"""Discord REST API 클라이언트."""
from __future__ import annotations

import logging
import os

import httpx

logger = logging.getLogger(__name__)

DISCORD_API_BASE = "https://discord.com/api/v10"


class DiscordClient:
    def __init__(self, token: str):
        self.token = token
        self._client = httpx.AsyncClient(
            base_url=DISCORD_API_BASE,
            headers={"Authorization": f"Bot {self.token}"},
            timeout=15.0,
        )

    async def send_message(self, channel_id: str, content: str) -> dict:
        resp = await self._client.post(
            f"/channels/{channel_id}/messages",
            json={"content": content},
        )
        resp.raise_for_status()
        return resp.json()

    async def send_thread_reply(self, channel_id: str, thread_id: str, content: str) -> dict:
        return await self.send_message(channel_id=thread_id, content=content)

    async def close(self):
        await self._client.aclose()


_client: DiscordClient | None = None


def get_discord_client() -> DiscordClient:
    global _client
    if _client is None:
        _client = DiscordClient(token=os.environ.get("DISCORD_TOKEN", ""))
    return _client