"""Picture target base data model."""

from dataclasses import dataclass
from datetime import datetime
from typing import Optional


@dataclass
class PictureTarget:
    """Base class for picture targets."""

    id: str
    name: str
    target_type: str  # "wled", "key_colors", ...
    created_at: datetime
    updated_at: datetime
    description: Optional[str] = None

    def register_with_manager(self, manager) -> None:
        """Register this target with the processor manager. Subclasses override."""
        pass

    def sync_with_manager(self, manager, *, settings_changed: bool, source_changed: bool, device_changed: bool) -> None:
        """Push changed fields to a running processor. Subclasses override."""
        pass

    def update_fields(self, *, name=None, device_id=None, picture_source_id=None,
                      settings=None, key_colors_settings=None, description=None) -> None:
        """Apply mutable field updates. Base handles common fields; subclasses handle type-specific ones."""
        if name is not None:
            self.name = name
        if description is not None:
            self.description = description

    @property
    def has_picture_source(self) -> bool:
        """Whether this target type uses a picture source."""
        return False

    def to_dict(self) -> dict:
        """Convert to dictionary."""
        return {
            "id": self.id,
            "name": self.name,
            "target_type": self.target_type,
            "description": self.description,
            "created_at": self.created_at.isoformat(),
            "updated_at": self.updated_at.isoformat(),
        }

    @classmethod
    def from_dict(cls, data: dict) -> "PictureTarget":
        """Create from dictionary, dispatching to the correct subclass."""
        target_type = data.get("target_type", "wled")
        # "wled" and "led" both map to WledPictureTarget (backward compat)
        if target_type in ("wled", "led"):
            from wled_controller.storage.wled_picture_target import WledPictureTarget
            return WledPictureTarget.from_dict(data)
        if target_type == "key_colors":
            from wled_controller.storage.key_colors_picture_target import KeyColorsPictureTarget
            return KeyColorsPictureTarget.from_dict(data)
        raise ValueError(f"Unknown target type: {target_type}")