// Copyright 2017 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 IOS_WEB_VIEW_PUBLIC_CWV_AUTOFILL_CONTROLLER_H_
#define IOS_WEB_VIEW_PUBLIC_CWV_AUTOFILL_CONTROLLER_H_

#import <Foundation/Foundation.h>

#import "cwv_export.h"

NS_ASSUME_NONNULL_BEGIN

@class CWVAutofillForm;
@class CWVAutofillSuggestion;
@protocol CWVAutofillControllerDelegate;

// Exposes features that allow autofilling html forms. May include autofilling
// of single fields, address forms, credit card forms, or password forms.
CWV_EXPORT
@interface CWVAutofillController : NSObject

// Delegate to receive autofill callbacks.
@property(nonatomic, weak, nullable) id<CWVAutofillControllerDelegate> delegate;

- (instancetype)init NS_UNAVAILABLE;

// Clears the fields that belong to the same autofill section as the field
// identified by |fieldIdentifier| in the form named |formName| in frame
// |frameID|.
// No-op if no such form can be found in the current page. If the field
// identified by |fieldIdentifier| cannot be found the entire form gets cleared.
// |fieldIdentifier| identifies the field that had focus. It is passed to
// CWVAutofillControllerDelegate and forwarded to this method.
// |completionHandler| will only be called on success.
- (void)clearFormWithName:(NSString*)formName
          fieldIdentifier:(NSString*)fieldIdentifier
                  frameID:(NSString*)frameID
        completionHandler:(nullable void (^)(void))completionHandler;

// For the field identified by |fieldIdentifier|, with type |fieldType| in the
// form named |formName|, fetches suggestions that can be used to autofill.
// No-op if no such form and field can be found in the current page.
// |fieldIdentifier| identifies the field that had focus. It is passed to
// CWVAutofillControllerDelegate and forwarded to this method.
// |fieldType| is the 'type' attribute of the html field.
// |frameID| is the ID of the web frame containing the form.
// |completionHandler| will only be called on success.
// Note: It will return password suggestions over profile/credit card
// suggestions.
- (void)fetchSuggestionsForFormWithName:(NSString*)formName
                        fieldIdentifier:(NSString*)fieldIdentifier
                              fieldType:(NSString*)fieldType
                                frameID:(NSString*)frameID
                      completionHandler:
                          (void (^)(NSArray<CWVAutofillSuggestion*>*))
                              completionHandler;

// Takes the |suggestion| and finds the form matching its |formName| and
// |fieldIdentifier| property and executes the appropriate action.
// If |suggestion| is a form suggestion, the form will be autofilled.
// Else, the |suggestions|'s action will be taken.
// No-op if no such form and field can be found in the current page.
// |completionHandler| will only be called on success.
- (void)acceptSuggestion:(CWVAutofillSuggestion*)suggestion
       completionHandler:(nullable void (^)(void))completionHandler;

// Changes focus to the previous sibling of the currently focused field.
// No-op if no field is currently focused or if previous field is not available.
- (void)focusPreviousField;

// Changes focus to the next sibling of the currently focused field.
// No-op if no field is currently focused or if next field is not available.
- (void)focusNextField;

// Checks if there are next or previous fields for focusing.
// |previous| and |next| indiciates if it is possible to focus.
- (void)checkIfPreviousAndNextFieldsAreAvailableForFocusWithCompletionHandler:
    (void (^)(BOOL previous, BOOL next))completionHandler;

@end

NS_ASSUME_NONNULL_END

#endif  // IOS_WEB_VIEW_PUBLIC_CWV_AUTOFILL_CONTROLLER_H_