"""
gRPC client for SDK Bridge communication
"""
import grpc
from typing import Optional, List
import structlog
from config import settings

# TODO: Import generated protobuf classes after running protoc
# from protos import camera_pb2, camera_pb2_grpc
# from protos import monitor_pb2, monitor_pb2_grpc
# from protos import crossswitch_pb2, crossswitch_pb2_grpc

logger = structlog.get_logger()

class SDKBridgeClient:
    """gRPC client for communicating with SDK Bridge"""

    def __init__(self):
        self._channel: Optional[grpc.aio.Channel] = None
        # TODO: Initialize stubs after protobuf generation
        # self._camera_stub = None
        # self._monitor_stub = None
        # self._crossswitch_stub = None

    async def connect(self):
        """Initialize gRPC channel to SDK Bridge"""
        try:
            logger.info("sdk_bridge_connecting", url=settings.sdk_bridge_url)

            # Create async gRPC channel
            self._channel = grpc.aio.insecure_channel(
                settings.sdk_bridge_url,
                options=[
                    ('grpc.max_send_message_length', 50 * 1024 * 1024),  # 50MB
                    ('grpc.max_receive_message_length', 50 * 1024 * 1024),  # 50MB
                    ('grpc.keepalive_time_ms', 30000),  # 30 seconds
                    ('grpc.keepalive_timeout_ms', 10000),  # 10 seconds
                ]
            )

            # TODO: Initialize service stubs after protobuf generation
            # self._camera_stub = camera_pb2_grpc.CameraServiceStub(self._channel)
            # self._monitor_stub = monitor_pb2_grpc.MonitorServiceStub(self._channel)
            # self._crossswitch_stub = crossswitch_pb2_grpc.CrossSwitchServiceStub(self._channel)

            # Test connection with health check
            # await self.health_check()

            logger.info("sdk_bridge_connected")
        except Exception as e:
            logger.error("sdk_bridge_connection_failed", error=str(e))
            raise

    async def close(self):
        """Close gRPC channel"""
        try:
            if self._channel:
                await self._channel.close()
            logger.info("sdk_bridge_closed")
        except Exception as e:
            logger.error("sdk_bridge_close_failed", error=str(e))

    async def health_check(self) -> dict:
        """Check SDK Bridge health"""
        try:
            logger.debug("sdk_bridge_health_check")
            # TODO: Implement after protobuf generation
            # request = crossswitch_pb2.Empty()
            # response = await self._crossswitch_stub.HealthCheck(request, timeout=5.0)
            # return {
            #     "is_healthy": response.is_healthy,
            #     "sdk_status": response.sdk_status,
            #     "geviserver_host": response.geviserver_host
            # }
            return {"is_healthy": True, "sdk_status": "connected", "geviserver_host": "localhost"}
        except grpc.RpcError as e:
            logger.error("sdk_bridge_health_check_failed", error=str(e))
            return {"is_healthy": False, "sdk_status": "error", "error": str(e)}

    async def list_cameras(self) -> List[dict]:
        """List all cameras from GeViServer"""
        try:
            logger.debug("sdk_bridge_list_cameras")
            # TODO: Implement after protobuf generation
            # request = camera_pb2.ListCamerasRequest()
            # response = await self._camera_stub.ListCameras(request, timeout=10.0)
            # return [
            #     {
            #         "id": camera.id,
            #         "name": camera.name,
            #         "description": camera.description,
            #         "has_ptz": camera.has_ptz,
            #         "has_video_sensor": camera.has_video_sensor,
            #         "status": camera.status
            #     }
            #     for camera in response.cameras
            # ]
            return []  # Placeholder
        except grpc.RpcError as e:
            logger.error("sdk_bridge_list_cameras_failed", error=str(e))
            raise

    async def get_camera(self, camera_id: int) -> Optional[dict]:
        """Get camera details"""
        try:
            logger.debug("sdk_bridge_get_camera", camera_id=camera_id)
            # TODO: Implement after protobuf generation
            # request = camera_pb2.GetCameraRequest(camera_id=camera_id)
            # response = await self._camera_stub.GetCamera(request, timeout=5.0)
            # return {
            #     "id": response.id,
            #     "name": response.name,
            #     "description": response.description,
            #     "has_ptz": response.has_ptz,
            #     "has_video_sensor": response.has_video_sensor,
            #     "status": response.status
            # }
            return None  # Placeholder
        except grpc.RpcError as e:
            if e.code() == grpc.StatusCode.NOT_FOUND:
                return None
            logger.error("sdk_bridge_get_camera_failed", camera_id=camera_id, error=str(e))
            raise

    async def list_monitors(self) -> List[dict]:
        """List all monitors from GeViServer"""
        try:
            logger.debug("sdk_bridge_list_monitors")
            # TODO: Implement after protobuf generation
            # request = monitor_pb2.ListMonitorsRequest()
            # response = await self._monitor_stub.ListMonitors(request, timeout=10.0)
            # return [
            #     {
            #         "id": monitor.id,
            #         "name": monitor.name,
            #         "description": monitor.description,
            #         "is_active": monitor.is_active,
            #         "current_camera_id": monitor.current_camera_id,
            #         "status": monitor.status
            #     }
            #     for monitor in response.monitors
            # ]
            return []  # Placeholder
        except grpc.RpcError as e:
            logger.error("sdk_bridge_list_monitors_failed", error=str(e))
            raise

    async def execute_crossswitch(self, camera_id: int, monitor_id: int, mode: int = 0) -> dict:
        """Execute cross-switch operation"""
        try:
            logger.info("sdk_bridge_crossswitch", camera_id=camera_id, monitor_id=monitor_id, mode=mode)
            # TODO: Implement after protobuf generation
            # request = crossswitch_pb2.CrossSwitchRequest(
            #     camera_id=camera_id,
            #     monitor_id=monitor_id,
            #     mode=mode
            # )
            # response = await self._crossswitch_stub.ExecuteCrossSwitch(request, timeout=10.0)
            # return {
            #     "success": response.success,
            #     "message": response.message,
            #     "camera_id": response.camera_id,
            #     "monitor_id": response.monitor_id
            # }
            return {"success": True, "message": "Placeholder", "camera_id": camera_id, "monitor_id": monitor_id}
        except grpc.RpcError as e:
            logger.error("sdk_bridge_crossswitch_failed", error=str(e))
            raise

    async def clear_monitor(self, monitor_id: int) -> dict:
        """Clear monitor (stop video)"""
        try:
            logger.info("sdk_bridge_clear_monitor", monitor_id=monitor_id)
            # TODO: Implement after protobuf generation
            # request = crossswitch_pb2.ClearMonitorRequest(monitor_id=monitor_id)
            # response = await self._crossswitch_stub.ClearMonitor(request, timeout=10.0)
            # return {
            #     "success": response.success,
            #     "message": response.message,
            #     "monitor_id": response.monitor_id
            # }
            return {"success": True, "message": "Placeholder", "monitor_id": monitor_id}
        except grpc.RpcError as e:
            logger.error("sdk_bridge_clear_monitor_failed", error=str(e))
            raise

    async def get_routing_state(self) -> dict:
        """Get current routing state"""
        try:
            logger.debug("sdk_bridge_get_routing_state")
            # TODO: Implement after protobuf generation
            # request = crossswitch_pb2.GetRoutingStateRequest()
            # response = await self._crossswitch_stub.GetRoutingState(request, timeout=10.0)
            # return {
            #     "routes": [
            #         {
            #             "camera_id": route.camera_id,
            #             "monitor_id": route.monitor_id,
            #             "camera_name": route.camera_name,
            #             "monitor_name": route.monitor_name
            #         }
            #         for route in response.routes
            #     ],
            #     "total_routes": response.total_routes
            # }
            return {"routes": [], "total_routes": 0}  # Placeholder
        except grpc.RpcError as e:
            logger.error("sdk_bridge_get_routing_state_failed", error=str(e))
            raise

# Global SDK Bridge client instance
sdk_bridge_client = SDKBridgeClient()

# Convenience functions
async def init_sdk_bridge():
    """Initialize SDK Bridge connection (call on startup)"""
    await sdk_bridge_client.connect()

async def close_sdk_bridge():
    """Close SDK Bridge connection (call on shutdown)"""
    await sdk_bridge_client.close()
