from turtle import Turtle
from typing import Optional, Collection, Any
from controls.device import SynchronyDevice
from controls.device import TraitDescriptor
from controls.device import ActionDescriptor
import inspect

class TurtleDevice(SynchronyDevice):
    def open(self):
        self.turtle = Turtle()
        super().open()

    def close(self):
        self.turtle.clear()
        super().close()

    def trait_descriptors(self) -> Collection[TraitDescriptor]:
        return self.get_descriptors()["traits"]

    def action_descriptors(self) -> Collection[ActionDescriptor]:
        return self.get_descriptors()["actions"]

    def __getitem__(self, trait_name: str) -> Optional[Any]:
        """Return logical state of trait `trait_name`."""
        pass

    def read(self, trait_name: str) -> Any:
        pass

    def write(self, trait_name: str, value: Any) -> bool:
        self.turtle.write()

    def execute(self, action_name: str, *args, **kwargs):
        """Execute action `action_name`, using `args` and `kwargs` as action argument."""
        pass

    def invalidate(self, trait_name: str):
        pass

    def get_descriptors(self):
        descriptors = dict(actions=dict(), traits=dict())
        for k, v in self.turtle.__dict__.items():
            if not k.startswith("_"):
                descriptors["traits"][k] = TraitDescriptor(k,
                                                           inspect.getdoc(v),
                                                           readable=True,
                                                           writable=False)

        for m_name, member in inspect.getmembers(Turtle):
            if m_name.startswith("_"): continue
            if m_name.lower() != m_name: continue
            doc = inspect.getdoc(member)
            if doc is None: continue

            if not inspect.isfunction(member):
                descriptors["traits"][m_name] = TraitDescriptor(m_name,
                                                                doc,
                                                                readable=True,
                                                                writable=False)
            else:
                sig = inspect.signature(member)
                params_dict = dict(sig.parameters)
                descriptors["actions"][m_name] = ActionDescriptor(m_name,
                                                                  arguments=params_dict,
                                                                  info=doc)
        return descriptors