"""
API日志中间件 - 管理端专用
"""
import time
from app.database import SessionLocal
from app.models.api_log import APILog
from app.core.logger import logger, get_logger_by_path
from app.utils.timezone import beijing_now


class APILoggingASGIMiddleware:
    """更可靠的 ASGI 层日志中间件，捕获请求/响应流（用于记录完整返回报文）"""

    def __init__(self, app):
        self.app = app

    async def __call__(self, scope, receive, send):
        if scope.get("type") != "http":
            await self.app(scope, receive, send)
            return

        start_time = time.time()
        method = scope.get("method")
        server = scope.get("server") or ("localhost", 80)
        path = scope.get("raw_path", b"").decode("utf-8", errors="ignore")
        query_string = scope.get("query_string", b"").decode("utf-8", errors="ignore")
        scheme = scope.get("scheme", "http")
        url = f"{scheme}://{server[0]}:{server[1]}{path}" + (f"?{query_string}" if query_string else "")
        client = scope.get("client")
        client_ip = client[0] if client else None
        headers = {k.decode("utf-8"): v.decode("utf-8") for k, v in scope.get("headers", [])}
        user_agent = headers.get("user-agent", "")

        # 直接从请求头获取user_id和user_name，进行组合校验
        user_id = None
        admin_id = None
        try:
            # 从header获取user_id和user_name
            header_user_id = headers.get("x-user-id") or headers.get("X-User-Id")
            header_user_name = headers.get("x-user-name") or headers.get("X-User-Name")

            if header_user_id and header_user_name:
                # 管理端：从Admin表查询
                db_temp = SessionLocal()
                try:
                    from app.models.admin import Admin
                    admin = db_temp.query(Admin).filter(
                        Admin.id == int(header_user_id),
                        Admin.username == header_user_name
                    ).first()
                    if admin:
                        admin_id = admin.id
                finally:
                    db_temp.close()
        except Exception:
            # 如果header验证失败，记录为None
            user_id = None
            admin_id = None

        # 包装 receive，收集请求体（仅在有 body 时）
        body_bytes = b""
        async def receive_wrapper():
            nonlocal body_bytes
            message = await receive()
            if message.get("type") == "http.request":
                body_bytes += message.get("body", b"")
            return message

        # 包装 send，收集响应状态与 body 分片
        status_code = 500
        resp_chunks = []
        async def send_wrapper(message):
            nonlocal status_code, resp_chunks
            if message.get("type") == "http.response.start":
                status_code = message.get("status", 0)
            if message.get("type") == "http.response.body":
                chunk = message.get("body", b"")
                if chunk:
                    resp_chunks.append(chunk)
            await send(message)

        # 调用下游应用并在返回后记录日志
        try:
            await self.app(scope, receive_wrapper, send_wrapper)
        finally:
            try:
                response_body_bytes = b"".join(resp_chunks) if resp_chunks else b""
                try:
                    response_text = response_body_bytes.decode("utf-8", errors="ignore") if response_body_bytes else None
                except Exception:
                    response_text = str(response_body_bytes)
                if not response_text:
                    response_text = f"Status: {status_code}"
                if len(response_text) > 2000:
                    response_text = response_text[:2000] + "..."

                request_text = None
                if body_bytes:
                    try:
                        request_text = body_bytes.decode("utf-8", errors="ignore")
                        if len(request_text) > 2000:
                            request_text = request_text[:2000] + "..."
                    except Exception:
                        request_text = str(body_bytes)

                # 计算执行时间
                execution_time = int((time.time() - start_time) * 1000)

                # 根据路径选择对应的logger
                api_logger = get_logger_by_path(path)

                # 在控制台打印API入参出参
                try:
                    request_display = request_text[:1000] + ('...' if request_text and len(request_text) > 1000 else '') if request_text else 'None'
                    response_display = response_text[:1000] + ('...' if response_text and len(response_text) > 1000 else '') if response_text else 'None'
                    api_logger.info(f"[API请求] {method} {url} - 请求数据: {request_display}")
                    api_logger.info(f"[API响应] {method} {url} - 响应数据: {response_display} - 执行时间: {execution_time}ms")
                except Exception as e:
                    api_logger.warning(f"[API日志] 控制台日志输出失败: {e}")

                # 写入数据库（异步性与错误容忍）
                try:
                    db = SessionLocal()
                    try:
                        # 临时调试日志：打印请求头中的 X-User-Id/X-User-Name 与 scope 注入的 verified ids
                        try:
                            headers_lower = {k.lower(): v for k, v in headers.items()} if 'headers' in locals() else {}
                            xu = headers_lower.get('x-user-id') or headers_lower.get('x-user-name') or None
                        except Exception:
                            xu = None
                        api_logger.debug(f"[APILoggingASGI][DEBUG] endpoint={url} verified_user_id={scope.get('verified_user_id')} verified_admin_id={scope.get('verified_admin_id')} header_X_User_Id={xu}")
                        api_log = APILog(
                            user_id=user_id,
                            admin_id=scope.get("verified_admin_id") if scope.get("verified_admin_id") else None,
                            endpoint=url,
                            method=method,
                            request_data=request_text if request_text else None,
                            response_data=response_text if response_text else None,
                            ip_address=client_ip,
                            user_agent=user_agent,
                            response_code=status_code,
                            execution_time=execution_time,
                            created_at=beijing_now()
                        )
                        db.add(api_log)
                        db.commit()
                        api_logger.debug(f"[APILoggingASGI] 成功记录API日志: {url} {method} {status_code} {execution_time}ms")
                    except Exception as e:
                        db.rollback()
                        api_logger.error(f"[APILoggingASGI] 记录API日志失败: {url} {method} {status_code}", exc_info=True)
                    finally:
                        db.close()
                except Exception as e:
                    api_logger.error(f"[APILoggingASGI] 创建数据库连接失败: {e}")
            except Exception:
                pass