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#ifndef GRPCXX_CHANNEL_INTERFACE_H
#define GRPCXX_CHANNEL_INTERFACE_H

#include <memory>

#include <grpc/grpc.h>
#include <grpc++/status.h>
#include <grpc++/impl/call.h>

struct grpc_call;

namespace grpc {
class Call;
class CallOpBuffer;
class ClientContext;
class CompletionQueue;
class RpcMethod;
class CallInterface;

class ChannelInterface : public CallHook,
                         public std::enable_shared_from_this<ChannelInterface> {
 public:
  virtual ~ChannelInterface() {}

  virtual void* RegisterMethod(const char* method_name) = 0;
  virtual Call CreateCall(const RpcMethod& method, ClientContext* context,
                          CompletionQueue* cq) = 0;

  virtual grpc_connectivity_state GetState(bool try_to_connect) = 0;

  template <typename T>
  virtual void NotifyOnStateChange(grpc_connectivity_state last_observed,
                                   grpc_connectivity_state* optional_new_state,
                                   const T& deadline,
                                   CompletionQueue* cq, void* tag) = 0;
  template <typename T>
  virtual bool WaitForStateChange(grpc_connectivity_state last_observed,
                                  grpc_connectivity_state* new_state,
                                  const T& deadline) = 0;
};

}  // namespace grpc

#endif  // GRPCXX_CHANNEL_INTERFACE_H