// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TARGET_HANDLER_H_
#define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TARGET_HANDLER_H_

#include <map>
#include <set>

#include "content/browser/devtools/protocol/devtools_protocol_dispatcher.h"
#include "content/browser/devtools/service_worker_devtools_manager.h"
#include "content/public/browser/devtools_agent_host_client.h"
#include "content/public/browser/devtools_agent_host_observer.h"

namespace content {

class RenderFrameHostImpl;

namespace devtools {
namespace target {

class TargetHandler : public DevToolsAgentHostClient,
                      public ServiceWorkerDevToolsManager::Observer,
                      public DevToolsAgentHostObserver {
 public:
  using Response = DevToolsProtocolClient::Response;

  TargetHandler();
  ~TargetHandler() override;

  void SetRenderFrameHost(RenderFrameHostImpl* render_frame_host);
  void SetClient(std::unique_ptr<Client> client);
  void Detached();

  void UpdateServiceWorkers();
  void UpdateFrames();

  // Domain implementation.
  Response SetDiscoverTargets(bool discover);
  Response SetAutoAttach(bool auto_attach, bool wait_for_debugger_on_start);
  Response SetAttachToFrames(bool value);
  Response SetRemoteLocations(
      const std::vector<std::unique_ptr<base::DictionaryValue>>&);
  Response AttachToTarget(const std::string& target_id, bool* out_success);
  Response DetachFromTarget(const std::string& target_id);
  Response SendMessageToTarget(const std::string& target_id,
                               const std::string& message);
  Response GetTargetInfo(const std::string& target_id,
                         scoped_refptr<TargetInfo>* target_info);
  Response ActivateTarget(const std::string& target_id);
  Response CloseTarget(const std::string& target_id, bool* out_success);
  Response CreateBrowserContext(std::string* out_context_id);
  Response DisposeBrowserContext(const std::string& context_id,
                                 bool* out_success);
  Response CreateTarget(const std::string& url,
                        const int* width,
                        const int* height,
                        const std::string* context_id,
                        std::string* out_target_id);
  Response GetTargets(std::vector<scoped_refptr<TargetInfo>>* target_infos);

 private:
  using HostsMap = std::map<std::string, scoped_refptr<DevToolsAgentHost>>;
  using RawHostsMap = std::map<std::string, DevToolsAgentHost*>;

  void UpdateServiceWorkers(bool waiting_for_debugger);
  void ReattachTargetsOfType(const HostsMap& new_hosts,
                             const std::string& type,
                             bool waiting_for_debugger);
  void TargetCreatedInternal(DevToolsAgentHost* host);
  void TargetDestroyedInternal(DevToolsAgentHost* host);
  bool AttachToTargetInternal(DevToolsAgentHost* host,
                              bool waiting_for_debugger);
  void DetachFromTargetInternal(DevToolsAgentHost* host);

  // ServiceWorkerDevToolsManager::Observer implementation.
  void WorkerCreated(ServiceWorkerDevToolsAgentHost* host) override;
  void WorkerReadyForInspection(ServiceWorkerDevToolsAgentHost* host) override;
  void WorkerVersionInstalled(ServiceWorkerDevToolsAgentHost* host) override;
  void WorkerVersionDoomed(ServiceWorkerDevToolsAgentHost* host) override;
  void WorkerDestroyed(ServiceWorkerDevToolsAgentHost* host) override;

  // DevToolsAgentHostObserver implementation.
  bool ShouldForceDevToolsAgentHostCreation() override;
  void DevToolsAgentHostCreated(DevToolsAgentHost* agent_host) override;
  void DevToolsAgentHostDestroyed(DevToolsAgentHost* agent_host) override;

  // DevToolsAgentHostClient implementation.
  void DispatchProtocolMessage(DevToolsAgentHost* agent_host,
                               const std::string& message) override;
  void AgentHostClosed(DevToolsAgentHost* agent_host,
                       bool replaced_with_another_client) override;

  std::unique_ptr<Client> client_;
  bool discover_;
  bool auto_attach_;
  bool wait_for_debugger_on_start_;
  bool attach_to_frames_;
  RenderFrameHostImpl* render_frame_host_;
  HostsMap attached_hosts_;
  std::set<GURL> frame_urls_;
  RawHostsMap reported_hosts_;

  DISALLOW_COPY_AND_ASSIGN(TargetHandler);
};

}  // namespace target
}  // namespace devtools
}  // namespace content

#endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TARGET_HANDLER_H_