from threading import Event
from typing import TypeVar, Union

DOWNLOAD_CANCELLED = Event()
DOWNLOAD_LICENCE_ONLY = Event()

DRM_SORT_MAP = ["ClearKey", "Widevine"]
LANGUAGE_MAX_DISTANCE = 5  # this is max to be considered "same", e.g., en, en-US, en-AU
LANGUAGE_EXACT_DISTANCE = 0  # exact match only, no variants
VIDEO_CODEC_MAP = {"AVC": "H.264", "HEVC": "H.265"}
DYNAMIC_RANGE_MAP = {
    "HDR10": "HDR",
    "HDR10+": "HDR10P",
    "Dolby Vision": "DV",
    "HDR10 / HDR10+": "HDR10P",
    "HDR10 / HDR10": "HDR",
}
AUDIO_CODEC_MAP = {"E-AC-3": "DDP", "AC-3": "DD"}

context_settings = dict(
    help_option_names=["-?", "-h", "--help"],  # default only has --help
    max_content_width=116,  # max PEP8 line-width, -4 to adjust for initial indent
)

# For use in signatures of functions which take one specific type of track at a time
# (it can't be a list that contains e.g. both Video and Audio objects)
TrackT = TypeVar("TrackT", bound="Track")  # noqa: F821

# For general use in lists that can contain mixed types of tracks.
# list[Track] won't work because list is invariant.
# TODO: Add Chapter?
AnyTrack = Union["Video", "Audio", "Subtitle"]  # noqa: F821