"""Configuration loader for MCP Bridge."""

import os
from pathlib import Path

BASE_DIR = Path(__file__).resolve().parent.parent
CREDENTIALS_FILE = BASE_DIR / "credentials"
DB_PATH = BASE_DIR / "data" / "bridge.db"
MEDIA_DIR = BASE_DIR / "media"

# MCP server settings
MCP_HOST = "0.0.0.0"
MCP_PORT = 8321


def load_credentials() -> dict[str, str]:
    """Load credentials from KEY=VALUE file."""
    config = {}
    if CREDENTIALS_FILE.exists():
        with open(CREDENTIALS_FILE) as f:
            for line in f:
                line = line.strip()
                if "=" in line and not line.startswith("#"):
                    key, value = line.split("=", 1)
                    config[key.strip()] = value.strip()
    return config


def get_bot_token() -> str:
    creds = load_credentials()
    token = creds.get("MCP_BOT_TOKEN", "")
    if not token:
        raise RuntimeError("MCP_BOT_TOKEN not set in credentials file")
    return token


def get_group_chat_id() -> int:
    creds = load_credentials()
    chat_id = creds.get("GROUP_CHAT_ID", "")
    if not chat_id:
        raise RuntimeError("GROUP_CHAT_ID not set in credentials file")
    return int(chat_id)


def get_homelab_bot_id() -> int | None:
    """Optional: ID of the existing homelab bot for sender_type classification."""
    creds = load_credentials()
    bot_id = creds.get("HOMELAB_BOT_ID", "")
    return int(bot_id) if bot_id else None