"""Regression tests for live browser refresh after a Get-Info edit.

The bug: renaming a track's artist left the column browser (and its filter)
pointing at the old name, so the renamed artist didn't re-sort and clicking it
returned no tracks. The fix routes a new `track_fields_edited(track_id, fields)`
signal to the library view, which rebuilds the browser only when a field it
groups by changed — and leaves play-count/skip bumps alone.
"""

from lintunes.models import Library, Track
from lintunes.library_manager import LibraryManager
from lintunes.gui.library_view import _BROWSER_FIELDS


def _manager(tmp_path):
    track = Track(track_id=1, name="Song", artist="Aardvark",
                  album="Debut", genre="Rock")
    library = Library(tracks={1: track})
    return LibraryManager(library, tmp_path), track


def test_edit_emits_changed_fields(qapp, tmp_path):
    manager, _track = _manager(tmp_path)
    edits, updates = [], []
    manager.track_fields_edited.connect(lambda tid, fields: edits.append((tid, fields)))
    manager.track_updated.connect(updates.append)

    manager.update_track_fields(1, {"artist": "Zz Top"})

    assert edits == [(1, ["artist"])]
    assert updates == [1]
    assert _BROWSER_FIELDS.intersection(edits[0][1])  # would refresh the browser


def test_no_op_edit_is_silent(qapp, tmp_path):
    manager, _track = _manager(tmp_path)
    edits = []
    manager.track_fields_edited.connect(lambda tid, fields: edits.append((tid, fields)))

    manager.update_track_fields(1, {"artist": "Aardvark"})  # unchanged value

    assert edits == []


def test_play_count_does_not_reorganize(qapp, tmp_path):
    """record_play bumps play_count via track_updated but must NOT emit
    track_fields_edited, so a finished play never rebuilds the browser."""
    manager, _track = _manager(tmp_path)
    edits, updates = [], []
    manager.track_fields_edited.connect(lambda tid, fields: edits.append((tid, fields)))
    manager.track_updated.connect(updates.append)

    manager.record_play(1)

    assert edits == []
    assert updates == [1]