package nfs

import (
	"github.com/container-storage-interface/spec/lib/go/csi"
	"github.com/golang/glog"
	"golang.org/x/net/context"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
)

type ControllerServer struct {
	Driver *nfsDriver
}

func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *ControllerServer) ControllerPublishVolume(ctx context.Context, req *csi.ControllerPublishVolumeRequest) (*csi.ControllerPublishVolumeResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *ControllerServer) ControllerUnpublishVolume(ctx context.Context, req *csi.ControllerUnpublishVolumeRequest) (*csi.ControllerUnpublishVolumeResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *ControllerServer) ValidateVolumeCapabilities(ctx context.Context, req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error) {
	if len(req.GetVolumeId()) == 0 {
		return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
	}
	if req.GetVolumeCapabilities() == nil {
		return nil, status.Error(codes.InvalidArgument, "Volume capabilities missing in request")
	}

	// supports all AccessModes, no need to check capabilities here
	return &csi.ValidateVolumeCapabilitiesResponse{Message: ""}, nil
}

func (cs *ControllerServer) ListVolumes(ctx context.Context, req *csi.ListVolumesRequest) (*csi.ListVolumesResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *ControllerServer) GetCapacity(ctx context.Context, req *csi.GetCapacityRequest) (*csi.GetCapacityResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

// ControllerGetCapabilities implements the default GRPC callout.
// Default supports all capabilities
func (cs *ControllerServer) ControllerGetCapabilities(ctx context.Context, req *csi.ControllerGetCapabilitiesRequest) (*csi.ControllerGetCapabilitiesResponse, error) {
	glog.V(5).Infof("Using default ControllerGetCapabilities")

	return &csi.ControllerGetCapabilitiesResponse{
		Capabilities: cs.Driver.cscap,
	}, nil
}

func (cs *ControllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateSnapshotRequest) (*csi.CreateSnapshotResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *ControllerServer) DeleteSnapshot(ctx context.Context, req *csi.DeleteSnapshotRequest) (*csi.DeleteSnapshotResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *ControllerServer) ListSnapshots(ctx context.Context, req *csi.ListSnapshotsRequest) (*csi.ListSnapshotsResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *ControllerServer) ControllerExpandVolume(ctx context.Context, req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}