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// Copyright 2015-2019 SWIM.AI inc.
//
// 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 swim.runtime.lane;

import swim.api.Link;
import swim.api.SwimContext;
import swim.api.agent.AgentContext;
import swim.api.http.function.DecodeRequestHttp;
import swim.api.http.function.DidRequestHttp;
import swim.api.http.function.DidRespondHttp;
import swim.api.http.function.DoRespondHttp;
import swim.api.http.function.WillRequestHttp;
import swim.api.http.function.WillRespondHttp;
import swim.api.lane.DemandLane;
import swim.api.lane.Lane;
import swim.api.lane.function.DidCommand;
import swim.api.lane.function.DidEnter;
import swim.api.lane.function.DidLeave;
import swim.api.lane.function.DidUplink;
import swim.api.lane.function.OnCue;
import swim.api.lane.function.WillCommand;
import swim.api.lane.function.WillEnter;
import swim.api.lane.function.WillLeave;
import swim.api.lane.function.WillUplink;
import swim.api.uplink.Uplink;
import swim.concurrent.Conts;
import swim.structure.Form;
import swim.structure.Value;

public class DemandLaneView extends LaneView implements DemandLane {
  protected final AgentContext agentContext;
  protected Form valueForm;

  protected DemandLaneModel laneBinding;
  protected volatile OnCue onCue;

  public DemandLaneView(AgentContext agentContext, Form valueForm, Object observers) {
    super(observers);
    this.agentContext = agentContext;
    this.valueForm = valueForm;
    this.onCue = onCue;
  }

  public DemandLaneView(AgentContext agentContext, Form valueForm) {
    this(agentContext, valueForm, null);
  }

  @Override
  public AgentContext agentContext() {
    return this.agentContext;
  }

  @Override
  public DemandLaneModel getLaneBinding() {
    return this.laneBinding;
  }

  void setLaneBinding(DemandLaneModel laneBinding) {
    this.laneBinding = laneBinding;
  }

  @Override
  public DemandLaneModel createLaneBinding() {
    return new DemandLaneModel();
  }

  @Override
  public final Form valueForm() {
    return this.valueForm;
  }

  @Override
  public  DemandLaneView valueForm(Form valueForm) {
    return new DemandLaneView(this.agentContext, valueForm, typesafeObservers(this.observers));
  }

  @Override
  public  DemandLaneView valueClass(Class valueClass) {
    return valueForm(Form.forClass(valueClass));
  }

  public void setValueForm(Form valueForm) {
    this.valueForm = valueForm;
  }

  protected Object typesafeObservers(Object observers) {
    // TODO: filter out OnCue
    return observers;
  }

  @Override
  public final boolean isSigned() {
    return false; // TODO
  }

  @Override
  public DemandLaneView isSigned(boolean isSigned) {
    return this; // TODO
  }

  @Override
  public void close() {
    this.laneBinding.closeLaneView(this);
  }

  @SuppressWarnings("unchecked")
  @Override
  public DemandLaneView observe(Object observer) {
    return (DemandLaneView) super.observe(observer);
  }

  @SuppressWarnings("unchecked")
  @Override
  public DemandLaneView unobserve(Object observer) {
    return (DemandLaneView) super.unobserve(observer);
  }

  @Override
  public DemandLaneView onCue(OnCue onCue) {
    return observe(onCue);
  }

  @Override
  public DemandLaneView willCommand(WillCommand willCommand) {
    return observe(willCommand);
  }

  @Override
  public DemandLaneView didCommand(DidCommand didCommand) {
    return observe(didCommand);
  }

  @Override
  public DemandLaneView willUplink(WillUplink willUplink) {
    return observe(willUplink);
  }

  @Override
  public DemandLaneView didUplink(DidUplink didUplink) {
    return observe(didUplink);
  }

  @Override
  public DemandLaneView willEnter(WillEnter willEnter) {
    return observe(willEnter);
  }

  @Override
  public DemandLaneView didEnter(DidEnter didEnter) {
    return observe(didEnter);
  }

  @Override
  public DemandLaneView willLeave(WillLeave willLeave) {
    return observe(willLeave);
  }

  @Override
  public DemandLaneView didLeave(DidLeave didLeave) {
    return observe(didLeave);
  }

  @Override
  public DemandLaneView decodeRequest(DecodeRequestHttp