{%- import "interface_macros.tmpl" as interface_macros %}
{%- set class_name = interface.name %}
{%- set proxy_name = interface.name ~ "Proxy" %}

{%- macro pass_params(parameters) %}
{%-   for param in parameters %}
{%-     if param.kind|is_object_kind -%}
mojo::internal::Wrap(params->{{param.name}}())
{%-     elif param.kind|is_interface_kind -%}
mojo::MakeProxy<{{param.kind.name}}>(mojo::MakePassable(params->{{param.name}}()).Pass())
{%-     elif param.kind|is_handle_kind -%}
mojo::MakePassable(params->{{param.name}}()).Pass()
{%-     elif param.kind|is_enum_kind -%}
static_cast<{{param.kind|cpp_wrapper_type}}>(params->{{param.name}}())
{%-     else -%}
params->{{param.name}}()
{%-     endif -%}
{%-     if not loop.last %}, {% endif %}
{%-   endfor %}
{%- endmacro %}

{%- macro compute_payload_size(params_name, parameters) -%}
  size_t payload_size =
      mojo::internal::Align(sizeof({{params_name}}));
{#--- Computes #}
{%-   for param in parameters %}
{%-     if param.kind|is_object_kind %}
  if (!in_{{param.name}}.is_null())
    payload_size += mojo::internal::Unwrap(in_{{param.name}})->ComputeSize();
{%-     endif %}
{%-   endfor %}
{%- endmacro %}

{%- macro build_message(params_name, parameters) -%}
  {{params_name}}* params =
      {{params_name}}::New(builder.buffer());
{#--- Sets #}
{%   for param in parameters %}
{%-     if param.kind|is_object_kind %}
  if (!in_{{param.name}}.is_null())
    params->set_{{param.name}}(
        mojo::internal::Unwrap(in_{{param.name}})->Clone(builder.buffer()));
{%-     elif param.kind|is_interface_kind %}
  if (!in_{{param.name}}.get()) {
    params->set_{{param.name}}(mojo::MessagePipeHandle());
  } else {
    // Delegate handle.
    params->set_{{param.name}}(
        in_{{param.name}}.ResetAndReturnMessagePipe().release());
  }
{%-     elif param.kind|is_handle_kind %}
  params->set_{{param.name}}(in_{{param.name}}.release());
{%-     else %}
  params->set_{{param.name}}(in_{{param.name}});
{%-     endif %}
{%-   endfor %}
  mojo::Message message;
  params->EncodePointersAndHandles(message.mutable_handles());
  builder.Finish(&message);
{%- endmacro %}

{#--- ForwardToCallback definition #}
{%- for method in interface.methods -%}
{%-   if method.response_parameters != None %}
class {{class_name}}_{{method.name}}_ForwardToCallback
    : public mojo::MessageReceiver {
 public:
  {{class_name}}_{{method.name}}_ForwardToCallback(
      const {{interface_macros.declare_callback(method)}}& callback)
      : callback_(callback) {
  }
  virtual bool Accept(mojo::Message* message) MOJO_OVERRIDE;
  virtual bool AcceptWithResponder(
      mojo::Message* message,
      mojo::MessageReceiver* responder) MOJO_OVERRIDE {
    assert(false);
    return false;
  }
 private:
  {{interface_macros.declare_callback(method)}} callback_;
  MOJO_DISALLOW_COPY_AND_ASSIGN({{class_name}}_{{method.name}}_ForwardToCallback);
};
bool {{class_name}}_{{method.name}}_ForwardToCallback::Accept(
    mojo::Message* message) {
  internal::{{class_name}}_{{method.name}}_ResponseParams_Data* params =
      reinterpret_cast<internal::{{class_name}}_{{method.name}}_ResponseParams_Data*>(
          message->mutable_payload());

  if (!params->DecodePointersAndHandles(message))
    return false;
  callback_.Run({{pass_params(method.response_parameters)}});
  params->CloseHandles();
  return true;
}
{%-   endif %}
{%- endfor %}

{{proxy_name}}::{{proxy_name}}(mojo::MessageReceiver* receiver)
    : receiver_(receiver) {
}

{#--- Proxy definitions #}

{%- for method in interface.methods %}
{%-   set message_name =
          "internal::k%s_%s_Name"|format(interface.name, method.name) %}
{%-   set params_name =
          "internal::%s_%s_Params_Data"|format(interface.name, method.name) %}
void {{proxy_name}}::{{method.name}}(
    {{interface_macros.declare_request_params("in_", method)}}) {
  {{compute_payload_size(params_name, method.parameters)}}

{%- if method.response_parameters != None %}
  mojo::internal::RequestMessageBuilder builder({{message_name}}, payload_size);
{%- else %}
  mojo::internal::MessageBuilder builder({{message_name}}, payload_size);
{%- endif %}

  {{build_message(params_name, method.parameters)}}

{%- if method.response_parameters != None %}
  mojo::MessageReceiver* responder =
      new {{class_name}}_{{method.name}}_ForwardToCallback(callback);
  if (!receiver_->AcceptWithResponder(&message, responder))
    delete responder;
{%- else %}
  bool ok MOJO_ALLOW_UNUSED = receiver_->Accept(&message);
  // This return value may be ignored as !ok implies the Connector has
  // encountered an error, which will be visible through other means.
{%- endif %}
}
{%- endfor %}

{#--- ProxyToResponder definition #}
{%- for method in interface.methods -%}
{%-   if method.response_parameters != None %}
{%-     set message_name =
            "internal::k%s_%s_Name"|format(interface.name, method.name) %}
{%-     set params_name =
            "internal::%s_%s_ResponseParams_Data"|format(interface.name, method.name) %}
class {{class_name}}_{{method.name}}_ProxyToResponder
    : public {{interface_macros.declare_callback(method)}}::Runnable {
 public:
  virtual ~{{class_name}}_{{method.name}}_ProxyToResponder() {
    delete responder_;
  }

  {{class_name}}_{{method.name}}_ProxyToResponder(
      uint64_t request_id,
      mojo::MessageReceiver* responder)
      : request_id_(request_id),
        responder_(responder) {
  }

  virtual void Run({{interface_macros.declare_params("in_", method.response_parameters)}}) const;

 private:
  uint64_t request_id_;
  mutable mojo::MessageReceiver* responder_;
  MOJO_DISALLOW_COPY_AND_ASSIGN({{class_name}}_{{method.name}}_ProxyToResponder);
};
void {{class_name}}_{{method.name}}_ProxyToResponder::Run(
    {{interface_macros.declare_params("in_", method.response_parameters)}}) const {
  {{compute_payload_size(params_name, method.response_parameters)}}
  mojo::internal::ResponseMessageBuilder builder(
      {{message_name}}, payload_size, request_id_);
  {{build_message(params_name, method.response_parameters)}}
  bool ok MOJO_ALLOW_UNUSED = responder_->Accept(&message);
  // TODO(darin): !ok returned here indicates a malformed message, and that may
  // be good reason to close the connection. However, we don't have a way to do
  // that from here. We should add a way.
  delete responder_;
  responder_ = NULL;
}
{%-   endif -%}
{%- endfor %}

{{class_name}}Stub::{{class_name}}Stub()
    : sink_(NULL) {
}

{#--- Stub definition #}

bool {{class_name}}Stub::Accept(mojo::Message* message) {
{%- if interface.methods %}
  switch (message->header()->name) {
{%-   for method in interface.methods %}
    case internal::k{{class_name}}_{{method.name}}_Name: {
{%-     if method.response_parameters == None %}
      internal::{{class_name}}_{{method.name}}_Params_Data* params =
          reinterpret_cast<internal::{{class_name}}_{{method.name}}_Params_Data*>(
              message->mutable_payload());

      if (!params->DecodePointersAndHandles(message))
        return false;
      sink_->{{method.name}}({{pass_params(method.parameters)}});
      params->CloseHandles();
      return true;
{%-     else %}
      break;
{%-     endif %}
    }
{%-   endfor %}
  }
{%- endif %}
  return false;
}

bool {{class_name}}Stub::AcceptWithResponder(
    mojo::Message* message, mojo::MessageReceiver* responder) {
{%- if interface.methods %}
  switch (message->header()->name) {
{%-   for method in interface.methods %}
    case internal::k{{class_name}}_{{method.name}}_Name: {
{%-     if method.response_parameters != None %}
      internal::{{class_name}}_{{method.name}}_Params_Data* params =
          reinterpret_cast<internal::{{class_name}}_{{method.name}}_Params_Data*>(
              message->mutable_payload());

      if (!params->DecodePointersAndHandles(message))
        return false;
      {{interface_macros.declare_callback(method)}}::Runnable* runnable =
          new {{class_name}}_{{method.name}}_ProxyToResponder(
              message->request_id(), responder);
      {{interface_macros.declare_callback(method)}} callback(runnable);
      sink_->{{method.name}}(
{%- if method.parameters -%}{{pass_params(method.parameters)}}, {% endif -%}callback);
      params->CloseHandles();
      return true;
{%-     else %}
      break;
{%-     endif %}
    }
{%-   endfor %}
  }
{%- endif %}
  return false;
}