"""
SIP SIMPLE settings.

Definition of general (non-account related) settings.
"""

from sipsimple import __version__
from sipsimple.configuration import CorrelatedSetting, RuntimeSetting, Setting, SettingsGroup, SettingsObject
from sipsimple.configuration.datatypes import NonNegativeInteger, PJSIPLogLevel
from sipsimple.configuration.datatypes import AudioCodecList, SampleRate, VideoCodecList
from sipsimple.configuration.datatypes import Port, PortRange, SIPTransportList
from sipsimple.configuration.datatypes import Path
from sipsimple.configuration.datatypes import H264Profile, VideoResolution

__all__ = ['SIPSimpleSettings']



class EchoCancellerSettings(SettingsGroup):
    enabled = Setting(type=bool, default=True)
    tail_length = Setting(type=NonNegativeInteger, default=2)


class AudioSettings(SettingsGroup):
    alert_device = Setting(type=str, default='system_default', nillable=True)
    input_device = Setting(type=str, default='system_default', nillable=True)
    output_device = Setting(type=str, default='system_default', nillable=True)
    sample_rate = Setting(type=SampleRate, default=32000)
    muted = RuntimeSetting(type=bool, default=False)
    silent = Setting(type=bool, default=False)
    echo_canceller = EchoCancellerSettings


class H264Settings(SettingsGroup):
    profile = Setting(type=H264Profile, default='baseline')
    level = Setting(type=str, default='3.1')


class VideoSettings(SettingsGroup):
    device = Setting(type=str, default='system_default', nillable=True)
    resolution = Setting(type=VideoResolution, default=VideoResolution('1280x720'))
    framerate = Setting(type=int, default=25)
    max_bitrate = Setting(type=float, default=None, nillable=True)
    muted = RuntimeSetting(type=bool, default=False)
    h264 = H264Settings


class ChatSettings(SettingsGroup):
    pass


class ScreenSharingSettings(SettingsGroup):
    pass


class FileTransferSettings(SettingsGroup):
    directory = Setting(type=Path, default=Path('~/Downloads'))


class LogsSettings(SettingsGroup):
    trace_msrp = Setting(type=bool, default=False)
    trace_sip = Setting(type=bool, default=False)
    trace_pjsip = Setting(type=bool, default=False)
    pjsip_level = Setting(type=PJSIPLogLevel, default=5)

try:
    from sipsimple.configuration._codecs import RTPSettings
except ImportError:
    class RTPSettings(SettingsGroup):
        port_range = Setting(type=PortRange, default=PortRange(50000, 50500))
        timeout = Setting(type=NonNegativeInteger, default=30)
        audio_codec_list = Setting(type=AudioCodecList, default=AudioCodecList(('opus', 'G722', 'PCMU', 'PCMA')))
        # VP9 first so it wins SDP codec negotiation with peers that
        # support it. H264 is moved last because the Sylk-flavoured ZRTP
        # FrameEncryptor cannot safely E2E-encrypt H264 (STAP-A multi-NAL
        # aggregation breaks the fixed-prefix scheme) and the install is
        # skipped on both sides under H264 — see sip-session3's
        # _install_aead_keys_on_stream and sylk-mobile's CallZrtp.js
        # _shouldSkipVideoZrtpForCodec. With VP9 (or VP8) as the
        # negotiated codec, video is fully end-to-end AES-128-GCM.
        video_codec_list = Setting(type=VideoCodecList, default=VideoCodecList(('VP9', 'VP8', 'H264')))


def sip_port_validator(port, sibling_port):
    if port == sibling_port != 0:
        raise ValueError("the TCP and TLS ports must be different")

class SIPSettings(SettingsGroup):
    invite_timeout = Setting(type=NonNegativeInteger, default=90, nillable=True)
    udp_port = Setting(type=Port, default=0)
    tcp_port = CorrelatedSetting(type=Port, sibling='tls_port', validator=sip_port_validator, default=0)
    tls_port = CorrelatedSetting(type=Port, sibling='tcp_port', validator=sip_port_validator, default=0)
    transport_list = Setting(type=SIPTransportList, default=SIPTransportList(('tls', 'tcp', 'udp')))


class TLSSettings(SettingsGroup):
    ca_list = Setting(type=Path, default=None, nillable=True)
    certificate = Setting(type=Path, default=None, nillable=True)
    verify_server = Setting(type=bool, default=False)

class SIPSimpleSettings(SettingsObject):
    __id__ = 'SIPSimpleSettings'

    default_account = Setting(type=str, default='bonjour@local', nillable=True)
    user_agent = Setting(type=str, default='sipsimple %s' % __version__)
    instance_id = Setting(type=str, default='')

    audio = AudioSettings
    video = VideoSettings
    chat = ChatSettings
    screen_sharing = ScreenSharingSettings
    file_transfer = FileTransferSettings
    logs = LogsSettings
    rtp = RTPSettings
    sip = SIPSettings
    tls = TLSSettings