// Copyright 2015 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 HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_IMPL_H_
#define HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_IMPL_H_

#include "headless/public/headless_browser.h"

#include <memory>
#include <string>
#include <unordered_map>
#include <vector>

#include "base/memory/weak_ptr.h"
#include "headless/lib/browser/headless_devtools_manager_delegate.h"
#include "headless/lib/browser/headless_web_contents_impl.h"

namespace aura {
class WindowTreeHost;

namespace client {
class WindowParentingClient;
}
}

namespace headless {

class HeadlessBrowserContextImpl;
class HeadlessBrowserMainParts;

class HeadlessBrowserImpl : public HeadlessBrowser {
 public:
  HeadlessBrowserImpl(
      const base::Callback<void(HeadlessBrowser*)>& on_start_callback,
      HeadlessBrowser::Options options);
  ~HeadlessBrowserImpl() override;

  // HeadlessBrowser implementation:
  HeadlessBrowserContext::Builder CreateBrowserContextBuilder() override;
  scoped_refptr<base::SingleThreadTaskRunner> BrowserFileThread()
      const override;
  scoped_refptr<base::SingleThreadTaskRunner> BrowserIOThread() const override;
  scoped_refptr<base::SingleThreadTaskRunner> BrowserMainThread()
      const override;

  void Shutdown() override;

  std::vector<HeadlessBrowserContext*> GetAllBrowserContexts() override;
  HeadlessWebContents* GetWebContentsForDevToolsAgentHostId(
      const std::string& devtools_agent_host_id) override;
  HeadlessBrowserContext* GetBrowserContextForId(
      const std::string& id) override;

  void set_browser_main_parts(HeadlessBrowserMainParts* browser_main_parts);
  HeadlessBrowserMainParts* browser_main_parts() const;

  void RunOnStartCallback();

  HeadlessBrowser::Options* options() { return &options_; }

  HeadlessBrowserContext* CreateBrowserContext(
      HeadlessBrowserContext::Builder* builder);
  // Close given |browser_context| and delete it
  // (all web contents associated with it go away too).
  void DestroyBrowserContext(HeadlessBrowserContextImpl* browser_context);

  base::WeakPtr<HeadlessBrowserImpl> GetWeakPtr();

  aura::WindowTreeHost* window_tree_host() const;

 protected:
  base::Callback<void(HeadlessBrowser*)> on_start_callback_;
  HeadlessBrowser::Options options_;
  HeadlessBrowserMainParts* browser_main_parts_;  // Not owned.

  // TODO(eseckler): Currently one window and one window_tree_host
  // is used for all web contents. We should probably use one
  // window per web contents, but additional investigation is needed.
  std::unique_ptr<aura::WindowTreeHost> window_tree_host_;
  std::unique_ptr<aura::client::WindowParentingClient> window_parenting_client_;

  std::unordered_map<std::string, std::unique_ptr<HeadlessBrowserContextImpl>>
      browser_contexts_;

  base::WeakPtrFactory<HeadlessBrowserImpl> weak_ptr_factory_;

 private:
  DISALLOW_COPY_AND_ASSIGN(HeadlessBrowserImpl);
};

}  // namespace headless

#endif  // HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_IMPL_H_