import os

import httpx

from .base import Notifier


class GatewayNotifier(Notifier):
    def __init__(self, base_url: str = "", token: str = "",
                 channels: list[str] | None = None,
                 telegram_bot: str = "") -> None:
        self.base_url = (base_url or os.getenv(
            "NOTIFY_GATEWAY_URL", "http://notify-gateway:8770"
        )).rstrip("/")
        self.token = token or os.getenv("NOTIFY_GATEWAY_TOKEN", "")
        self.channels = channels or []
        self.telegram_bot = telegram_bot.strip()
        if not self.token:
            raise RuntimeError("NOTIFY_GATEWAY_TOKEN is not configured")
        if not self.channels:
            raise RuntimeError("notification channels must be explicitly configured")
        if "telegram" in self.channels and not self.telegram_bot:
            raise RuntimeError("telegram_bot is required when Telegram is selected")

    async def send(self, title: str, text: str, idempotency_key: str = "",
                   images: list[dict] | None = None) -> None:
        payload = {"title": title, "text": text, "channels": self.channels}
        if "telegram" in self.channels:
            payload["telegram_bot"] = self.telegram_bot
        if images:
            payload["images"] = [
                {key: image[key] for key in ("filename", "content_type", "data_base64")}
                for image in images
            ]
        if idempotency_key:
            payload["idempotency_key"] = idempotency_key
        async with httpx.AsyncClient(timeout=90, trust_env=False) as client:
            response = await client.post(
                f"{self.base_url}/send",
                headers={"Authorization": f"Bearer {self.token}"},
                json=payload,
            )
        response.raise_for_status()
        data = response.json()
        if not data.get("ok"):
            raise RuntimeError(f"notify-gateway delivery incomplete: {data.get('results', {})}")