from __future__ import annotations

import os
from dataclasses import dataclass
from dotenv import load_dotenv

BASE_DIR = os.path.dirname(os.path.abspath(__file__))
ENV_PATH = os.path.join(BASE_DIR, ".env")

# override=True is intentional: the .env next to this bot is the source of truth.
load_dotenv(ENV_PATH, override=True)


def _csv_ints(value: str) -> set[int]:
    result: set[int] = set()
    for part in (value or "").split(","):
        part = part.strip()
        if not part:
            continue
        try:
            result.add(int(part))
        except ValueError:
            pass
    return result


def _clean_token(value: str) -> str:
    """
    Accepts the normal Discord bot token format while removing common copy/paste errors:
    - surrounding quotes
    - accidental 'Bot ' prefix
    - leading/trailing whitespace
    """
    token = (value or "").strip()

    if len(token) >= 2 and token[0] == token[-1] and token[0] in {'"', "'"}:
        token = token[1:-1].strip()

    if token.lower().startswith("bot "):
        token = token[4:].strip()

    return token


@dataclass(frozen=True)
class Settings:
    token: str = _clean_token(os.getenv("DISCORD_TOKEN", ""))
    service_owner_ids: set[int] = frozenset(_csv_ints(os.getenv("SERVICE_OWNER_IDS", "")))
    global_log_channel_id: int = int(os.getenv("GLOBAL_LOG_CHANNEL_ID", "0") or 0)
    data_dir: str = (os.getenv("DATA_DIR", r"C:\NovaShieldData").strip() or r"C:\NovaShieldData")


settings = Settings()