import os
import shlex


def _env_bool(name: str, default: bool) -> bool:
    value = os.getenv(name)
    if value is None:
        return default
    return value.strip().lower() in {"1", "true", "yes", "on"}


def _env_args(name: str, default: str = "") -> list[str]:
    value = os.getenv(name, default)
    if not value.strip():
        return []
    return shlex.split(value)


SYSTEM_MESSAGE = (
    "你是一个友好、幽默的AI虚拟主播。你可以看到用户摄像头传来的画面，也能听到他们的话。"
    "请用简短、自然、热情的中文口语回答，每次回答控制在两三句话以内，不要输出任何 Markdown 格式。"
    "当用户询问实时天气、最新新闻或网页信息时，优先使用可用工具先查询再回答。"
)

WHISPER_MODEL_NAME = "base"
WHISPER_DEVICE = "cpu"
WHISPER_COMPUTE_TYPE = "int8"
WHISPER_LANGUAGE = "zh"
WHISPER_BEAM_SIZE = 5

TTS_VOICE = "zh-CN-XiaoxiaoNeural"
OLLAMA_MODEL = "qwen3-vl:latest"

SERVER_HOST = "0.0.0.0"
SERVER_PORT = 8000

ENABLE_MCP_TOOLS = _env_bool("ENABLE_MCP_TOOLS", True)
MCP_SERVER_READ_TIMEOUT_SECONDS = float(os.getenv("MCP_SERVER_READ_TIMEOUT_SECONDS", "30"))

MCP_WEATHER_SERVER_COMMAND = os.getenv("MCP_WEATHER_SERVER_COMMAND", "")
MCP_WEATHER_SERVER_ARGS = _env_args("MCP_WEATHER_SERVER_ARGS")

MCP_WEBSEARCH_SERVER_COMMAND = os.getenv("MCP_WEBSEARCH_SERVER_COMMAND", "")
MCP_WEBSEARCH_SERVER_ARGS = _env_args("MCP_WEBSEARCH_SERVER_ARGS")