"""R2 — the review flow: the Desk, the lightbox, the review.

Contract: docs/contracts/r2_flow.contract.md. Tests are grouped by the
contract's components (C1-C7) and named for the behaviour they pin.
"""

from __future__ import annotations

import pathlib
import re
import time
import sys

import pytest
from fastapi.testclient import TestClient

sys.path.insert(0, str(pathlib.Path(__file__).parent.parent))

from booth.app import create_app  # noqa: E402
from booth.items import booth_items  # noqa: E402
from booth.marks import set_flag  # noqa: E402

PNG = b"\x89PNG\r\n\x1a\n"


def _booth(root: pathlib.Path, name: str, files: dict[str, bytes]) -> pathlib.Path:
    b = root / name
    b.mkdir()
    for rel, data in files.items():
        p = b / rel
        p.parent.mkdir(parents=True, exist_ok=True)
        p.write_bytes(data)
    return b


def _client(root: pathlib.Path) -> TestClient:
    return TestClient(create_app(root, ttl_hours=24, start_sweeper=False))


def _ordinals(body: str) -> dict[str, str]:
    """rel -> the ordinal text its tile prints, in render order."""
    out = {}
    for fig in re.findall(r'<figure class="item[^"]*"[^>]*>.*?</figure>', body, re.S):
        rel = re.search(r'data-item="([^"]+)"', fig).group(1)
        m = re.search(r'class="ord"[^>]*>#(\d+)<', fig)
        out[rel] = m.group(1) if m else None
    return out


# ---- C1: Item.ordinal ------------------------------------------------------

def test_a_filtered_tile_keeps_its_number_in_the_whole_set(tmp_path):
    """The tracer. b.png is the second item of three; under ?filter=flagged it
    is the ONLY tile rendered and must still print #2, because the number is a
    property of the item, not of the view."""
    b = _booth(tmp_path, "g", {"a.png": PNG, "b.png": PNG, "c.png": PNG})
    set_flag(b, "b.png", True)
    body = _client(tmp_path).get("/b/g/?filter=flagged").text
    assert _ordinals(body) == {"b.png": "2"}


def test_ordinals_count_rendered_items_only(tmp_path):
    """A caption sidecar is not an item and takes no number, so the numbers
    stay contiguous over what the operator can see. And an undecodable name
    that the quote() guard skips takes none either — it is not rendered."""
    b = _booth(tmp_path, "g", {"a.png": PNG, "a.png.txt": b"cap", "b.png": PNG,
                                "c.png": PNG})
    import os
    os.close(os.open(bytes(b) + b"/m\xff.png", os.O_CREAT | os.O_WRONLY, 0o644))
    items = booth_items(b)
    assert [(it.rel, it.ordinal) for it in items] == [("a.png", 1), ("b.png", 2), ("c.png", 3)]


def test_ordinals_pad_to_the_width_of_the_whole_set(tmp_path):
    """Twelve items: numbers are written two wide, so a column of them lines
    up — and a filter showing only the first does not narrow it to #1."""
    b = _booth(tmp_path, "g", {f"{n:02d}.png": PNG for n in range(1, 13)})
    set_flag(b, "01.png", True)
    c = _client(tmp_path)
    assert _ordinals(c.get("/b/g/").text)["01.png"] == "01"
    assert _ordinals(c.get("/b/g/").text)["12.png"] == "12"
    assert _ordinals(c.get("/b/g/?filter=flagged").text) == {"01.png": "01"}


# ---- C2: review_chain and .seen -------------------------------------------

def test_the_review_ring_is_the_item_order_filtered_to_media(tmp_path):
    """Images, video and audio, in set order. A doc is not in the ring: it
    keeps its reading page."""
    from booth.items import review_chain
    b = _booth(tmp_path, "g", {"a.png": PNG, "b.mp3": b"ID3", "c.md": b"# c",
                                "d.webm": b"\x1aE", "e.zip": b"PK"})
    assert review_chain(booth_items(b)) == ["a.png", "b.mp3", "d.webm"]


def test_the_review_route_rings_through_audio_in_set_order(tmp_path):
    """From the only image, "next" is the audio track that follows it in the
    set — today's image-only ring had nowhere to go."""
    _booth(tmp_path, "g", {"a.png": PNG, "b.mp3": b"ID3", "c.md": b"# c"})
    body = _client(tmp_path).get("/b/g/view?f=a.png").text
    assert 'class="vnav vnext" href="?f=b.mp3"' in body
    assert 'class="vnav vprev" href="?f=b.mp3"' in body   # a two-item ring wraps


def test_a_full_size_look_is_recorded_as_seen_and_a_non_item_is_not(tmp_path):
    """`.seen` answers WHICH items were looked at full size. Gated on the item
    record like `record_view`: pointing `f` at a dotfile the service itself
    wrote is not a look at anything."""
    from booth.items import read_seen
    b = _booth(tmp_path, "g", {"a.png": PNG, "b.png": PNG, "c.png": PNG})
    (b / ".marks.lock").write_bytes(b"")
    c = _client(tmp_path)
    for f in ("a.png", "c.png", "a.png", ".marks.lock"):
        c.get(f"/b/g/view?f={f}")
    assert read_seen(b) == {"a.png", "c.png"}
    assert (b / ".seen").read_text() == "a.png\nc.png\n"      # sorted, deduplicated


def test_seen_is_pruned_to_live_items_at_the_next_write(tmp_path):
    """A deleted file drops out of `.seen` the next time anything is seen, so
    the marker never outgrows the booth and never counts a ghost."""
    from booth.items import read_seen
    b = _booth(tmp_path, "g", {"a.png": PNG, "b.png": PNG})
    c = _client(tmp_path)
    c.get("/b/g/view?f=a.png")
    (b / "a.png").unlink()
    c.get("/b/g/view?f=b.png")
    assert read_seen(b) == {"b.png"}


def test_a_planted_seen_symlink_is_replaced_not_written_through(tmp_path):
    """Any fleet session can write into a booth. A `.seen` symlink aimed at a
    file outside must not turn a page view into a write at that path."""
    outside = tmp_path / "victim.txt"
    outside.write_text("untouched")
    b = _booth(tmp_path, "g", {"a.png": PNG})
    (b / ".seen").symlink_to(outside)
    r = _client(tmp_path).get("/b/g/view?f=a.png")
    assert r.status_code == 200
    assert outside.read_text() == "untouched"
    assert not (b / ".seen").is_symlink()


def test_a_look_that_cannot_be_recorded_still_serves_the_page(tmp_path):
    """NEVER RAISES: a booth the service cannot write to costs the marker, not
    the page."""
    b = _booth(tmp_path, "g", {"a.png": PNG})
    b.chmod(0o555)
    try:
        r = _client(tmp_path).get("/b/g/view?f=a.png")
    finally:
        b.chmod(0o755)
    assert r.status_code == 200
    assert not (b / ".seen").exists()


# ---- C3: in-place judgment --------------------------------------------------

GOLDEN = pathlib.Path(__file__).parent / "golden" / "r2_mark_303.json"


def _seed(root: pathlib.Path) -> TestClient:
    """The golden's fixture, byte for byte (see golden_gen in the R2 notes)."""
    from booth.marks import declare_pick, write_note
    root.mkdir(parents=True, exist_ok=True)
    b = _booth(root, "g", {"a.png": PNG, "b b.png": PNG, "c.md": PNG})
    declare_pick(b, "q", {"prompt": "Which?", "options": ["x", "y"]}, target="a.png")
    set_flag(b, "a.png", True)
    write_note(b, "a.png", "seed")
    return TestClient(create_app(root, ttl_hours=24, start_sweeper=False),
                      follow_redirects=False)


def test_every_pre_r2_request_shape_gets_a_byte_identical_303(tmp_path):
    """INV-4. The golden was recorded from the PRE-R2 code: every mark route,
    with `back` absent and `back=marks`, under nine Accept headers that must
    NOT count as asking for JSON. Status, every header, and the body must match
    exactly — the no-JS guarantee lives in these bytes."""
    import json
    cases = json.loads(GOLDEN.read_text())
    assert len(cases) == 108
    for i, case in enumerate(cases):
        c = _seed(tmp_path / str(i))
        headers = {} if case["accept"] is None else {"accept": case["accept"]}
        r = c.post(case["path"], data=case["form"], headers=headers)
        got = {"status": r.status_code,
               "headers": sorted([k.lower(), v] for k, v in r.headers.items()),
               "body": r.content.decode("latin-1")}
        want = {k: case[k] for k in ("status", "headers", "body")}
        assert got == want, (case["path"], case["form"], case["accept"])


@pytest.mark.parametrize("path,form", [
    ("/b/g/answer", {"ask": "q", "choice": "y"}),
    ("/b/g/note", {"target": "a.png", "text": "in place"}),
    ("/b/g/flag", {"target": "b b.png", "on": "1"}),
    ("/b/g/unmark", {"mark": "note-1"}),
])
@pytest.mark.parametrize("accept", ["application/json", "text/html, application/json;q=0.5"])
def test_an_explicit_json_accept_gets_204_and_the_write_still_lands(tmp_path, path, form, accept):
    """The in-place path: same write as the form, no redirect, no body."""
    from booth.marks import marks_for
    c = _seed(tmp_path)
    before = [(m.id, m.shape, m.answer, m.text) for m in marks_for(tmp_path / "g")]
    r = c.post(path, data=form, headers={"accept": accept})
    assert r.status_code == 204 and r.content == b""
    assert "location" not in r.headers
    after = [(m.id, m.shape, m.answer, m.text) for m in marks_for(tmp_path / "g")]
    assert after != before, "the write must happen exactly as for the form"


@pytest.mark.parametrize("f,landing", [
    ("a.png", "/b/g/view?f=a.png#rail"),
    ("b b.png", "/b/g/view?f=b%20b.png#rail"),
    ("c.md", "/b/g/#item-b%20b.png"),          # a doc is not in the review ring
    ("gone.png", "/b/g/#item-b%20b.png"),      # not an item
    ("", "/b/g/#item-b%20b.png"),
    ("../../etc/passwd", "/b/g/#item-b%20b.png"),
])
def test_back_view_lands_on_the_review_only_for_a_media_item(tmp_path, f, landing):
    """The JS-off fix for the bounce: a flag set at full size lands back at
    full size. Anything that is not a media item in this booth falls back to
    the booth page exactly as a form with no `back` does."""
    c = _seed(tmp_path)
    r = c.post("/b/g/flag", data={"target": "b b.png", "on": "1", "back": "view", "f": f})
    assert r.status_code == 303
    assert r.headers["location"] == landing


# ---- C4: the Desk -------------------------------------------------------------

def _at(path: pathlib.Path, t: float) -> None:
    import os
    os.utime(path, (t, t))


def _desk(body: str) -> dict[str, list[str]]:
    """section -> the booths it renders, in render order."""
    out = {}
    for sec, inner in re.findall(r'<section class="desk-sec"[^>]*data-section="(\w+)"[^>]*>(.*?)</section>',
                                 body, re.S):
        out[sec] = re.findall(r'<article class="desk-row[^"]*" data-booth="([^"]+)"', inner)
    return out


def test_the_desk_triages_needs_you_then_new_then_everything_else(tmp_path):
    """The tracer for C4: three sections, always in this order, each booth in
    exactly one of them."""
    from booth.marks import declare_pick
    t0 = time.time() - 10_000    # in the PAST: a future stamp outranks every real write and hides the bug
    asks = _booth(tmp_path, "asks", {"a.png": PNG})
    declare_pick(asks, "q", {"prompt": "Which?", "options": ["x", "y"]})
    _booth(tmp_path, "fresh", {"a.png": PNG})                 # never looked at
    seen = _booth(tmp_path, "seen", {"a.png": PNG})
    _at(seen / "a.png", t0)
    (seen / ".viewed").write_bytes(b"")
    _at(seen / ".viewed", t0 + 60)                            # looked AFTER it landed
    body = _client(tmp_path).get("/").text
    assert _desk(body) == {"needs": ["asks"], "new": ["fresh"], "rest": ["seen"]}
    assert body.index('data-section="needs"') < body.index('data-section="new"') \
        < body.index('data-section="rest"')


def _set_created(booth: pathlib.Path, mark_id: str, created: str) -> None:
    import json
    doc = json.loads((booth / ".marks.json").read_text())
    for m in doc["marks"]:
        if m["id"] == mark_id:
            m["created"] = created
    (booth / ".marks.json").write_text(json.dumps(doc))


def test_needs_you_orders_by_the_parsed_stamp_not_the_string(tmp_path):
    """`created` is a string. As text, 11:00-07:00 sorts before 12:30-05:00;
    as time it is 18:00Z against 17:30Z, so the second question is OLDER and
    leads. An unparseable stamp, and a booth whose marks cannot be read, sort
    after every parseable one; name breaks the tie."""
    from booth.marks import declare_pick
    for n in ("alpha", "bravo", "charlie", "delta"):
        b = _booth(tmp_path, n, {"a.png": PNG})
        if n != "delta":
            declare_pick(b, "q", {"prompt": "?", "options": ["x", "y"]})
    _set_created(tmp_path / "alpha", "q", "2026-09-22T11:00:00-07:00")
    _set_created(tmp_path / "bravo", "q", "2026-09-22T12:30:00-05:00")
    _set_created(tmp_path / "charlie", "q", "last tuesday")
    (tmp_path / "delta" / ".marks.json").write_text("{not json")
    body = _client(tmp_path).get("/").text
    assert _desk(body)["needs"] == ["bravo", "alpha", "charlie", "delta"]
    assert "marks unreadable" in body


def test_flags_and_notes_alone_do_not_make_a_booth_need_you(tmp_path):
    """Needs-you means a question TO the operator. Flags and notes are the
    operator's own judgment."""
    from booth.marks import write_note
    b = _booth(tmp_path, "judged", {"a.png": PNG})
    set_flag(b, "a.png", True)
    write_note(b, None, "done here")
    assert "needs" not in _desk(_client(tmp_path).get("/").text)


def test_new_since_you_looked_reads_content_not_activity(tmp_path):
    """INV-5, the two clocks. A flag made after the last look is ACTIVITY and
    must not make a booth look new; a file landed after the last look is
    CONTENT and must. Newest content first."""
    t0 = time.time() - 10_000    # in the PAST: a future stamp outranks every real write and hides the bug
    judged = _booth(tmp_path, "judged", {"a.png": PNG})
    delivered = _booth(tmp_path, "delivered", {"a.png": PNG})
    later = _booth(tmp_path, "later", {"a.png": PNG})
    for b in (judged, delivered, later):
        _at(b / "a.png", t0)
        (b / ".viewed").write_bytes(b"")
        _at(b / ".viewed", t0 + 10)
    set_flag(judged, "a.png", True)                  # activity after the look
    (delivered / "b.png").write_bytes(PNG)
    _at(delivered / "b.png", t0 + 20)                # content after the look
    (later / "b.png").write_bytes(PNG)
    _at(later / "b.png", t0 + 30)                    # ...and later still
    desk = _desk(_client(tmp_path).get("/").text)
    assert desk["new"] == ["later", "delivered"]
    assert desk["rest"] == ["judged"]


def test_an_empty_section_renders_nothing_and_a_full_one_renders(tmp_path):
    """The negative half of the kept-lane pair, carried forward: a section with
    no booths has no heading and no box. Checked against the element, never a
    bare word the stylesheet also contains."""
    c = _client(tmp_path)
    body = c.get("/").text
    for sec in ("needs", "new", "rest"):
        assert f'data-section="{sec}"' not in body
    assert 'data-panel="benches"' not in body and 'data-panel="bookmarks"' not in body
    _booth(tmp_path, "fresh", {"a.png": PNG})
    body = c.get("/").text
    assert 'data-section="new"' in body
    assert 'data-section="needs"' not in body and 'data-section="rest"' not in body


def test_a_look_then_a_judgment_leaves_the_booth_out_of_new(tmp_path):
    """Through the routes, not hand-set markers. Every Booth write that CREATES
    a dotfile — `.viewed`, the marks file's temp-and-replace — bumps the booth
    DIRECTORY's mtime. A `landed_at` that read the directory would make the
    flag you set after looking read as a fresh delivery."""
    t0 = time.time() - 10_000    # in the PAST: a future stamp outranks every real write and hides the bug
    b = _booth(tmp_path, "g", {"a.png": PNG})
    _at(b / "a.png", t0)
    _at(b, t0)
    c = _client(tmp_path)
    assert _desk(c.get("/").text) == {"new": ["g"]}
    c.get("/b/g/")
    time.sleep(0.02)
    # Not following the 303: following it GETs the booth page, which records a
    # fresh look and would hide the defect this pins. A session writing a mark
    # from the CLI never looks at the page at all.
    c.post("/b/g/flag", data={"target": "a.png", "on": "1"}, follow_redirects=False)
    assert _desk(c.get("/").text) == {"rest": ["g"]}


def _link(desc: str, url: str, who: str = "x-dev") -> str:
    return f"- [{desc}]({url}) <sub>· {who} · 2026-09-01 10:00</sub>\n"


def test_the_side_column_shows_live_benches_and_non_booth_bookmarks(tmp_path):
    """Benches: non-retired, registry order. Bookmarks: the board the CLI
    writes, booth URLs left out (a booth announces itself on the Desk), pinned
    first then newest, capped at eight with the way to the rest."""
    from booth.benches import set_bench_state, upsert_bench
    upsert_bench(tmp_path, "http://h:1/", "live one", "a-dev")
    retired, _ = upsert_bench(tmp_path, "http://h:2/", "old one", "a-dev")
    set_bench_state(tmp_path, retired.id, "retired")
    rows = "".join(_link(f"ref {n}", f"http://ref/{n}") for n in range(10))
    rows += _link("a booth", "http://10.0.0.1:8090/b/somebooth/")
    board = _booth(tmp_path, "links", {"links.md": rows.encode()})
    (board / ".forever").write_bytes(b"")
    body = _client(tmp_path).get("/").text
    benches = re.search(r'data-panel="benches".*?</section>', body, re.S).group(0)
    assert "live one" in benches and "old one" not in benches
    marks = re.search(r'data-panel="bookmarks".*?</section>', body, re.S).group(0)
    shown = re.findall(r'class="desk-mark[^"]*" href="([^"]+)"', marks)
    assert shown == [f"http://ref/{n}" for n in (9, 8, 7, 6, 5, 4, 3, 2)]   # newest first, 8
    assert "all 10 on the board" in marks


def test_a_damaged_bench_registry_says_so_rather_than_rendering_empty(tmp_path):
    (tmp_path / ".benches.json").write_text("{broken")
    body = _client(tmp_path).get("/").text
    panel = re.search(r'data-panel="benches".*?</section>', body, re.S)
    assert panel and "could not be read" in panel.group(0)


def test_a_row_previews_four_images_keeps_blur_and_counts_flags(tmp_path):
    """The originals shown small (no generated thumbnail), the first four in
    item order, a blurred one still blurred. The flag count is on the row."""
    from booth.app import set_blurred
    b = _booth(tmp_path, "g", {f"{n}.png": PNG for n in "abcde"})
    set_blurred(b, "b.png", True)
    set_flag(b, "c.png", True)
    set_flag(b, "e.png", True)
    body = _client(tmp_path).get("/").text
    row = re.search(r'<article class="desk-row[^"]*" data-booth="g".*?</article>', body, re.S).group(0)
    imgs = re.findall(r'<img class="([^"]*)" loading="lazy" src="/b/g/([^"]+)"', row)
    assert imgs == [("", "a.png"), ("blurred-thumb", "b.png"), ("", "c.png"), ("", "d.png")]
    assert "2 flagged" in row


def test_a_booth_without_images_shows_its_kind_instead(tmp_path):
    _booth(tmp_path, "songs", {"a.mp3": b"ID3", "b.mp3": b"ID3"})
    row = re.search(r'data-booth="songs".*?</article>', _client(tmp_path).get("/").text, re.S).group(0)
    assert "♪ audio" in row and "<img" not in row


# ---- C5: the lightbox ---------------------------------------------------------

def _region(body: str, rid: str) -> str:
    m = re.search(r'<(\w+)[^>]*data-region="%s"[^>]*>' % re.escape(rid), body)
    assert m, f"no region {rid}"
    tag = m.group(1)
    # regions in these templates do not nest a same-named tag inside themselves
    end = body.index(f"</{tag}>", m.end())
    return body[m.start():end]


def test_the_verdict_sits_beside_the_set_on_a_gallery_booth(tmp_path):
    """The tracer for C5: the open question, the flags and the notes live in
    one aside next to the grid — not in a panel above it that scrolls away."""
    from booth.marks import declare_pick
    b = _booth(tmp_path, "g", {"a.png": PNG, "b.png": PNG})
    declare_pick(b, "q", {"prompt": "Which one?", "options": ["a", "b"]})
    body = _client(tmp_path).get("/b/g/").text
    aside = _region(body, "verdict")
    assert aside.startswith('<aside class="verdict"')
    assert 'action="/b/g/answer"' in aside and "Which one?" in aside
    assert body.count('action="/b/g/answer"') == 1, "the pick renders once, in the aside"
    assert 'class="lightbox"' in body and 'id="grid"' in body


def test_the_flag_tray_lists_flags_by_tile_number_not_by_click_order(tmp_path):
    """Flag #3 first, then #1: the tray reads #1, #3. Today's panel list is in
    click order `(created, id)`; the tray is the SET's order, the declared
    change. Each entry is the original shown small, blurred if the item is."""
    from booth.app import set_blurred
    b = _booth(tmp_path, "g", {"a.png": PNG, "b.png": PNG, "c.png": PNG})
    set_flag(b, "c.png", True)
    time.sleep(0.01)
    set_flag(b, "a.png", True)
    set_blurred(b, "a.png", True)
    aside = _region(_client(tmp_path).get("/b/g/").text, "verdict")
    tray = re.findall(r'<a class="tray-item( is-blurred)?" href="view\?f=([^"]+)"[^>]*>.*?#(\d+)<', aside, re.S)
    assert tray == [(" is-blurred", "a.png", "1"), ("", "c.png", "3")]


def test_groups_get_an_inline_header_that_is_not_a_tile(tmp_path):
    """When the rail finds grouping informative, each group's first tile is
    preceded by a header — a div, never a figure.item, so the tile sequence
    the keyboard and the order check walk is exactly the items."""
    files = {f"{g}-{n}.png": PNG for g in ("aa", "bb", "cc") for n in (1, 2)}
    _booth(tmp_path, "g", files)
    body = _client(tmp_path).get("/b/g/").text
    grid = body[body.index('id="grid"'):]
    heads = re.findall(r'<div class="grp-head"[^>]*><span class="grp-key">(\w+)</span> <span class="grp-n">(\d+)</span>', grid)
    assert heads == [("aa", "2"), ("bb", "2"), ("cc", "2")]
    assert len(re.findall(r'<figure class="item', grid)) == 6
    # and no header at all when grouping is not informative
    _booth(tmp_path, "flat", {f"DSC{n}.jpg": PNG for n in range(4)})
    assert 'class="grp-head"' not in _client(tmp_path).get("/b/flat/").text


def test_every_mark_dependent_element_is_a_swappable_region(tmp_path):
    """The in-place script replaces regions by id; a stale flag count or tile
    after an in-place flag is the failure this pins."""
    b = _booth(tmp_path, "g", {"a b.png": PNG, "c.png": PNG})
    body = _client(tmp_path).get("/b/g/").text
    for rid in ("verdict", "filters", "item-a%20b.png", "item-c.png", "status"):
        assert f'data-region="{rid}"' in body, rid
    # the standing board has no lightbox and therefore no verdict aside
    _booth(tmp_path, "links", {"links.md": b"- [x](http://x/) <sub>\xc2\xb7 a \xc2\xb7 2026-09-01 10:00</sub>\n"})
    board = _client(tmp_path).get("/b/links/").text
    assert 'data-region="verdict"' not in board and 'class="lightbox"' not in board


# ---- C6: the review -----------------------------------------------------------

def test_an_audio_item_is_reviewed_like_a_picture(tmp_path):
    """The tracer for C6. A track gets the review page — its native player on
    the stage, no Fit/1:1 toggle (that is for images only), and the judgment
    rail with a flag that lands back here."""
    _booth(tmp_path, "g", {"a.png": PNG, "b.mp3": b"ID3", "c.mp3": b"ID3"})
    r = _client(tmp_path).get("/b/g/view?f=b.mp3", follow_redirects=False)
    assert r.status_code == 200
    body = r.text
    stage = body[body.index('id="vstage"'):]
    assert len(re.findall(r"<audio\b[^>]*\bcontrols\b", stage.split("</div>")[0])) == 1
    assert 'id="vtoggle"' not in body and ">1:1<" not in body
    rail = _region(body, "rail")
    assert 'name="back" value="view"' in rail and 'name="f" value="b.mp3"' in rail
    assert "2 of 3" in rail and "#2" in rail


def test_filmstrip_and_tape_are_the_review_ring_with_seen_and_flags(tmp_path):
    """One list, three surfaces: the filmstrip and the tape are the ring in
    set order. The tape counts seen ∩ ring — including the item being looked
    at, which is recorded before the page renders; a doc is never in it."""
    b = _booth(tmp_path, "g", {"a.png": PNG, "b.md": b"# b", "c.png": PNG, "d.mp3": b"ID3"})
    set_flag(b, "d.mp3", True)
    c = _client(tmp_path)
    c.get("/b/g/view?f=a.png")
    body = c.get("/b/g/view?f=c.png").text
    film = re.findall(r'<a class="film-f([^"]*)"\s+href="\?f=([^"]+)"', _region(body, "film"))
    assert [(rel, cls.split()) for cls, rel in film] == [
        ("a.png", []), ("c.png", ["is-current"]), ("d.mp3", ["is-flagged"])]
    assert re.findall(r'class="film-ord">#(\d)<', body) == ["1", "3", "4"]   # whole-set numbers
    tape = _region(body, "tape")
    assert re.findall(r'<a class="tape-s([^"]*)"', tape) == [" is-seen", " is-current", " is-flagged"]
    assert "2 of 3 seen" in tape


def test_a_question_about_this_item_is_answerable_here_and_the_rest_wait_for_the_end(tmp_path):
    """The rail offers a pick TARGETING the item; booth-level picks are a count
    and a link — until the last item, where the end of the set offers them
    all, each landing back on the review."""
    from booth.marks import declare_pick
    b = _booth(tmp_path, "g", {"a.png": PNG, "b.png": PNG})
    declare_pick(b, "about-a", {"prompt": "Is a sharp?", "options": ["yes", "no"]}, target="a.png")
    declare_pick(b, "overall", {"prompt": "Ship the set?", "options": ["yes", "no"]})
    c = _client(tmp_path)
    first = _region(c.get("/b/g/view?f=a.png").text, "rail")
    assert "Is a sharp?" in first and "Ship the set?" not in first
    assert "1 more open question on this booth" in first
    assert first.count('name="back" value="view"') >= 2          # flag + the pick
    last = _region(c.get("/b/g/view?f=b.png").text, "rail")
    assert "End of the set" in last
    assert "Ship the set?" in last and "Is a sharp?" in last
    form = re.search(r'<form class="mark-form"[^>]*>.*?Ship the set\?|Ship the set\?.*?</form>', last, re.S)
    assert form and 'name="f" value="b.png"' in last


def test_only_a_picture_gets_the_fit_toggle_and_blur_stays_honest(tmp_path):
    from booth.app import set_blurred
    b = _booth(tmp_path, "g", {"a.png": PNG, "v.webm": b"\x1aE"})
    set_blurred(b, "a.png", True)
    c = _client(tmp_path)
    pic = c.get("/b/g/view?f=a.png").text
    assert 'id="vtoggle"' in pic and ">Fit<" in pic and ">1:1<" in pic
    assert 'class="vstage fit is-blurred"' in pic and "blur is cosmetic" in pic
    vid = c.get("/b/g/view?f=v.webm").text
    assert 'id="vtoggle"' not in vid and re.search(r"<video\b[^>]*\bcontrols\b", vid)


# ---- C7: copy and brand -------------------------------------------------------

def test_no_emblem_in_the_chrome(tmp_path):
    """Ruling `emblem=no`: the top bar carries the brand dot and the name, and
    no image at all."""
    _booth(tmp_path, "g", {"a.png": PNG})
    c = _client(tmp_path)
    for path in ("/", "/b/g/", "/b/g/view?f=a.png"):
        body = c.get(path).text
        m = re.search(r'<header class="topbar">.*?</header>', body, re.S)
        if m:
            assert "<img" not in m.group(0) and "<svg" not in m.group(0), path