/*
 Copyright 2014 OpenMarket 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 "RoomViewController.h"

#import "MXKRoomBubbleTableViewCell.h"

#import "AppDelegate.h"

#import "RageShakeManager.h"

@interface RoomViewController ()
{
    // Members list
    id membersListener;
    
    // Voip call options
    UIButton *voipVoiceCallButton;
    UIButton *voipVideoCallButton;
    UIBarButtonItem *voipVoiceCallBarButtonItem;
    UIBarButtonItem *voipVideoCallBarButtonItem;
    
    // the user taps on a member thumbnail
    MXRoomMember *selectedRoomMember;
}

@property (strong, nonatomic) IBOutlet UIBarButtonItem *showRoomMembersButtonItem;

@property (strong, nonatomic) MXKAlert *actionMenu;

@end

@implementation RoomViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // Set room title view
    [self setRoomTitleViewClass:MXKRoomTitleViewWithTopic.class];
    
    // Replace the default input toolbar view with the one based on `HPGrowingTextView`.
    [self setRoomInputToolbarViewClass:MXKRoomInputToolbarViewWithHPGrowingText.class];
    
    // Set rageShake handler
    self.rageShakeManager = [RageShakeManager sharedManager];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    
    // hide action
    if (self.actionMenu)
    {
        [self.actionMenu dismiss:NO];
        self.actionMenu = nil;
    }
    
    if (self.roomDataSource)
    {
        if (membersListener)
        {
            [self.roomDataSource.room removeListener:membersListener];
            membersListener = nil;
        }
    }
}

- (void)viewDidAppear:(BOOL)animated
{
    if (self.childViewControllers)
    {
        // Dispose data source defined for room member list view controller (if any)
        for (id childViewController in self.childViewControllers)
        {
            if ([childViewController isKindOfClass:[MXKRoomMemberListViewController class]])
            {
                MXKRoomMemberListViewController *viewController = (MXKRoomMemberListViewController*)childViewController;
                MXKDataSource *dataSource = [viewController dataSource];
                [viewController destroy];
                [dataSource destroy];
            }
        }
    }
    
    [super viewDidAppear:animated];
    
    if (self.roomDataSource)
    {
        // Set visible room id
        [AppDelegate theDelegate].masterTabBarController.visibleRoomId = self.roomDataSource.roomId;
    }
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    
    // Reset visible room id
    [AppDelegate theDelegate].masterTabBarController.visibleRoomId = nil;
}

#pragma mark - Override MXKRoomViewController

- (void)displayRoom:(MXKRoomDataSource *)dataSource
{
    // Remove members listener (if any) before changing dataSource.
    if (membersListener)
    {
        [self.roomDataSource.room removeListener:membersListener];
        membersListener = nil;
    }
    
    [super displayRoom:dataSource];
}

- (void)onMatrixSessionChange
{
    [super onMatrixSessionChange];
    
    // Check dataSource state
    if (self.roomDataSource && self.roomDataSource.state == MXKDataSourceStatePreparing)
    {
        // dataSource is not ready, keep running the loading wheel
        [self.activityIndicator startAnimating];
    }
}

- (void)updateViewControllerAppearanceOnRoomDataSourceState
{
    [super updateViewControllerAppearanceOnRoomDataSourceState];
    
    // Update UI by considering dataSource state
    if (self.roomDataSource && self.roomDataSource.state == MXKDataSourceStateReady)
    {
        // Register a listener for events that concern room members
        if (!membersListener)
        {
            membersListener = [self.roomDataSource.room listenToEventsOfTypes:@[kMXEventTypeStringRoomMember] onEvent:^(MXEvent *event, MXEventDirection direction, id customObject) {
                
                // Consider only live event
                if (direction == MXEventDirectionForwards)
                {
                    // Update navigation bar items
                    [self updateNavigationBarButtonItems];
                }
            }];
        }
    }
    else
    {
        // Remove members listener if any.
        if (membersListener)
        {
            [self.roomDataSource.room removeListener:membersListener];
            membersListener = nil;
        }
    }
    
    // Update navigation bar items
    [self updateNavigationBarButtonItems];
}

- (BOOL)isIRCStyleCommand:(NSString*)string
{
    // Override the default behavior for `/join` command in order to open automatically the joined room
    
    if ([string hasPrefix:kCmdJoinRoom])
    {
        // Join a room
        NSString *roomAlias = [string substringFromIndex:kCmdJoinRoom.length + 1];
        // Remove white space from both ends
        roomAlias = [roomAlias stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
        
        // Check
        if (roomAlias.length)
        {
            [self.mainSession joinRoom:roomAlias success:^(MXRoom *room)
             {
                 // Show the room
                 [[AppDelegate theDelegate].masterTabBarController showRoom:room.state.roomId withMatrixSession:self.mainSession];
             } failure:^(NSError *error)
             {
                 NSLog(@"[Console RoomVC] Join roomAlias (%@) failed: %@", roomAlias, error);
                 //Alert user
                 [[AppDelegate theDelegate] showErrorAsAlert:error];
             }];
        }
        else
        {
            // Display cmd usage in text input as placeholder
            self.inputToolbarView.placeholder = @"Usage: /join <room_alias>";
        }
        return YES;
    }
    return [super isIRCStyleCommand:string];
}

- (void)destroy
{
    if (membersListener)
    {
        [self.roomDataSource.room removeListener:membersListener];
        membersListener = nil;
    }
    
    if (self.actionMenu)
    {
        [self.actionMenu dismiss:NO];
        self.actionMenu = nil;
    }
    
    [super destroy];
}

#pragma mark -

- (void)updateNavigationBarButtonItems
{
    // Update navigation bar buttons according to room members count
    if (self.roomDataSource && self.roomDataSource.state == MXKDataSourceStateReady)
    {
        if (self.roomDataSource.room.state.members.count == 2)
        {
            if (!voipVoiceCallBarButtonItem || !voipVideoCallBarButtonItem)
            {
                voipVoiceCallButton = [UIButton buttonWithType:UIButtonTypeCustom];
                voipVoiceCallButton.frame = CGRectMake(0, 0, 36, 36);
                UIImage *voiceImage = [UIImage imageNamed:@"voice"];
                [voipVoiceCallButton setImage:voiceImage forState:UIControlStateNormal];
                [voipVoiceCallButton setImage:voiceImage forState:UIControlStateHighlighted];
                [voipVoiceCallButton addTarget:self action:@selector(onButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
                voipVoiceCallBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:voipVoiceCallButton];
                
                voipVideoCallButton = [UIButton buttonWithType:UIButtonTypeCustom];
                voipVideoCallButton.frame = CGRectMake(0, 0, 36, 36);
                UIImage *videoImage = [UIImage imageNamed:@"video"];
                [voipVideoCallButton setImage:videoImage forState:UIControlStateNormal];
                [voipVideoCallButton setImage:videoImage forState:UIControlStateHighlighted];
                [voipVideoCallButton addTarget:self action:@selector(onButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
                voipVideoCallBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:voipVideoCallButton];
            }
            
            _showRoomMembersButtonItem.enabled = YES;
            
            self.navigationItem.rightBarButtonItems = @[_showRoomMembersButtonItem, voipVideoCallBarButtonItem, voipVoiceCallBarButtonItem];
        }
        else
        {
            _showRoomMembersButtonItem.enabled = ([self.roomDataSource.room.state members].count != 0);
            self.navigationItem.rightBarButtonItems = @[_showRoomMembersButtonItem];
        }
    }
    else
    {
        _showRoomMembersButtonItem.enabled = NO;
        self.navigationItem.rightBarButtonItems = @[_showRoomMembersButtonItem];
    }
}

#pragma mark - MXKDataSource delegate

- (void)dataSource:(MXKDataSource *)dataSource didRecognizeAction:(NSString *)actionIdentifier inCell:(id<MXKCellRendering>)cell userInfo:(NSDictionary *)userInfo
{
    // Override default implementation in case of tap on avatar
    if ([actionIdentifier isEqualToString:kMXKRoomBubbleCellTapOnAvatarView])
    {
        selectedRoomMember = [self.roomDataSource.room.state memberWithUserId:userInfo[kMXKRoomBubbleCellUserIdKey]];
        if (selectedRoomMember)
        {
            [self performSegueWithIdentifier:@"showMemberDetails" sender:self];
        }
    }
    else
    {
        // Keep default implementation for other actions
        [super dataSource:dataSource didRecognizeAction:actionIdentifier inCell:cell userInfo:userInfo];
    }
}

#pragma mark - Segues

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Keep ref on destinationViewController
    [super prepareForSegue:segue sender:sender];
    
    id pushedViewController = [segue destinationViewController];
    
    if ([[segue identifier] isEqualToString:@"showMemberList"])
    {
        if ([pushedViewController isKindOfClass:[MXKRoomMemberListViewController class]])
        {
            MXKRoomMemberListViewController* membersController = (MXKRoomMemberListViewController*)pushedViewController;
            
            // Dismiss keyboard
            [self dismissKeyboard];
            
            MXKRoomMemberListDataSource *membersDataSource = [[MXKRoomMemberListDataSource alloc] initWithRoomId:self.roomDataSource.roomId andMatrixSession:self.mainSession];
            [membersController displayList:membersDataSource];
        }
    }
    else if ([[segue identifier] isEqualToString:@"showMemberDetails"])
    {
        if (selectedRoomMember)
        {
            MXKRoomMemberDetailsViewController *memberViewController = pushedViewController;
            // Set rageShake handler
            memberViewController.rageShakeManager = [RageShakeManager sharedManager];
            // Set delegate to handle start chat option
            memberViewController.delegate = [AppDelegate theDelegate];
            
            [memberViewController displayRoomMember:selectedRoomMember withMatrixRoom:self.roomDataSource.room];
            
            selectedRoomMember = nil;
        }
    }
}

#pragma mark - Action

- (IBAction)onButtonPressed:(id)sender
{
    if (sender == voipVoiceCallButton || sender == voipVideoCallButton)
    {
        [self.mainSession.callManager placeCallInRoom:self.roomDataSource.roomId withVideo:(sender == voipVideoCallButton)];
    }
}

@end