"""A Facebook download's title when the signed-in read gives only a placeholder.

Measured on prod (2026-11-01): every Facebook download since 2026-10-28 is titled "Facebook" — the
signed-in read (the owner's cookie) now gives that placeholder and NO description, so the adapter had
no post text to fall back on, and the download name copied the placeholder too. A signed-out read of
the same reel (yt-dlp 2026.08.19, as on prod) still carries the post's text in its description.
"""

from app.config import settings
from app.downloads import adapters, backfill, pipeline
from app.downloads.models import DownloadJob, MediaAsset

_URL = "https://www.facebook.com/reel/1860682468422402/"
# The measured signed-out read of that reel.
_PUBLIC = {
    "title": "163K reactions · 14K shares | sorry not helping #workhumor #officelife | Work dot exe",
    "description": "sorry not helping\n\n#workhumor #officelife",
    "uploader": "Work dot exe",
}


def _fake_ydl(monkeypatch, outcome):
    """yt-dlp faked at its `YoutubeDL` boundary: records each read's options, answers `outcome`."""
    seen: list[dict] = []

    class FakeYDL:
        def __init__(self, opts):
            seen.append(opts)

        def __enter__(self):
            return self

        def __exit__(self, *exc):
            return False

        def extract_info(self, url, download):
            return outcome

    monkeypatch.setattr(backfill.yt_dlp, "YoutubeDL", FakeYDL)
    return seen


def test_a_placeholder_with_nothing_behind_it_takes_the_signed_out_pages_text(monkeypatch):
    seen = _fake_ydl(monkeypatch, _PUBLIC)
    fb = adapters.FacebookAdapter()

    info = backfill.public_title_info({"title": "Facebook", "description": None}, _URL, fb, 7)

    assert fb.title(info) == "sorry not helping"
    # One metadata-only read, and signed out: no cookie goes with it.
    assert len(seen) == 1
    assert seen[0]["skip_download"] is True
    assert not seen[0].get("cookiefile")


def test_a_real_title_reads_nothing_more(monkeypatch):
    seen = _fake_ydl(monkeypatch, _PUBLIC)
    info = {"title": "Funny Dark Humor Dad Joke!", "description": None}

    assert backfill.public_title_info(info, _URL, adapters.FacebookAdapter(), 7) is info
    assert seen == []


def test_a_placeholder_the_signed_out_page_cannot_better_stays(monkeypatch):
    _fake_ydl(monkeypatch, {"title": "Facebook", "description": None})
    fb = adapters.FacebookAdapter()

    info = backfill.public_title_info({"title": "Facebook", "description": None}, _URL, fb, 7)

    assert fb.title(info) == "Facebook"


def test_another_source_is_never_read_again(monkeypatch):
    seen = _fake_ydl(monkeypatch, _PUBLIC)
    info = {"title": "Video", "description": None}

    assert backfill.public_title_info(info, _URL, adapters.SourceAdapter(), 7) is info
    assert seen == []


def test_the_backfill_retitles_a_placeholder_download_and_the_names_that_repeated_it(
    db, make_user, monkeypatch
):
    _fake_ydl(monkeypatch, _PUBLIC)
    owner, other = make_user(), make_user()
    asset = MediaAsset(
        source_kind="url",
        source_ref=_URL,
        format_sig="fb",
        status="ready",
        rel_path="facebook/x.mp4",
        poster_path="facebook/x.jpg",
        uploader_url="https://www.facebook.com/1",
        title="Facebook",
        ref_count=2,
    )
    db.add(asset)
    db.flush()
    copied = DownloadJob(
        user_id=owner.id,
        asset_id=asset.id,
        source_kind="url",
        source_ref=_URL,
        status="done",
        queue_pos=0,
        profile_snapshot={},
        display_name="Facebook",
    )
    renamed = DownloadJob(
        user_id=other.id,
        asset_id=asset.id,
        source_kind="url",
        source_ref=_URL,
        status="done",
        queue_pos=0,
        profile_snapshot={},
        display_name="Office jokes",
    )
    db.add_all([copied, renamed])
    db.commit()

    assert backfill.run()["retitled"] == 1

    db.expire_all()
    assert db.get(MediaAsset, asset.id).title == "sorry not helping"
    assert db.get(DownloadJob, copied.id).display_name == "sorry not helping"
    assert db.get(DownloadJob, renamed.id).display_name == "Office jokes"
    # Run again: nothing left to retitle, and no page read for it.
    assert backfill.run()["retitled"] == 0


def test_a_download_titled_facebook_is_named_from_the_signed_out_page(
    db, make_user, monkeypatch, tmp_path
):
    # The whole download path with yt-dlp and the media tools faked: the signed-in read gives only
    # the placeholder, and the file and the download's name get the post's text.
    _fake_ydl(monkeypatch, _PUBLIC)
    monkeypatch.setattr(settings, "files_root", str(tmp_path))
    monkeypatch.setattr(pipeline.urlguard, "check_url", lambda url: None)
    monkeypatch.setattr(pipeline, "_ensure_phone_safe", lambda _j, produced, *_a: produced)
    monkeypatch.setattr(
        pipeline.probe, "resolve_media_facts", lambda produced, info: ("h264", "aac", 720, 1280, 9)
    )
    monkeypatch.setattr(pipeline.editmod, "thumbnail_to_jpg", lambda *a: None)
    monkeypatch.setattr(pipeline.editmod, "ensure_poster", lambda *a: None)
    owner = make_user()
    asset = MediaAsset(
        source_kind="url", source_ref=_URL, format_sig="fb", status="downloading", ref_count=1
    )
    db.add(asset)
    db.flush()
    job = DownloadJob(
        user_id=owner.id,
        asset_id=asset.id,
        source_kind="url",
        source_ref=_URL,
        status="running",
        queue_pos=0,
        profile_snapshot={},
    )
    db.add(job)
    db.commit()

    def signed_in_read(job_id, asset_id, url, spec, staging, adapter, **kw):
        f = staging / "1860682468422402.mp4"
        f.write_bytes(b"v" * 100)
        return {
            "id": "1860682468422402",
            "title": "Facebook",
            "uploader": "Work dot exe",
            "requested_downloads": [{"filepath": str(f)}],
        }

    monkeypatch.setattr(pipeline, "_extract_with_fallback", signed_in_read)
    pipeline._download(job.id, asset.id, "url", _URL, {}, owner.id)

    db.expire_all()
    assert db.get(DownloadJob, job.id).status == "done"
    assert db.get(MediaAsset, asset.id).title == "sorry not helping"
    assert db.get(DownloadJob, job.id).display_name == "sorry not helping"