS__?.some((event) =>
              (event.tags ?? []).some(
                (tag) => tag[0] === "p" && tag[1] === pubkey,
              ),
            ),
          ),
        AGENT_A,
      ),
    )
    .toBe(true);
  await input.fill("next root message");
  await input.press("Enter");
  await expect
    .poll(() => readOutgoingMentionPubkeys(page, "next root message"))
    .toEqual([]);
});

test("a removed root-inherited agent stays excluded after the thread reopens", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openGeneral(page);
  await waitForMockLiveSubscription(page, "general");

  const rootId = "c".repeat(64);
  const rootContent = "@Morgarita root request";
  await page.evaluate(
    ({ agentPubkey, content, eventId }) => {
      window.__BUZZ_E2E_EMIT_MOCK_MESSAGE__?.({
        channelName: "general",
        content,
        id: eventId,
        mentionPubkeys: [agentPubkey],
      });
    },
    { agentPubkey: AGENT_A, content: rootContent, eventId: rootId },
  );
  await waitForTimelineSettled(page);

  const rootRow = page
    .getByTestId("message-timeline")
    .locator(`[data-testid="message-row"][data-message-id="${rootId}"]`);
  await expect(rootRow).toBeVisible();
  await rootRow.hover();
  await rootRow.getByRole("button", { name: "Reply" }).click();
  await expect(page.getByTestId("message-thread-panel")).toBeVisible();

  let composer = threadComposer(page);
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible();
  await expect(composer.getByTestId("message-input")).toHaveText("@Morgarita ");
  await composer.getByTestId(`composer-address-lock-remove-${AGENT_A}`).click();
  await expect(composer.getByTestId("message-input")).toHaveText("");

  const threadPanel = page.getByTestId("message-thread-panel");
  await threadPanel.getByTestId("auxiliary-panel-close").click();
  await expect(threadPanel).toBeHidden();

  const loadedRootTags = await page.evaluate(async (eventId) => {
    const raw = await window.__BUZZ_E2E_INVOKE_MOCK_COMMAND__?.("get_event", {
      eventId,
    });
    return typeof raw === "string"
      ? (JSON.parse(raw) as { tags?: string[][] }).tags
      : null;
  }, rootId);
  expect(loadedRootTags).toContainEqual(["p", AGENT_A]);

  await rootRow.hover();
  await rootRow.getByRole("button", { name: "Reply" }).click();
  await expect(threadPanel).toBeVisible();

  composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
  await expect(input).toHaveText("");

  const reply = "plain reply after reopening";
  await input.fill(reply);
  await input.press("Enter");
  await expect
    .poll(() => readOutgoingMentionPubkeys(page, reply))
    .not.toContain(AGENT_A);
});

test("an unchecked agent remains excluded while automatic mentions stay enabled", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);
  await automaticallyMention(threadComposer(page), "Morgarita");

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await composer.getByTestId(`composer-address-lock-remove-${AGENT_A}`).click();
  await expect(input).toHaveText("");
  await input.fill("@Mor");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await input.press("Tab");
  await input.type("one time");
  await input.press("Enter");

  await expect(input).toHaveText("");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);
});

test("re-adding a deleted automatic mention restores its automatic mention state immediately", async ({
  page,
}) => {
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await automaticallyMention(composer, "Morgarita");

  const selectAllShortcut = await page.evaluate(() =>
    /mac|iphone|ipad|ipod/i.test(navigator.platform) ? "Meta+A" : "Control+A",
  );
  await input.press(selectAllShortcut);
  await input.press("Backspace");

  await expect(input).toHaveText("");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);

  await input.fill("@Mor");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await input.press("Tab");
  await expect(input).toHaveText("@Morgarita ");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible();

  await input.type("re-added");
  await input.press("Enter");

  await expect(input).toHaveText("@Morgarita ");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible();
});

test("implicit automatic mentions stay out of persisted drafts", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);
  await automaticallyMention(threadComposer(page), "Morgarita");
  const input = threadComposer(page).getByTestId("message-input");
  await input.type("draft text");

  await openGeneral(page);
  await openThread(page);

  await expect(input).toHaveText("@Morgarita draft text");
  await expect(input.locator(".agent-mention-highlight")).toHaveCount(1);
  await input.pressSequentially(" continues");
  await expect(input).toHaveText("@Morgarita draft text continues");
  await expect(input.locator(".agent-mention-highlight")).toHaveCount(1);

  await page.goto(`/#/channels/${RANDOM_CHANNEL_ID}`, {
    waitUntil: "domcontentloaded",
  });
  await expect(page.getByTestId("chat-title")).toHaveText("random");

  await expect
    .poll(() => readPersistedDraftContent(page, `thread:${THREAD_ROOT_ID}`))
    .toBe("draft text continues");
});

test("an authored duplicate leading mention survives draft restoration", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);
  await automaticallyMention(threadComposer(page), "Morgarita");
  const input = threadComposer(page).getByTestId("message-input");
  await input.pressSequentially("@Morgarita authored duplicate");

  await openGeneral(page);
  await openThread(page);

  await expect(input).toHaveText("@Morgarita authored duplicate");
  await expect(input.locator(".agent-mention-highlight")).toHaveCount(1);

  await page.goto(`/#/channels/${RANDOM_CHANNEL_ID}`, {
    waitUntil: "domcontentloaded",
  });
  await expect(page.getByTestId("chat-title")).toHaveText("random");
  await expect
    .poll(() => readPersistedDraftContent(page, `thread:${THREAD_ROOT_ID}`))
    .toBe("@Morgarita authored duplicate");
});

test("typed deletion preserves an identical authored mention in drafts", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);
  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await automaticallyMention(composer, "Morgarita");

  const selectAllShortcut = await page.evaluate(() =>
    /mac|iphone|ipad|ipod/i.test(navigator.platform) ? "Meta+A" : "Control+A",
  );
  await input.press(selectAllShortcut);
  await input.press("Backspace");
  await expect(input).toHaveText("");
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toHaveCount(0);

  await input.pressSequentially("@Morgarita manual after typed deletion");
  await page.goto(`/#/channels/${RANDOM_CHANNEL_ID}`, {
    waitUntil: "domcontentloaded",
  });
  await expect
    .poll(() => readPersistedDraftContent(page, `thread:${THREAD_ROOT_ID}`))
    .toBe("@Morgarita manual after typed deletion");
});

test("removing an automatic mention preserves an identical authored mention in drafts", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);
  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");

  await automaticallyMention(composer, "Morgarita");
  await composer.getByTestId(`composer-address-lock-remove-${AGENT_A}`).click();
  await input.pressSequentially("@Morgarita manual after removal");
  await page.goto(`/#/channels/${RANDOM_CHANNEL_ID}`, {
    waitUntil: "domcontentloaded",
  });

  await expect
    .poll(() => readPersistedDraftContent(page, `thread:${THREAD_ROOT_ID}`))
    .toBe("@Morgarita manual after removal");
});

test("multiple automatic mentions stay out of persisted drafts", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);
  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await automaticallyMention(composer, "Morgarita");
  await automaticallyMention(composer, "Vogue");
  await input.pressSequentially("draft text");

  await openGeneral(page);
  await openThread(page);
  await expect(input).toHaveText("@Morgarita @Vogue draft text");
  await expect(input.locator(".agent-mention-highlight")).toHaveCount(2);
  await page.goto(`/#/channels/${RANDOM_CHANNEL_ID}`, {
    waitUntil: "domcontentloaded",
  });
  await expect
    .poll(() => readPersistedDraftContent(page, `thread:${THREAD_ROOT_ID}`))
    .toBe("draft text");
});

test("re-enabling an automatic mention preserves an authored duplicate after draft restoration", async ({
  page,
}) => {
  await installAudienceFixtures(page);
  await openThread(page);
  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");

  await automaticallyMention(composer, "Morgarita");
  await composer.getByTestId(`composer-address-lock-remove-${AGENT_A}`).click();
  await expect(input).toHaveText("");

  await automaticallyMention(composer, "Morgarita");
  await input.pressSequentially("@Morgarita authored duplicate");
  await openGeneral(page);
  await openThread(page);

  await expect(input).toHaveText("@Morgarita authored duplicate");
  await expect(input.locator(".agent-mention-highlight")).toHaveCount(1);

  await page.goto(`/#/channels/${RANDOM_CHANNEL_ID}`, {
    waitUntil: "domcontentloaded",
  });
  await expect(page.getByTestId("chat-title")).toHaveText("random");
  await expect
    .poll(() => readPersistedDraftContent(page, `thread:${THREAD_ROOT_ID}`))
    .toBe("@Morgarita authored duplicate");
});

test("a restored multi-word automatic mention remains a chip with the caret after its space", async ({
  page,
}) => {
  await installAudienceFixtures(page, { agentAName: "claude code" });
  await openThread(page);
  const originalComposer = threadComposer(page);
  await automaticallyMention(originalComposer, "claude code");
  const originalInput = originalComposer.getByTestId("message-input");
  await originalInput.pressSequentially("hello");
  await originalInput.press("Enter");
  await expect
    .poll(() => readOutgoingMentionPubkeys(page, "@claude code hello"))
    .toContain(AGENT_A);
  await expect(originalInput).toHaveText("@claude code ");

  await page.goto(`/#/channels/${RANDOM_CHANNEL_ID}`, {
    waitUntil: "domcontentloaded",
  });
  await expect(page.getByTestId("chat-title")).toHaveText("random");
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  const expectedContent = "@claude code ";
  await expect(input).toHaveText(expectedContent);
  await expect(input.locator(".agent-mention-highlight")).toHaveCount(1);
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible();
  await expect(
    composer.getByRole("button", { name: "Manage mentions" }),
  ).toBeVisible();
  await page.waitForTimeout(500);
  await expect(input.locator(".agent-mention-highlight")).toHaveCount(1);
  await expect(input).toBeFocused();
  await expect
    .poll(() => readComposerCaret(input))
    .toBe(expectedContent.length);

  await input.pressSequentially("follow-up");
  await expect(input).toHaveText("@claude code follow-up");
  await expect(input.locator(".agent-mention-highlight")).toHaveCount(1);
  await expect(
    composer.getByTestId(`composer-address-lock-${AGENT_A}`),
  ).toBeVisible();
});

test("reduced motion removes addressed agents without spatial animation", async ({
  page,
}) => {
  await page.emulateMedia({ reducedMotion: "reduce" });
  await keepMentionedAgentsPinned(page);
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await input.fill("@Mor");
  await expect(composer.getByTestId("mention-autocomplete")).toBeVisible();
  await input.press("Tab");
  const removeButton = composer.getByTestId(
    `composer-address-lock-remove-${AGENT_A}`,
  );
  await expect(removeButton).toBeVisible();
  await expect(removeButton).toHaveAttribute("style", /opacity: 1/);
  await expect(removeButton).toHaveCSS("transform", "none");

  await removeButton.click();
  await expect(input).toHaveText("");
  await expect(removeButton).toHaveCount(0);
});

for (const theme of ["buzz", "buzz-dark"]) {
  test(`captures the mention-button placement in ${theme}`, async ({
    page,
  }) => {
    await seedTheme(page, theme);
    await installAudienceFixtures(page);
    await openThread(page);
    const overlay = threadComposer(page);
    const composer = overlay.getByTestId("message-composer");
    await automaticallyMention(overlay, "Morgarita");
    await automaticallyMention(overlay, "Vogue");
    await overlay.getByTestId("message-input").focus();
    await waitForAnimations(page);
    await composer.screenshot({ path: `${SHOTS}/${theme}-mention-button.png` });
  });
}

test("the mention-button placement fits the narrow composer", async ({
  page,
}) => {
  await page.setViewportSize({ width: 700, height: 760 });
  await installAudienceFixtures(page);
  await openThread(page);
  const overlay = threadComposer(page);
  const composer = overlay.getByTestId("message-composer");
  await automaticallyMention(overlay, "Morgarita");
  await automaticallyMention(overlay, "Vogue");
  await expect(overlay.getByTestId("composer-address-locks")).toBeVisible();
  await expect(
    overlay.getByRole("button", { name: "Manage mentions" }),
  ).toBeVisible();
  await waitForAnimations(page);
  await composer.screenshot({ path: `${SHOTS}/narrow-mention-button.png` });
});

test("captures the lightweight auto-pin popover", async ({ page }) => {
  await seedTheme(page, "buzz-dark");
  await installAudienceFixtures(page);
  await openThread(page);

  const composer = threadComposer(page);
  const input = composer.getByTestId("message-input");
  await input.fill("draft text");
  await pressPrimaryShiftM(page);
  await expect(input).toHaveText("@alice draft text");

  const addressControl = composer
    .getByTestId("composer-address-locks")
    .locator("..");
  const confirmation = page.getByTestId("composer-auto-pin-confirmation");
  await expect(confirmation).toContainText(
    "alice will be mentioned automatically",
  );
  await waitForAnimations(page);

  const addressBox = await addressControl.boundingBox();
  const confirmationBox = await confirmation.boundingBox();
  expect(addressBox).not.toBeNull();
  expect(confirmationBox).not.toBeNull();
  if (!addressBox || !confirmationBox) {
    throw new Error("Popover is not laid out");
  }

  const left = addressBox.x - 14;
  const top = Math.min(addressBox.y, confirmationBox.y) - 14;
  const right = confirmationBox.x + confirmationBox.width + 14;
  const bottom =
    Math.max(
      addressBox.y + addressBox.height,
      confirmationBox.y + confirmationBox.height,
    ) + 14;
  await page.screenshot({
    path: `${SHOTS}/auto-pin-popover-dark.png`,
    clip: { x: left, y: top, width: right - left, height: bottom - top },
  });
});