"""What the panel sees as a "display": one receiver, whatever protocol it speaks."""
from __future__ import annotations

import time
from dataclasses import dataclass, field

CAST, AIRPLAY, DLNA = "cast", "airplay", "dlna"

KIND_LABEL = {CAST: "Google Cast", AIRPLAY: "AirPlay", DLNA: "DLNA"}


@dataclass
class Device:
    id: str
    kind: str
    name: str
    host: str
    port: int
    model: str = ""
    manufacturer: str = ""
    # Protocol-specific handles: cast_info for Cast, control URLs for DLNA,
    # the mDNS TXT record for AirPlay.
    extra: dict = field(default_factory=dict)
    seen: float = field(default_factory=time.time)
    # Live status, filled in by the backend that owns the device.
    status: str = ""          # "" | idle | busy | casting | connecting | error
    app: str = ""             # what it is showing now ("Netflix", "Backdrop", …)
    volume: float = -1.0      # -1 when unknown
    muted: bool = False
    error: str = ""

    @property
    def video(self) -> bool:
        """Can it show a picture? Speaker groups and speakers cannot."""
        if self.kind == CAST:
            return self.extra.get("cast_type") in (None, "cast", "group") and not self.audio_only
        return True

    @property
    def audio_only(self) -> bool:
        if self.kind == CAST:
            return self.extra.get("cast_type") in ("audio", "group")
        return False

    def to_json(self) -> dict:
        return {
            "id": self.id,
            "kind": self.kind,
            "kindLabel": KIND_LABEL.get(self.kind, self.kind),
            "name": self.name,
            "model": self.model,
            "host": self.host,
            "port": self.port,
            "status": self.status,
            "app": self.app,
            "volume": self.volume,
            "muted": self.muted,
            "audioOnly": self.audio_only,
            "error": self.error,
        }