// 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.

#ifndef CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_CONTROLLER_H_
#define CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_CONTROLLER_H_

#include <vector>

#include "base/string16.h"
#include "chrome/browser/ui/autofill/autofill_dialog_types.h"
#include "components/autofill/browser/field_types.h"
#include "components/autofill/browser/wallet/required_action.h"
#include "ui/base/range/range.h"
#include "ui/base/ui_base_types.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/native_widget_types.h"

class Profile;

namespace content {
class WebContents;
struct NativeWebKeyboardEvent;
}

namespace gfx {
class Rect;
}

namespace ui {
class ComboboxModel;
class MenuModel;
}

namespace autofill {

// This class defines the interface to the controller that the dialog view sees.
class AutofillDialogController {
 public:
  enum ValidationType {
    VALIDATE_EDIT,   // validate user edits. Allow for empty fields.
    VALIDATE_FINAL,  // Full form validation. Mandatory fields can't be empty.
  };

  // Strings -------------------------------------------------------------------

  virtual string16 DialogTitle() const = 0;
  virtual string16 AccountChooserText() const = 0;
  virtual string16 SignInLinkText() const = 0;
  virtual string16 EditSuggestionText() const = 0;
  virtual string16 CancelButtonText() const = 0;
  virtual string16 ConfirmButtonText() const = 0;
  virtual string16 SaveLocallyText() const = 0;
  virtual string16 ProgressBarText() const = 0;
  virtual string16 LegalDocumentsText() = 0;

  // State ---------------------------------------------------------------------

  // Whether the user is known to be signed in.
  virtual DialogSignedInState SignedInState() const = 0;

  // Whether the dialog is in a not exactly well-defined state
  // (while attempting to sign-in or retrieving the wallet data etc).
  virtual bool ShouldShowSpinner() const = 0;

  // Whether to show the checkbox to save data locally (in Autofill).
  virtual bool ShouldOfferToSaveInChrome() const = 0;

  // Returns the model for the account chooser. It will return NULL if the
  // account chooser should not show a menu. In this case, clicking on the
  // account chooser should initiate sign-in.
  virtual ui::MenuModel* MenuModelForAccountChooser() = 0;

  // Returns the icon that should be shown in the account chooser.
  virtual gfx::Image AccountChooserImage() = 0;

  // Whether or not the details container should be showing currently.
  virtual bool ShouldShowDetailArea() const = 0;

  // Whether or not the progress bar in the button strip should be showing.
  virtual bool ShouldShowProgressBar() const = 0;

  // Whether or not the |button| should be enabled.
  virtual bool IsDialogButtonEnabled(ui::DialogButton button) const = 0;

  // Returns ranges to linkify in the text returned by |LegalDocumentsText()|.
  virtual const std::vector<ui::Range>& LegalDocumentLinks() = 0;

  // Detail inputs -------------------------------------------------------------

  // Whether the section is currently active (i.e. should be shown).
  virtual bool SectionIsActive(DialogSection section) const = 0;

  // Returns the set of inputs the page has requested which fall under
  // |section|.
  virtual const DetailInputs& RequestedFieldsForSection(DialogSection section)
      const = 0;

  // Returns the combobox model for inputs of type |type|, or NULL if the input
  // should be a text field.
  virtual ui::ComboboxModel* ComboboxModelForAutofillType(
      AutofillFieldType type) = 0;

  // Returns the model for suggestions for fields that fall under |section|.
  // This may return NULL, in which case no menu should be shown for that
  // section.
  virtual ui::MenuModel* MenuModelForSection(DialogSection section) = 0;

#if defined(OS_ANDROID)
  // As the above, but will never return NULL. TODO(estade): android should
  // stop relying on this and it should be removed.
  virtual ui::MenuModel* MenuModelForSectionHack(DialogSection section) = 0;
#endif

  // Returns the label text used to describe the section (i.e. Billing).
  virtual string16 LabelForSection(DialogSection section) const = 0;

  // Returns the current state of suggestions for |section|.
  virtual SuggestionState SuggestionStateForSection(DialogSection section) = 0;

  // Should be called when the user starts editing of the section.
  virtual void EditClickedForSection(DialogSection section) = 0;

  // Should be called when the user cancels editing of the section.
  virtual void EditCancelledForSection(DialogSection section) = 0;

  // Returns an icon to be displayed along with the input for the given type.
  // |user_input| is the current text in the textfield.
  virtual gfx::Image IconForField(AutofillFieldType type,
                                  const string16& user_input) const = 0;

  // Decides whether input of |value| is valid for a field of type |type|. If
  // valid, the returned string will be empty. Otherwise it will contain an
  // error message.
  virtual string16 InputValidityMessage(AutofillFieldType type,
                                        const string16& value) const = 0;


  // Decides whether the combination of all |inputs| is valid, returns a
  // map of field types to error strings.
  virtual ValidityData InputsAreValid(
      const DetailOutputMap& inputs, ValidationType validation_type) const = 0;

  // Called when the user changes the contents of a text field or activates it
  // (by focusing and then clicking it). |was_edit| is true when the function
  // was called in response to the user editing the text field.
  virtual void UserEditedOrActivatedInput(const DetailInput* input,
                                          gfx::NativeView parent_view,
                                          const gfx::Rect& content_bounds,
                                          const string16& field_contents,
                                          bool was_edit) = 0;

  // The view forwards keypresses in text inputs. Returns true if there should
  // be no further processing of the event.
  virtual bool HandleKeyPressEventInInput(
      const content::NativeWebKeyboardEvent& event) = 0;

  // Called when focus has changed position within the view.
  virtual void FocusMoved() = 0;

  // Miscellany ----------------------------------------------------------------

  // Called when the view has been closed.
  virtual void ViewClosed() = 0;

  // Returns dialog notifications that the view should currently be showing in
  // order from top to bottom.
  virtual std::vector<DialogNotification> CurrentNotifications() const = 0;

  // Begins or aborts the flow to sign into Wallet.
  virtual void SignInLinkClicked() = 0;

  // Called when a checkbox in the notification area has changed its state.
  virtual void NotificationCheckboxStateChanged(DialogNotification::Type type,
                                                bool checked) = 0;

  // A legal document link has been clicked.
  virtual void LegalDocumentLinkClicked(const ui::Range& range) = 0;

  // Called when the view has been cancelled.
  virtual void OnCancel() = 0;

  // Called when the view has been accepted. This could be to submit the payment
  // info or to handle a required action.
  virtual void OnAccept() = 0;

  // Returns the profile for this dialog.
  virtual Profile* profile() = 0;

  // The web contents that prompted the dialog.
  virtual content::WebContents* web_contents() = 0;

 protected:
  virtual ~AutofillDialogController();
};

}  // namespace autofill

#endif  // CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_CONTROLLER_H_