"""Orphan-file sweep: remove on-disk cruft no ready asset owns (old accented dirs, stale posters),
while never touching system trees, owned files, or freshly-written downloads."""
import os
import time
from pathlib import Path

from app.downloads.gc import _sweep_orphan_files


class _Scalars:
    def __init__(self, rows):
        self._rows = rows

    def scalars(self):
        return list(self._rows)


class _StubDB:
    """Minimal stand-in: `_sweep_orphan_files` only issues one select for ready rel_paths."""

    def __init__(self, rel_paths):
        self._rel_paths = rel_paths

    def execute(self, _stmt):
        return _Scalars(self._rel_paths)


def _aged(path: Path, hours: float) -> None:
    old = time.time() - hours * 3600
    os.utime(path, (old, old))


def test_sweep_removes_orphans_but_keeps_owned_system_and_fresh(tmp_path: Path):
    root = tmp_path
    # An owned asset (in the keep set) + its sidecars.
    kept_dir = root / "Chan" / "Season_2026"
    kept_dir.mkdir(parents=True)
    kept_media = kept_dir / "Chan_-_2026-01-01_-_Title_vid_a1.mp4"
    for p in (kept_media, kept_media.with_suffix(".nfo"), kept_media.with_suffix(".jpg")):
        p.write_bytes(b"x")
        _aged(p, 5)  # old, but owned → must survive

    # An orphan poster in a stale (e.g. old accented) channel dir — old, unowned → swept.
    orphan_dir = root / "OldChan" / "Season_2026"
    orphan_dir.mkdir(parents=True)
    orphan = orphan_dir / "OldChan_-_old_title_vid.jpg"
    orphan.write_bytes(b"x")
    _aged(orphan, 5)

    # A system tree (storyboards) — never touched, even when old.
    sysfile = root / ".storyboards" / "asset-1.jpg"
    sysfile.parent.mkdir()
    sysfile.write_bytes(b"x")
    _aged(sysfile, 5)

    # A brand-new unowned file (an in-flight download's just-placed output) — too young to sweep.
    fresh_dir = root / "FreshChan" / "Season_2026"
    fresh_dir.mkdir(parents=True)
    fresh = fresh_dir / "FreshChan_-_now_vid_a2.mp4"
    fresh.write_bytes(b"x")  # mtime = now

    db = _StubDB(["Chan/Season_2026/Chan_-_2026-01-01_-_Title_vid_a1.mp4"])
    removed = _sweep_orphan_files(db, str(root))

    assert removed == 1  # only the aged orphan
    assert kept_media.exists() and kept_media.with_suffix(".jpg").exists()
    assert not orphan.exists() and not orphan_dir.exists()  # orphan + its emptied dirs pruned
    assert not (root / "OldChan").exists()
    assert sysfile.exists()  # system tree untouched
    assert fresh.exists()  # too new to sweep