import logging

from langsmith import Client
from langsmith.integrations.otel import configure

from zbt.core.config import Settings

logger = logging.getLogger(__name__)
_otel_configured = False


def configure_langsmith_otel(settings: Settings) -> bool:
    """将项目自定义工作流 Span 发送到当前 LangSmith 项目。"""

    global _otel_configured
    if _otel_configured:
        return True
    if (
        not settings.langsmith_tracing
        or not settings.langsmith_otel_enabled
        or not settings.langsmith_api_key
    ):
        return False
    try:
        client = Client(
            api_url=settings.langsmith_endpoint,
            api_key=settings.langsmith_api_key,
        )
        try:
            project = client.read_project(
                project_name=settings.langsmith_project,
            )
        except Exception:
            project = client.create_project(
                settings.langsmith_project,
                description="智保通第三阶段Agent与LangGraph运行轨迹",
                upsert=True,
            )
        # OTLP请求头必须是ASCII；官方接口也接受项目UUID作为目标标识。
        _otel_configured = configure(
            api_key=settings.langsmith_api_key,
            project_name=str(project.id),
        )
    except Exception:
        logger.exception("LangSmith OpenTelemetry项目解析失败")
        return False
    if not _otel_configured:
        logger.warning("LangSmith OpenTelemetry 初始化未生效")
    return _otel_configured