MeshTerm/tests/test_records_screen.py

# SPDX-License-Identifier: Apache-2.0
"""Trophy-case dialog tests: one record's full story, headless.

Driven like the other screen tests — ``render_body`` is pure lines-out and ``handle``
pure state — so the stats lanes, the route, and the renamed *Trace this path* action
are all assertable without a terminal.
"""

from __future__ import annotations

import asyncio
import io
import re
from datetime import datetime, timezone
from pathlib import Path

import pytest
from rich.cells import cell_len
from rich.console import Console

from meshterm.context import AppContext
from meshterm.core.admin_store import AdminStore
from meshterm.core.config import Settings
from meshterm.core.device_store import DeviceStore
from meshterm.persistence.repository import DiscoveredPath, Repository
from meshterm.services.records import CATEGORIES, CATEGORY_BY_ID
from meshterm.ui.records_screen import (
    RecordScreen,
    WalkVertex,
    discipline_label,
    discipline_lane,
    open_records,
)
from meshterm.ui.surface import TuiUi
from meshterm.ui.tui import frame
from meshterm.ui.tui.prompt import TypedConfirmDialog
from meshterm.ui.tui.screen import CANCEL
from meshterm.ui.tui.select import SelectScreen
from meshterm.ui.tui.session import TuiSession
from meshterm.ui.widgets import node_marker, self_marker
from tests.conftest import plain as _plain  # THE strip-and-join screen reader

HUB_ID, FAR_ID = "3d63c6429436", "f2c24f54551e"


def _loop_shape() -> list[WalkVertex]:
    """A three-point circuit — us and two positioned hops — enough to enclose an area."""
    sglyph, scolor = self_marker()
    hglyph, hcolor = node_marker(2)  # a repeater
    nglyph, ncolor = node_marker(1)  # a plain node
    return [
        WalkVertex(0.0, 0.0, sglyph, scolor, True),
        WalkVertex(2.0, 1.0, hglyph, hcolor, False, label=HUB_ID[:2]),
        WalkVertex(1.0, 3.0, nglyph, ncolor, False, label=FAR_ID[:2]),
    ]


def _resolve(hop: str) -> str:
    return {HUB_ID: "Hilltop-Repeater", FAR_ID: "Far"}.get(hop, hop)


def _record(**kw) -> DiscoveredPath:
    defaults = dict(
        id=1,
        category="grand_tour",
        width_bytes=1,
        spec="3d,f2",
        route=(HUB_ID, FAR_ID),
        score=2.0,
        stats={
            "hop_count": 2,
            "distinct_nodes": 2,
            "repeats": False,
            "min_snr": 6.0,
            "km_travelled": 3.2,
            "km_complete": True,
            "far_km": 1.5,
            "rtt_ms": 250.0,
        },
        app_version="0.1.0",
        discovered_at=datetime(2026, 7, 12, 14, 30, tzinfo=timezone.utc),
    )
    defaults.update(kw)
    return DiscoveredPath(**defaults)


def _dialog(record: DiscoveredPath, rank: int = 1, **kw) -> RecordScreen:
    return RecordScreen(
        record,
        CATEGORY_BY_ID[record.category],
        rank,
        resolve=_resolve,
        device_label="Homestead",
        device_hash=None,
        **kw,
    )


def test_record_dialog_shows_stats_route_and_the_trace_action() -> None:
    """Score in the category's unit, the resolved route bracketed by us, and actions."""
    screen = _dialog(_record())
    info = _plain(screen.render_body(60))
    assert "2 nodes" in info  # the score, in the discipline's own unit
    assert "Trace this path" in info  # the renamed action (was "Walk again")
    assert "Walk again" not in info
    assert "Delete record" in info
    assert "Back" not in info  # no exit row: Esc leaves the page
    screen.handle("tab")
    route = _plain(screen.render_body(60))
    assert "Hilltop-Repeater" in route  # a resolved relay on the route
    assert "Homestead" in route  # us, bracketing the walked route
    assert "Trace this path" in route and "Delete record" not in route  # Enter here traces


def test_record_dialog_draws_the_walk_as_a_route_graph() -> None:
    """The walk is drawn on THE route graph — us starred at both ends, over a caption."""
    screen = _dialog(_record())
    screen.handle("tab")  # the Route tab
    lines = _plain(screen.render_body(60)).splitlines()
    legend = next(i for i, line in enumerate(lines) if "▲ repeater" in line)
    assert "you → … → you" in lines[legend - 1] and "labels = hash byte" in lines[legend - 1]
    graph = "\n".join(lines[_strip_end(lines) : legend - 1])  # the drawing, up to its caption
    assert graph.count("★") == 2  # our node marks both endpoints of the round trip
    assert any("⠀" <= ch <= "⣿" for ch in graph)  # braille edges are drawn


def test_record_graph_is_only_as_tall_as_one_lane_needs() -> None:
    """A walk is one path: the marker row, plus a label row only where a label landed.

    The shared widget's default floor (5) reserves room for a fan of alternatives; nothing
    here ever fans, so the walk sat in rows of blank canvas and pushed the route and the
    actions down the card for nothing.
    """
    for record in (_record(), _record(route=(HUB_ID, FAR_ID, HUB_ID, FAR_ID, HUB_ID))):
        lines = _dialog(record)._graph_lines(60)  # however many relays: still one lane
        assert 0 < len(lines) <= 3
        assert all(_plain([line]).strip() for line in lines)  # not a blank row among them


def test_record_dialog_route_runs_unlabelled_across_the_whole_card() -> None:
    """The route is THE path widget at full width — no ``route`` lane eating twelve cells.

    Under a graph captioned ``you → … → you``, the line *is* the route; the label lane only
    cost hops. It wraps at hop boundaries, so a long walk folds instead of truncating, and
    our own two ends stand on the ★ the graph above already marks us with.
    """
    dialog = _dialog(_record(route=tuple([HUB_ID, FAR_ID] * 4)))
    dialog.handle("tab")  # the Route tab
    body = _plain(dialog.render_body(60)).splitlines()
    # The route closes the Route tab's stage: it runs from under the graph's legend to
    # the blank line before the action row.
    legend_at = next(i for i, line in enumerate(body) if "▲ repeater" in line)
    route = body[legend_at + 1 : body.index("", legend_at)]
    assert not route[0].startswith("route")  # no label lane
    assert route[0].startswith("★")  # our end opens the walk on the app-wide star…
    assert route[-1].endswith("★")  # …and closes it on the same
    assert "Homestead" not in "".join(route)  # never our name, and never our key
    assert "Hilltop-Repeater" in "".join(route)  # the hops themselves are named in full
    assert len(route) > 1  # it folded rather than truncating…
    # …every fold hanging under the step.
    assert all(line.startswith("  ") for line in route[1:])


def test_record_dialog_shows_the_node_type_legend() -> None:
    """The standard node-type key sits under the graph, so its markers read."""
    screen = _dialog(_record())
    screen.handle("tab")  # the Route tab
    body = _plain(screen.render_body(60))
    assert "★ you" in body and "▲ repeater" in body and "◉ sensor" in body


def test_record_dialog_legend_breaks_between_entries_on_a_picocalc_width() -> None:
    """At 53 cells the legend takes two lines, and no mark is parted from its name.

    The full names run to 59 cells on one line, so cropping would cut "sensor" off the
    PicoCalc; breaking inside an entry would leave a glyph at the end of one line and its
    name at the start of the next.
    """
    screen = _dialog(_record())
    screen.handle("tab")  # the Route tab
    body = _plain(screen.render_body(53))
    for entry in ("★ you", "▲ repeater", "● companion", "■ room server", "◉ sensor"):
        assert entry in body
    assert all(cell_len(line) <= 53 for line in body.splitlines())


def test_record_graph_marks_a_repeater_relay_with_its_triangle() -> None:
    """A relay whose type is a repeater draws ▲, not the generic ● dot."""
    dialog = _dialog(_record(), type_of=lambda h: 2 if h == HUB_ID else None)
    graph = _plain(dialog._graph_lines(60))
    assert "▲" in graph  # the repeater relay, in its map glyph


def test_record_graph_collapses_a_revisited_route_to_distinct_nodes() -> None:
    """A revisited route collapses to its distinct nodes in the record graph.

    A boomerang that doubles back seats each node once, the depth graph being unable
    to stack a node on itself, so it draws the same graph as its distinct route does.
    """
    looping = _dialog(_record(route=(HUB_ID, FAR_ID, HUB_ID)))
    distinct = _dialog(_record(route=(HUB_ID, FAR_ID)))
    assert looping._graph_lines(60) == distinct._graph_lines(60)
    graph = _plain(looping._graph_lines(60))
    assert "3d" in graph and "f2" in graph  # both distinct relays labelled, neither piled


def test_record_dialog_title_names_the_discipline_and_rank() -> None:
    """The bar says only what kind of page this is; the header line names the record."""
    screen = _dialog(_record(), rank=3)
    assert screen.title == "Record"
    assert (
        _plain(screen.render_body(60)).splitlines()[0].endswith("Most nodes — 3rd place: 2 nodes")
    )


def test_record_dialog_marks_incomplete_distance_as_a_lower_bound() -> None:
    """A Longest-distance walk with an unpositioned hop reads ``≥``, never exact."""
    record = _record(
        category="long_haul",
        score=8.4,
        stats={"km_travelled": 8.4, "km_complete": False, "hop_count": 3, "distinct_nodes": 3},
    )
    body = _plain(_dialog(record).render_body(60))
    assert "≥ 8.4 km" in body


def test_record_dialog_enter_commits_the_trace_action() -> None:
    """The cursor opens on Trace this path, so Enter hands back ``"trace"``."""
    dialog = _dialog(_record())
    captured: list = []
    dialog.resolve = captured.append  # type: ignore[method-assign]
    assert dialog._actions[dialog._index] == "trace"
    dialog.handle("enter")
    assert captured == ["trace"]


def test_record_dialog_down_moves_to_delete() -> None:
    """↑/↓ walk the action rows in order."""
    dialog = _dialog(_record())
    dialog.handle("down")
    assert dialog._actions[dialog._index] == "delete"


def test_record_dialog_actions_start_both_labels_in_the_same_cell() -> None:
    """*Trace this path* and *Delete record…* share one icon column, on both platforms.

    ``👣`` is two cells and ``🗑`` one, so each mark measured on its own left the delete
    row's words a column left of the trace row's. Measured in cells, not characters, since
    it is the cell the words land in that the eye compares. Where the platform draws no icon
    lane the marks go, and so must their padding: both labels open right after the pointer.
    """
    from meshterm.platforms import PICOCALC, set_platform

    def starts() -> set[int]:
        lines = _plain(_dialog(_record()).render_body(60)).splitlines()
        rows = [
            line[: line.index(word)]
            for word in ("Trace this path", "Delete record…")
            for line in lines
            if word in line
        ]
        assert len(rows) == 2, lines
        return {cell_len(head) for head in rows}

    regular = starts()
    assert len(regular) == 1  # one column for both words…
    assert regular == {2 + 2 + 1}  # …after the pointer, the two-cell lane, and its space

    set_platform(PICOCALC)
    assert starts() == {2}  # no lane, no leftover padding: the words follow the pointer


def test_record_dialog_names_the_far_point() -> None:
    """The reached node's name rides beside the far-point distance."""
    body = _plain(_dialog(_record(), far_label="Far").render_body(60))
    assert re.search(r"far point\s+1\.5 km\s+Far", body)


def test_record_dialog_names_the_link_the_longest_leg_spanned() -> None:
    """The leg lane carries its distance and the two nodes it crossed between."""
    record = _record(
        category="long_leg",
        score=12.4,
        stats={
            "hop_count": 2,
            "distinct_nodes": 2,
            "km_travelled": 21.0,
            "km_complete": True,
            "leg_km": 12.4,
            "leg_link": [HUB_ID, FAR_ID],
        },
    )
    body = _plain(_dialog(record).render_body(60))
    assert re.search(r"longest leg\s+12\.4 km\s+Hilltop-Repeater → Far", body)


def test_record_dialog_stars_our_own_end_of_the_longest_leg() -> None:
    """A leg that leaves home takes the app-wide ★ at our end, never our name."""
    record = _record(
        category="long_leg",
        score=12.4,
        stats={"hop_count": 1, "distinct_nodes": 1, "leg_km": 12.4, "leg_link": [None, HUB_ID]},
    )
    lane = next(
        line
        for line in _plain(_dialog(record).render_body(60)).splitlines()
        if "longest leg" in line
    )
    assert "★ → Hilltop-Repeater" in lane and "Homestead" not in lane


def test_record_dialog_skips_the_leg_lane_for_a_record_stored_without_one() -> None:
    """Records set before the discipline existed simply have no leg to show."""
    body = _plain(_dialog(_record()).render_body(60))
    assert "longest leg" not in body


def test_record_dialog_shows_reliability_when_the_far_node_has_history() -> None:
    """The reliability lane reads the % and its sample count; absent without history."""
    with_rate = _plain(_dialog(_record(), reliability=(0.875, 7, 8)).render_body(60))
    assert re.search(r"reliability\s+88%", with_rate)
    assert "7/8" in with_rate
    without = _plain(_dialog(_record()).render_body(60))
    assert "reliability" not in without


def _is_braille(ch: str) -> bool:
    return chr(0x2800) <= ch <= chr(0x28FF)


def _strip_end(lines: list[str]) -> int:
    """The index just past the tab strip's rows.

    A two-tab strip closes on its bottom rule — the one row that turns up into the active
    tab's wall (``╯``); a lone tab collapses to a ``── Stats ──`` heading, one row.
    """
    for i, line in enumerate(lines):
        if "╯" in line or "── " in line:
            return i + 1
    raise AssertionError(f"no tab strip in {lines[:5]}")


def test_record_opens_on_info_with_route_and_area_tabs_beside_it() -> None:
    """A drawable walk gets three tabs — Info, Route, Area — and opens on Info.

    Organized like the node page: the strip is the page's title, so the stats open
    directly under it (identity first) with the page's actions at the foot, and nothing
    of the route or the ground is drawn on this tab — each has a tab of its own.
    """
    screen = _dialog(_record(), far_label="Far", shape=_loop_shape())
    lines = _plain(screen.render_body(58)).splitlines()
    strip = "\n".join(lines[: _strip_end(lines)])
    assert "Info" in strip and "Route" in strip and "Area" in strip, "all three boxed"
    body = [line for line in lines[_strip_end(lines) :] if line]
    assert body[0].startswith("spec") and body[1].startswith("recorded")  # identity first
    assert body[2].startswith("walk")  # the score is the header, not a lane
    assert "Trace this path" in "\n".join(body) and "Delete record" in "\n".join(body)
    assert not any(_is_braille(ch) for line in body for ch in line), "no drawing here"
    assert "Hilltop-Repeater" not in "\n".join(body), "the route has a tab of its own"
    assert "Far" in "\n".join(body)  # the far-point name is a stat, not a drawing label


def test_record_header_names_the_discipline_the_standing_and_the_metric() -> None:
    """One line above the tabs: ``<mark> <discipline> — <nth> place: <score>``.

    The node page's identity header, for a record. The discipline is written the way its
    board heading writes it — the mark padded to the measured lane, so a one-cell ``🛣``
    and a two-cell ``🎯`` start their titles in the same cell — and the score lane that
    used to repeat the metric on Info is gone.
    """
    from meshterm.ui.records_screen import discipline_label, discipline_lane

    screen = _dialog(_record(), shape=_loop_shape())
    lines = _plain(screen.render_body(58)).splitlines()
    grand_tour = CATEGORY_BY_ID["grand_tour"]
    expected = f"{discipline_label(grand_tour, discipline_lane())} — 1st place: 2 nodes"
    assert lines[0] == expected  # the very first row, before the strip's air
    assert "score" not in _plain(screen.render_body(58))
    for _ in range(3):  # the header stays put whichever tab is up
        screen.handle("tab")
        assert _plain(screen.render_body(58)).splitlines()[0] == expected

    partial = _record(
        category="long_haul",
        score=8.4,
        stats={"km_travelled": 8.4, "km_complete": False, "hop_count": 3, "distinct_nodes": 3},
    )
    head = _plain(_dialog(partial, rank=5).render_body(58)).splitlines()[0]
    assert head.endswith("Longest distance — 5th place: ≥ 8.4 km")  # the board's bounded spelling

    # The mark lane is the board heading's: the two marks' titles start in one cell.
    long_haul = CATEGORY_BY_ID["long_haul"]
    assert cell_len(discipline_label(long_haul, discipline_lane()).split("Longest")[0]) == cell_len(
        discipline_label(grand_tour, discipline_lane()).split("Most")[0]
    )


def test_record_route_tab_draws_the_walk_and_enter_traces_it() -> None:
    """The Route tab: the graph over the route line, with Trace this path as its one row.

    The node page's rule for its Routes tab — Enter on the route on show arms its trace —
    so the tab carries that action alone; the page's Delete stays on Info.
    """
    screen = _dialog(_record(), far_label="Far", shape=_loop_shape())
    screen.handle("tab")
    lines = _plain(screen.render_body(58)).splitlines()
    stage = [line for line in lines[_strip_end(lines) :] if line]
    assert "▲ repeater" in "\n".join(stage)  # the graph's key
    assert any(line.startswith("★") and line.endswith("★") for line in stage)  # the route line
    assert stage[-1].endswith("Trace this path — reopen in Trace path")
    assert "Delete record" not in "\n".join(stage)
    assert "spec" not in "\n".join(stage), "the stats have a tab of their own"
    captured: list = []
    screen.resolve = captured.append  # type: ignore[method-assign]
    screen.handle("enter")
    assert captured == ["trace"]


def test_record_area_tab_fills_the_stage_with_hash_byte_pins() -> None:
    """⇧Tab turns to the Area tab: the ground, pinned and labelled, sized to the viewport.

    The drawing used to ride beside the stats in a third of the width, unlabelled — there
    was no cell for a label. It has a tab of its own now and spends every row the strip
    leaves, so a pin and the graph node on the Route tab can be matched by their shared
    byte, and a taller terminal is a bigger shape.
    """
    screen = _dialog(_record(), far_label="Far", shape=_loop_shape())
    screen.note_metrics(40, 24)
    screen.handle("shift_tab")  # Info → Area, the last tab
    lines = _plain(screen.render_body(58)).splitlines()
    stage = [line for line in lines[_strip_end(lines) :] if line]
    block = "\n".join(stage)
    assert any(_is_braille(ch) for ch in block)  # the area, in braille
    assert "★" in block  # us pinned at the origin
    assert "▲" in block  # the repeater vertex, in its map glyph
    assert HUB_ID[:2] in block and FAR_ID[:2] in block  # each hop's hash byte beside its pin
    assert stage[-1] == "north up · labels = hash byte"  # the caption reads the drawing back
    assert "Trace this path" not in block  # a picture: no action rows
    assert len(lines) <= 24, "the Area tab never outgrows the viewport"

    screen.note_metrics(40, 40)
    taller = _plain(screen.render_body(58)).splitlines()
    assert len(taller) > len(lines), "a taller viewport is a taller drawing"

    screen.handle("tab")  # …and round to Info again
    assert "Delete record" in _plain(screen.render_body(58))


def test_record_area_drawing_spends_the_width_it_is_given() -> None:
    """The drawing is as wide as the page: a wider page is a bigger, not a padded, shape."""

    def drawn_width(width: int) -> int:
        screen = _dialog(_record(), shape=_loop_shape())
        # Rows enough that the shape's proportions bind on the width, not the height.
        screen.note_metrics(40, 40)
        screen.handle("shift_tab")  # the Area tab
        lines = _plain(screen.render_body(width)).splitlines()
        return max(len(line.rstrip()) for line in lines[_strip_end(lines) : -1])

    assert drawn_width(72) > drawn_width(40)


def test_record_area_tab_says_so_when_too_narrow_to_draw() -> None:
    """Below the drawing's floor the Area tab says why it is empty instead of squeezing."""
    screen = _dialog(_record(), far_label="Far", shape=_loop_shape())
    screen.handle("shift_tab")  # the Area tab
    body = _plain(screen.render_body(12))
    assert not any(_is_braille(ch) for ch in body)
    assert "no room" in body  # cut at the edge like any row, but there


def test_record_without_a_shape_has_no_area_tab() -> None:
    """No positioned hops, no Area tab: Info and Route still switch between themselves."""
    screen = _dialog(_record())
    lines = _plain(screen.render_body(60)).splitlines()
    strip = "\n".join(lines[: _strip_end(lines)])
    assert "Info" in strip and "Route" in strip and "Area" not in strip
    screen.handle("shift_tab")
    assert screen._tab == "Route"


def test_record_footer_names_only_what_each_tab_answers() -> None:
    """Info hints the cursor keys, Route only Enter (one row), Area only the switch and Esc."""
    screen = _dialog(_record(), shape=_loop_shape())
    assert screen.footer_hint == "Tab/⇧Tab switch · ↑↓ move · Enter select · Esc back"
    screen.note_metrics(40, 10)  # taller than the viewport: the pager earns its atom
    assert "PgUp/PgDn scroll" in screen.footer_hint
    screen.handle("tab")
    screen.note_metrics(10, 24)
    assert screen.footer_hint == "Tab/⇧Tab switch · Enter select · Esc back"
    screen.handle("tab")
    assert screen.footer_hint == "Tab/⇧Tab switch · Esc back"
    screen.handle("down")  # inert on the Area tab
    assert screen._index == 0


def test_record_dialog_scrolls_free_of_the_action_cursor() -> None:
    """PgUp/PgDn/Home/End scroll the card; the action cursor stops following."""
    dialog = _dialog(_record(), shape=_loop_shape())
    dialog.note_metrics(40, 10)  # a body taller than the viewport
    assert dialog.cursor_line() is None  # opens at the top, free of the cursor
    dialog.handle("pagedown")
    assert dialog.scroll > 0 and not dialog._follow
    dialog.handle("end")
    assert dialog.scroll == 30  # total 40 − viewport 10
    dialog.handle("home")
    assert dialog.scroll == 0


def test_record_dialog_arrows_follow_the_action_cursor() -> None:
    """An arrow re-arms cursor-follow so the selected action is kept in view."""
    dialog = _dialog(_record())
    dialog.handle("pagedown")  # into free-scroll
    assert not dialog._follow
    dialog.handle("down")
    assert dialog._follow
    dialog.render_body(60)  # the frame renders before reading the cursor
    assert dialog.cursor_line() is not None


# --- the browser loop: dialogs float over the trophy case, never a blank frame ------


@pytest.fixture()
def tui_ctx(tmp_path: Path) -> AppContext:
    """A mock-backed context wired to a headless TUI session (no prompt_toolkit app)."""
    settings = Settings(config_dir=tmp_path, db_path=tmp_path / "records.db")
    ctx = AppContext(
        console=Console(file=io.StringIO()),
        settings=settings,
        repo=Repository(settings.db_path),
        device_store=DeviceStore(tmp_path / "devices.json"),
        admin_store=AdminStore(tmp_path / "admin.json"),
        mock=True,
    )
    ctx.ui = TuiUi(TuiSession())
    yield ctx
    ctx.repo.close()


async def _step_until(predicate, *, limit: int = 200):
    """Yield to the event loop until ``predicate()`` is truthy; return it (or its last value)."""
    value = predicate()
    for _ in range(limit):
        if value:
            return value
        await asyncio.sleep(0)
        value = predicate()
    return value


def _trophy_case(session, *, other_than=None):
    """The trophy-case browser on top of the stack, if it is the frontmost screen."""
    top = session.top
    if isinstance(top, SelectScreen) and top.title == "Trophy case" and top is not other_than:
        return top
    return None


async def test_the_trophy_case_fills_the_frame_over_a_trace_too(tui_ctx) -> None:
    """The trophy case is a place, so it is full-frame whichever way in.

    From the menu it is the only screen and was drawn full-frame by the compositor's
    fallback; opened from a trace — over the still-pushed trace screen — the same list
    came up as a content-sized box, because a bare ``SelectScreen`` floats by default.
    """
    from meshterm.ui.tui.screen import ScrollScreen

    ctx = tui_ctx
    session = ctx.ui.session
    trace = ScrollScreen("", title="Trace — Lakeside", floating=False)
    session.push(trace)

    task = asyncio.ensure_future(open_records(ctx))
    try:
        browser = await _step_until(lambda: _trophy_case(session))
        assert browser is not None, "the trophy case list never opened"
        assert not browser.floating
        assert session._base_screen() is browser, "the page fills the frame, not a box over it"
        assert not session._has_float()
        browser.handle("escape")
        await task
        assert session._base_screen() is trace, "and Esc lands back on the trace"
    finally:
        if not task.done():
            task.cancel()
        session.pop(trace)


async def test_delete_all_confirm_floats_over_the_browser(tui_ctx) -> None:
    """The trophy case stays drawn full-frame behind the "Delete all records" confirm.

    Regression: the browser was run *then popped* before the confirm opened, so the confirm
    floated over a blank frame — the background "cleared". The browser never leaves the stack
    now (``session.stay``), so it is the full-frame base while the red typed-delete gate
    floats over it, and backing out returns to the very same screen — cursor included —
    rather than to a rebuilt one.
    """
    ctx = tui_ctx
    session = ctx.ui.session
    ctx.repo.record_discovery(
        "grand_tour",
        1,
        "3d,f2",
        (HUB_ID, FAR_ID),
        score=2.0,
        stats={"hop_count": 2, "distinct_nodes": 2},
        app_version="0.1.0",
    )

    task = asyncio.ensure_future(open_records(ctx))
    try:
        browser = await _step_until(lambda: _trophy_case(session))
        assert browser is not None, "the trophy case list never opened"

        browser.resolve(("del_all", None, 0, None))  # choose "Delete all records"
        confirm = await _step_until(
            lambda: session._float_layers()[0] if session._has_float() else None
        )
        assert isinstance(confirm, TypedConfirmDialog)  # the red typed-delete gate
        assert session._base_screen() is browser  # the browser is still the full-frame base

        confirm.resolve(CANCEL)  # Esc — back out without deleting
        again = await _step_until(lambda: _trophy_case(session))
        assert again is browser, "nothing was deleted, so the same screen carries on"
        again.handle("escape")  # Esc leaves the trophy case
        result = await task
    finally:
        if not task.done():
            task.cancel()

    assert result == {"records": 1}  # backed out — the record still stands


async def test_delete_a_disciplines_records_is_a_popup_over_the_browser(tui_ctx) -> None:
    """Picking a discipline to delete floats a popup over the browser, not a full-screen list.

    The discipline picker is a floating :class:`SelectScreen`; with the browser kept on the
    stack it draws as a centered popup over the visible trophy case (``_base_screen`` stays
    the browser) instead of replacing the whole frame.
    """
    ctx = tui_ctx
    session = ctx.ui.session
    ctx.repo.record_discovery(
        "grand_tour",
        1,
        "3d,f2",
        (HUB_ID, FAR_ID),
        score=2.0,
        stats={"hop_count": 2, "distinct_nodes": 2},
        app_version="0.1.0",
    )

    task = asyncio.ensure_future(open_records(ctx))
    try:
        browser = await _step_until(lambda: _trophy_case(session))
        assert browser is not None

        browser.resolve(("del_cat", None, 0, None))  # "Delete a discipline's records…"
        picker = await _step_until(
            lambda: session._float_layers()[0] if session._has_float() else None
        )
        assert isinstance(picker, SelectScreen)  # a floating popup, not the frame
        assert picker.title == "Delete a discipline's records"
        assert session._base_screen() is browser  # the browser stays behind it

        picker.resolve(CANCEL)  # Esc — abandon the pick
        again = await _step_until(lambda: _trophy_case(session))
        assert again is browser, "the pick was abandoned, so the same screen carries on"
        again.handle("escape")  # Esc
        result = await task
    finally:
        if not task.done():
            task.cancel()

    assert result == {"records": 1}


async def test_a_board_row_spends_its_cells_on_the_walk(tui_ctx) -> None:
    """A record row leads with rank/day/score, then the walk with both ends bare.

    Every record is a boomerang, so naming ourselves at both ends said nothing twice a row
    and cost more cells than the whole score lane; the ends go to ``★`` and the score lane
    is fitted to this board's own widest score instead of a fixed twelve.
    """
    ctx = tui_ctx
    session = ctx.ui.session
    ctx.repo.record_discovery(
        "grand_tour",
        1,
        "3d,f2",
        (HUB_ID, FAR_ID, HUB_ID),
        score=2.0,
        stats={"hop_count": 3, "distinct_nodes": 2},
        app_version="0.1.0",
    )

    task = asyncio.ensure_future(open_records(ctx))
    try:
        browser = await _step_until(lambda: _trophy_case(session))
        assert browser is not None
        label = next(
            choice.label
            for choice in browser._choices()
            if isinstance(choice.value, tuple) and choice.value[0] == "open"
        )
        row = label.plain
        assert row.startswith("#1 ")  # the standing on the board
        assert "2 nodes" in row  # the score, in the discipline's unit
        assert row.count("★") == 2  # our two ends, bare — never named twice a row
        assert "Homestead" not in row  # …so the device name is nowhere on the line
        # And those ends are *us*, in the you white — nothing here is ours to compose, so
        # there is no "not yours" fade to wear.
        stars = [s for s in label.spans if row[s.start : s.end] == "★"]
        assert [str(s.style) for s in stars] == ["you", "you"]
        assert "3d" in row and "f2" in row  # the hops, at the record's own hash width
        # The lanes before the walk are held to what they say: a score lane fitted to this
        # board's widest score (no dead padding), and the day without the minute the dialog
        # carries — every cell they don't spend is a hop the route gets to show.
        assert "2 nodes  ★" in row
        assert ":" not in row[: row.index("★")]
    finally:
        if not task.done():
            task.cancel()


async def test_the_board_pins_its_discipline_heading_and_description(tui_ctx) -> None:
    """Scrolling into a board keeps its ``── discipline ──`` heading *and* description overhead.

    Every discipline heading is followed by its word-wrapped description — what that board
    scores, which is exactly what a reader partway down it needs. The two pin as one block:
    with every separator a pinning candidate, the *last muted line* under a heading won the
    top row on its own and the heading never stuck — the first discipline's least of all,
    since its description is what the very first scrolled row sits under.
    """
    ctx = tui_ctx
    session = ctx.ui.session
    for i in range(6):  # one full board, so its records outlast a short viewport
        ctx.repo.record_discovery(
            "grand_tour",
            1,
            f"3d,{i:02x}",
            (HUB_ID, FAR_ID),
            score=float(i + 1),
            stats={"hop_count": 2, "distinct_nodes": 2},
            app_version="0.1.0",
        )

    task = asyncio.ensure_future(open_records(ctx))
    try:
        browser = await _step_until(lambda: _trophy_case(session))
        assert browser is not None
        # Exactly the six disciplines are landmarks, each block led by its own heading and
        # carrying the description written under it — nothing else is a candidate.
        browser.render_body(72)
        blocks = [
            [_plain([line]).strip() for line in rows] for _idx, rows in browser._sticky_headers
        ]
        lane = discipline_lane()
        assert [rows[0] for rows in blocks] == [
            f"── {discipline_label(c, lane)} ──" for c in CATEGORIES
        ]
        # And every one of them starts its title in the same column: the marks are not all
        # the same width (🛣 and 🕸 are one cell where the rest are two), so the lane pads.
        starts = {cell_len(discipline_label(c, lane)) - cell_len(c.title) for c in CATEGORIES}
        assert len(starts) == 1
        assert all(len(rows) >= 2 for rows in blocks)  # each carries its description too
        # Highlighting deep in the one populated board scrolls its heading off the top of a
        # short viewport; the heading leads what pins, its description under it.
        for _ in range(4):
            browser.handle("down")
        visible, above, _below = frame._visible_slice(browser, browser.render_body(72), 10)
        board = CATEGORY_BY_ID["grand_tour"]
        assert _plain([visible[0]]).strip() == f"── {discipline_label(board, lane)} ──"
        assert _plain([visible[1]]).strip().startswith(board.description[:20])
        assert above is True
        browser.resolve(None)  # Esc
        await task
    finally:
        if not task.done():
            task.cancel()


async def test_trace_this_path_nests_above_the_browser_and_comes_back_to_it(
    tui_ctx, monkeypatch
) -> None:
    """Trace this path opens *over* the trophy case, and Esc from it lands back on the record.

    This used to flatten: the browser came down first and the whole flow returned when the
    trace closed, landing the reader on the main menu — a hand-built escape from a stack that
    had no other way out. Navigation is a strict stack now, so a sub-view nests like any
    other and ^W is what leaves the whole excursion at once.
    """
    ctx = tui_ctx
    session = ctx.ui.session
    ctx.repo.record_discovery(
        "grand_tour",
        1,
        "3d,f2",
        (HUB_ID, FAR_ID),
        score=2.0,
        stats={"hop_count": 2, "distinct_nodes": 2},
        app_version="0.1.0",
    )
    walked: list[str] = []

    async def fake_trace_path(ctx_, spec=""):  # noqa: ANN001
        walked.append(spec)
        # The browser is still on the stack underneath while the trace runs.
        assert any(isinstance(s, SelectScreen) and s.title == "Trophy case" for s in session._stack)
        return 0

    monkeypatch.setattr("meshterm.ui.trace_screen.open_trace_path", fake_trace_path)

    task = asyncio.ensure_future(open_records(ctx))
    try:
        browser = await _step_until(lambda: _trophy_case(session))
        assert browser is not None
        record = ctx.repo.discoveries("grand_tour")[0]
        browser.resolve(("open", CATEGORY_BY_ID["grand_tour"], 1, record))
        dialog = await _step_until(
            lambda: session.top if isinstance(session.top, RecordScreen) else None
        )
        assert session._base_screen() is dialog, "the record is a page, full-frame"
        dialog.resolve("trace")  # "Trace this path"
        # The trace ran and the browser is back on top — the same object, not a rebuild.
        again = await _step_until(lambda: _trophy_case(session))
        assert again is browser
        again.handle("escape")  # only Esc leaves the trophy case
        result = await task
    finally:
        if not task.done():
            task.cancel()

    assert walked == ["3d,f2"]  # the record's spec went straight to Trace path
    assert result == {"records": 1}


async def test_browser_cuts_every_row_the_way_it_cuts_the_highlighted_one(tui_ctx) -> None:
    """Unselected walks are cut, not middle-elided — the highlight only adds the shift.

    Both ends of a record's walk are the same ``★`` on every row (a record is a boomerang),
    so the ``⋯`` rescue that saves a route's two endpoints from a right truncation would buy
    back nothing here while spending cells the walk's *front* — the part that differs from row
    to row — was going to get. Every row therefore carries the whole line and is cut at the
    lane, exactly as the highlighted row is at shift zero.
    """
    ctx = tui_ctx
    long_route = tuple(f"{byte:02x}c24f54551e" for byte in range(0x20, 0x2C))
    for rank, route in enumerate((long_route, long_route[::-1]), start=1):
        ctx.repo.record_discovery(
            "grand_tour",
            1,
            f"{route[0][:2]},f2",
            route,
            score=float(20 - rank),
            stats={"hop_count": len(route), "distinct_nodes": len(route)},
            app_version="0.1.0",
        )

    task = asyncio.ensure_future(open_records(ctx))
    try:
        browser = await _step_until(lambda: _trophy_case(ctx.ui.session))
        assert browser is not None
        rows = [_plain([line]) for line in browser.render_body(72)]
        walks = [row for row in rows if "★" in row]
        assert len(walks) == 2, rows  # one highlighted, one not
        assert not any("⋯" in row for row in walks)  # nothing middle-elides any more
        # Highlighted and not, every walk starts at our star right after the score lane…
        assert all(re.search(r"#\d+ .*nodes  ★ → ", row) for row in walks), walks
        # …and runs on past the lane rather than closing on a rescued second endpoint.
        assert all(row.rstrip().endswith("…") for row in walks), walks
        browser.resolve(None)  # Esc
        await task
    finally:
        if not task.done():
            task.cancel()