/*
 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 "RoomTitleView.h"

#import "ThemeService.h"
#import "GeneratedInterface-Swift.h"

@interface RoomTitleView()
{
    /**
     The observer of the presence for direct user.
    */
    id mxDirectUserPresenceObserver;
}
@end

@implementation RoomTitleView

+ (UINib *)nib
{
    return [UINib nibWithNibName:NSStringFromClass([RoomTitleView class])
                          bundle:[NSBundle bundleForClass:[RoomTitleView class]]];
}

- (void)dealloc
{
    _roomPreviewData = nil;
}

- (void)awakeFromNib
{
    [super awakeFromNib];
    
    self.badgeImageView.image = nil;
    
    if (_titleMask)
    {
        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(reportTapGesture:)];
        [tap setNumberOfTouchesRequired:1];
        [tap setNumberOfTapsRequired:1];
        [tap setDelegate:self];
        [self.titleMask addGestureRecognizer:tap];
        self.titleMask.userInteractionEnabled = YES;
        self.dotView.layer.masksToBounds = YES;
        self.dotView.layer.cornerRadius = CGRectGetMidX(self.dotView.bounds);
    }
}

- (void)layoutSubviews
{
    [super layoutSubviews];

    self.pictureView.layer.cornerRadius = self.pictureView.bounds.size.width / 2.;

    if (self.superview)
    {
        // Force the title view layout by adding 2 new constraints on the UINavigationBarContentView instance.
        NSLayoutConstraint *topConstraint = [NSLayoutConstraint constraintWithItem:self
                                                                         attribute:NSLayoutAttributeTop
                                                                         relatedBy:NSLayoutRelationEqual
                                                                            toItem:self.superview
                                                                         attribute:NSLayoutAttributeTop
                                                                        multiplier:1.0f
                                                                          constant:0.0f];
        NSLayoutConstraint *centerXConstraint = [NSLayoutConstraint constraintWithItem:self
                                                                             attribute:NSLayoutAttributeCenterX
                                                                             relatedBy:NSLayoutRelationEqual
                                                                                toItem:self.superview
                                                                             attribute:NSLayoutAttributeCenterX
                                                                            multiplier:1.0f
                                                                              constant:0.0f];
        
        [NSLayoutConstraint activateConstraints:@[topConstraint, centerXConstraint]];
    }
}

-(void)customizeViewRendering
{
    [super customizeViewRendering];

    self.backgroundColor = UIColor.clearColor;
    self.displayNameTextField.textColor = (self.mxRoom.summary.displayname.length ? ThemeService.shared.theme.textPrimaryColor : ThemeService.shared.theme.textSecondaryColor);
    self.typingLabel.textColor = ThemeService.shared.theme.textSecondaryColor;
    self.dotView.backgroundColor = ThemeService.shared.theme.warningColor;
    self.missedDiscussionsBadgeLabel.textColor = ThemeService.shared.theme.tintColor;
}

- (void)setRoomPreviewData:(RoomPreviewData *)roomPreviewData
{
    _roomPreviewData = roomPreviewData;
    
    [self refreshDisplay];
}

- (void)refreshDisplay
{
    [super refreshDisplay];
    
    // Consider in priority the preview data (if any)
    if (self.roomPreviewData)
    {
        self.displayNameTextField.text = self.roomPreviewData.roomName;
    }
    else if (self.mxRoom)
    {
        if (!mxDirectUserPresenceObserver && self.mxRoom.isDirect)
        {
            // Observe contact presence change
            MXWeakify(self);
            mxDirectUserPresenceObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kMXKContactManagerMatrixUserPresenceChangeNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notif) {
                MXStrongifyAndReturnIfNil(self);
                
                NSString* directUserId = self.mxRoom.directUserId;
                
                if (directUserId && [directUserId isEqualToString:notif.object])
                {
                    [self refreshContactPresence];
                }
            }];
            
            [self refreshContactPresence];
        }
        
        self.displayNameTextField.text = self.mxRoom.summary.displayname;
        if (!self.displayNameTextField.text.length)
        {
            self.displayNameTextField.text = [VectorL10n roomDisplaynameEmptyRoom];
            self.displayNameTextField.textColor = ThemeService.shared.theme.textSecondaryColor;
        }
        else
        {
            self.displayNameTextField.textColor = ThemeService.shared.theme.textPrimaryColor;
        }
    }
}

- (void)refreshContactPresence
{
    MXUser *contact = [self.mxRoom.mxSession userWithUserId:self.mxRoom.directUserId];
    BOOL presenceHidden = contact.presence == MXPresenceUnknown;
    self.presenceIndicatorView.hidden = presenceHidden;
    self.presenceIndicatorView.borderColor = ThemeService.shared.theme.headerBackgroundColor;
    self.presenceIndicatorView.presence = contact.presence;
    if (presenceHidden)
    {
        [self.badgeImageViewLeadingToPictureViewConstraint setPriority:UILayoutPriorityDefaultLow];
        [self.badgeImageViewCenterYToDisplayNameConstraint setPriority:UILayoutPriorityDefaultLow];
        [self.badgeImageViewToPictureViewBottomConstraint setPriority:UILayoutPriorityRequired];
        [self.badgeImageViewToPictureViewTrailingConstraint setPriority:UILayoutPriorityRequired];
    }
    else
    {
        [self.badgeImageViewToPictureViewBottomConstraint setPriority:UILayoutPriorityDefaultLow];
        [self.badgeImageViewToPictureViewTrailingConstraint setPriority:UILayoutPriorityDefaultLow];
        [self.badgeImageViewLeadingToPictureViewConstraint setPriority:UILayoutPriorityRequired];
        [self.badgeImageViewCenterYToDisplayNameConstraint setPriority:UILayoutPriorityRequired];
    }
}

- (void)destroy
{
    self.tapGestureDelegate = nil;
    
    if (mxDirectUserPresenceObserver) {
        [[NSNotificationCenter defaultCenter] removeObserver:mxDirectUserPresenceObserver];
        mxDirectUserPresenceObserver = nil;
    }
    
    [super destroy];
}

- (void)reportTapGesture:(UITapGestureRecognizer*)tapGestureRecognizer
{
    if (self.tapGestureDelegate)
    {
        [self.tapGestureDelegate roomTitleView:self recognizeTapGesture:tapGestureRecognizer];
    }
}

- (void)updateLayoutForOrientation:(UIInterfaceOrientation)orientation
{
    if (UIInterfaceOrientationIsLandscape(orientation))
    {
        self.missedDiscussionsBadgeLabel.font = [UIFont systemFontOfSize:10];
        self.missedDiscussionsBadgeLabelLeadingConstraint.constant = -24;
        self.pictureViewWidthConstraint.constant = 28;
        self.pictureViewHeightConstraint.constant = 28;
        self.displayNameTextField.font = [UIFont systemFontOfSize:14 weight:UIFontWeightMedium];
        self.typingLabel.font = [UIFont systemFontOfSize:10];
        self.dotViewCenterYConstraint.constant = -2;
    }
    else
    {
        self.missedDiscussionsBadgeLabel.font = [UIFont systemFontOfSize:15];
        self.missedDiscussionsBadgeLabelLeadingConstraint.constant = -32;
        self.pictureViewWidthConstraint.constant = 32;
        self.pictureViewHeightConstraint.constant = 32;
        self.displayNameTextField.font = [UIFont systemFontOfSize:17 weight:UIFontWeightMedium];
        self.typingLabel.font = [UIFont systemFontOfSize:12];
        self.dotViewCenterYConstraint.constant = -1;
   }
}

- (void)setTypingNotificationString:(NSString *)typingNotificationString
{
    if (typingNotificationString.length > 0)
    {
        self.typingLabel.text = typingNotificationString;
        [self layoutIfNeeded];

        [UIView animateWithDuration:.1 animations:^{
            self.typingLabel.alpha = 1;
            self.displayNameCenterYConstraint.constant = -8;
            [self layoutIfNeeded];
        }];
    }
    else
    {
        [UIView animateWithDuration:.1 animations:^{
            self.typingLabel.alpha = 0;
            self.displayNameCenterYConstraint.constant = 0;
            [self layoutIfNeeded];
        } completion:^(BOOL finished) {
            self.typingLabel.text = nil;
        }];
    }
}

- (NSString *)typingNotificationString
{
    return self.typingLabel.text;
}

@end