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#
#   http://www.apache.org/licenses/LICENSE-2.0
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from typing import Any

from watchdog.events import FileDeletedEvent, FileMovedEvent

from superset.extensions.local_extensions_watcher import _get_file_handler_class


def _noop_schedule_reload(_path: str) -> None:
    """Stand in for a real debounce timer in unit tests."""


def make_handler() -> Any:
    handler_class = _get_file_handler_class()
    handler = handler_class()
    # Avoid spinning up real debounce timers in unit tests.
    handler._schedule_reload = _noop_schedule_reload
    return handler


def test_delete_evicts_hash_entry() -> None:
    handler = make_handler()
    handler._file_hashes["/ext/dist/old-chunk.abc123.js"] = "digest"

    handler.on_any_event(FileDeletedEvent("/ext/dist/old-chunk.abc123.js"))

    assert "/ext/dist/old-chunk.abc123.js" not in handler._file_hashes


def test_delete_of_untracked_path_is_a_noop() -> None:
    handler = make_handler()

    handler.on_any_event(FileDeletedEvent("/ext/dist/never-seen.js"))

    assert handler._file_hashes == {}


def test_move_out_of_dist_evicts_source_hash_entry() -> None:
    handler = make_handler()
    handler._file_hashes["/ext/dist/chunk.js"] = "digest"

    handler.on_any_event(FileMovedEvent("/ext/dist/chunk.js", "/ext/tmp/chunk.js"))

    assert "/ext/dist/chunk.js" not in handler._file_hashes