from ovos_config import Configuration
from ovos_utils import classproperty
from ovos_utils.process_utils import RuntimeRequirements


class VADEngine:
    def __init__(self, config=None, sample_rate=None):
        self.config_core = Configuration()
        self.config = config or {}
        self.sample_rate = sample_rate or \
                           self.config_core.get("listener", {}).get("sample_rate", 16000)

    @classproperty
    def runtime_requirements(self):
        """ skill developers should override this if they do not require connectivity
         some examples:
         IOT plugin that controls devices via LAN could return:
            scans_on_init = True
            RuntimeRequirements(internet_before_load=False,
                                 network_before_load=scans_on_init,
                                 requires_internet=False,
                                 requires_network=True,
                                 no_internet_fallback=True,
                                 no_network_fallback=False)
         online search plugin with a local cache:
            has_cache = False
            RuntimeRequirements(internet_before_load=not has_cache,
                                 network_before_load=not has_cache,
                                 requires_internet=True,
                                 requires_network=True,
                                 no_internet_fallback=True,
                                 no_network_fallback=True)
         a fully offline plugin:
            RuntimeRequirements(internet_before_load=False,
                                 network_before_load=False,
                                 requires_internet=False,
                                 requires_network=False,
                                 no_internet_fallback=True,
                                 no_network_fallback=True)
        """
        return RuntimeRequirements(internet_before_load=False,
                                   network_before_load=False,
                                   requires_internet=False,
                                   requires_network=False,
                                   no_internet_fallback=True,
                                   no_network_fallback=True)

    def is_silence(self, chunk):
        # return True or False
        return False
