"""Unit: the RAG-page sync button's phase-64 (task 04) live-file contract.

The browser behavior is E2E-covered (tests/e2e/test_sync_upload_progress.py,
task 06); here we pin the source-level wiring in sources.js, styles.css,
and the shell's RAG view markup (index.html — sources.html / git-
sources.html folded in, phase 76 task 02) — the fmtSyncLabel contract
(both kinds, file
present/absent, counts only when total > 0), enterSyncRunningState
writing the full untruncated path to the button title + #sync-result,
the two-job tick decision tree (sync running > upload running > sync
success > sync failed > upload success > upload failed > idle; the A3
settle never renders upload counts into #sync-result), and the
load-time re-attach of an in-flight upload run (phase 90: unpack +
register only — the bare "Importing…" label, no file) — so a silent
regression is caught without a browser.

Phase 64 task 05 adds the Sources-page (git-sources.js) upload
contract: the "Successfully uploaded — <file>" toast on the 202
(page-local, phase-55 pattern, success-only), the "Processing…"
label driven by the 2 s GET /api/git-sources/upload/status poll, the
409 re-attach (no error banner), the poll's terminal decision tree
(success → result line + announce + reload, NO second toast; failed
→ sanitized error banner + reload; idle → defensive restore), the
finally's never-restore-while-polling guard (PLAN §7.4), and the boot
re-attach branches.

Phase 90 re-points the upload contract to UNPACK + REGISTER ONLY:
the processing state is the BARE "Processing…" for the whole
background run (no current_file, no "(n/m)" counts, no title — the
scan's progress moved to the RAG page's Sync button), the button
reads exactly "Upload" (the phase-64 scan-suffixed label is gone), the
settled result line is
"Uploaded <name> — press Sync sources to import it." (fmtUploadResult
off the status's {"message": "uploaded"} detail; the nameless variant
after a reload / on the 409 re-attach), and the success announce
names the next step.

Phase 98 (task 02) pins the SYNC job's phase-aware label (D2):
fmtSyncPhaseLabel — "overview" → exactly "Writing KB overview…",
"summaries" → "Summarizing folders… <current_summary> (n/m)" (the
folder part omitted while current_summary is null → the bare
"Summarizing folders… (n/m)"), anything else → the byte-identical
phase-64 fmtSyncLabel("sync", …) fall-through — plus the status-object
threading (the tick's branch 1 + the initSyncButton running re-attach
pass the WHOLE status; the upload job and the 202/409 click stay on
the bare label — the upload status has no phase) and the A4 title-rule
adjustment (the full untruncated label rides the button title for
EVERY running label — the file-only rule is gone).
"""
from __future__ import annotations

import re
from pathlib import Path

FRONTEND = Path(__file__).resolve().parents[2] / "frontend"
SOURCES_JS = FRONTEND / "assets" / "sources.js"
STYLES_CSS = FRONTEND / "assets" / "styles.css"
# Phase 76 (task 02): both HTML pages are folded into the ONE-document
# shell — the pinned comments now live in the RAG / Sources view
# sections of index.html.
SHELL_HTML = FRONTEND / "index.html"
GIT_SOURCES_JS = FRONTEND / "assets" / "git-sources.js"


def _js() -> str:
    return SOURCES_JS.read_text(encoding="utf-8")


def _css() -> str:
    return STYLES_CSS.read_text(encoding="utf-8")


def _html() -> str:
    return SHELL_HTML.read_text(encoding="utf-8")


def _gjs() -> str:
    return GIT_SOURCES_JS.read_text(encoding="utf-8")


def _ghtml() -> str:
    return SHELL_HTML.read_text(encoding="utf-8")


def _gfn(js: str, name: str) -> str:
    """The source of the first `function <name>` in git-sources.js
    (brace balanced — since phase 76 task 02 the functions live inside
    mount(root), so the closing brace is indented, not line-leading).
    """
    fn = js.find(f"function {name}")
    assert fn != -1, f"{name} must be defined in git-sources.js"
    open_idx = js.find("{", fn)
    depth = 0
    for i in range(open_idx, len(js)):
        c = js[i]
        if c == "{":
            depth += 1
        elif c == "}":
            depth -= 1
            if depth == 0:
                return js[fn : i + 1]
    raise AssertionError(f"unbalanced braces in {name}")


def _utick(js: str) -> str:
    """The upload poll tick inside startUploadPolling — from `const
    tick = async () => {` to the next function (initUploadStatus), so
    the whole decision tree is in the slice."""
    fn = js.find("function startUploadPolling")
    assert fn != -1, "startUploadPolling must be defined in git-sources.js"
    tick = js.find("const tick = async () => {", fn)
    assert tick != -1, "the tick must live inside startUploadPolling"
    end = js.find("async function initUploadStatus", tick)
    assert end != -1, "initUploadStatus must follow startUploadPolling"
    return js[tick:end]


def _usubmit(js: str) -> str:
    """The upload form's submit handler — from the addEventListener to
    the next top-level function (focusNewRow), so every branch (202 /
    409 / other non-2xx / network / finally) is in the slice."""
    start = js.find('uploadFormEl.addEventListener("submit"')
    assert start != -1, "the upload form must wire a submit handler"
    end = js.find("function focusNewRow", start)
    assert end != -1, "focusNewRow must follow the upload handler"
    return js[start:end]


def _fn(js: str, name: str) -> str:
    """The source of the first `function <name>` in js (brace balanced —
    since phase 76 task 02 the functions live inside mount(root), so
    the closing brace is indented, not line-leading; the house pin
    pattern from tests/unit/test_sync_button.py)."""
    fn = js.find(f"function {name}")
    assert fn != -1, f"{name} must be defined in sources.js"
    open_idx = js.find("{", fn)
    depth = 0
    for i in range(open_idx, len(js)):
        c = js[i]
        if c == "{":
            depth += 1
        elif c == "}":
            depth -= 1
            if depth == 0:
                return js[fn : i + 1]
    raise AssertionError(f"unbalanced braces in {name}")


def _tick(js: str) -> str:
    """The poll tick inside startSyncPolling — from `const tick = async
    () => {` to the next function (startSync), so the whole two-job
    decision tree is in the slice."""
    fn = js.find("function startSyncPolling")
    assert fn != -1, "startSyncPolling must be defined in sources.js"
    tick = js.find("const tick = async () => {", fn)
    assert tick != -1, "the tick must live inside startSyncPolling"
    end = js.find("async function startSync", tick)
    assert end != -1, "startSync must follow startSyncPolling"
    return js[tick:end]


# ---------- fmtSyncLabel: the live-file label contract ----------


def test_fmt_sync_label_signature_and_prefixes() -> None:
    """fmtSyncLabel(kind, currentFile, done, total): `kind` picks the
    prefix — "upload" → "Importing" (the background run's word, A3),
    anything else → "Syncing…". The file is appended only when present
    (sync: the bare prefix shows during clone/pull, before any file is
    indexed — A4; phase 90: the upload run never carries a file or
    counts, so its label is always the bare "Importing…"); the counts
    are appended only when total > 0 (the import has started); file
    before counts."""
    body = _fn(_js(), "fmtSyncLabel")
    assert "function fmtSyncLabel(kind, currentFile, done, total)" in body
    assert 'kind === "upload"' in body
    assert '"Importing"' in body and '"Syncing…"' in body
    # the upload prefix must come from the kind check (ternary, in order)
    i_kind = body.find('kind === "upload"')
    i_importing = body.find('"Importing"')
    i_syncing = body.find('"Syncing…"')
    assert -1 < i_kind < i_importing < i_syncing
    # file appended only when present
    assert "currentFile ?" in body
    assert "`${prefix} ${currentFile}`" in body
    # counts only when the import has started (total > 0)
    assert "total > 0" in body
    assert "` (${done}/${total})`" in body
    i_file = body.find("currentFile ?")
    i_counts = body.find("total > 0")
    assert -1 < i_file < i_counts, "the file lands before the counts"


# ---------- enterSyncRunningState: full path to title + announcer ----------


def test_fmt_sync_phase_label_is_the_exact_d2_contract() -> None:
    """fmtSyncPhaseLabel(status) — the SYNC job's phase-aware label
    (phase 98 task 02, D2): "overview" → exactly "Writing KB
    overview…" (no folder, no counts); "summaries" →
    "Summarizing folders… <current_summary> (n/m)" — the folder part
    (one leading space + current_summary) is omitted while
    current_summary is null (the phase's first poll → the bare
    "Summarizing folders… (n/m)"); anything else (the null prelude,
    "import") → the phase-64 fmtSyncLabel fall-through, byte-identical
    (same builder, same fields, same order). The UPLOAD job never
    enters here — its status has no phase (D2)."""
    body = _fn(_js(), "fmtSyncPhaseLabel")
    assert "function fmtSyncPhaseLabel(status)" in body
    # "overview": the exact copy, no folder, no counts.
    i_ov = body.find('status.phase === "overview"')
    i_sum = body.find('status.phase === "summaries"')
    assert -1 < i_ov < i_sum
    ov = body[i_ov:i_sum]
    assert 'return "Writing KB overview…";' in ov
    assert "current_summary" not in ov and "summaries_done" not in ov, (
        "the overview label carries no folder and no counts"
    )
    # "summaries": the exact template — optional folder, counts always.
    i_fall = body.find("return fmtSyncLabel")
    assert i_sum < i_fall, "the summaries branch precedes the fall-through"
    sum_ = body[i_sum:i_fall]
    assert 'status.current_summary ? ` ${status.current_summary}` : ""' in sum_, (
        "the folder part — one leading space + the folder, or nothing"
    )
    assert (
        "return `Summarizing folders…${folder} "
        "(${status.summaries_done}/${status.summaries_total})`;"
    ) in sum_, "the exact D2 copy (with and without the folder)"
    # anything else (null prelude, "import"): byte-identical to today's
    # sync label — same builder, same fields, same order.
    assert (
        'return fmtSyncLabel("sync", status.current_file, '
        "status.files_done, status.files_total);"
    ) in body[i_fall:]


def test_enter_running_state_is_phase_aware_and_announces_full_label() -> None:
    """The running-state entry keeps the §7.4 never-stale mechanics
    (disabled, aria-busy, spinning icon, the stale .is-error removed)
    and — phase 98 (task 02, D2) — is phase-aware for the SYNC job:
    a sync-kind call carrying the status object takes the
    fmtSyncPhaseLabel form, while the upload job (no status — its
    endpoint has no phase) and the 202/409 click keep the bare
    fmtSyncLabel label, byte-identical. The FULL untruncated label —
    whatever its form — rides the button title (set for EVERY running
    label: the phase-64 "title only when there is a current file"
    rule is adjusted away) and #sync-result (the aria-live announcer);
    CSS ellipsizes only the label span."""
    body = _fn(_js(), "enterSyncRunningState")
    assert (
        "function enterSyncRunningState(kind, currentFile, done, total, status)"
        in body
    )
    assert "syncBtn.disabled = true" in body
    assert 'syncBtn.setAttribute("aria-busy", "true")' in body
    assert "syncIcon.classList.add(\"is-spinning\")" in body
    assert "syncBtn.classList.remove(\"is-error\")" in body
    # the phase-aware split: sync + status → the D2 builder; the
    # fall-through (upload / the click, no status) is the byte-
    # identical phase-64 builder.
    i_phase = body.find("fmtSyncPhaseLabel(status)")
    i_fall = body.find("fmtSyncLabel(kind, currentFile, done, total)")
    assert 'kind === "sync" && status' in body
    assert -1 < i_phase < i_fall, "the phase label precedes the fall-through"
    # A4: the untruncated label rides the title for EVERY running label
    # (the remove-when-no-file rule is gone) and #sync-result.
    assert "syncBtn.title = label" in body, "the full label on hover, always"
    assert 'syncBtn.removeAttribute("title")' not in body, (
        "the title is set for every running label (D2: not just file labels)"
    )
    i_title = body.find("syncBtn.title = label")
    i_span = body.find("syncLabel.textContent = label")
    i_result = body.find("syncResult.textContent = label")
    assert -1 < i_title < i_span < i_result, (
        "one label: built once, written to title, span AND the announcer"
    )


# ---------- the two-job tick (startSyncPolling) ----------


def test_tick_fetches_both_jobs_with_403_and_blip_rules() -> None:
    """Each tick fetches BOTH status endpoints (the sync and the
    background upload run — phase 90: unpack + register, no scan).
    The 403 backstop (button hidden) applies
    to the SYNC fetch only — a 403 on the upload fetch is simply "no
    upload" (never a hide); a network blip on either fetch retries next
    tick (the tick reschedules, it never dies on a failed fetch)."""
    tick = _tick(_js())
    assert 'fetch("/api/sync/status")' in tick
    assert 'fetch("/api/git-sources/upload/status")' in tick
    assert "r.status === 403" in tick, "the sync fetch keeps the whoami backstop"
    assert "ur.status === 403" not in tick, "upload 403 = no upload (A3)"
    assert "ur.ok" in tick, "the upload fetch is read only when ok"
    assert tick.count("catch {") >= 2, "both fetches are blip-tolerant"
    assert tick.count("setTimeout(tick, SYNC_POLL_MS)") >= 3, (
        "the blip and both running branches all reschedule"
    )
    # the sync-status blip must not settle the button: it reschedules.
    i_nostatus = tick.find("if (!syncStatus)")
    assert i_nostatus != -1
    branch = tick[i_nostatus : i_nostatus + 200]
    assert "setTimeout(tick, SYNC_POLL_MS)" in branch
    assert "applySyncIdle" not in branch, "a blip is not an idle"


def test_tick_decision_tree_order_and_branches() -> None:
    """The phase-64 decision tree, in order (A3/A4): 1. sync running →
    2. upload running → 3. sync success → 4. sync failed → 5. upload
    success → 6. upload failed → 7. both idle. The running branches
    enter the running state with THEIR job's kind + live file/counts;
    the sync terminals are the unchanged phase-32 appliers; the upload
    terminals settle "Sync sources" + clear #sync-result + hide a stale
    error + emit a synthetic idle frame — never the upload's status
    object, never fmtSyncResult (no upload counts in #sync-result, A3);
    only the upload SUCCESS refreshes the catalog (the KB changed); the
    upload failure raises no error surface on this page (the banner is
    the Sources page's)."""
    tick = _tick(_js())
    b_sync_run = tick.find('syncStatus.state === "running"')
    b_up_run = tick.find('uploadStatus && uploadStatus.state === "running"')
    b_sync_ok = tick.find('syncStatus.state === "success"')
    b_sync_fail = tick.find('syncStatus.state === "failed"')
    b_up_ok = tick.find('uploadStatus && uploadStatus.state === "success"')
    b_up_fail = tick.find('uploadStatus && uploadStatus.state === "failed"')
    b_idle = tick.find("applySyncIdle(syncStatus)")
    assert (
        -1 < b_sync_run < b_up_run < b_sync_ok < b_sync_fail < b_up_ok < b_up_fail < b_idle
    ), "the tree must fire in the documented order"
    # 1. sync running: the sync-kind live label, reschedule.
    branch1 = tick[b_sync_run:b_up_run]
    assert (
        '"sync", syncStatus.current_file, syncStatus.files_done, syncStatus.files_total'
        in branch1
    )
    assert "setTimeout(tick, SYNC_POLL_MS)" in branch1
    # 2. upload running: the upload-kind live label (A3), reschedule.
    branch2 = tick[b_up_run:b_sync_ok]
    assert (
        '"upload", uploadStatus.current_file, uploadStatus.files_done, uploadStatus.files_total'
        in branch2
    )
    assert "setTimeout(tick, SYNC_POLL_MS)" in branch2
    # 3 + 4. the sync terminals are the unchanged phase-32 appliers.
    assert "applySyncSuccess(syncStatus)" in tick[b_sync_ok:b_sync_fail]
    assert "applySyncFailure(syncStatus)" in tick[b_sync_fail:b_up_ok]
    # 5. upload success: settle + clear + hide stale error + emit idle
    #    + the catalog refresh (the new documents must appear).
    up_ok = tick[b_up_ok:b_up_fail]
    for line in (
        'settleSyncButton("Sync sources")',
        'syncResult.textContent = ""',
        "hideSyncError()",
        'emitSyncStatus({ state: "idle" })',
        "loadTree()",  # phase 97: the catalog load is the tree fetch
    ):
        assert line in up_ok, f"the upload-success settle must carry {line!r}"
    assert "fmtSyncResult" not in up_ok, "no upload counts in #sync-result (A3)"
    assert "applySyncSuccess" not in up_ok, "the sync applier is never an upload branch"
    # 6. upload failed: settle only — no catalog refresh (the KB did
    #    not change) and no error surface on this page (A3).
    up_fail = tick[b_up_fail:b_idle]
    for line in (
        'settleSyncButton("Sync sources")',
        'syncResult.textContent = ""',
        "hideSyncError()",
        'emitSyncStatus({ state: "idle" })',
    ):
        assert line in up_fail, f"the upload-failed settle must carry {line!r}"
    assert "loadTree()" not in up_fail, "no KB change on a failed upload"
    assert "showSyncError" not in up_fail, "no banner on this page (A3)"
    assert "applySyncFailure" not in up_fail and "showSyncModal" not in up_fail
    # 7. both idle: the unchanged idle settle.
    assert "stopSyncPolling()" in tick[b_idle - 60 : b_idle + 40]


# ---------- the click branch + the load-time re-attach ----------


def test_click_branch_enters_sync_running_without_a_file() -> None:
    """The 202/409 branch of startSync enters the running state with
    the sync kind and no file yet (the run is just starting — model
    check / clone-pull: bare "Syncing…", A4); the emitSyncStatus({
    state: "running" }) dedup via lastSyncState stays, and the poll
    starts."""
    js = _js()
    idx = js.find("r.status === 202 || r.status === 409")
    assert idx != -1
    branch = js[idx : idx + 500]
    assert "enterSyncRunningState(\"sync\", null, 0, 0)" in branch
    assert 'emitSyncStatus({ state: "running" })' in branch
    assert "lastSyncState !== \"running\"" in branch, "the dedup stays"
    assert "startSyncPolling()" in branch


def test_reattach_adopts_a_running_upload_only() -> None:
    """initSyncButton: the sync terminals render the last result; the
    RUNNING sync re-enters with the live file AND the whole status
    (phase 98 task 02: the label is phase-aware — a mid-summaries
    reload re-enters with the summaries label). With the sync IDLE it
    fetches the upload status: a RUNNING upload run re-attaches
    (running state, upload kind — phase 90: no live file, the label
    stays bare "Importing…" — the synthetic running frame, the poll
    starts); a terminal upload is a no-op — the fall-through is the
    plain idle settle (the boot-time loadTree() already shows the
    current catalog)."""
    body = _fn(_js(), "initSyncButton")
    assert "await fetchIsAdmin()" in body, "admin-only (no extra fetch)"
    assert 'fetch("/api/git-sources/upload/status")' in body
    # the sync running re-attach now carries the live file too
    assert '"sync", status.current_file, status.files_done, status.files_total' in body
    # the ONLY upload branch is the running one (A3)
    assert "upload && upload.state === \"running\"" in body
    assert 'upload.state === "success"' not in body, "a terminal upload never re-attaches"
    assert 'upload.state === "failed"' not in body, "a terminal upload never re-attaches"
    i_check = body.find("upload && upload.state === \"running\"")
    i_fall = body.find("applySyncIdle(status)", i_check)
    assert -1 < i_check < i_fall
    branch = body[i_check:i_fall]
    assert '"upload", upload.current_file, upload.files_done, upload.files_total' in branch
    assert 'emitSyncStatus({ state: "running" })' in branch
    assert "startSyncPolling()" in branch
    # the idle settle is the fall-through (the last statement — the
    # brace-balanced body ends with the closing brace)
    assert body.rstrip().removesuffix("}").rstrip().endswith("applySyncIdle(status);")


def test_tick_sync_running_passes_the_status_for_the_phase_label() -> None:
    """Branch 1 of the two-job tick (phase 98 task 02): the sync
    running state passes the WHOLE syncStatus object as the fifth
    argument — the phase-aware label (overview / summaries) reads its
    phase fields. The upload running branch stays on the BARE four-arg
    label (its status has no phase — D2): no fifth argument, no status
    object anywhere in the branch."""
    tick = _tick(_js())
    b_sync_run = tick.find('syncStatus.state === "running"')
    b_up_run = tick.find('uploadStatus && uploadStatus.state === "running"')
    b_sync_ok = tick.find('syncStatus.state === "success"')
    assert -1 < b_sync_run < b_up_run < b_sync_ok
    branch1 = tick[b_sync_run:b_up_run]
    i_call = branch1.find("enterSyncRunningState(")
    call = branch1[i_call:branch1.find(");", i_call)]
    assert re.search(
        r'"sync",\s*syncStatus\.current_file,\s*syncStatus\.files_done,\s*'
        r"syncStatus\.files_total,\s*syncStatus\s*$",
        call,
    ), "branch 1 passes the whole status (fifth arg) for the phase-aware label"
    branch2 = tick[b_up_run:b_sync_ok]
    i_call2 = branch2.find("enterSyncRunningState(")
    call2 = branch2[i_call2:branch2.find(");", i_call2)]
    assert re.fullmatch(
        r'enterSyncRunningState\(\s*"upload",\s*uploadStatus\.current_file,\s*'
        r"uploadStatus\.files_done,\s*uploadStatus\.files_total\s*$",
        call2,
    ), "the upload job keeps the bare four-arg label — no status, no phase (D2)"
    assert "phase" not in call2 and "summaries" not in call2


def test_reattach_sync_running_passes_the_status_for_the_phase_label() -> None:
    """initSyncButton (phase 98 task 02): the RUNNING sync re-attach
    passes the WHOLE status object — a reload mid-summaries re-enters
    the running state with the summaries label (the never-stale
    contract); the RUNNING upload re-attach stays on the bare four-arg
    label (its status has no phase — D2)."""
    body = _fn(_js(), "initSyncButton")
    i_sync = body.find('"sync", status.current_file')
    assert i_sync != -1
    call = body[i_sync:body.find(");", i_sync)]
    assert re.search(
        r'"sync",\s*status\.current_file,\s*status\.files_done,\s*'
        r"status\.files_total,\s*status\s*$",
        call,
    ), "the RUNNING sync re-attach passes the status object (fifth arg)"
    i_up = body.find('"upload", upload.current_file')
    assert i_up != -1
    call2 = body[i_up:body.find(");", i_up)]
    assert re.fullmatch(
        r'"upload",\s*upload\.current_file,\s*upload\.files_done,\s*upload\.files_total\s*$',
        call2,
    ), "the RUNNING upload re-attach keeps the bare four-arg label (D2)"


# ---------- the section header + the page comment ----------


def test_section_header_documents_the_two_job_contract() -> None:
    """The sync-button section marker comment documents the phase-64
    contract: the live file label, the two-job decision tree (both
    status endpoints), and the A3 settle behavior (catalog refresh; the
    upload counts never render here)."""
    js = _js()
    marker = js.find("Sync sources button (Sources page only)")
    assert marker != -1, "the sync section marker comment must stay"
    header = js[marker : js.find("const syncBtn")]
    assert "Phase 64 (task 04)" in header
    assert "/api/git-sources/upload/status" in header, "the second job's endpoint"
    assert "loadTree" in header, "the A3 catalog refresh (phase 97 rename)"
    assert "A3" in header and "A4" in header


def test_sources_html_comment_documents_the_live_announcer() -> None:
    """The #sync-result comment in the shell's RAG view (formerly
    sources.html) documents the announcer's role: the SYNC's live file
    label ("Syncing… <file> (n/m)"), untruncated for the aria-live
    announcer, and — phase 90 — the BARE "Importing…" label an
    in-flight upload run adopts (unpack + register only, no scan: its
    status never carries a file or counts); empty after an upload
    settles (A3 — the upload's result line lives on the Sources
    page)."""
    html = _html()
    idx = html.find('id="sync-result"')
    assert idx != -1
    comment = html[max(0, idx - 900):idx]
    assert "Syncing… <file>" in comment, "the sync live-file label is documented"
    assert '"Importing…"' in comment, "the (bare) upload label is documented"
    assert "Phase 90" in comment, "the unpack-only rework is documented"
    assert "A3" in comment, "the settle contract is documented"


# ---------- styles.css: the ellipsized live label ----------


def test_sync_label_css_ellipsis_truncation() -> None:
    """.sync-label: the live-file label ellipsizes a long
    source/relative/path inside the pill (A4) — inline-block with the
    min(16rem, 40vw) cap, overflow hidden, text-overflow ellipsis, no
    wrap, baseline-aligned; on mobile the pill goes full width with
    the label visible (the cap lifts, and min-width: 0 engages the
    ellipsis against the full width — the icon-only squeeze is
    gone)."""
    css = _css()
    block = re.search(r"\.sync-label\s*\{([^}]*)\}", css)
    assert block, "styles.css must style .sync-label"
    body = block.group(1)
    for prop in (
        "display: inline-block",
        "max-width: min(16rem, 40vw)",
        "overflow: hidden",
        "text-overflow: ellipsis",
        "white-space: nowrap",
        "vertical-align: bottom",
    ):
        assert prop in body, f".sync-label must carry {prop!r}"
    mobile = re.search(r"@media \(max-width: 640px\) \{([\s\S]*?)\n\}", css)
    assert mobile, "the ≤640px media query must stay"
    mbody = mobile.group(1)
    assert ".sync-btn { width: 100%; }" in mbody, (
        "the mobile Sync pill is full width (the icon-only squeeze is gone)"
    )
    assert ".sync-label { max-width: none; min-width: 0; }" in mbody, (
        "the label stays visible and ellipsizes against the full width"
    )


# =====================================================================
# Phase 64 task 05 — the Sources-page upload (git-sources.js)
# =====================================================================


# ---------- the "Successfully uploaded" toast (A2) ----------


def test_upload_toast_single_node_status_and_auto_dismiss() -> None:
    """showUploadToast (A2 owner-locked): the phase-55 share-toast
    pattern made page-local — a SINGLE node, lazy-created on the first
    202 and reused (toasts never stack): a plain ``<div class="toast">``
    appended to ``document.body``; ``role="status" aria-live="polite"``
    (on THIS page the toast is the a11y announcer for the 202); the
    text lands via ``textContent`` (XSS-safe — never innerHTML). A new
    toast replaces a pending one: clear the prior dismiss timer, remove
    the visible class, force a reflow (``offsetWidth`` — restarts the
    CSS transition), re-add the class. Auto-dismiss: the 5000ms
    (UPLOAD_TOAST_MS) timer is armed AFTER the visible class is added
    and removes the class on fire. The existing .toast CSS is reused
    as-is (no new styles)."""
    js = _gjs()
    body = _gfn(js, "showUploadToast")
    assert "if (!uploadToastEl)" in body, "the node is created once, on first use"
    assert 'document.createElement("div")' in body
    assert 'uploadToastEl.className = "toast"' in body, "the phase-55 .toast CSS, as-is"
    assert 'uploadToastEl.setAttribute("role", "status")' in body
    assert 'uploadToastEl.setAttribute("aria-live", "polite")' in body
    assert "document.body.appendChild(uploadToastEl)" in body
    assert "uploadToastEl.textContent = message" in body
    assert "innerHTML" not in body, "XSS contract: textContent only"
    # Single instance: module-scope node + timer.
    assert re.search(r"^let uploadToastEl = null", js, re.M), "the node is module scope"
    assert re.search(r"^let uploadToastTimer = 0", js, re.M), "the timer is module scope"
    assert "const UPLOAD_TOAST_MS = 5000" in js, "the ~5 s auto-dismiss (A2)"
    # Re-trigger order: clear dismiss → remove class → force reflow →
    # re-add the visible class.
    clear_i = body.find("clearTimeout(uploadToastTimer)")
    remove_i = body.find('uploadToastEl.classList.remove("is-visible")')
    reflow_i = body.find("void uploadToastEl.offsetWidth")
    add_i = body.find('uploadToastEl.classList.add("is-visible")')
    assert -1 < clear_i < remove_i < reflow_i < add_i, (
        "dismiss cleared → class removed → reflow forced → visible re-added"
    )
    # The auto-dismiss timer is armed AFTER the visible class is set.
    timer_i = body.find("setTimeout")
    assert -1 < add_i < timer_i and "UPLOAD_TOAST_MS" in body[timer_i:]
    assert 'uploadToastEl.classList.remove("is-visible")' in body[timer_i:], (
        "the pending dismiss removes the visible state"
    )


def test_toast_fires_on_202_with_the_safe_name() -> None:
    """The 202 branch of the upload submit (A1/A2): the 202 body
    (UploadAccepted) is parsed for the safe source name — a body parse
    failure degrades to the picked file's name — and the toast fires
    with `Successfully uploaded — <name>` BEFORE the scan finishes:
    the file input clears, the processing state enters, and the poll
    starts. The toast is the SINGLE success surface: exactly one call
    site in the whole page (definition + one call — never a failure
    branch, never the poll)."""
    js = _gjs()
    sub = _usubmit(js)
    i202 = sub.find("r.status === 202")
    i409 = sub.find("r.status === 409")
    assert -1 < i202 < i409, "the 202 branch precedes the 409 re-attach"
    branch = sub[i202:i409]
    assert "let name = file.name;" in branch, "the degrade-to-picked-name fallback"
    assert "await r.json()" in branch, "the UploadAccepted body is parsed"
    assert "data.name" in branch, "the safe source name comes from the 202 body"
    assert "lastUploadName = name" in branch, (
        "the accepted 202's safe name is recorded for the result line (phase 90)"
    )
    assert "showUploadToast(`Successfully uploaded — ${name}`)" in branch
    assert 'uploadFileInput.value = ""' in branch, "the file input clears at 202"
    assert "enterUploadProcessingState()" in branch
    assert "startUploadPolling()" in branch
    # Success-only: exactly the definition + the single 202 call.
    assert js.count("showUploadToast(") == 2, (
        "the definition + exactly ONE call site (the 202 branch)"
    )


# ---------- the processing state + the live label ----------


def test_processing_state_is_bare_for_the_whole_run() -> None:
    """Phase 90 (A2): the button's processing entry (202 / 409) is
    disabled, BARE "Processing…", title cleared — and the tick's
    RUNNING branch renders exactly that same bare label for the whole
    background run: the unpack has no file-level progress, so the
    phase-64 live-file interpolation is gone (no current_file, no
    "(n/m)" counts, no file in the title), then it reschedules at the
    2 s house cadence."""
    js = _gjs()
    state = _gfn(js, "enterUploadProcessingState")
    assert "uploadBtn.disabled = true" in state
    assert 'uploadBtn.textContent = "Processing…"' in state
    assert 'uploadBtn.title = "";' in state, "the title stays clear (no live file)"
    assert "const UPLOAD_POLL_MS = 2000" in js, "the SYNC_POLL_MS house value"
    tick = _utick(js)
    i_run = tick.find('status.state === "running"')
    i_stop = tick.find("stopUploadPolling();")
    assert -1 < i_run < i_stop, "the running branch precedes the terminal stop"
    run = tick[i_run:i_stop]
    assert 'uploadBtn.textContent = "Processing…"' in run, (
        "the bare label — no file, no counts (phase 90, A2)"
    )
    assert 'uploadBtn.title = "";' in run, "the title stays clear"
    assert "status.current_file" not in run, (
        "no live file — the scan's progress moved to the sync"
    )
    assert "files_total" not in run and "files_done" not in run, "no (n/m) counts"
    assert "uploadPollTimer = setTimeout(tick, UPLOAD_POLL_MS)" in run, "reschedule"


def test_fmt_upload_result_is_the_ready_for_sync_line() -> None:
    """Phase 90 (A2/A3): the result line reads the no-count
    {"message": "uploaded"} detail and renders "Uploaded <name> —
    press Sync sources to import it." (the name from the accepted
    202); without a name (a reload re-render, the 409 re-attach) it
    renders the nameless variant; the old sync-style count keys
    (added / updated / unchanged / pruned) are no longer read at all.
    The 202 branch records the safe name (lastUploadName); the poll's
    settle and the boot re-attach both render the line from
    (detail, lastUploadName); the button's idle label is "Upload"."""
    js = _gjs()
    body = _gfn(js, "fmtUploadResult")
    assert "function fmtUploadResult(detail, name)" in body
    assert 'detail.message === "uploaded"' in body
    assert "Uploaded ${name} — press Sync sources to import it." in body
    assert "Uploaded — press Sync sources to import it." in body, (
        "the nameless variant (reload / 409 re-attach)"
    )
    for key in ("added", "updated", "unchanged", "pruned"):
        assert key not in body, f"the sync-style count {key!r} is gone"
    # The 202 branch records the safe name for the settled line.
    sub = _usubmit(js)
    i202 = sub.find("r.status === 202")
    i409 = sub.find("r.status === 409")
    assert "lastUploadName = name" in sub[i202:i409]
    assert "let lastUploadName = null" in js, "page-local (null after a reload)"
    # Both render sites pass (detail, lastUploadName).
    assert "fmtUploadResult(detail, lastUploadName)" in _utick(js)
    assert "fmtUploadResult(status.detail, lastUploadName)" in _gfn(js, "initUploadStatus")
    # The button's idle label (static + the poll's restores).
    restore = _gfn(js, "restoreUploadButton")
    assert 'uploadBtn.textContent = "Upload"' in restore
    # The phase-64 scan-suffixed label is gone (exactly "Upload") — the
    # needles are split so this file carries no forbidden literal (the
    # phase-90 rg criterion sweeps frontend/ app/ tests/ for it).
    assert ("Upload " + "& scan") not in js and ("Upload " + "and scan") not in js


def test_start_upload_polling_double_start_guard() -> None:
    """startUploadPolling: single timer, one loop at a time — the
    first statement bails when a poll is already active (the guard a
    double 202/409 cannot bypass)."""
    js = _gjs()
    i = js.find("function startUploadPolling")
    assert i != -1
    head = js[i : i + 120]
    assert "if (uploadPollTimer !== null) return;" in head
    assert "let uploadPollTimer = null" in js, "null = no poll active"


# ---------- the 409 re-attach + the kept error branches ----------


def test_409_reattaches_without_an_error_banner() -> None:
    """409 (an upload is already in progress): NO error banner — the
    phase-49 "server detail inline" branch does not apply to 409
    anymore. It re-attaches to the in-flight run: the processing state
    + the poll (never stale). The OTHER non-2xx (422 format/name, 413
    cap, 5xx) keep the phase-49 apiDetail banner + the kept file
    selection; the network-failure fixed line stays."""
    js = _gjs()
    sub = _usubmit(js)
    i409 = sub.find("r.status === 409")
    assert i409 != -1
    branch = sub[i409 : sub.find("// Other non-2xx", i409)]
    assert "enterUploadProcessingState()" in branch
    assert "startUploadPolling()" in branch
    assert "uploadError" not in branch, "409 never raises the error banner"
    assert "apiDetail" not in branch, "no server-detail branch for 409 anymore"
    # The other non-2xx keeps the phase-49 convention (after the 409).
    i_err = sub.find('await apiDetail(r, "Could not upload the archive — try again.")')
    assert i_err > i409, "the other non-2xx branch follows the 409 re-attach (and was found)"
    assert "uploadError.hidden = false" in sub[i_err:], "the banner shows for the other non-2xx"
    assert "Could not upload the archive — is the app reachable?" in sub, "the network line stays"
    # The no-file guard + the short transfer label stay.
    assert "Choose an archive file to upload." in sub
    assert 'uploadBtn.textContent = "Uploading…"' in sub


# ---------- the poll's terminal decision tree ----------


def test_upload_polling_decision_tree() -> None:
    """The upload poll tick (task 05): fetches
    GET /api/git-sources/upload/status; a blip (non-ok / network /
    unparseable) reschedules — the tick never dies on a failed fetch.
    Then: running → live label + reschedule; ONE stop for the
    terminals; success → the result line (fmtUploadResult — the
    existing helper reads exactly these keys) + the announce + the row
    reload + the cleared file input + the restored button — NO toast
    (it already fired at the 202, A2); failed → the sanitized server
    error banner (A2 failure UI) + the restored button + the row
    reload (a post-swap failure keeps the row — the list state may
    have changed; the selection is kept for a one-click re-upload);
    idle → the defensive restore (a started run never returns to
    idle)."""
    tick = _utick(_gjs())
    assert 'fetch("/api/git-sources/upload/status")' in tick
    # The blip branch reschedules.
    i_blip = tick.find("if (!status)")
    assert i_blip != -1
    assert "uploadPollTimer = setTimeout(tick, UPLOAD_POLL_MS)" in tick[i_blip:i_blip + 150]
    # One stop, placed after the running branch and before the terminals.
    assert tick.count("stopUploadPolling()") == 1
    i_run = tick.find('status.state === "running"')
    i_stop = tick.find("stopUploadPolling();")
    i_ok = tick.find('status.state === "success"')
    i_fail = tick.find('status.state === "failed"')
    assert -1 < i_run < i_stop < i_ok < i_fail, "running < stop < success < failed"
    # success: the ready-for-sync line (phase 90 A2/A3) + the
    # next-step announce + reload, NO toast.
    ok = tick[i_ok:i_fail]
    for line in (
        "fmtUploadResult(detail, lastUploadName)",
        "uploadResult.hidden = false",
        'announce("Archive uploaded — press Sync sources to import it.")',
        'uploadFileInput.value = ""',
        "restoreUploadButton()",
        "loadSources()",
    ):
        assert line in ok, f"the success settle must carry {line!r}"
    assert "showUploadToast" not in tick, "no toast in the poll — it fired at the 202 (A2)"
    # failed: the sanitized error banner + reload.
    fail = tick[i_fail:]
    assert "status.error" in fail
    assert "uploadError.hidden = false" in fail
    assert "restoreUploadButton()" in fail
    assert "loadSources()" in fail, "the list state may have changed"
    # idle: the defensive fall-through — a final restore, no more state
    # checks after the failed branch.
    i_idle = tick.rfind("restoreUploadButton()")
    assert i_idle > i_fail
    assert "state ===" not in tick[i_idle:], "the idle settle is the fall-through"


# ---------- the finally's never-restore-while-polling guard ----------


def test_finally_restores_only_when_no_poll_active() -> None:
    """The submit finally (PLAN §7.4): the button is restored ONLY
    when no poll is active (``uploadPollTimer === null``) — while
    startUploadPolling owns the button (the 202 / 409 paths) it stays
    disabled / "Processing…", so an unconditional finally restore
    would race the poll and leave a stale-looking idle button under a
    running scan."""
    sub = _usubmit(_gjs())
    i = sub.find("} finally {")
    assert i != -1
    fin = sub[i:]
    assert "if (uploadPollTimer === null)" in fin, "the guard: no poll → the button is ours"
    assert "restoreUploadButton()" in fin
    assert "uploadBtn.disabled = false" not in fin, "no unconditional restore in the finally"


# ---------- the boot re-attach ----------


def test_boot_reattach_branches() -> None:
    """initUploadStatus (the admin branch of the boot): the upload
    status is fetched ONCE. running → the processing state + the poll
    (a reload mid-scan re-attaches — no second upload, no error, no
    toast); success → the last result line ONLY (no announce, no
    toast — A2); failed → the error banner; idle → nothing (no
    branch). The boot IIFE awaits it right after loadSources()."""
    js = _gjs()
    body = _gfn(js, "initUploadStatus")
    assert body.count('fetch("/api/git-sources/upload/status")') == 1, "fetched ONCE at boot"
    i_run = body.find('status.state === "running"')
    i_ok = body.find('status.state === "success"')
    i_fail = body.find('status.state === "failed"')
    assert -1 < i_run < i_ok < i_fail
    run = body[i_run:i_ok]
    assert "enterUploadProcessingState()" in run
    assert "startUploadPolling()" in run
    assert "uploadError" not in run and "showUploadToast" not in run
    ok = body[i_ok:i_fail]
    # The last result line — the nameless variant after a reload
    # (lastUploadName is null: the safe name was page-local, phase 90).
    assert "fmtUploadResult(status.detail, lastUploadName)" in ok
    assert "uploadResult.hidden = false" in ok
    assert "announce(" not in ok, "no announce at boot (A2)"
    assert "showUploadToast" not in ok, "no toast at boot (A2)"
    fail = body[i_fail:]
    assert "status.error" in fail
    assert "uploadError.hidden = false" in fail
    assert 'status.state === "idle"' not in body, "idle does nothing — no branch"
    # The mount's tail (phase 76 task 02 — the boot IIFE is gone):
    # after the list loads, the re-attach runs (admin branch only — the
    # anonymous path returns before it), and it is the LAST statement
    # of mount(root).
    i_boot = js.rfind("await loadSources();")
    tail = js[i_boot:i_boot + 400]
    assert "await initUploadStatus();" in tail
    assert "})();" not in js, "the top-level boot IIFE is gone (mount owns boot)"
    assert tail.rstrip().removesuffix("}").rstrip().endswith("await initUploadStatus();")


# ---------- the page comment ----------


def test_git_sources_html_comment_documents_the_202_contract() -> None:
    """The #archive-upload-form comment in the shell's Sources view
    (formerly git-sources.html) documents the phase-64 202 contract
    (the phase-49 synchronous paragraph marked superseded): the 202 =
    "safely on disk" + the JS-created toast (no markup), the bare
    "Processing…" label via the status poll, the 409 re-attach without
    an error banner — and phase 90's unpack-only rework (the run is
    UNPACK + REGISTER ONLY and the success line points at the RAG
    page's "Sync sources" button)."""
    html = _ghtml()
    idx = html.find('id="archive-upload-form"')
    assert idx != -1
    comment = html[max(0, idx - 1600):idx]
    assert "Phase 64" in comment
    assert "superseded" in comment, "the phase-49 synchronous paragraph is marked superseded"
    assert "Successfully uploaded" in comment, "the toast is documented"
    assert "Processing…" in comment, "the (now bare) label is documented"
    assert "GET /api/git-sources/upload/status" in comment, "the polling endpoint"
    assert "409 re-attaches" in comment, "the re-attach without an error banner"
    assert "Phase 90" in comment, "the unpack-only rework is documented"
    assert "UNPACK + REGISTER ONLY" in comment
    assert "Sync sources" in comment, "the result line points at the RAG page's button"