/*
 Copyright 2017 Vector Creations Ltd
 Copyright 2019 New Vector Ltd

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

#import <Foundation/Foundation.h>

#import <MatrixSDK/MatrixSDK.h>

#import "Widget.h"
#import "WidgetConstants.h"

@class WidgetManagerConfig;

/**
 Posted when a widget has been created, updated or disabled.
 The notification object is the `Widget` instance.
 */
FOUNDATION_EXPORT NSString *const kWidgetManagerDidUpdateWidgetNotification;

/**
 `WidgetManager` NSError domain and codes.
 */
FOUNDATION_EXPORT NSString *const WidgetManagerErrorDomain;

typedef enum : NSUInteger
{
    WidgetManagerErrorCodeNotEnoughPower,
    WidgetManagerErrorCodeCreationFailed,
    WidgetManagerErrorCodeNoIntegrationsServerConfigured,
    WidgetManagerErrorCodeDisabledIntegrationsServer,
    WidgetManagerErrorCodeFailedToConnectToIntegrationsServer,
    WidgetManagerErrorCodeTermsNotSigned
}
WidgetManagerErrorCode;

FOUNDATION_EXPORT NSString *const WidgetManagerErrorOpenIdTokenKey;

/**
 The `WidgetManager` helps to handle modular widgets.
 */
@interface WidgetManager : NSObject

/**
 Returns the shared widget manager.

 @return the shared widget manager.
 */
+ (instancetype)sharedManager;

/**
 List all active widgets in a room.
 
 @param room the room to check.
 @return a list of widgets.
 */
- (NSArray<Widget*> *)widgetsInRoom:(MXRoom*)room withRoomState:(MXRoomState*)roomState;

/**
 List all active widgets of a given type in a room.

 @param widgetTypes the types of widget to search. Nil means all types.
 @param room the room to check.
 @return a list of widgets.
 */
- (NSArray<Widget*> *)widgetsOfTypes:(NSArray<NSString*>*)widgetTypes inRoom:(MXRoom*)room withRoomState:(MXRoomState*)roomState;

/**
 List all active widgets of a given type in a room, excluding some types.

 @param notWidgetTypes the types of widget to not consider. Nil means all types.
 @param room the room to check.
 @return a list of widgets.
 */
- (NSArray<Widget*> *)widgetsNotOfTypes:(NSArray<NSString*>*)notWidgetTypes inRoom:(MXRoom*)room withRoomState:(MXRoomState*)roomState;

/**
 List all widgets of an account.

 @param mxSession the session of the user account.
 @return a list of widgets.
 */
- (NSArray<Widget*> *)userWidgets:(MXSession*)mxSession;

/**
 List all widgets of a given type of an account.

 @param mxSession the session of the user account.
 @param widgetTypes the types of widget to search. Nil means all types.
 @return a list of widgets.
 */
- (NSArray<Widget*> *)userWidgets:(MXSession*)mxSession ofTypes:(NSArray<NSString*>*)widgetTypes;

/**
 Add a modular widget to a room.

 @param widgetId the id of the widget.
 @param widgetContent the widget content.
 @param room the room to create the widget to.

 @param success A block object called when the operation succeeds. It provides the newly added widget.
 @param failure A block object called when the operation fails.

 @return a MXHTTPOperation instance.
 */
- (MXHTTPOperation *)createWidget:(NSString*)widgetId
                      withContent:(NSDictionary<NSString*, NSObject*>*)widgetContent
                           inRoom:(MXRoom*)room
                          success:(void (^)(Widget *widget))success
                          failure:(void (^)(NSError *error))failure;

/**
 Add a jitsi conference widget to a room.

 @param room the room to create the widget to.
 @param video the conference type

 @param success A block object called when the operation succeeds. It provides the newly added widget.
 @param failure A block object called when the operation fails.

 @return a MXHTTPOperation instance.
 */
- (MXHTTPOperation *)createJitsiWidgetInRoom:(MXRoom*)room
                                   withVideo:(BOOL)video
                                     success:(void (^)(Widget *jitsiWidget))success
                                     failure:(void (^)(NSError *error))failure;

/**
 Close/Disable a widget in a room.

 @param widgetId the id of the widget to close.
 @param room the room the widget is in.

 @param success A block object called when the operation succeeds.
 @param failure A block object called when the operation fails.

 @return a MXHTTPOperation instance.
 */
- (MXHTTPOperation *)closeWidget:(NSString*)widgetId inRoom:(MXRoom*)room
                         success:(void (^)(void))success
                         failure:(void (^)(NSError *error))failure;


/**
 Add/remove matrix session.
 
 Registering session allows to generate `kWidgetManagerDidUpdateWidgetNotification` notifications.
 
 @param mxSession the session to add/remove.
 */
- (void)addMatrixSession:(MXSession*)mxSession;
- (void)removeMatrixSession:(MXSession*)mxSession;

/**
 Delete the data associated with an user.
 
@param userId the id of the user.
 */
- (void)deleteDataForUser:(NSString*)userId;

#pragma mark - Modular interface

/**
 Get the integration manager configuration for a user.

 @param userId the user id.
 @return the integration manager configuration.
 */
- (WidgetManagerConfig*)configForUser:(NSString*)userId;

/**
 Store the integration manager configuration for a user.

 @param the integration manager configuration.
 @param userId the user id.
 */
- (void)setConfig:(WidgetManagerConfig*)config forUser:(NSString*)userId;

/**
 Check if the user has URLs for an integration manager configured.

 @param userId the user id.
 @return YES if they have URLs for an integration manager.
 */
- (BOOL)hasIntegrationManagerForUser:(NSString*)userId;

/**
 Make sure there is a scalar token for the given Matrix session.
 
 If no token was gotten and stored before, the operation will make http requests
 to get one.

 @param mxSession the session to check.
 @param validate if it is cached, check its validity on the scalar server.
 
 @param success A block object called when the operation succeeds.
 @param failure A block object called when the operation fails.
 */
- (MXHTTPOperation *)getScalarTokenForMXSession:(MXSession*)mxSession
                                       validate:(BOOL)validate
                                        success:(void (^)(NSString *scalarToken))success
                                        failure:(void (^)(NSError *error))failure;

/**
 Returns true if specified url is a scalar URL, typically https://scalar.vector.im/api

 @param urlString the URL to check.
 @param userId the user id.
 @return YES if specified URL is a scalar URL.
 */
- (BOOL)isScalarUrl:(NSString*)urlString forUser:(NSString*)userId;

@end