// Copyright (c) 2012 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.

#include "chrome/browser/extensions/api/app_window/app_window_api.h"

#include "apps/app_window.h"
#include "apps/app_window_contents.h"
#include "apps/app_window_registry.h"
#include "apps/ui/native_app_window.h"
#include "base/command_line.h"
#include "base/time/time.h"
#include "base/values.h"
#include "chrome/browser/app_mode/app_mode_utils.h"
#include "chrome/browser/devtools/devtools_window.h"
#include "chrome/browser/extensions/window_controller.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/apps/chrome_shell_window_delegate.h"
#include "chrome/common/extensions/api/app_window.h"
#include "chrome/common/extensions/features/feature_channel.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/url_constants.h"
#include "extensions/browser/extensions_browser_client.h"
#include "extensions/common/switches.h"
#include "ui/base/ui_base_types.h"
#include "ui/gfx/rect.h"
#include "url/gurl.h"

#if defined(USE_ASH)
#include "ash/shell.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#endif

using apps::AppWindow;

namespace app_window = extensions::api::app_window;
namespace Create = app_window::Create;

namespace extensions {

namespace app_window_constants {
const char kInvalidWindowId[] =
    "The window id can not be more than 256 characters long.";
}

const char kNoneFrameOption[] = "none";
const char kHtmlFrameOption[] = "experimental-html";

namespace {

// Opens an inspector window and delays the response to the
// AppWindowCreateFunction until the DevToolsWindow has finished loading, and is
// ready to stop on breakpoints in the callback.
class DevToolsRestorer : public base::RefCounted<DevToolsRestorer> {
 public:
  DevToolsRestorer(AppWindowCreateFunction* delayed_create_function,
                   content::RenderViewHost* created_view)
      : delayed_create_function_(delayed_create_function) {
    AddRef();  // Balanced in LoadCompleted.
    DevToolsWindow* devtools_window =
        DevToolsWindow::OpenDevToolsWindow(
            created_view,
            DevToolsToggleAction::ShowConsole());
    devtools_window->SetLoadCompletedCallback(
        base::Bind(&DevToolsRestorer::LoadCompleted, this));
  }

 private:
  friend class base::RefCounted<DevToolsRestorer>;
  ~DevToolsRestorer() {}

  void LoadCompleted() {
    delayed_create_function_->SendDelayedResponse();
    Release();
  }

  scoped_refptr<AppWindowCreateFunction> delayed_create_function_;
};

}  // namespace

void AppWindowCreateFunction::SendDelayedResponse() {
  SendResponse(true);
}

bool AppWindowCreateFunction::RunImpl() {
  // Don't create app window if the system is shutting down.
  if (extensions::ExtensionsBrowserClient::Get()->IsShuttingDown())
    return false;

  scoped_ptr<Create::Params> params(Create::Params::Create(*args_));
  EXTENSION_FUNCTION_VALIDATE(params.get());

  GURL url = GetExtension()->GetResourceURL(params->url);
  // Allow absolute URLs for component apps, otherwise prepend the extension
  // path.
  if (GetExtension()->location() == extensions::Manifest::COMPONENT) {
    GURL absolute = GURL(params->url);
    if (absolute.has_scheme())
      url = absolute;
  }

  bool inject_html_titlebar = false;

  // TODO(jeremya): figure out a way to pass the opening WebContents through to
  // AppWindow::Create so we can set the opener at create time rather than
  // with a hack in AppWindowCustomBindings::GetView().
  AppWindow::CreateParams create_params;
  app_window::CreateWindowOptions* options = params->options.get();
  if (options) {
    if (options->id.get()) {
      // TODO(mek): use URL if no id specified?
      // Limit length of id to 256 characters.
      if (options->id->length() > 256) {
        error_ = app_window_constants::kInvalidWindowId;
        return false;
      }

      create_params.window_key = *options->id;

      if (options->singleton && *options->singleton == false) {
        WriteToConsole(
          content::CONSOLE_MESSAGE_LEVEL_WARNING,
          "The 'singleton' option in chrome.apps.window.create() is deprecated!"
          " Change your code to no longer rely on this.");
      }

      if (!options->singleton || *options->singleton) {
        AppWindow* window = apps::AppWindowRegistry::Get(GetProfile())
                                ->GetAppWindowForAppAndKey(
                                      extension_id(), create_params.window_key);
        if (window) {
          content::RenderViewHost* created_view =
              window->web_contents()->GetRenderViewHost();
          int view_id = MSG_ROUTING_NONE;
          if (render_view_host_->GetProcess()->GetID() ==
              created_view->GetProcess()->GetID()) {
            view_id = created_view->GetRoutingID();
          }

          if (options->focused.get() && !*options->focused.get())
            window->Show(AppWindow::SHOW_INACTIVE);
          else
            window->Show(AppWindow::SHOW_ACTIVE);

          base::DictionaryValue* result = new base::DictionaryValue;
          result->Set("viewId", new base::FundamentalValue(view_id));
          window->GetSerializedState(result);
          result->SetBoolean("existingWindow", true);
          result->SetBoolean("injectTitlebar", false);
          SetResult(result);
          SendResponse(true);
          return true;
        }
      }
    }

    // TODO(jeremya): remove these, since they do the same thing as
    // left/top/width/height.
    if (options->default_width.get())
      create_params.bounds.set_width(*options->default_width.get());
    if (options->default_height.get())
      create_params.bounds.set_height(*options->default_height.get());
    if (options->default_left.get())
      create_params.bounds.set_x(*options->default_left.get());
    if (options->default_top.get())
      create_params.bounds.set_y(*options->default_top.get());

    if (options->width.get())
      create_params.bounds.set_width(*options->width.get());
    if (options->height.get())
      create_params.bounds.set_height(*options->height.get());
    if (options->left.get())
      create_params.bounds.set_x(*options->left.get());
    if (options->top.get())
      create_params.bounds.set_y(*options->top.get());

    if (options->bounds.get()) {
      app_window::Bounds* bounds = options->bounds.get();
      if (bounds->width.get())
        create_params.bounds.set_width(*bounds->width.get());
      if (bounds->height.get())
        create_params.bounds.set_height(*bounds->height.get());
      if (bounds->left.get())
        create_params.bounds.set_x(*bounds->left.get());
      if (bounds->top.get())
        create_params.bounds.set_y(*bounds->top.get());
    }

    if (GetCurrentChannel() <= chrome::VersionInfo::CHANNEL_DEV ||
        GetExtension()->location() == extensions::Manifest::COMPONENT) {
      if (options->type == extensions::api::app_window::WINDOW_TYPE_PANEL) {
        create_params.window_type = AppWindow::WINDOW_TYPE_PANEL;
      }
    }

    if (options->frame.get()) {
      if (*options->frame == kHtmlFrameOption &&
          (GetExtension()->HasAPIPermission(APIPermission::kExperimental) ||
           CommandLine::ForCurrentProcess()->HasSwitch(
               switches::kEnableExperimentalExtensionApis))) {
        create_params.frame = AppWindow::FRAME_NONE;
        inject_html_titlebar = true;
      } else if (*options->frame == kNoneFrameOption) {
        create_params.frame = AppWindow::FRAME_NONE;
      } else {
        create_params.frame = AppWindow::FRAME_CHROME;
      }
    }

    if (options->transparent_background.get() &&
        (GetExtension()->HasAPIPermission(APIPermission::kExperimental) ||
         CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kEnableExperimentalExtensionApis))) {
      create_params.transparent_background = *options->transparent_background;
    }

    gfx::Size& minimum_size = create_params.minimum_size;
    if (options->min_width.get())
      minimum_size.set_width(*options->min_width);
    if (options->min_height.get())
      minimum_size.set_height(*options->min_height);
    gfx::Size& maximum_size = create_params.maximum_size;
    if (options->max_width.get())
      maximum_size.set_width(*options->max_width);
    if (options->max_height.get())
      maximum_size.set_height(*options->max_height);

    if (options->hidden.get())
      create_params.hidden = *options->hidden.get();

    if (options->resizable.get())
      create_params.resizable = *options->resizable.get();

    if (options->always_on_top.get() &&
        GetExtension()->HasAPIPermission(APIPermission::kAlwaysOnTopWindows))
      create_params.always_on_top = *options->always_on_top.get();

    if (options->focused.get())
      create_params.focused = *options->focused.get();

    if (options->type != extensions::api::app_window::WINDOW_TYPE_PANEL) {
      switch (options->state) {
        case extensions::api::app_window::STATE_NONE:
        case extensions::api::app_window::STATE_NORMAL:
          break;
        case extensions::api::app_window::STATE_FULLSCREEN:
          create_params.state = ui::SHOW_STATE_FULLSCREEN;
          break;
        case extensions::api::app_window::STATE_MAXIMIZED:
          create_params.state = ui::SHOW_STATE_MAXIMIZED;
          break;
        case extensions::api::app_window::STATE_MINIMIZED:
          create_params.state = ui::SHOW_STATE_MINIMIZED;
          break;
      }
    }
  }

  create_params.creator_process_id =
      render_view_host_->GetProcess()->GetID();

  AppWindow* app_window = new AppWindow(
      GetProfile(), new ChromeShellWindowDelegate(), GetExtension());
  app_window->Init(
      url, new apps::AppWindowContentsImpl(app_window), create_params);

  if (chrome::IsRunningInForcedAppMode())
    app_window->ForcedFullscreen();

  content::RenderViewHost* created_view =
      app_window->web_contents()->GetRenderViewHost();
  int view_id = MSG_ROUTING_NONE;
  if (create_params.creator_process_id == created_view->GetProcess()->GetID())
    view_id = created_view->GetRoutingID();

  base::DictionaryValue* result = new base::DictionaryValue;
  result->Set("viewId", new base::FundamentalValue(view_id));
  result->Set("injectTitlebar",
      new base::FundamentalValue(inject_html_titlebar));
  result->Set("id", new base::StringValue(app_window->window_key()));
  app_window->GetSerializedState(result);
  SetResult(result);

  if (apps::AppWindowRegistry::Get(GetProfile())
          ->HadDevToolsAttached(created_view)) {
    new DevToolsRestorer(this, created_view);
    return true;
  }

  SendResponse(true);
  return true;
}

}  // namespace extensions