import pytest
from src.core.file import File
from src.core.file_manager import FileManager
from src.core.tag_manager import TagManager
from src.core.tag import Tag


@pytest.fixture
def temp_global_config(tmp_path, monkeypatch):
    """Point the global config file at a throwaway path for each test."""
    config_path = tmp_path / "test_config.json"
    import src.core.config as config_module
    monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
    return config_path


@pytest.fixture
def tag_manager():
    return TagManager()


@pytest.fixture
def file_manager(tag_manager, temp_global_config):
    return FileManager(tag_manager)


def _in_memory_files(tmp_path, tag_manager, *names):
    """Create real files and wrap them as index-less (in-memory) File objects."""
    files = []
    for name in names:
        path = tmp_path / name
        path.write_text("content")
        files.append(File(path, tag_manager))
    return files


class TestFileManager:
    """Basic FileManager state."""

    def test_file_manager_creation(self, file_manager, tag_manager):
        assert file_manager.filelist == []
        assert file_manager.tagmanager == tag_manager
        assert file_manager.global_config is not None
        assert file_manager.index is None


class TestFileManagerTagOperations:
    """assign/remove tag operations over the loaded file list."""

    def test_assign_tag_to_file_objects_tag_object(self, file_manager, tmp_path, tag_manager):
        files = _in_memory_files(tmp_path, tag_manager, "f1.txt", "f2.txt")
        file_manager.filelist = files
        tag = Tag("Video", "HD")

        file_manager.assign_tag_to_file_objects(files, tag)

        for f in files:
            assert tag in f.tags

    def test_assign_tag_string_with_category(self, file_manager, tmp_path, tag_manager):
        files = _in_memory_files(tmp_path, tag_manager, "f1.txt")
        file_manager.filelist = files

        file_manager.assign_tag_to_file_objects(files, "Video/4K")

        tag_paths = {tag.full_path for tag in files[0].tags}
        assert "Video/4K" in tag_paths

    def test_assign_tag_string_without_category(self, file_manager, tmp_path, tag_manager):
        files = _in_memory_files(tmp_path, tag_manager, "f1.txt")
        file_manager.filelist = files

        file_manager.assign_tag_to_file_objects(files, "SimpleTag")

        tag_paths = {tag.full_path for tag in files[0].tags}
        assert "default/SimpleTag" in tag_paths

    def test_assign_tag_no_duplicate(self, file_manager, tmp_path, tag_manager):
        files = _in_memory_files(tmp_path, tag_manager, "f1.txt")
        file_manager.filelist = files
        tag = Tag("Video", "HD")

        file_manager.assign_tag_to_file_objects(files, tag)
        file_manager.assign_tag_to_file_objects(files, tag)

        count = sum(1 for t in files[0].tags if t == tag)
        assert count == 1

    def test_remove_tag_from_file_objects(self, file_manager, tmp_path, tag_manager):
        files = _in_memory_files(tmp_path, tag_manager, "f1.txt", "f2.txt")
        file_manager.filelist = files
        tag = Tag("Video", "HD")

        file_manager.assign_tag_to_file_objects(files, tag)
        file_manager.remove_tag_from_file_objects(files, tag)

        for f in files:
            assert tag not in f.tags

    def test_remove_tag_string(self, file_manager, tmp_path, tag_manager):
        files = _in_memory_files(tmp_path, tag_manager, "f1.txt")
        file_manager.filelist = files

        file_manager.assign_tag_to_file_objects(files, "Video/HD")
        file_manager.remove_tag_from_file_objects(files, "Video/HD")

        tag_paths = {tag.full_path for tag in files[0].tags}
        assert "Video/HD" not in tag_paths

    def test_callback_on_tag_change(self, file_manager, tmp_path, tag_manager):
        files = _in_memory_files(tmp_path, tag_manager, "f1.txt")
        file_manager.filelist = files
        callback_calls = []
        file_manager.on_files_changed = lambda filelist: callback_calls.append(len(filelist))

        file_manager.assign_tag_to_file_objects([files[0]], Tag("Test", "Tag"))

        assert len(callback_calls) == 1


class TestFileManagerFiltering:
    """filter_files_by_tags over the loaded file list."""

    @pytest.fixture
    def loaded(self, file_manager, tmp_path, tag_manager):
        files = _in_memory_files(tmp_path, tag_manager, "f1.txt", "f2.txt", "f3.txt")
        file_manager.filelist = files
        return file_manager

    def test_filter_empty_tags_returns_all(self, loaded):
        assert len(loaded.filter_files_by_tags([])) == len(loaded.filelist)

    def test_filter_none_returns_all(self, loaded):
        assert len(loaded.filter_files_by_tags(None)) == len(loaded.filelist)

    def test_filter_by_single_tag(self, loaded):
        tag = Tag("Video", "HD")
        loaded.assign_tag_to_file_objects(loaded.filelist[:2], tag)

        filtered = loaded.filter_files_by_tags([tag])
        assert len(filtered) == 2
        for f in filtered:
            assert tag in f.tags

    def test_filter_by_multiple_tags_and_logic(self, loaded):
        tag1 = Tag("Video", "HD")
        tag2 = Tag("Audio", "Stereo")
        loaded.assign_tag_to_file_objects([loaded.filelist[0]], tag1)
        loaded.assign_tag_to_file_objects([loaded.filelist[0]], tag2)
        loaded.assign_tag_to_file_objects([loaded.filelist[1]], tag1)

        filtered = loaded.filter_files_by_tags([tag1, tag2])
        assert len(filtered) == 1
        assert filtered[0] == loaded.filelist[0]

    def test_filter_by_tag_strings(self, loaded):
        loaded.assign_tag_to_file_objects([loaded.filelist[0]], "Video/HD")
        assert len(loaded.filter_files_by_tags(["Video/HD"])) == 1

    def test_filter_no_match(self, loaded):
        assert len(loaded.filter_files_by_tags([Tag("NonExistent", "Tag")])) == 0


class TestFileManagerEdgeCases:
    def test_empty_filelist_operations(self, file_manager):
        assert file_manager.filter_files_by_tags([Tag("Video", "HD")]) == []
        file_manager.assign_tag_to_file_objects([], Tag("Video", "HD"))
        assert len(file_manager.filelist) == 0

    def test_assign_tag_to_empty_list(self, file_manager):
        file_manager.assign_tag_to_file_objects([], Tag("Test", "Tag"))  # no exception

    def test_remove_nonexistent_tag(self, file_manager, tmp_path, tag_manager):
        file_manager.filelist = _in_memory_files(tmp_path, tag_manager, "file.txt")
        file_manager.remove_tag_from_file_objects(
            file_manager.filelist, Tag("NonExistent", "Tag"))  # no exception


class TestPoolManagement:
    """Testy pro pool a copy-as-is složky"""

    @pytest.fixture
    def temp_global_config(self, tmp_path, monkeypatch):
        config_path = tmp_path / "test_config.json"
        import src.core.config as config_module
        monkeypatch.setattr(config_module, 'GLOBAL_CONFIG_FILE', config_path)
        return config_path

    @pytest.fixture
    def file_manager(self, temp_global_config):
        return FileManager(TagManager())

    def test_set_pool_creates_top_level_folders(self, file_manager, tmp_path):
        pool = tmp_path / "pool"
        file_manager.set_pool_dir(pool)

        assert (pool / "Filmy").is_dir()
        assert (pool / "Seriály").is_dir()
        assert file_manager.pool_dir == pool

    def test_import_movie_copies_and_indexes(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        source = tmp_path / "raw.mkv"
        source.write_bytes(b"x" * 10)

        movie = file_manager.import_movie(source, "Matrix")

        assert movie.file_path == tmp_path / "pool" / "Filmy" / "Matrix.mkv"
        assert source.exists()  # non-destructive copy
        assert movie.title == "Matrix"
        assert file_manager.index.record_for(movie.file_path) is not None

    def test_statistics_aggregates_pool(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"x" * 100)
        (tmp_path / "b.mkv").write_bytes(b"y" * 50)
        a = file_manager.import_movie(tmp_path / "a.mkv", "A")
        a.add_tag("Žánr/Akční")
        a.add_tag("Žánr/Sci-Fi")
        a.meta = {"rating": 90}
        a.save_metadata()
        b = file_manager.import_movie(tmp_path / "b.mkv", "B")
        b.add_tag("Žánr/Akční")

        s = file_manager.statistics()
        assert s["count"] == 2
        assert s["total_size"] == 150
        assert s["with_nfo"] == 1 and s["without_nfo"] == 1
        assert s["untagged"] == 0
        assert s["avg_rating"] == 90
        # Akční on both movies → count 2, sorted first
        assert dict(s["categories"]["Žánr"])["Akční"] == 2
        assert s["categories"]["Žánr"][0] == ("Akční", 2)

    def test_check_data_consistency_clean(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        file_manager.import_movie(tmp_path / "a.mkv", "Matrix")

        result = file_manager.check_data_consistency()
        assert result["ok"]
        assert result["missing"] == []
        assert result["untracked"] == []
        assert result["index_count"] == 1 and result["disk_count"] == 1

    def test_check_data_consistency_detects_missing_file(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Matrix")
        movie.file_path.unlink()  # someone deleted the file directly

        result = file_manager.check_data_consistency()
        assert result["missing"] == ["Filmy/Matrix.mkv"]
        assert result["untracked"] == []

    def test_check_data_consistency_detects_untracked_file(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        file_manager.import_movie(tmp_path / "a.mkv", "Matrix")
        # a file dropped into the pool without importing
        (file_manager.movies_dir / "Sneaked.mkv").write_bytes(b"x")

        result = file_manager.check_data_consistency()
        assert result["missing"] == []
        assert result["untracked"] == ["Filmy/Sneaked.mkv"]

    def test_import_movie_records_added_timestamp(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        source = tmp_path / "raw.mkv"
        source.write_bytes(b"x")
        movie = file_manager.import_movie(source, "Matrix")

        assert movie.added is not None
        # parseable ISO timestamp, persisted in the index
        from datetime import datetime
        datetime.fromisoformat(movie.added)
        assert file_manager.index.record_for(movie.file_path)["added"] == movie.added

    def test_import_movie_move_removes_source(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        source = tmp_path / "raw.mkv"
        source.write_bytes(b"x" * 10)

        movie = file_manager.import_movie(source, "Matrix", move=True)

        assert movie.file_path == tmp_path / "pool" / "Filmy" / "Matrix.mkv"
        assert movie.file_path.exists()
        assert not source.exists()  # moved, not copied

    def test_filmoteka_category_roots_from_schema(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_tag_schema([
            {"category": "Žánr", "csfd_field": "genres", "transform": None, "filmoteka_root": ""},
            {"category": "Rok", "csfd_field": "year", "transform": None, "filmoteka_root": "Dle roku"},
            {"category": "Herec", "csfd_field": "actors", "transform": None, "filmoteka_root": None},
        ])
        roots = file_manager.filmoteka_category_roots()
        assert roots == {"Žánr": "", "Rok": "Dle roku"}  # None-root excluded
        assert "Herec" not in roots

    def test_import_movie_suffix_keeps_both(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        (tmp_path / "b.mkv").write_bytes(b"b")
        first = file_manager.import_movie(tmp_path / "a.mkv", "Matrix")
        second = file_manager.import_movie(tmp_path / "b.mkv", "Matrix")  # default suffix

        assert first.file_path.name == "Matrix.mkv"
        assert second.file_path.name == "Matrix_1.mkv"
        assert len(file_manager.filelist) == 2

    def test_import_movie_replace_evicts_existing(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        (tmp_path / "b.mkv").write_bytes(b"bb")
        first = file_manager.import_movie(tmp_path / "a.mkv", "Matrix")
        first.add_tag("Žánr/Akční")
        old_path = first.file_path

        second = file_manager.import_movie(
            tmp_path / "b.mkv", "Matrix", on_conflict="replace")

        assert second.file_path.name == "Matrix.mkv"
        assert second.file_path == old_path  # same name reused
        assert second.file_path.read_bytes() == b"bb"  # new content in place
        assert [f.file_path.name for f in file_manager.filelist] == ["Matrix.mkv"]
        # index record reflects the new import (fresh metadata, old tags dropped)
        record = file_manager.index.record_for(second.file_path)
        assert record is not None
        assert record["tags"] == []
        assert second.tags == []

    def test_import_movie_replace_across_extensions(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        (tmp_path / "b.mp4").write_bytes(b"b")
        file_manager.import_movie(tmp_path / "a.mkv", "Matrix")
        file_manager.import_movie(tmp_path / "b.mp4", "Matrix", on_conflict="replace")

        names = [f.file_path.name for f in file_manager.filelist]
        assert names == ["Matrix.mp4"]
        assert not (tmp_path / "pool" / "Filmy" / "Matrix.mkv").exists()

    def test_import_movie_skip_returns_none(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        (tmp_path / "b.mkv").write_bytes(b"b")
        file_manager.import_movie(tmp_path / "a.mkv", "Matrix")
        result = file_manager.import_movie(tmp_path / "b.mkv", "Matrix", on_conflict="skip")

        assert result is None
        assert len(file_manager.filelist) == 1

    def test_rename_movie_renames_file_and_reindexes(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        source = tmp_path / "raw.mkv"
        source.write_bytes(b"x" * 10)
        movie = file_manager.import_movie(source, "Matrix")
        movie.add_tag("Žánr/Sci-Fi")
        old_path = movie.file_path

        file_manager.rename_movie(movie, "Matrix Reloaded")

        new_path = tmp_path / "pool" / "Filmy" / "Matrix Reloaded.mkv"
        assert movie.file_path == new_path
        assert new_path.exists()
        assert not old_path.exists()
        assert movie.title == "Matrix Reloaded"
        # metadata moved to the new key, old key gone, tags preserved
        assert file_manager.index.record_for(new_path) is not None
        assert file_manager.index.record_for(old_path) is None
        # a fresh manager reading the index sees the renamed file with its tags
        reloaded = FileManager(TagManager())
        reloaded.set_pool_dir(tmp_path / "pool")
        reloaded.load_pool_movies()
        assert [f.filename for f in reloaded.filelist] == ["Matrix Reloaded.mkv"]
        assert "Žánr/Sci-Fi" in {t.full_path for t in reloaded.filelist[0].tags}

    def test_rename_movie_preserves_extension(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        source = tmp_path / "raw.mp4"
        source.write_bytes(b"x")
        movie = file_manager.import_movie(source, "Film")

        file_manager.rename_movie(movie, "Jiný název")

        assert movie.file_path.name == "Jiný název.mp4"

    def test_rename_movie_rejects_existing_name(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        (tmp_path / "b.mkv").write_bytes(b"b")
        first = file_manager.import_movie(tmp_path / "a.mkv", "Already")
        second = file_manager.import_movie(tmp_path / "b.mkv", "Other")

        with pytest.raises(FileExistsError):
            file_manager.rename_movie(second, "Already")
        # second movie is left untouched
        assert second.file_path.name == "Other.mkv"
        assert first.file_path.exists()

    def test_rename_movie_rejects_empty_name(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Name")

        with pytest.raises(ValueError):
            file_manager.rename_movie(movie, "   ")

    def test_import_movie_with_year_uses_convention(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        source = tmp_path / "raw.mkv"
        source.write_bytes(b"x" * 10)

        movie = file_manager.import_movie(source, "Matrix", year=1999)

        assert movie.file_path.name == "Matrix (1999).mkv"
        assert movie.title == "Matrix"  # clean title, no year

    def test_import_movie_with_tmdb_id_names_for_jellyfin(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "raw.mkv").write_bytes(b"x")

        movie = file_manager.import_movie(
            tmp_path / "raw.mkv", "Matrix", year=1999, tmdb_id=603)

        assert movie.file_path.name == "Matrix (1999) [tmdbid-603].mkv"
        assert movie.title == "Matrix"  # clean title, no year/id

    def test_import_movie_with_3d_format(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "raw.mkv").write_bytes(b"x")

        movie = file_manager.import_movie(
            tmp_path / "raw.mkv", "Avatar", year=2009, tmdb_id=19995, format_3d="hsbs")

        assert movie.file_path.name == "Avatar (2009) [tmdbid-19995].3D.HSBS.mkv"

    def test_libraries_default_and_derivation(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        assert file_manager.libraries == [
            {"name": "Filmy", "kind": "movie"},
            {"name": "Seriály", "kind": "series"},
        ]
        assert file_manager.movie_libraries == ["Filmy"]
        assert file_manager.copyasis_folders == ["Seriály"]

    def test_set_libraries_with_all_kinds(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_libraries([
            {"name": "Hlavní", "kind": "mixed"},
            {"name": "Dokumenty", "kind": "mixed"},
            {"name": "Anime", "kind": "series"},
            {"name": "Chajda", "kind": "homevideo"},
        ])
        assert file_manager.copyasis_folders == ["Anime"]
        assert file_manager.movie_libraries == ["Filmy"]  # none of kind movie → fallback
        assert file_manager.libraries_of_kind("mixed") == ["Hlavní", "Dokumenty"]
        assert file_manager.libraries_of_kind("homevideo") == ["Chajda"]

    def test_set_pool_dir_creates_all_library_folders(self, file_manager, tmp_path):
        pool = tmp_path / "pool"
        file_manager.set_pool_dir(pool)
        file_manager.set_libraries([
            {"name": "Hlavní", "kind": "mixed"},
            {"name": "Chajda", "kind": "homevideo"},
        ])
        file_manager.set_pool_dir(pool)  # re-run creates the newly defined folders
        assert (pool / "Hlavní").is_dir()
        assert (pool / "Chajda").is_dir()

    def test_mixed_library_loads_movies_not_episodes(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_libraries([{"name": "Hlavní", "kind": "mixed"}])
        hlavni = tmp_path / "pool" / "Hlavní"
        hlavni.mkdir(parents=True, exist_ok=True)
        (hlavni / "Matrix (1999) [tmdbid-603].mkv").write_bytes(b"x")  # movie (top level)
        ep = hlavni / "Breaking Bad (2008) [tmdbid-1396]" / "Season 01"
        ep.mkdir(parents=True)
        (ep / "S01E01 - pilot.mkv").write_bytes(b"y")  # series episode (subfolder)

        file_manager.load_pool_movies()
        names = [f.filename for f in file_manager.filelist]
        assert names == ["Matrix (1999) [tmdbid-603].mkv"]  # episode not loaded as movie
        assert file_manager.library_of(file_manager.filelist[0]) == "Hlavní"

    def test_libraries_accepting_movies(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_libraries([
            {"name": "Filmy", "kind": "movie"},
            {"name": "Hlavní", "kind": "mixed"},
            {"name": "Anime", "kind": "series"},
        ])
        assert file_manager.libraries_accepting_movies == ["Filmy", "Hlavní"]

    def test_orphan_folder_cleanup(self, file_manager, tmp_path):
        pool = tmp_path / "pool"
        file_manager.set_pool_dir(pool)
        file_manager.set_libraries([{"name": "Filmy", "kind": "movie"}])
        (pool / "OldKids").mkdir()  # empty orphan
        (pool / "OldStuff").mkdir()
        (pool / "OldStuff" / "film.mkv").write_bytes(b"x")  # non-empty orphan

        orphans = dict(file_manager.orphan_pool_folders())
        assert orphans.get("OldKids") is True
        assert orphans.get("OldStuff") is False
        assert "Filmy" not in orphans  # a configured library is not an orphan

        assert file_manager.remove_empty_pool_folder("OldKids") is True
        assert not (pool / "OldKids").exists()
        assert file_manager.remove_empty_pool_folder("OldStuff") is False  # non-empty
        assert file_manager.remove_empty_pool_folder("Filmy") is False  # a library

    def test_move_movie_into_mixed_library(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_libraries([
            {"name": "Filmy", "kind": "movie"},
            {"name": "Hlavní", "kind": "mixed"},
        ])
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Matrix", year=1999)
        file_manager.move_to_library(movie, "Hlavní")
        assert file_manager.library_of(movie) == "Hlavní"

    def test_import_into_named_library(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_movie_libraries(["Filmy", "Kids"])
        (tmp_path / "a.mkv").write_bytes(b"x")

        movie = file_manager.import_movie(
            tmp_path / "a.mkv", "Auta", year=2006, tmdb_id=920, library="Kids")

        assert movie.file_path == tmp_path / "pool" / "Kids" / "Auta (2006) [tmdbid-920].mkv"
        assert file_manager.library_of(movie) == "Kids"

    def test_move_to_library_reindexes(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_movie_libraries(["Filmy", "Kids"])
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Auta", year=2006)
        old_path = movie.file_path

        file_manager.move_to_library(movie, "Kids")

        assert file_manager.library_of(movie) == "Kids"
        assert movie.file_path.exists()
        # The movie keeps its identity record; only its media path + library move.
        assert file_manager.index.record_for(old_path) is None
        record = file_manager.index.record_for(movie.file_path)
        assert record is not None
        assert record["library"] == "Kids"
        assert [m["file"] for m in record["media"]] == ["Kids/Auta (2006).mkv"]

    def test_move_to_unknown_library_rejected(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Auta", year=2006)
        with pytest.raises(ValueError):
            file_manager.move_to_library(movie, "Neexistuje")

    def test_load_scans_all_movie_libraries(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_movie_libraries(["Filmy", "Kids"])
        (tmp_path / "a.mkv").write_bytes(b"x")
        (tmp_path / "b.mkv").write_bytes(b"y")
        file_manager.import_movie(tmp_path / "a.mkv", "Matrix", year=1999)
        file_manager.import_movie(tmp_path / "b.mkv", "Auta", year=2006, library="Kids")

        reloaded = FileManager(TagManager())
        reloaded.set_pool_dir(tmp_path / "pool")
        reloaded.load_pool_movies()

        libs = sorted(reloaded.library_of(f) for f in reloaded.filelist)
        assert libs == ["Filmy", "Kids"]

    def test_load_skips_jellyfin_sidecars(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Matrix", year=1999)
        # Jellyfin writes these next to the movie — must not count as movies
        movie.file_path.with_suffix(".nfo").write_text("<movie/>")
        (movie.file_path.parent / "poster.jpg").write_bytes(b"img")

        reloaded = FileManager(TagManager())
        reloaded.set_pool_dir(tmp_path / "pool")
        reloaded.load_pool_movies()

        assert len(reloaded.filelist) == 1
        assert reloaded.filelist[0].file_path.suffix == ".mkv"

    def test_apply_movie_edits_all_at_once(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_movie_libraries(["Filmy", "Kids"])
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Puvodni", year=2000)

        file_manager.apply_movie_edits(
            movie, title="Auta", year=2006, tmdb_id=920, library="Kids",
            date="2026-01-02", attributes={"collection_sort": "01"},
            tags=["Žánr/Animovaný", "Sbírka/Oblíbené"])

        assert movie.file_path == tmp_path / "pool" / "Kids" / "Auta (2006) [tmdbid-920].mkv"
        assert movie.title == "Auta"
        assert file_manager.library_of(movie) == "Kids"
        assert movie.date == "2026-01-02"
        assert movie.attributes == {"collection_sort": "01"}
        assert {t.full_path for t in movie.tags} == {"Žánr/Animovaný", "Sbírka/Oblíbené"}

    def test_import_and_edit_store_csfd_url(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(
            tmp_path / "a.mkv", "Matrix", year=1999, tmdb_id=603,
            csfd_url="https://www.csfd.cz/film/9499/")
        assert movie.csfd_url == "https://www.csfd.cz/film/9499/"

        # persists across reload
        reloaded = FileManager(TagManager())
        reloaded.set_pool_dir(tmp_path / "pool")
        reloaded.load_pool_movies()
        assert reloaded.filelist[0].csfd_url == "https://www.csfd.cz/film/9499/"

        # editable via apply_movie_edits
        file_manager.apply_movie_edits(movie, title="Matrix", year=1999,
                                       csfd_url="https://www.csfd.cz/film/9499-matrix/")
        assert movie.csfd_url == "https://www.csfd.cz/film/9499-matrix/"

    def test_apply_movie_edits_sets_3d_format(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)

        file_manager.apply_movie_edits(
            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="hsbs")

        assert movie.file_path.name == "Avatar (2009) [tmdbid-19995].3D.HSBS.mkv"

    def test_apply_movie_edits_omitted_3d_format_is_preserved(self, file_manager, tmp_path):
        """Editing an unrelated field (e.g. date) must not silently drop the tag."""
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        file_manager.apply_movie_edits(
            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="hsbs")

        file_manager.apply_movie_edits(
            movie, title="Avatar", year=2009, tmdb_id=19995, date="2026-01-01")

        assert movie.file_path.name == "Avatar (2009) [tmdbid-19995].3D.HSBS.mkv"
        assert movie.date == "2026-01-01"

    def test_apply_movie_edits_empty_string_clears_3d_format(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        file_manager.apply_movie_edits(
            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="hsbs")

        file_manager.apply_movie_edits(
            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="")

        assert movie.file_path.name == "Avatar (2009) [tmdbid-19995].mkv"

    def test_apply_movie_edits_rejects_name_clash(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"x")
        (tmp_path / "b.mkv").write_bytes(b"y")
        file_manager.import_movie(tmp_path / "a.mkv", "Solaris", year=1972)
        other = file_manager.import_movie(tmp_path / "b.mkv", "Jiny", year=2002)
        with pytest.raises(FileExistsError):
            file_manager.apply_movie_edits(other, title="Solaris", year=1972)

    def test_rename_to_canonical_preserves_tmdb_id(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "raw.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(
            tmp_path / "raw.mkv", "Matrix", year=1999, tmdb_id=603)

        movie.title = "Matrix Reloaded"  # metadata title changed
        renamed = file_manager.rename_to_canonical(movie)

        assert renamed is not None
        assert movie.file_path.name == "Matrix Reloaded (1999) [tmdbid-603].mkv"

    def test_rename_to_canonical_preserves_3d_format(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "raw.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(
            tmp_path / "raw.mkv", "Avatar", year=2009, tmdb_id=19995)
        file_manager.apply_movie_edits(
            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="fsbs")

        movie.title = "Avatar Retitled"
        file_manager.rename_to_canonical(movie)

        assert movie.file_path.name == "Avatar Retitled (2009) [tmdbid-19995].3D.FSBS.mkv"

    def test_import_movie_rejects_invalid_year(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        with pytest.raises(ValueError):
            file_manager.import_movie(tmp_path / "a.mkv", "Matrix", year="99")

    def test_import_same_title_different_year_coexist(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"a")
        (tmp_path / "b.mkv").write_bytes(b"b")
        first = file_manager.import_movie(tmp_path / "a.mkv", "Solaris", year=1972)
        second = file_manager.import_movie(tmp_path / "b.mkv", "Solaris", year=2002)

        assert first.file_path.name == "Solaris (1972).mkv"
        assert second.file_path.name == "Solaris (2002).mkv"  # no collision/suffix

    def test_rename_to_canonical_from_csfd_year(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "raw.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix")  # plain
        assert movie.file_path.name == "Matrix.mkv"

        movie.meta = {"year": 1999}
        renamed = file_manager.rename_to_canonical(movie)

        assert renamed is not None
        assert movie.file_path.name == "Matrix (1999).mkv"
        assert movie.title == "Matrix"

    def test_rename_to_canonical_skips_without_year(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "raw.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Unknown")

        assert file_manager.rename_to_canonical(movie) is None
        assert movie.file_path.name == "Unknown.mkv"  # untouched

    def test_rename_all_to_canonical_reports(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        for n in ("a.mkv", "b.mkv", "c.mkv"):
            (tmp_path / n).write_bytes(b"x")
        with_year = file_manager.import_movie(tmp_path / "a.mkv", "Matrix")
        with_year.meta = {"year": 1999}
        already = file_manager.import_movie(tmp_path / "b.mkv", "Solaris", year=1972)
        _no_year = file_manager.import_movie(tmp_path / "c.mkv", "Mystery")

        result = file_manager.rename_all_to_canonical(file_manager.filelist)

        assert result["renamed"] == [("Matrix.mkv", "Matrix (1999).mkv")]
        assert result["unchanged"] == 1  # Solaris (1972) already canonical
        assert result["skipped_no_year"] == ["Mystery.mkv"]
        assert already.file_path.name == "Solaris (1972).mkv"

    def test_load_pool_movies_reads_from_index(self, file_manager, tmp_path):
        file_manager.set_pool_dir(tmp_path / "pool")
        source = tmp_path / "raw.mkv"
        source.write_bytes(b"x" * 10)
        file_manager.import_movie(source, "Matrix")

        reloaded = FileManager(TagManager())
        reloaded.set_pool_dir(tmp_path / "pool")
        reloaded.load_pool_movies()

        assert len(reloaded.filelist) == 1
        assert reloaded.filelist[0].title == "Matrix"

    def test_copyasis_folders_default_and_set(self, file_manager, tmp_path):
        assert file_manager.copyasis_folders == ["Seriály"]

        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_copyasis_folders(["Seriály", " Dokumenty ", ""])
        assert file_manager.copyasis_folders == ["Seriály", "Dokumenty"]

    def test_library_settings_stored_in_index_not_global(self, file_manager, tmp_path):
        """tag_schema / copyasis_folders persist in the pool index, not .!gtag."""
        file_manager.set_pool_dir(tmp_path / "pool")
        file_manager.set_copyasis_folders(["Seriály", "Dokumenty"])

        assert "copyasis_folders" not in file_manager.global_config
        # series libraries now persist in the unified "libraries" setting (in the index)
        stored = file_manager.index.get_setting("libraries")
        assert stored is not None
        assert [lib["name"] for lib in stored if lib["kind"] == "series"] == \
            ["Seriály", "Dokumenty"]

        # a fresh manager over the same pool reads the stored settings back
        reloaded = FileManager(TagManager())
        reloaded.set_pool_dir(tmp_path / "pool")
        assert reloaded.copyasis_folders == ["Seriály", "Dokumenty"]

    def test_migrates_legacy_global_settings_into_index(self, file_manager, tmp_path):
        """Old settings left in the global config move into the index on open."""
        file_manager.set_pool_dir(tmp_path / "pool")
        # simulate a pre-migration global config carrying library settings
        file_manager.global_config["copyasis_folders"] = ["Seriály", "Filmy jinak"]
        file_manager.index = None  # force a fresh open + migration

        assert file_manager.copyasis_folders == ["Seriály", "Filmy jinak"]
        assert "copyasis_folders" not in file_manager.global_config
        assert file_manager.index.get_setting("copyasis_folders") == ["Seriály", "Filmy jinak"]


class TestCsfdBridge:
    """ČSFD → TMDb title bridge (resolve_via_csfd, migration wiring)."""

    @pytest.fixture
    def temp_global_config(self, tmp_path, monkeypatch):
        config_path = tmp_path / "test_config.json"
        import src.core.config as config_module
        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
        return config_path

    @pytest.fixture
    def file_manager(self, temp_global_config):
        return FileManager(TagManager())

    def test_resolve_via_csfd_bridges_original_title_to_tmdb(
        self, file_manager, monkeypatch
    ):
        from src.core import csfd, tmdb
        film = csfd.CsfdFilm(
            url="https://www.csfd.cz/film/2294-x/", csfd_id=2294,
            czech_title="Vykoupení z věznice Shawshank",
            original_title="The Shawshank Redemption", year="1994")
        monkeypatch.setattr(csfd, "fetch_film", lambda url, session=None: film)
        monkeypatch.setattr(tmdb, "api_available", lambda: True)

        captured: dict = {}

        def fake_search(query, year=None, limit=5):
            captured["query"], captured["year"] = query, year
            return [tmdb.TmdbResult(278, "Vykoupení z věznice Shawshank", "1994", "movie")]

        monkeypatch.setattr(tmdb, "search_movie", fake_search)

        result = file_manager.resolve_via_csfd(
            csfd_url="https://www.csfd.cz/film/2294-x/")

        assert captured == {"query": "The Shawshank Redemption", "year": "1994"}
        assert result["tmdb"].tmdb_id == 278
        assert result["film"] is film

    def test_resolve_via_csfd_swallows_scrape_failure(self, file_manager, monkeypatch):
        from src.core import csfd

        def boom(url, session=None):
            raise csfd.CsfdError("anti-bot")

        monkeypatch.setattr(csfd, "fetch_film", boom)
        result = file_manager.resolve_via_csfd(csfd_url="https://www.csfd.cz/film/1/")
        assert result == {"csfd_url": "https://www.csfd.cz/film/1/",
                          "film": None, "tmdb": None}

    def test_match_pool_uses_csfd_url_for_the_search(
        self, file_manager, tmp_path, monkeypatch
    ):
        from src.core import csfd, tmdb
        file_manager.set_pool_dir(tmp_path / "pool")
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(
            tmp_path / "a.mkv", "Vykoupení z věznice Shawshank", year=1994,
            csfd_url="https://www.csfd.cz/film/2294-x/")

        film = csfd.CsfdFilm(
            url=movie.csfd_url, czech_title="Vykoupení z věznice Shawshank",
            original_title="The Shawshank Redemption", year="1994")
        monkeypatch.setattr(csfd, "fetch_film", lambda url, session=None: film)
        monkeypatch.setattr(tmdb, "api_available", lambda: True)

        seen: list = []

        def fake_search(query, year=None, limit=5):
            seen.append((query, year))
            return [tmdb.TmdbResult(278, "The Shawshank Redemption", "1994", "movie")]

        monkeypatch.setattr(tmdb, "search_movie", fake_search)

        proposals = file_manager.match_pool_to_tmdb([movie])

        assert seen == [("The Shawshank Redemption", "1994")]
        assert len(proposals) == 1
        assert proposals[0].status == "auto"
        assert proposals[0].chosen.tmdb_id == 278
        assert "ČSFD" in proposals[0].note


class TestSubtitleAttachment:
    """External subtitle sidecars for movies (attach / list / remove / rename-along)."""

    @pytest.fixture
    def temp_global_config(self, tmp_path, monkeypatch):
        config_path = tmp_path / "test_config.json"
        import src.core.config as config_module
        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
        return config_path

    @pytest.fixture
    def file_manager(self, temp_global_config, tmp_path):
        fm = FileManager(TagManager())
        fm.set_pool_dir(tmp_path / "pool")
        return fm

    def test_attach_subtitle_copies_next_to_movie(self, file_manager, tmp_path):
        (tmp_path / "raw.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
        srt = tmp_path / "downloaded.srt"
        srt.write_bytes(b"1\n00:00:01,000 --> 00:00:02,000\nAhoj\n")

        target = file_manager.attach_subtitle(movie, srt, language="cs")

        assert target == movie.file_path.with_name("Matrix (1999).cs.srt")
        assert target.exists()
        assert srt.exists()  # copied, not moved
        assert [s.path for s in file_manager.list_subtitles(movie)] == [target]

    def test_remove_subtitle_deletes_file(self, file_manager, tmp_path):
        (tmp_path / "raw.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
        srt = tmp_path / "s.srt"
        srt.write_bytes(b"x")
        target = file_manager.attach_subtitle(movie, srt, language="cs")

        file_manager.remove_subtitle(target)

        assert not target.exists()
        assert file_manager.list_subtitles(movie) == []

    def test_rename_movie_carries_subtitle_along(self, file_manager, tmp_path):
        (tmp_path / "raw.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
        srt = tmp_path / "s.srt"
        srt.write_bytes(b"x")
        old_sub = file_manager.attach_subtitle(movie, srt, language="cs")

        file_manager.rename_movie(movie, "Matrix Reloaded")

        assert not old_sub.exists()
        new_sub = movie.file_path.with_name("Matrix Reloaded.cs.srt")
        assert new_sub.exists()

    def test_apply_movie_edits_carries_subtitle_along(self, file_manager, tmp_path):
        (tmp_path / "raw.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
        srt = tmp_path / "s.srt"
        srt.write_bytes(b"x")
        file_manager.attach_subtitle(movie, srt, language="cs", flag="forced")

        file_manager.apply_movie_edits(movie, title="Matrix", year=1999, tmdb_id=603)

        assert movie.file_path.name == "Matrix (1999) [tmdbid-603].mkv"
        assert movie.file_path.with_name(
            "Matrix (1999) [tmdbid-603].cs.forced.srt").exists()

    def test_move_to_library_carries_subtitle_along(self, file_manager, tmp_path):
        file_manager.set_movie_libraries(["Filmy", "Kids"])
        (tmp_path / "raw.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
        srt = tmp_path / "s.srt"
        srt.write_bytes(b"x")
        file_manager.attach_subtitle(movie, srt, language="cs")

        file_manager.move_to_library(movie, "Kids")

        assert movie.file_path == tmp_path / "pool" / "Kids" / "Matrix (1999).mkv"
        assert (tmp_path / "pool" / "Kids" / "Matrix (1999).cs.srt").exists()
        assert not (tmp_path / "pool" / "Filmy" / "Matrix (1999).cs.srt").exists()


class TestMinidlnaScope:
    """Which libraries feed miniDLNA generation (minidlna_libraries / scope)."""

    @pytest.fixture
    def temp_global_config(self, tmp_path, monkeypatch):
        config_path = tmp_path / "test_config.json"
        import src.core.config as config_module
        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
        return config_path

    @pytest.fixture
    def file_manager(self, temp_global_config, tmp_path):
        fm = FileManager(TagManager())
        fm.set_pool_dir(tmp_path / "pool")
        return fm

    def test_default_is_none_meaning_all(self, file_manager):
        assert file_manager.minidlna_libraries is None

    def test_default_scope_is_the_whole_pool(self, file_manager, tmp_path):
        file_manager.set_libraries([
            {"name": "Filmy", "kind": "movie"}, {"name": "Seriály", "kind": "series"}])
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Matrix", year=1999)

        movies, mirrors, mixed_series = file_manager.minidlna_scope()

        assert movies == [movie]
        assert mirrors == ["Seriály"]
        assert mixed_series == []

    def test_scope_filters_to_selected_libraries(self, file_manager, tmp_path):
        file_manager.set_libraries([
            {"name": "Filmy", "kind": "movie"}, {"name": "Kids", "kind": "movie"},
            {"name": "Seriály", "kind": "series"}, {"name": "Dokumenty", "kind": "series"}])
        (tmp_path / "a.mkv").write_bytes(b"x")
        (tmp_path / "b.mkv").write_bytes(b"x")
        in_scope = file_manager.import_movie(
            tmp_path / "a.mkv", "Matrix", year=1999, library="Filmy")
        file_manager.import_movie(tmp_path / "b.mkv", "Kids Movie", year=2005, library="Kids")

        file_manager.set_minidlna_libraries(["Filmy", "Seriály"])
        movies, mirrors, mixed_series = file_manager.minidlna_scope()

        assert movies == [in_scope]
        assert mirrors == ["Seriály"]
        assert mixed_series == []

    def test_homevideo_libraries_are_mirrored_like_series(self, file_manager):
        file_manager.set_libraries([
            {"name": "Seriály", "kind": "series"}, {"name": "Dokumenty", "kind": "homevideo"}])

        assert file_manager.mirror_as_is_libraries == ["Seriály", "Dokumenty"]
        _, mirrors, _ = file_manager.minidlna_scope()
        assert mirrors == ["Seriály", "Dokumenty"]

    def test_homevideo_library_excluded_when_not_selected(self, file_manager):
        file_manager.set_libraries([
            {"name": "Seriály", "kind": "series"}, {"name": "Dokumenty", "kind": "homevideo"}])
        file_manager.set_minidlna_libraries(["Seriály"])

        _, mirrors, _ = file_manager.minidlna_scope()
        assert mirrors == ["Seriály"]

    def test_copyasis_folders_stays_series_only(self, file_manager):
        """The library-organizer "copy-as-is" concept doesn't widen to homevideo."""
        file_manager.set_libraries([
            {"name": "Seriály", "kind": "series"}, {"name": "Dokumenty", "kind": "homevideo"}])
        assert file_manager.copyasis_folders == ["Seriály"]

    def test_set_none_resets_to_all(self, file_manager):
        file_manager.set_minidlna_libraries(["Filmy"])
        file_manager.set_minidlna_libraries(None)
        assert file_manager.minidlna_libraries is None

    def test_drops_unknown_library_names_on_read(self, file_manager):
        file_manager.set_libraries([{"name": "Filmy", "kind": "movie"}])
        file_manager.set_minidlna_libraries(["Filmy", "Zaniklá knihovna"])
        assert file_manager.minidlna_libraries == ["Filmy"]

    def test_persists_across_reload(self, file_manager, tmp_path):
        file_manager.set_libraries([{"name": "Filmy", "kind": "movie"}])
        file_manager.set_minidlna_libraries(["Filmy"])

        reloaded = FileManager(TagManager())
        reloaded.set_pool_dir(tmp_path / "pool")
        assert reloaded.minidlna_libraries == ["Filmy"]

    def test_mixed_library_series_returned_separately_from_movies(
        self, file_manager, tmp_path
    ):
        file_manager.set_libraries([{"name": "Hlavní", "kind": "mixed"}])
        (tmp_path / "movie.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(
            tmp_path / "movie.mkv", "Matrix", year=1999, library="Hlavní")
        (tmp_path / "bb.S01E01.mkv").write_bytes(b"x")
        file_manager.import_episodes(
            [tmp_path / "bb.S01E01.mkv"], "Breaking Bad", year=2008, tmdb_id=1396,
            library="Hlavní")

        movies, mirrors, mixed_series = file_manager.minidlna_scope()

        assert movies == [movie]
        assert mirrors == []
        assert len(mixed_series) == 1
        assert mixed_series[0].title == "Breaking Bad"
        assert mixed_series[0].library == "Hlavní"

    def test_mixed_library_series_excluded_when_library_not_selected(
        self, file_manager, tmp_path
    ):
        file_manager.set_libraries([
            {"name": "Hlavní", "kind": "mixed"}, {"name": "Filmy", "kind": "movie"}])
        (tmp_path / "bb.S01E01.mkv").write_bytes(b"x")
        file_manager.import_episodes(
            [tmp_path / "bb.S01E01.mkv"], "Breaking Bad", year=2008, library="Hlavní")

        file_manager.set_minidlna_libraries(["Filmy"])
        _, _, mixed_series = file_manager.minidlna_scope()

        assert mixed_series == []


class TestMinidlnaPruneTargets:
    """What to remove from a previous generation's output once deselected."""

    @pytest.fixture
    def temp_global_config(self, tmp_path, monkeypatch):
        config_path = tmp_path / "test_config.json"
        import src.core.config as config_module
        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
        return config_path

    @pytest.fixture
    def file_manager(self, temp_global_config, tmp_path):
        fm = FileManager(TagManager())
        fm.set_pool_dir(tmp_path / "pool")
        return fm

    def test_deselected_series_library_is_stale(self, file_manager):
        file_manager.set_libraries([
            {"name": "Anime", "kind": "series"}, {"name": "Dokumenty", "kind": "homevideo"}])
        # both deselected — neither is "Seriály" so both go whole-folder
        stale, valid = file_manager.minidlna_prune_targets(
            mirror_libs=[], mixed_series=[], mixed_series_bucket="Seriály")
        assert set(stale) == {"Anime", "Dokumenty"}
        assert valid == set()

    def test_selected_library_is_not_stale(self, file_manager):
        file_manager.set_libraries([{"name": "Anime", "kind": "series"}])
        stale, _ = file_manager.minidlna_prune_targets(
            mirror_libs=["Anime"], mixed_series=[], mixed_series_bucket="Seriály")
        assert stale == []

    def test_bucket_named_library_never_whole_folder_removed(self, file_manager):
        """A real 'Seriály' library, even deselected, is reconciled per-child —
        never nuked via the whole-folder path (that would also erase valid
        mixed-library series sharing the same bucket)."""
        file_manager.set_libraries([{"name": "Seriály", "kind": "series"}])
        stale, valid = file_manager.minidlna_prune_targets(
            mirror_libs=[], mixed_series=[], mixed_series_bucket="Seriály")
        assert "Seriály" not in stale
        assert valid == set()

    def test_bucket_named_library_selected_contributes_its_children(
        self, file_manager, tmp_path
    ):
        file_manager.set_libraries([{"name": "Seriály", "kind": "series"}])
        (tmp_path / "pool" / "Seriály" / "Show A").mkdir(parents=True)
        (tmp_path / "pool" / "Seriály" / "Show B").mkdir(parents=True)

        _, valid = file_manager.minidlna_prune_targets(
            mirror_libs=["Seriály"], mixed_series=[], mixed_series_bucket="Seriály")

        assert valid == {"Show A", "Show B"}

    def test_mixed_series_folder_names_are_valid(self, file_manager, tmp_path):
        file_manager.set_libraries([{"name": "Hlavní", "kind": "mixed"}])
        (tmp_path / "bb.S01E01.mkv").write_bytes(b"x")
        file_manager.import_episodes(
            [tmp_path / "bb.S01E01.mkv"], "Breaking Bad", year=2008,
            tmdb_id=1396, library="Hlavní")
        _, _, mixed_series = file_manager.minidlna_scope()

        _, valid = file_manager.minidlna_prune_targets(
            mirror_libs=[], mixed_series=mixed_series, mixed_series_bucket="Seriály")

        assert valid == {"Breaking Bad (2008) [tmdbid-1396]"}

    def test_deselected_mixed_series_drops_out_of_valid(self, file_manager, tmp_path):
        """Simulates re-running after the mixed library is unchecked: the
        previously-mirrored series' folder name is no longer valid."""
        file_manager.set_libraries([{"name": "Hlavní", "kind": "mixed"}])
        (tmp_path / "bb.S01E01.mkv").write_bytes(b"x")
        file_manager.import_episodes(
            [tmp_path / "bb.S01E01.mkv"], "Breaking Bad", year=2008,
            tmdb_id=1396, library="Hlavní")

        file_manager.set_minidlna_libraries([])  # deselect everything
        _, _, mixed_series = file_manager.minidlna_scope()
        _, valid = file_manager.minidlna_prune_targets(
            mirror_libs=[], mixed_series=mixed_series, mixed_series_bucket="Seriály")

        assert mixed_series == []
        assert valid == set()


class TestMovieVersions:
    """Multiple versions of one movie (2D+3D, 4K+1080p, …) — flat until a
    second file shows up, then grouped into a per-movie folder."""

    @pytest.fixture
    def temp_global_config(self, tmp_path, monkeypatch):
        config_path = tmp_path / "test_config.json"
        import src.core.config as config_module
        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
        return config_path

    @pytest.fixture
    def file_manager(self, temp_global_config, tmp_path):
        fm = FileManager(TagManager())
        fm.set_pool_dir(tmp_path / "pool")
        return fm

    def test_flat_movie_is_not_a_group_member(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        assert file_manager.is_movie_group_member(movie) is False
        assert file_manager.list_movie_versions(movie) == [movie]
        assert file_manager.visible_movies() == [movie]

    def test_add_version_promotes_flat_movie_to_a_folder(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")

        v2 = file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D HSBS")

        base = tmp_path / "pool" / "Filmy" / "Avatar (2009) [tmdbid-19995]"
        assert movie.file_path == base / "Avatar (2009) [tmdbid-19995] - Výchozí.mkv"
        assert v2.file_path == base / "Avatar (2009) [tmdbid-19995] - 3D HSBS.mkv"
        assert file_manager.is_movie_group_member(movie)
        assert file_manager.is_movie_group_member(v2)
        assert (tmp_path / "b.mkv").exists()  # copied, not moved (move=False default)

    def test_add_version_carries_subtitle_along_on_promotion(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        srt = tmp_path / "s.srt"
        srt.write_bytes(b"x")
        file_manager.attach_subtitle(movie, srt, language="cs")
        (tmp_path / "b.mkv").write_bytes(b"3d")

        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D HSBS")

        base = tmp_path / "pool" / "Filmy" / "Avatar (2009) [tmdbid-19995]"
        assert (base / "Avatar (2009) [tmdbid-19995] - Výchozí.cs.srt").exists()

    def test_second_version_added_to_existing_group(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")
        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D HSBS")
        (tmp_path / "c.mkv").write_bytes(b"4k")

        v3 = file_manager.add_movie_version(movie, tmp_path / "c.mkv", "4K")

        assert len(file_manager.list_movie_versions(movie)) == 3
        assert v3.file_path.name == "Avatar (2009) [tmdbid-19995] - 4K.mkv"

    def test_add_version_rejects_empty_label(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        with pytest.raises(ValueError):
            file_manager.add_movie_version(movie, tmp_path / "a.mkv", "  ")

    def test_add_version_rejects_duplicate_label(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")
        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
        (tmp_path / "c.mkv").write_bytes(b"3d-2")
        with pytest.raises(FileExistsError):
            file_manager.add_movie_version(movie, tmp_path / "c.mkv", "3D")

    def test_visible_movies_shows_only_the_primary_version(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        movie.add_tag("Žánr/Sci-Fi")
        movie.csfd_url = "https://www.csfd.cz/film/avatar/"
        movie.save_metadata()
        (tmp_path / "b.mkv").write_bytes(b"3d")
        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D HSBS")

        visible = file_manager.visible_movies()

        assert len(visible) == 1
        assert visible[0].file_path == movie.file_path
        assert visible[0].title == "Avatar"
        assert visible[0].csfd_url == "https://www.csfd.cz/film/avatar/"
        assert {t.full_path for t in visible[0].tags} == {"Žánr/Sci-Fi"}

    def test_remove_version_keeps_group_when_more_than_one_remains(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")
        v2 = file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
        (tmp_path / "c.mkv").write_bytes(b"4k")
        v3 = file_manager.add_movie_version(movie, tmp_path / "c.mkv", "4K")

        file_manager.remove_movie_version(v3)

        assert not v3.file_path.exists()
        assert file_manager.is_movie_group_member(movie)
        assert file_manager.is_movie_group_member(v2)
        assert len(file_manager.list_movie_versions(movie)) == 2

    def test_remove_last_extra_version_demotes_to_flat(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")
        v2 = file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")

        file_manager.remove_movie_version(v2)

        assert not file_manager.is_movie_group_member(movie)
        assert movie.file_path == tmp_path / "pool" / "Filmy" / "Avatar (2009) [tmdbid-19995].mkv"
        assert movie.file_path.exists()
        assert not (tmp_path / "pool" / "Filmy" / "Avatar (2009) [tmdbid-19995]").exists()

    def test_removing_primary_migrates_metadata_to_survivor(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        movie.add_tag("Žánr/Sci-Fi")
        movie.csfd_url = "https://www.csfd.cz/film/avatar/"
        movie.attributes = {"collection_sort": "01"}
        movie.save_metadata()
        (tmp_path / "b.mkv").write_bytes(b"3d")
        v2 = file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")

        file_manager.remove_movie_version(movie)  # remove the primary

        assert v2.title == "Avatar"
        assert v2.csfd_url == "https://www.csfd.cz/film/avatar/"
        assert v2.attributes == {"collection_sort": "01"}
        assert {t.full_path for t in v2.tags} == {"Žánr/Sci-Fi"}
        assert not file_manager.is_movie_group_member(v2)  # demoted, only one left

    def test_remove_version_rejects_ungrouped_movie(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"x")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        with pytest.raises(ValueError):
            file_manager.remove_movie_version(movie)

    def test_rename_movie_refuses_grouped_movie(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")
        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")

        with pytest.raises(ValueError):
            file_manager.rename_movie(movie, "Avatar Reloaded")

    def test_move_to_library_refuses_grouped_movie(self, file_manager, tmp_path):
        file_manager.set_movie_libraries(["Filmy", "Kids"])
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")
        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")

        with pytest.raises(ValueError):
            file_manager.move_to_library(movie, "Kids")

    def test_apply_movie_edits_refuses_rename_of_grouped_movie(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")
        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")

        with pytest.raises(ValueError):
            file_manager.apply_movie_edits(movie, title="Avatar Reloaded", year=2009, tmdb_id=19995)

    def test_apply_movie_edits_allows_metadata_only_edit_of_grouped_movie(
        self, file_manager, tmp_path
    ):
        """Same title/year/tmdb_id → no path change → date/tags/etc still work."""
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")
        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")

        file_manager.apply_movie_edits(
            movie, title="Avatar", year=2009, tmdb_id=19995, date="2026-01-01")

        assert movie.date == "2026-01-01"
        assert file_manager.is_movie_group_member(movie)

    def test_rename_to_canonical_skips_grouped_movie(self, file_manager, tmp_path):
        (tmp_path / "a.mkv").write_bytes(b"2d")
        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
        (tmp_path / "b.mkv").write_bytes(b"3d")
        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")

        movie.title = "Avatar Retitled"
        assert file_manager.rename_to_canonical(movie) is None
        assert movie.title == "Avatar Retitled"  # metadata field unaffected
        assert file_manager.is_movie_group_member(movie)  # file untouched