//
// Copyright (c) 2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

package virtcontainers

import (
	"fmt"
)

// This is the no proxy implementation of the proxy interface. This
// is a generic implementation for any case (basically any agent),
// where no actual proxy is needed. This happens when the combination
// of the VM and the agent can handle multiple connections without
// additional component to handle the multiplexing. Both the runtime
// and the shim will connect to the agent through the VM, bypassing
// the proxy model.
// That's why this implementation is very generic, and all it does
// is to provide both shim and runtime the correct URL to connect
// directly to the VM.
type noProxy struct {
}

// start is noProxy start implementation for proxy interface.
func (p *noProxy) start(pod Pod, params proxyParams) (int, string, error) {
	if params.agentURL == "" {
		return -1, "", fmt.Errorf("AgentURL cannot be empty")
	}

	return 0, params.agentURL, nil
}

// stop is noProxy stop implementation for proxy interface.
func (p *noProxy) stop(pod Pod, pid int) error {
	return nil
}