"""LED output target — sends color strip sources to an LED device."""

from dataclasses import dataclass
from datetime import datetime, timezone
from typing import List, Optional

from wled_controller.storage.output_target import OutputTarget

DEFAULT_STATE_CHECK_INTERVAL = 30  # seconds


@dataclass
class WledOutputTarget(OutputTarget):
    """LED output target — pairs an LED device with a ColorStripSource."""

    device_id: str = ""
    color_strip_source_id: str = ""
    brightness_value_source_id: str = ""
    fps: int = 30                   # target send FPS (1-90)
    keepalive_interval: float = 1.0 # seconds between keepalive sends when screen is static
    state_check_interval: int = DEFAULT_STATE_CHECK_INTERVAL
    min_brightness_threshold: int = 0  # brightness below this → 0 (disabled when 0)
    adaptive_fps: bool = False          # auto-reduce FPS when device is unresponsive
    protocol: str = "ddp"               # "ddp" (UDP) or "http" (JSON API)

    def register_with_manager(self, manager) -> None:
        """Register this WLED target with the processor manager."""
        if self.device_id:
            manager.add_target(
                target_id=self.id,
                device_id=self.device_id,
                color_strip_source_id=self.color_strip_source_id,
                fps=self.fps,
                keepalive_interval=self.keepalive_interval,
                state_check_interval=self.state_check_interval,
                brightness_value_source_id=self.brightness_value_source_id,
                min_brightness_threshold=self.min_brightness_threshold,
                adaptive_fps=self.adaptive_fps,
                protocol=self.protocol,
            )

    def sync_with_manager(self, manager, *, settings_changed: bool,
                          css_changed: bool = False,
                          device_changed: bool = False,
                          brightness_vs_changed: bool = False) -> None:
        """Push changed fields to the processor manager."""
        if settings_changed:
            manager.update_target_settings(self.id, {
                "fps": self.fps,
                "keepalive_interval": self.keepalive_interval,
                "state_check_interval": self.state_check_interval,
                "min_brightness_threshold": self.min_brightness_threshold,
                "adaptive_fps": self.adaptive_fps,
            })
        if css_changed:
            manager.update_target_css(self.id, self.color_strip_source_id)
        if device_changed:
            manager.update_target_device(self.id, self.device_id)
        if brightness_vs_changed:
            manager.update_target_brightness_vs(self.id, self.brightness_value_source_id)

    def update_fields(self, *, name=None, device_id=None, color_strip_source_id=None,
                      brightness_value_source_id=None,
                      fps=None, keepalive_interval=None, state_check_interval=None,
                      min_brightness_threshold=None, adaptive_fps=None, protocol=None,
                      description=None, tags: Optional[List[str]] = None,
                      **_kwargs) -> None:
        """Apply mutable field updates for WLED targets."""
        super().update_fields(name=name, description=description, tags=tags)
        if device_id is not None:
            self.device_id = device_id
        if color_strip_source_id is not None:
            self.color_strip_source_id = color_strip_source_id
        if brightness_value_source_id is not None:
            self.brightness_value_source_id = brightness_value_source_id
        if fps is not None:
            self.fps = fps
        if keepalive_interval is not None:
            self.keepalive_interval = keepalive_interval
        if state_check_interval is not None:
            self.state_check_interval = state_check_interval
        if min_brightness_threshold is not None:
            self.min_brightness_threshold = min_brightness_threshold
        if adaptive_fps is not None:
            self.adaptive_fps = adaptive_fps
        if protocol is not None:
            self.protocol = protocol

    @property
    def has_picture_source(self) -> bool:
        return bool(self.color_strip_source_id)

    def to_dict(self) -> dict:
        """Convert to dictionary."""
        d = super().to_dict()
        d["device_id"] = self.device_id
        d["color_strip_source_id"] = self.color_strip_source_id
        d["brightness_value_source_id"] = self.brightness_value_source_id
        d["fps"] = self.fps
        d["keepalive_interval"] = self.keepalive_interval
        d["state_check_interval"] = self.state_check_interval
        d["min_brightness_threshold"] = self.min_brightness_threshold
        d["adaptive_fps"] = self.adaptive_fps
        d["protocol"] = self.protocol
        return d

    @classmethod
    def from_dict(cls, data: dict) -> "WledOutputTarget":
        """Create from dictionary."""
        return cls(
            id=data["id"],
            name=data["name"],
            target_type="led",
            device_id=data.get("device_id", ""),
            color_strip_source_id=data.get("color_strip_source_id", ""),
            brightness_value_source_id=data.get("brightness_value_source_id", ""),
            fps=data.get("fps", 30),
            keepalive_interval=data.get("keepalive_interval", 1.0),
            state_check_interval=data.get("state_check_interval", DEFAULT_STATE_CHECK_INTERVAL),
            min_brightness_threshold=data.get("min_brightness_threshold", 0),
            adaptive_fps=data.get("adaptive_fps", False),
            protocol=data.get("protocol", "ddp"),
            description=data.get("description"),
            tags=data.get("tags", []),
            created_at=datetime.fromisoformat(data.get("created_at", datetime.now(timezone.utc).isoformat())),
            updated_at=datetime.fromisoformat(data.get("updated_at", datetime.now(timezone.utc).isoformat())),
        )