#!/usr/bin/env node
// The page under a headless browser, against a mocked bridge (tests/ui/mock-tauri.js): what the
// person sees for a given answer of the server's /api/v2, and what the page sends back.
//
//     node tests/ui/run.mjs [name-filter]
//
// Needs Playwright (`playwright` or `playwright-core`, from NODE_PATH or a node_modules beside
// the repository) and a Chromium: Playwright's own, or the one in $CHROMIUM (/usr/bin/chromium
// is tried when Playwright has none). Nothing is built and no server is started: the page's
// files are handed to the browser from ui/ as they are in the repository. With $SHOTS set to a
// directory, some tests leave a screenshot there.
//
// The shapes are the server's (`api/v2/serialise.py`, its fixtures in tests/fixtures/api_v2),
// with made-up names. Where the server's fixture differs from what its code sends, the test
// says so and follows the code.

import { createRequire } from "node:module"
import { readFileSync, existsSync } from "node:fs"
import { dirname, join, extname } from "node:path"
import { fileURLToPath } from "node:url"
import assert from "node:assert/strict"

const HERE = dirname(fileURLToPath(import.meta.url))
const UI = join(HERE, "..", "..", "ui")
const ORIGIN = "http://app.test"
const require = createRequire(join(process.cwd(), "noop.js"))

function playwright() {
  for (const name of ["playwright", "playwright-core"]) {
    try {
      return require(name)
    } catch {}
    try {
      return createRequire(import.meta.url)(name)
    } catch {}
  }
  console.error("tests/ui: Playwright is not installed (npm install playwright-core, and put it on NODE_PATH)")
  process.exit(2)
}

async function launch() {
  const { chromium } = playwright()
  const paths = [process.env.CHROMIUM, "/usr/bin/chromium", "/usr/bin/chromium-browser"].filter(Boolean)
  if (!process.env.CHROMIUM) {
    try {
      return await chromium.launch()
    } catch {}
  }
  for (const executablePath of paths) if (existsSync(executablePath)) return chromium.launch({ executablePath })
  throw new Error("tests/ui: no Chromium found (set CHROMIUM)")
}

const TYPES = { ".html": "text/html", ".js": "text/javascript", ".css": "text/css", ".svg": "image/svg+xml", ".mjs": "text/javascript", ".json": "application/json" }

// --- The server, as the tests' table -----------------------------------------------------------

const STAMP = "2026-01-02T03:04:05+00:00"

function status(over = {}) {
  return {
    version: "1.0.0-test",
    server: "https://ai.example",
    discovery: { name: "Example", app: "https://ai.example/api/v2", version: "2.0.0" },
    refused: null,
    checked: true,
    account: { name: "Ada Example", email: "ada@example.org" },
    signing_in: false,
    linked: true,
    agent: { state: "running", detail: null },
    agent_wanted: true,
    update: null,
    remote: { enabled: true, roots: ["/home/dev/project"] },
    theme: "moria",
    host: "workbench",
    notify: false,
    ...over,
  }
}

const SUB = (offered, named_only = false) => ({ offered, named_only })

/** The models as `/api/v2/models` lists them; `subagents` per model as the server works it out. */
function models({ qwen = SUB(true), solo = SUB(true, true), plain = SUB(false) } = {}) {
  const base = { vision: false, tools: true, efforts: ["low", "medium", "high"], thinking_switch: false, levels: ["low", "medium", "high"], effort: "medium", control: "slider", context: 131072, image: null }
  return {
    models: [
      { ...base, id: "qwen", name: "Qwen", parallel: 2, default: true, subagents: qwen },
      { ...base, id: "solo", name: "Solo", parallel: 1, default: false, subagents: solo },
      { ...base, id: "plain", name: "Plain", parallel: 1, default: false, subagents: plain },
    ],
    subagents_cap: 8,
  }
}

function chatRow(over = {}) {
  return {
    id: "chat1",
    kind: "chat",
    title: "Waybread",
    model: "qwen",
    folder_id: null,
    pinned: false,
    archived: false,
    temporary: false,
    unread: false,
    running: false,
    mode: "",
    effort: "medium",
    device: null,
    device_session_id: null,
    parent_chat_id: null,
    agents: { min: 1, max: 4 },
    subagents: { offered: true, named_only: false, cap: 8 },
    created_at: STAMP,
    updated_at: STAMP,
    ...over,
  }
}

function agentChat(over = {}) {
  return chatRow({
    id: "chat2",
    kind: "agent",
    title: "Tidy the build",
    running: true,
    mode: "edit",
    device: { token_id: "token1", directory: "/home/dev/project" },
    device_session_id: "ses_01",
    // An agent chat's team runs on its device: the server offers no setting (team_run.may_have_team).
    subagents: { offered: false, named_only: false, cap: 8 },
    ...over,
  })
}

const userMessage = (id, text) => ({ id, role: "user", created_at: STAMP, complete: true, stopped: false, error: null, queued: false, machine: false, origin: "", model: null, attachments: [], text })

/**
 * A device's bash approval as `services/device_link.py:_permission` builds it and
 * `api/v2/serialise.py:interruption` sends it: the title is the fixed "Run a command", the command
 * is in `detail`, and it is `editable`. (The server's fixture `event_ask.json` puts the command in
 * the title; its code does not.)
 */
function deviceBashCard(over = {}) {
  return {
    id: "card7",
    kind: "approval",
    why: "",
    dismissable: false,
    expires_in: 1800,
    items: [
      {
        index: 0,
        key: "0",
        kind: "approval",
        tool: "bash",
        title: "Run a command",
        header: "",
        detail: "ls -la build",
        reason: "Edit mode asks before anything that runs a command.",
        purpose: "See what is in the build directory",
        options: [],
        multiple: false,
        free_text: true,
        editable: true,
        plan: null,
        mode_choice: false,
        job: "",
      },
    ],
    ...over,
  }
}

function baseRoutes(over = {}) {
  return {
    "GET /me": { id: "u1", name: "Ada Example", email: "ada@example.org", theme: "moria", language: "en", permissions: {} },
    "GET /models": models(),
    "GET /devices": { devices: [{ id: "token1", name: "workbench", host: "workbench", platform: "linux", terminal: true }] },
    "GET /chats": { chats: [chatRow(), agentChat()], more: false },
    "GET /schedules": { schedules: [] },
    ...over,
  }
}

// --- The browser --------------------------------------------------------------------------------

let browser

async function page(config, { width = 1280, height = 860 } = {}) {
  const context = await browser.newContext({ viewport: { width, height } })
  const p = await context.newPage()
  const errors = []
  p.on("pageerror", (e) => errors.push(String(e)))
  await context.route(`${ORIGIN}/**`, (route) => {
    const path = new URL(route.request().url()).pathname
    const file = join(UI, path === "/" ? "index.html" : decodeURIComponent(path))
    if (!file.startsWith(UI) || !existsSync(file)) return route.fulfill({ status: 404, body: "" })
    return route.fulfill({ status: 200, contentType: TYPES[extname(file)] || "application/octet-stream", body: readFileSync(file) })
  })
  await p.addInitScript((c) => {
    window.__mockConfig = c
  }, config)
  await p.addInitScript({ path: join(HERE, "mock-tauri.js") })
  await p.goto(`${ORIGIN}/index.html`)
  await p.waitForSelector("#shell:not([hidden])")
  p.errors = errors
  return p
}

async function openChatRow(p, id) {
  await p.click(`.chatrow[data-id="${id}"]`)
  await p.waitForSelector(`#messages .msg`)
}

// --- The tests ----------------------------------------------------------------------------------

const tests = []
const test = (name, fn) => tests.push({ name, fn })

const STREAM2 = "/chats/chat2/messages/m2/stream"

function agentChatOpen(frames, over = {}) {
  return {
    status: status(),
    routes: baseRoutes({
      "GET /chats/chat2": { chat: agentChat(), messages: [userMessage("m1", "What is in build?")], more: false, live: "m2" },
      "GET /chats/chat1": { chat: chatRow(), messages: [userMessage("m5", "How is lembas made?")], more: false, live: null },
      "POST /chats/chat2/interactions/card8": { answered: true, remembered: false, not_remembered: [] },
      "GET /models?chat=chat2": models(),
      "POST /chats/chat2/interactions/card7": { answered: true, remembered: false, not_remembered: [] },
      ...over,
    }),
    streams: { [STREAM2]: frames },
  }
}

test("A1: an agent chat's device bash approval shows as a card, the command editable, and Allow answers it", async () => {
  const card = deviceBashCard()
  const p = await page(
    agentChatOpen([
      ["steps", { steps: [], tail: { thinking: false, text: "", label: "" } }],
      ["status", { text: "Waiting for you to allow bash…" }],
      ["ask", { cards: [card] }],
    ]),
  )
  await openChatRow(p, "chat2")
  await p.waitForSelector("#cards:not([hidden]) .ask")
  assert.equal(await p.textContent(".msg.is-live .msg__status"), "Waiting for you to allow bash…")
  const cardBox = await p.locator("#cards .ask").boundingBox()
  const view = p.viewportSize()
  assert.ok(cardBox && cardBox.height > 40, "the card has a size")
  assert.ok(cardBox.y >= 0 && cardBox.y + 20 <= view.height, `the card is on the screen (y=${cardBox.y})`)
  assert.ok(await p.locator("#cards .ask").isVisible(), "the card is visible")
  // The command is the item's `detail`, in the box to correct it; the title is not the command.
  assert.equal(await p.inputValue("#cards .ask__edit"), "ls -la build")
  const text = await p.textContent("#cards .ask")
  assert.match(text, /bash/)
  assert.match(text, /See what is in the build directory/, "the model's purpose is said")
  assert.match(text, /Edit mode asks before anything that runs a command\./, "the server's reason is said")
  if (process.env.SHOTS) await p.screenshot({ path: join(process.env.SHOTS, "a1-card.png") })
  await p.click("#cards .ask__actions .btn--primary")
  await p.waitForFunction(() => window.__mock.api("POST", "/chats/chat2/interactions/").length === 1)
  const [post] = await p.evaluate(() => window.__mock.api("POST", "/chats/chat2/interactions/"))
  assert.equal(post.args.path, "/chats/chat2/interactions/card7")
  assert.deepEqual(post.args.body, { verdict: "allow", choices: {}, texts: {} }, "an untouched command is not sent as an edit")
  await p.waitForSelector("#cards", { state: "hidden" })
  assert.deepEqual(p.errors, [])
})

test("A1: a corrected command is sent as the item's text; Deny sends deny", async () => {
  const p = await page(agentChatOpen([["ask", { cards: [deviceBashCard()] }]]))
  await openChatRow(p, "chat2")
  await p.waitForSelector("#cards .ask__edit")
  await p.fill("#cards .ask__edit", "ls -la build/out")
  await p.click("#cards .ask__actions .btn--primary")
  await p.waitForFunction(() => window.__mock.api("POST", "/chats/chat2/interactions/").length === 1)
  const [post] = await p.evaluate(() => window.__mock.api("POST", "/chats/chat2/interactions/"))
  assert.deepEqual(post.args.body, { verdict: "allow", choices: {}, texts: { 0: "ls -la build/out" } })
  // The next one, refused.
  await p.evaluate(([path, c]) => window.__mock.frame(path, "ask", { cards: [c] }), [STREAM2, deviceBashCard({ id: "card8" })])
  await p.waitForSelector("#cards .ask__edit")
  await p.click("#cards .ask__actions .btn >> text=Deny")
  await p.waitForFunction(() => window.__mock.api("POST", "/chats/chat2/interactions/card8").length === 1)
  const [deny] = await p.evaluate(() => window.__mock.api("POST", "/chats/chat2/interactions/card8"))
  assert.deepEqual(deny.args.body, { verdict: "deny", choices: {}, texts: {} })
  assert.deepEqual(p.errors, [])
})

test("A1: a card that arrives while the person is typing keeps what they typed and is not drawn again by an unchanged frame", async () => {
  const card = deviceBashCard()
  const p = await page(agentChatOpen([["ask", { cards: [card] }]]))
  await openChatRow(p, "chat2")
  await p.waitForSelector("#cards .ask__edit")
  await p.fill("#cards .ask__edit", "ls build")
  // The server sends the frame again when anything in it changes -- here only the countdown.
  await p.evaluate(([path, c]) => window.__mock.frame(path, "ask", { cards: [{ ...c, expires_in: 1790 }] }), [STREAM2, card])
  await p.evaluate(([path]) => window.__mock.frame(path, "status", { text: "Waiting for you to allow bash…" }), [STREAM2])
  assert.equal(await p.inputValue("#cards .ask__edit"), "ls build")
  assert.equal(await p.locator("#cards .ask").count(), 1)
  // A second card joins the first without wiping it; the answered one goes.
  await p.evaluate(([path, c]) => window.__mock.frame(path, "ask", { cards: [c, { ...c, id: "card8", items: [{ ...c.items[0], detail: "make clean" }] }] }), [STREAM2, card])
  assert.equal(await p.locator("#cards .ask").count(), 2)
  assert.equal(await p.inputValue("#cards .ask >> nth=0 >> .ask__edit"), "ls build")
  await p.evaluate(([path]) => window.__mock.frame(path, "ask", { cards: [] }), [STREAM2])
  await p.waitForSelector("#cards", { state: "hidden" })
  assert.deepEqual(p.errors, [])
})

test("A1: reopening a chat whose reply waits shows the card from the stream's first pass", async () => {
  const p = await page(agentChatOpen([["status", { text: "Waiting for you to allow bash…" }], ["ask", { cards: [deviceBashCard()] }]]))
  await openChatRow(p, "chat2")
  await p.waitForSelector("#cards .ask")
  // Away to another chat and back: the stream is opened again and its first pass carries the card.
  await p.click('.chatrow[data-id="chat1"]').catch(() => {})
  await p.waitForFunction(() => !document.querySelector("#cards .ask"))
  await openChatRow(p, "chat2")
  await p.waitForSelector("#cards:not([hidden]) .ask")
  assert.equal(await p.evaluate(() => window.__mock.calls.filter((c) => c.cmd === "stream_open" && c.args.path.includes("/messages/")).length), 2)
  assert.deepEqual(p.errors, [])
})

test("A1: a card at 390 px wide is on the screen and its buttons can be reached", async () => {
  const p = await page(agentChatOpen([["ask", { cards: [deviceBashCard()] }]]), { width: 390, height: 844 })
  await p.evaluate(() => document.querySelector('.chatrow[data-id="chat2"]').click())
  await p.waitForSelector("#cards:not([hidden]) .ask")
  const allow = await p.locator("#cards .ask__actions .btn--primary").boundingBox()
  assert.ok(allow && allow.y + allow.height <= 844 && allow.x >= 0 && allow.x + allow.width <= 390, `Allow is on the screen: ${JSON.stringify(allow)}`)
  assert.ok(await p.evaluate(() => document.documentElement.scrollWidth <= 390), "nothing scrolls sideways")
  assert.deepEqual(p.errors, [])
})

// --- A5: the Subagents setting ----------------------------------------------------------------
//
// The server decides (`services/team_run.py:offered`, `services/subagents.py:view`): subagents
// enabled on the instance, the person's permission, a model that calls tools, and some model that
// could serve one -- the chat's own serving two requests at once, or another off its one-model
// server (`named_only`: then the setting says a subagent needs a model named in the chat). It says
// so per model in `/models` (a new chat) and per chat in `/chats/{id}` (`subagents`). The web page
// reads the same function (`api/pages.py:_team_context`). The app shows what it is told.

async function newChatOn(p, kind, modelName) {
  await p.click("#new-chat-btn")
  await p.click(`.kind__tab >> text=${kind}`)
  if (modelName) {
    await p.click(".cchip--model")
    await p.locator(".menu .menu__item", { hasText: modelName }).click()
  }
}

async function subagentsChip(p) {
  // The chip comes after the others (an open chat's waits for the server's word).
  await p.waitForTimeout(150)
  return p.locator("#composer-chips .cchip--subagents")
}

async function openSlider(p) {
  await p.click("#composer-chips .cchip--subagents")
  await p.waitForSelector(".range2")
  return {
    min: await p.getAttribute(".range2__input--min", "max"),
    text: await p.textContent(".pop__body"),
  }
}

const OWN = "This model serves one request at a time: subagents need another model, on another server, named in the chat."

function a5(routes = {}) {
  return { status: status(), routes: baseRoutes(routes), streams: {} }
}

test("A5: a new chat on a model serving two at once offers Subagents, Min and Max to the server's cap", async () => {
  const p = await page(a5())
  await newChatOn(p, "Chat")
  const chip = await subagentsChip(p)
  assert.equal(await chip.count(), 1, "the chip is there")
  const s = await openSlider(p)
  assert.equal(s.min, "8", "up to the server's cap")
  assert.ok(!s.text.includes(OWN), "no one-request note")
  assert.deepEqual(p.errors, [])
})

test("A5: a new chat on a one-request model the server still offers: Subagents with the note", async () => {
  const p = await page(a5())
  await newChatOn(p, "Chat", "Solo")
  const chip = await subagentsChip(p)
  assert.equal(await chip.count(), 1)
  const s = await openSlider(p)
  assert.ok(s.text.includes(OWN), "the one-request note")
  assert.deepEqual(p.errors, [])
})

test("A5: subagents off on the instance (offered false for every model): no Subagents", async () => {
  const off = SUB(false)
  const p = await page(a5({ "GET /models": models({ qwen: off, solo: off, plain: off }) }))
  await newChatOn(p, "Chat")
  assert.equal(await (await subagentsChip(p)).count(), 0)
  await newChatOn(p, "Chat", "Solo")
  assert.equal(await (await subagentsChip(p)).count(), 0)
  assert.deepEqual(p.errors, [])
})

test("A5: subagents switched on while the app stays open: the next new chat offers them", async () => {
  const off = SUB(false)
  const p = await page(a5({ "GET /models": models({ qwen: off, solo: off, plain: off }) }))
  await newChatOn(p, "Chat")
  assert.equal(await (await subagentsChip(p)).count(), 0, "off at sign-in")
  // The administrator switches subagents on; the app read /models at sign-in.
  await p.evaluate((m) => (window.__mockConfig.routes["GET /models"] = m), models())
  await p.waitForTimeout(5200)
  await p.click("#new-chat-btn")
  await p.waitForSelector("#composer-chips .cchip--subagents")
  assert.deepEqual(p.errors, [])
})

test("A5: an open chat follows its own `subagents`: offered, offered with the note, not offered", async () => {
  for (const [said, chip, note] of [
    [{ offered: true, named_only: false, cap: 8 }, 1, false],
    [{ offered: true, named_only: true, cap: 8 }, 1, true],
    [{ offered: false, named_only: false, cap: 8 }, 0, false],
  ]) {
    const p = await page(
      a5({
        "GET /chats/chat1": { chat: chatRow({ subagents: said }), messages: [userMessage("m5", "How is lembas made?")], more: false, live: null },
        "GET /models?chat=chat1": models(),
      }),
    )
    await openChatRow(p, "chat1")
    const c = await subagentsChip(p)
    assert.equal(await c.count(), chip, `chip for ${JSON.stringify(said)}`)
    if (chip) assert.equal((await openSlider(p)).text.includes(OWN), note)
    assert.deepEqual(p.errors, [])
    await p.context().close()
  }
})

// --- B3: the Terminal panel -------------------------------------------------------------------
//
// The server's two sockets for an app (`api/v2/terminal.py`): an agent chat's
// (`/chats/{chat}/terminal/ws`) and one before the chat exists, on the device and folder chosen
// (`/devices/{device}/terminal/ws?directory=`), which the chat's first message takes over.
// `GET /devices` says per device whether it opens a terminal. The socket is Rust's: the page asks
// `terminal_open` and gets the frames as `terminal` events (mock-tauri.js plays the server).

const READY = ["control", { t: "ready", label: "workbench", dir: "/home/dev/project", cols: 80, rows: 24, shared: false, osc: false }]

function b3(over = {}, terminal = [READY, ["output", "dev@workbench:~/project$ "]]) {
  return {
    status: status(),
    routes: baseRoutes({
      "GET /chats/chat2": { chat: agentChat({ running: false }), messages: [userMessage("m1", "What is in build?")], more: false, live: null },
      "GET /models?chat=chat2": models(),
      "POST /chats": { chat: agentChat({ running: false }), message: userMessage("m9", "Build it"), reply: null },
      ...over,
    }),
    streams: {},
    terminal,
  }
}

async function screenText(p) {
  return p.evaluate(() => document.querySelector("#terminal .xterm-rows")?.textContent || "")
}

test("B3: a new agent chat offers the Terminal once its folder is chosen, and opens a shell there before the first message", async () => {
  const p = await page(b3())
  await p.click("#new-chat-btn")
  await p.click(".kind__tab >> text=Agent")
  await p.waitForSelector("#composer-chips .cchip--terminal")
  assert.equal(await p.evaluate(() => window.__mock.terminals().length), 0, "nothing is opened until asked")
  await p.click("#composer-chips .cchip--terminal")
  await p.waitForSelector("#terminal:not([hidden]) .xterm")
  await p.waitForFunction(() => window.__mock.terminals().length === 1)
  const [shell] = await p.evaluate(() => window.__mock.terminals())
  assert.deepEqual(shell.target, { chat: null, device: "token1", directory: "/home/dev/project" })
  await p.waitForFunction(() => document.querySelector("#terminal .xterm-rows")?.textContent.includes("dev@workbench"))
  assert.equal(await p.textContent("#terminal-message"), "Connected.")
  assert.equal(await p.textContent("#terminal-title"), "workbench")
  assert.equal(await p.getAttribute("#composer-chips .cchip--terminal", "aria-pressed"), "true")
  // Keys go up through the bridge, never a socket of the page's own.
  await p.click("#terminal .xterm")
  await p.keyboard.type("ls")
  await p.keyboard.press("Enter")
  await p.waitForFunction(() => window.__mock.typed().includes("ls\r"))
  assert.equal(await p.evaluate(() => window.__mock.calls.filter((c) => c.cmd === "terminal_open").length), 1)
  if (process.env.SHOTS) await p.screenshot({ path: join(process.env.SHOTS, "b3-new-1280.png") })
  // The first message makes the chat, which takes the shell over: the same socket goes on.
  await p.click("#composer-text")
  await p.fill("#composer-text", "Build it")
  await p.click("#send")
  await p.waitForFunction(() => window.__mock.api("POST", "/chats").length === 1)
  const [made] = await p.evaluate(() => window.__mock.api("POST", "/chats"))
  assert.equal(made.args.body.device, "token1")
  assert.equal(made.args.body.directory, "/home/dev/project")
  await p.waitForSelector('#chat-tools [data-terminal-toggle][aria-pressed="true"]')
  assert.ok(await p.isVisible("#terminal"), "the panel stays open")
  const shells = await p.evaluate(() => window.__mock.terminals())
  assert.equal(shells.length, 1, "no second shell: the chat took the first one over")
  assert.ok(shells[0].open, "and its socket is still open")
  assert.deepEqual(p.errors, [])
})

test("B3: an open agent chat opens its own shell from the header; Send to chat fills the composer and sends nothing", async () => {
  const p = await page(b3())
  await openChatRow(p, "chat2")
  await p.click('#chat-tools [data-terminal-toggle]')
  await p.waitForFunction(() => window.__mock.terminals().length === 1)
  assert.deepEqual((await p.evaluate(() => window.__mock.terminals()))[0].target, { chat: "chat2", device: null, directory: null })
  await p.evaluate(() => window.__mock.shell("output", "\r\ntotal 4\r\n-rw-r--r-- 1 dev dev 12 build.log\r\n"))
  await p.waitForFunction(() => document.querySelector("#terminal .xterm-rows")?.textContent.includes("build.log"))
  await p.fill("#composer-text", "Look at this:")
  await p.click("#terminal-send")
  const text = await p.inputValue("#composer-text")
  assert.ok(text.startsWith("Look at this:\n\n```\n"), `after what was typed, as a block: ${JSON.stringify(text.slice(0, 40))}`)
  assert.match(text, /build\.log/)
  assert.equal(await p.evaluate(() => window.__mock.api("POST", "/chats/chat2/messages").length), 0, "nothing is sent")
  // Closing the panel keeps the shell; opening it again does not open another.
  await p.click("#terminal-close")
  assert.ok(await p.isHidden("#terminal"))
  await p.click('#chat-tools [data-terminal-toggle]')
  await p.waitForSelector("#terminal:not([hidden])")
  assert.equal(await p.evaluate(() => window.__mock.terminals().length), 1)
  // The server ends it: said, and no new shell in its place.
  await p.evaluate(() => window.__mock.shell("control", { t: "closed", message: "The shell exited." }))
  await p.waitForFunction(() => document.querySelector("#terminal-message").textContent === "The shell exited.")
  assert.equal(await p.evaluate(() => window.__mock.terminals().length), 1)
  assert.deepEqual(p.errors, [])
})

test("B3: the terminal and the activity panel take turns in the panel column", async () => {
  const p = await page(b3({ "GET /chats/chat2/activity": { activity: {} } }))
  await openChatRow(p, "chat2")
  await p.click('#chat-tools [data-terminal-toggle]')
  await p.waitForSelector("#terminal:not([hidden])")
  assert.equal(await p.getAttribute("#shell", "data-terminal"), "true")
  await p.click("#activity-open")
  await p.waitForSelector("#activity:not([hidden])")
  assert.ok(await p.isHidden("#terminal"), "the terminal gave way")
  assert.equal(await p.getAttribute("#shell", "data-terminal"), "false")
  await p.click('#chat-tools [data-terminal-toggle]')
  await p.waitForSelector("#terminal:not([hidden])")
  assert.ok(await p.isHidden("#activity"), "and the activity panel to it")
  assert.equal(await p.evaluate(() => window.__mock.terminals().length), 1, "the shell lived on behind it")
})

test("B3: no Terminal where the device opens none, for a chat on the server, or before a folder", async () => {
  const off = { "GET /devices": { devices: [{ id: "token1", name: "workbench", host: "workbench", platform: "linux", terminal: false }] } }
  let p = await page(b3(off))
  await p.click("#new-chat-btn")
  await p.click(".kind__tab >> text=Agent")
  await p.waitForSelector("#composer-chips .cchip")
  assert.equal(await p.locator("#composer-chips .cchip--terminal").count(), 0, "the device opens no terminal")
  await openChatRow(p, "chat2")
  assert.equal(await p.locator("#chat-tools [data-terminal-toggle]").count(), 0)
  await p.context().close()
  p = await page(b3({}))
  await p.click("#new-chat-btn")
  await p.click(".kind__tab >> text=Chat")
  await p.waitForSelector("#composer-chips .cchip")
  assert.equal(await p.locator("#composer-chips .cchip--terminal").count(), 0, "a chat on the server has no shell")
  await p.context().close()
  p = await page({ ...b3({}), status: status({ remote: { enabled: true, roots: [] } }) })
  await p.click("#new-chat-btn")
  await p.click(".kind__tab >> text=Agent")
  await p.waitForSelector("#composer-chips .cchip")
  assert.equal(await p.locator("#composer-chips .cchip--terminal").count(), 0, "no folder yet")
  assert.deepEqual(p.errors, [])
})

test("B3: a refused sign-in and an older server are said in words", async () => {
  let p = await page(b3({}, [["end", { code: 4401, reason: "not allowed", status: null, error: null }]]))
  await openChatRow(p, "chat2")
  await p.click('#chat-tools [data-terminal-toggle]')
  await p.waitForFunction(() => /Sign in again/.test(document.querySelector("#terminal-message").textContent))
  assert.ok(await p.evaluate(() => document.querySelector("#terminal-message").classList.contains("is-error")))
  await p.context().close()
  p = await page(b3({}, [["end", { code: null, reason: "", status: 404, error: null }]]))
  await openChatRow(p, "chat2")
  await p.click('#chat-tools [data-terminal-toggle]')
  await p.waitForFunction(() => /needs a newer LLeMbas server/.test(document.querySelector("#terminal-message").textContent))
  assert.deepEqual(p.errors, [])
})

test("B3: at 390 px the terminal is a sheet over the chat, inside the window", async () => {
  const p = await page(b3(), { width: 390, height: 844 })
  await p.evaluate(() => document.querySelector('.chatrow[data-id="chat2"]').click())
  await p.waitForSelector('#chat-tools [data-terminal-toggle]')
  await p.click('#chat-tools [data-terminal-toggle]')
  await p.waitForFunction(() => document.querySelector("#terminal .xterm-rows")?.textContent.includes("dev@workbench"))
  const box = await p.locator("#terminal").boundingBox()
  assert.ok(box.x >= 0 && box.x + box.width <= 390 && box.y + box.height <= 844, `inside: ${JSON.stringify(box)}`)
  const send = await p.locator("#terminal-send").boundingBox()
  assert.ok(send.x + send.width <= 390 && send.y + send.height <= 844, `Send is reachable: ${JSON.stringify(send)}`)
  const close = await p.locator("#terminal-close").boundingBox()
  assert.ok(close.x + close.width <= 390, "Close is reachable")
  assert.ok(await p.evaluate(() => document.documentElement.scrollWidth <= 390), "nothing scrolls sideways")
  if (process.env.SHOTS) await p.screenshot({ path: join(process.env.SHOTS, "b3-chat-390.png") })
  // Send to chat: the sheet steps aside, and the message box has the block.
  await p.click("#terminal-send")
  assert.ok(await p.isHidden("#terminal"))
  assert.match(await p.inputValue("#composer-text"), /dev@workbench/)
  assert.deepEqual(p.errors, [])
})

test("B3: at 1280 px the terminal sits beside the chat, which keeps its column", async () => {
  const p = await page(b3())
  await openChatRow(p, "chat2")
  await p.click('#chat-tools [data-terminal-toggle]')
  await p.waitForFunction(() => document.querySelector("#terminal .xterm-rows")?.textContent.includes("dev@workbench"))
  const term = await p.locator("#terminal").boundingBox()
  const main = await p.locator("#main").boundingBox()
  assert.ok(term.x >= main.x + main.width - 1, "beside, not over")
  assert.ok(main.width >= 400, `the chat keeps room: ${main.width}`)
  assert.ok(term.width >= 380, `the terminal has its width: ${term.width}`)
  if (process.env.SHOTS) await p.screenshot({ path: join(process.env.SHOTS, "b3-chat-1280.png") })
  assert.deepEqual(p.errors, [])
})

// --- B1: the progress line ---------------------------------------------------------------------
//
// Harness spec 3.4.0 (harness/progress.md in the LLeMbas CLI): one `progress` object, drawn by
// every client as `{{text}} · {{elapsed}}`. tests/ui/conformance/progress.json is a copy of the
// spec's conformance/progress.json (3.4.0); every case must come out word for word.

test("B1: every conformance case of the spec draws the same text and line", async () => {
  const { cases } = JSON.parse(readFileSync(join(HERE, "conformance", "progress.json"), "utf8"))
  const p = await page(b3())
  const got = await p.evaluate(async (cs) => {
    const m = await import("/js/progress.js")
    return cs.map((c) => ({ text: m.progressText(c.progress, c.now), line: m.progressLine(c.progress, c.now) }))
  }, cases)
  cases.forEach((c, i) => assert.deepEqual(got[i], c.expect, c.about))
  assert.deepEqual(p.errors, [])
})

test("B1: a reply being written draws the stream's progress, its clock moving, and the status text without one", async () => {
  const p = await page(agentChatOpen([["status", { text: "Writing…" }]]))
  await openChatRow(p, "chat2")
  await p.waitForSelector(".msg.is-live .msg__status")
  await p.evaluate((path) => {
    window.__mock.frame(path, "status", { text: "Running bake --slow", progress: { phase: "running_tool", since: Date.now() - 65000, tool: "bash", what: "bake --slow" } })
  }, STREAM2)
  const line = () => p.textContent(".msg.is-live .msg__status")
  assert.equal(await line(), "Running bash: bake --slow · 1m 05s")
  assert.equal(await p.getAttribute(".msg.is-live .msg__status", "data-phase"), "running_tool")
  await p.waitForFunction(() => document.querySelector(".msg.is-live .msg__status").textContent.endsWith("1m 06s"), null, { timeout: 2500 })
  // A data-only frame with progress (the ask frame carries it too): the line follows.
  await p.evaluate((path) => window.__mock.frame(path, "ask", { cards: [], progress: { phase: "waiting_for_person", since: Date.now(), what: "approval", tool: "bash" } }), STREAM2)
  assert.equal(await line(), "Waiting for you: allow bash? · 0s")
  // Nothing running: `progress: null`, and the status text is drawn again.
  await p.evaluate((path) => window.__mock.frame(path, "status", { text: "Writing…", progress: null }), STREAM2)
  assert.equal(await line(), "Writing…")
  // An older server sends no progress at all: its status text, as before.
  await p.evaluate((path) => window.__mock.frame(path, "status", { text: "Running bake --slow" }), STREAM2)
  assert.equal(await line(), "Running bake --slow")
  // Stopped and failed have no clock.
  await p.evaluate((path) => window.__mock.frame(path, "status", { text: "Stopped.", progress: { phase: "stopped", since: Date.now() - 4000, reason: "person" } }), STREAM2)
  assert.equal(await line(), "Stopped: by you")
  assert.deepEqual(p.errors, [])
})

// --- C4 (ahead of the server): the subagent tree as spec 3.4.0 §12 gives it ---------------------
//
// ui/js/tree.js draws subagents.md §12's data; the activity panel takes it up once the server's
// /api/v2 carries the tree. Until then it is checked here on the spec's own example.

const TREE = {
  min: 2, max: 4, size: 3, open_slots: 1,
  agents: [
    { id: "lead", name: "lead", position: "the main agent", parent: null, state: "working", model: "qwen-27b", mode: "edit", request: [], manager: true, context: { used: 41200, window: 131072 }, progress: { phase: "thinking", since: 0 } },
    { id: "s1", name: "parser", position: "reviews the parser", parent: "lead", state: "working", model: "qwen-27b", mode: "manual", request: ["write"], manager: true, task: "Read src/parse.ts", context: { used: 9100, window: 131072 }, progress: { phase: "running_tool", since: 0, tool: "read", what: "src/parse.ts" }, findings: 2, messages: 3 },
    { id: "s3", name: "lexer", position: "the lexer's tests", parent: "s1", state: "waiting", model: "qwen-27b", mode: "manual", request: [], manager: false, context: { used: 0, window: 131072 }, progress: null, findings: 0, messages: 0 },
  ],
  ended: [{ id: "s0", name: "scout", position: "maps the repository", parent: "lead", state: "out_of_context", ended: 0, findings: 1 }],
}

test("C4: the tree in order, each agent's position, state, mode, context and phase; slots; the ended ones apart", async () => {
  const p = await page(b3())
  const got = await p.evaluate(async (tree) => {
    const m = await import("/js/tree.js")
    const calls = []
    const box = m.treePart(tree, { room: [{ n: 1, from: "lead", to: ["parser"], text: "Start with the grammar.\nThen the lexer." }], now: 65000, act: { open: (a) => calls.push(["open", a.id]), findings: (a) => calls.push(["findings", a.id]), stop: (a) => calls.push(["stop", a.id]) } })
    document.body.append(box)
    const rows = [...box.querySelectorAll(".subagents__list > .subagent:not(.subagent--slot)")].map((r) => ({ id: r.dataset.id, depth: r.style.getPropertyValue("--depth"), text: r.textContent }))
    box.querySelector('[data-id="s1"] .subagent__actions .btn').click()
    box.querySelector('[data-id="s0"] .subagent__actions .btn:last-child').click()
    box.querySelector('[data-id="s1"] .agent__stop').click()
    return { rows, slots: box.querySelectorAll(".subagent--slot").length, endedStop: box.querySelectorAll('[data-id="s0"] button.agent__stop').length, calls }
  }, TREE)
  assert.deepEqual(got.rows.map((r) => [r.id, r.depth]), [["lead", "0"], ["s1", "1"], ["s3", "2"], ["s0", "0"]])
  const parser = got.rows[1].text
  assert.match(parser, /parser \(s1\) — reviews the parser/)
  assert.match(parser, /6%/, "context: floor(9100 × 100 / 131072)")
  assert.match(parser, /manual \+ write/)
  assert.match(parser, /Running read: src\/parse\.ts · 1m 05s/)
  assert.match(parser, /Messages: 3/)
  assert.match(parser, /lead: Start with the grammar\./)
  assert.match(got.rows[2].text, /waiting for a slot/)
  assert.match(got.rows[3].text, /out of context/)
  assert.equal(got.slots, 1)
  assert.equal(got.endedStop, 0, "an ended subagent cannot be stopped")
  assert.deepEqual(got.calls, [["open", "s1"], ["findings", "s0"], ["stop", "s1"]])
  assert.deepEqual(p.errors, [])
})

// --- Run ----------------------------------------------------------------------------------------

const only = process.argv[2] || ""
browser = await launch()
let failed = 0
for (const { name, fn } of tests) {
  if (only && !name.includes(only)) continue
  try {
    await fn()
    console.log(`ok   ${name}`)
  } catch (err) {
    failed++
    console.log(`FAIL ${name}\n     ${String(err?.stack || err).split("\n").slice(0, 6).join("\n     ")}`)
  }
}
await browser.close()
console.log(failed ? `tests/ui: ${failed} failed` : "tests/ui: all passed")
process.exit(failed ? 1 : 0)