/*
 Copyright 2015 OpenMarket Ltd
 Copyright 2017 Vector Creations 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 "MatrixKit.h"

#import "PublicRoomsDirectoryDataSource.h"

@protocol RecentsListServiceProtocol;
@class DiscussionsCount;
@class MXSpace;
@class RecentsDataSourceSections;

/**
 List the different modes used to prepare the recents data source.
 Each mode corresponds to an application tab: Home, Favourites, People and Rooms.
 Used as the tag of UITableView, starting from 1 in order to avoid collision with default tag of UIView.
 */
typedef NS_ENUM(NSInteger, RecentsDataSourceMode)
{
    RecentsDataSourceModeHome = 1,
    RecentsDataSourceModeFavourites,
    RecentsDataSourceModePeople,
    RecentsDataSourceModeRooms,
    RecentsDataSourceModeRoomInvites,
    RecentsDataSourceModeAllChats
};

/**
 List the different secure backup banners that could be displayed.
 */
typedef NS_ENUM(NSInteger, SecureBackupBannerDisplay)
{
    SecureBackupBannerDisplayNone,
    SecureBackupBannerDisplaySetup    
};

/**
 List the different cross-signing banners that could be displayed.
 */
typedef NS_ENUM(NSInteger, CrossSigningBannerDisplay)
{
    CrossSigningBannerDisplayNone,
    CrossSigningBannerDisplaySetup
};

/**
 Action identifier used when the user tapped on the directory change button.

 The `userInfo` is nil.
 */
extern NSString *const kRecentsDataSourceTapOnDirectoryServerChange;

/**
 'RecentsDataSource' class inherits from 'MXKInterleavedRecentsDataSource' to define the Riot recents source
 shared between all the applications tabs.
 */
@interface RecentsDataSource : MXKInterleavedRecentsDataSource

/**
 A set of sections visible in the current table view and associated with their semantic meaning (e.g. "favorites" = 2)
 */
@property (nonatomic, strong, readonly) RecentsDataSourceSections *sections;

@property (nonatomic, readonly) NSInteger totalVisibleItemCount;

/**
 Counts for favorited rooms.
 */
@property (nonatomic, readonly) DiscussionsCount *favoriteMissedDiscussionsCount;

/**
 Counts for direct rooms.
 */
@property (nonatomic, readonly) DiscussionsCount *directMissedDiscussionsCount;

/**
 Counts for group rooms.
 */
@property (nonatomic, readonly) DiscussionsCount *groupMissedDiscussionsCount;

@property (nonatomic, readonly) SecureBackupBannerDisplay secureBackupBannerDisplay;
@property (nonatomic, readonly) CrossSigningBannerDisplay crossSigningBannerDisplay;

@property (nonatomic, readonly) id<RecentsListServiceProtocol> recentsListService;

+ (instancetype)new NS_UNAVAILABLE;
- (instancetype)init NS_UNAVAILABLE;
- (instancetype)initWithMatrixSession:(MXSession*)mxSession NS_UNAVAILABLE;

/**
 Initializer
 @param mxSession session instance
 @param recentsListService service instance
 */
- (instancetype)initWithMatrixSession:(MXSession*)mxSession
                   recentsListService:(id<RecentsListServiceProtocol>)recentsListService;

/**
 Set the delegate by specifying the selected display mode.
 */
- (void)setDelegate:(id<MXKDataSourceDelegate>)delegate andRecentsDataSourceMode:(RecentsDataSourceMode)recentsDataSourceMode;

/**
 The current mode (RecentsDataSourceModeHome by default).
 */
@property (nonatomic, readonly) RecentsDataSourceMode recentsDataSourceMode;

/**
 The data source used to manage the rooms from directory.
 */
@property (nonatomic) PublicRoomsDirectoryDataSource *publicRoomsDirectoryDataSource;

/**
 Make a new sections object that reflects the latest state of the data sources
 */
- (RecentsDataSourceSections *)makeDataSourceSections;

/**
 Refresh the recents data source and notify its delegate.
 */
- (void)forceRefresh;

/**
 Tell whether the sections are shrinkable. YES by default.
 */
@property (nonatomic) BOOL areSectionsShrinkable;

/**
 Return true if the given section is currently shrinked.
 */
- (BOOL)isSectionShrinkedAt:(NSInteger)section;

/**
 Get the sticky header view for the specified section.
 
 @param section the section  index
 @param frame the drawing area for the header of the specified section.
 @param tableView the table view
 @return the sticky header view.
 */
- (UIView *)viewForStickyHeaderInSection:(NSInteger)section withFrame:(CGRect)frame inTableView:(UITableView*)tableView;

/**
 Get the height of the section header view.

 @param section the section  index
 @return the header height.
 */
- (CGFloat)heightForHeaderInSection:(NSInteger)section;

#pragma mark - Drag & Drop handling
/**
 Return true of the cell can be moved from a section to another one.
 */
- (BOOL)isDraggableCellAt:(NSIndexPath*)path;

/**
 Return true of the cell can be moved from a section to another one.
 */
- (BOOL)canCellMoveFrom:(NSIndexPath*)oldPath to:(NSIndexPath*)newPath;

/**
 There is a pending drag and drop cell.
 It defines its path of the source cell.
 */
@property (nonatomic) NSIndexPath* hiddenCellIndexPath;

/**
 There is a pending drag and drop cell.
 It defines its path of the destination cell.
 */
@property (nonatomic) NSIndexPath* droppingCellIndexPath;

/**
 The movingCellBackgroundImage.
 */
@property (nonatomic) UIImageView* droppingCellBackGroundView;

/**
 Paginate in the given section. Results will be notified from delegate methods.
 
 @param section section index to be paginated
 */
- (void)paginateInSection:(NSInteger)section;

/**
 Move a cell from a path to another one.
 It is based on room Tag.
 */
- (void)moveRoomCell:(MXRoom*)room from:(NSIndexPath*)oldPath to:(NSIndexPath*)newPath success:(void (^)(void))moveSuccess failure:(void (^)(NSError *error))moveFailure;

@end