"""MCP Server 配置（环境变量，生产用 .env 注入）。"""
import os


def _env(key, default):
    return os.environ.get(key, default)


class Settings:
    # 平台（auto_control）地址与账号
    platform_url = _env("MCP_PLATFORM_URL", "http://127.0.0.1:18050")
    platform_user = _env("MCP_PLATFORM_USER", "admin")
    platform_pass = _env("MCP_PLATFORM_PASS", "")

    # 安全
    allow_write = _env("MCP_ALLOW_WRITE", "0") == "1"   # 写操作门控（默认只读）
    allowed_serials = [s.strip() for s in
                       _env("MCP_ALLOWED_SERIALS", "").split(",") if s.strip()]  # 空=不限

    # 传输
    http_host = _env("MCP_HTTP_HOST", "0.0.0.0")
    http_port = int(_env("MCP_HTTP_PORT", "8033"))

    # 截图
    screenshot_width = int(_env("MCP_SCREENSHOT_WIDTH", "540"))
    jpeg_quality = int(_env("MCP_JPEG_QUALITY", "70"))

    # 审计
    audit_file = _env("MCP_AUDIT_FILE", "/var/log/mcp/audit.log")

    # 平台请求超时（秒）
    platform_timeout = float(_env("MCP_PLATFORM_TIMEOUT", "30"))