from __future__ import annotations

import time
from typing import Any, Dict

import requests

from device.base import BaseDevice
from state import save


class ButtonDevice(BaseDevice):
    def __init__(self, state):
        super().__init__(state)
        self._ensure_channels(self._channel_count())
        for ch in self.state.channels:
            ch["state"] = "idle"

    def _channel_count(self) -> int:
        return 4

    def status(self) -> Dict[str, Any]:
        return {"channels": self.state.channels}

    def action(self, action_name: str, params: Dict[str, Any]) -> Dict[str, Any]:
        if action_name == "simulate_click":
            channel = params.get("channel", 0)
            return self.trigger_click(channel)

        return {
            "status": "error",
            "error": "IllegalActionOrParams",
            "message": "Device does not support this action or params",
        }

    def trigger_click(self, channel: int) -> Dict[str, Any]:
        if channel < 0 or channel >= len(self.state.channels):
            return {
                "status": "error",
                "error": "IllegalActionOrParams",
                "message": "Invalid channel index",
            }

        now = time.strftime("%Y-%m-%d %H:%M:%S")
        self.state.channels[channel]["last_event"] = "click"
        self.state.channels[channel]["last_event_time"] = now
        save(self.state)

        # Send event to server asynchronously (best-effort)
        self._send_event("click", channel)

        return {"status": "ok", "message": f"Click triggered on channel {channel}"}

    def _send_event(self, event_name: str, channel: int) -> None:
        server_url = self.state.server_url.rstrip("/")
        url = f"{server_url}/events/new"
        payload = {
            "event_name": event_name,
            "device_id": self.state.device_id,
            "data": {"channel": channel},
        }
        try:
            requests.post(url, json=payload, timeout=3)
        except Exception:
            pass  # Best-effort; server may be offline