from decimal import Decimal
import logging

from models import EngineFixture, Flickr


class Engine:
    """Render a lightshow."""

    def __init__(self, flickr: Flickr, apis: dict[str, str]) -> None:
        self.time: Decimal = Decimal.from_float(0)
        self.fixtures: dict[str, EngineFixture] = {
            f.id: EngineFixture(f) for s in flickr.spaces for f in s.fixtures
        }
        self.flickr = flickr
        self.apis = apis

        # Validate fixture APIs
        for id, f in self.fixtures.items():
            if f.fixture.api not in self.apis.keys():
                logging.warning(
                    f"Fixture API unknown [{f.fixture.api}]. Fixture will be removed. Fixture ID [{f.fixture.id}]. Known APIs [{', '.join([a for a in self.apis.keys()])}]."
                )
                del self.fixtures[id]

    def next(self, step_size: Decimal):
        """Calculate light values for next step in time. Step size in seconds."""
        prev_time = self.time
        self.time += step_size

        for s in self.flickr.sequences:
            for t in s.tracks:
                # TODO: Calculate new state
                pass

    def propagate(self):
        """Forward new fixture states to APIs."""
        for f in self.fixtures.values():
            api = self.apis[f.fixture.api]
            # TODO: Pass update to API