//
//  MessageCell.m
//  Juick
//
//  Created by Vitaly Takmazov on 03/12/2017.
//  Copyright © 2017 com.juick. All rights reserved.
//

#import "MessageCell.h"
#import "APIClient.h"
#import "Entity.h"

#import "NSDate+TimeAgo.h"

@interface MessageCell()
@property(nonatomic, readonly) NSMutableParagraphStyle *quoteStyle;
@property(nonatomic, readonly) UIFont *boldFont;
@property(nonatomic, readonly) UIFont *italicFont;
@end

@implementation MessageCell

const NSString *unreadMarker = @"●";

- (void)awakeFromNib {
    [super awakeFromNib];
    self.text.dataDetectorTypes = UIDataDetectorTypeAll;
    self.text.tintColor = [UIColor colorNamed:@"Title"];
    self.title.textColor = [UIColor colorNamed:@"Title"];
    self.timestamp.textColor = [UIColor colorNamed:@"Muted"];
    self.summary.textColor = [UIColor colorNamed:@"Muted"];
    UIGestureRecognizer *avatarTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(avatarClicked:)];
    [avatarTapRecognizer setEnabled:YES];
    [self.avatar addGestureRecognizer:avatarTapRecognizer];
    [self.avatar setUserInteractionEnabled:YES];
    _quoteStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    _quoteStyle.firstLineHeadIndent = 12.0f;
    _quoteStyle.headIndent = 12.0f;
    _quoteStyle.paragraphSpacing = 6.0f;
    UIFontDescriptor* fontDescriptor = [UIFontDescriptor
                                        preferredFontDescriptorWithTextStyle:UIFontTextStyleBody];
    UIFontDescriptor* boldFontDescriptor = [fontDescriptor
                                            fontDescriptorWithSymbolicTraits:UIFontDescriptorTraitBold];
    _boldFont =  [UIFont fontWithDescriptor:boldFontDescriptor size: 0.0];
    UIFontDescriptor* italicFontDescriptor = [fontDescriptor
                                              fontDescriptorWithSymbolicTraits:UIFontDescriptorTraitItalic];
    _italicFont =  [UIFont fontWithDescriptor:italicFontDescriptor size: 0.0];
}

- (void) configureWithMessage:(Message *)msg {
    self.avatar.image = nil;
    __weak UIImageView *weakAvatar = self.avatar;
    [[APIClient sharedClient] fetchImageWithURL:[NSURL URLWithString:msg.user.avatar] callback:^(NSData *data) {
        [UIView transitionWithView:weakAvatar
                          duration:0.3
                           options:UIViewAnimationOptionTransitionCrossDissolve
                        animations:^{
                            weakAvatar.image = [UIImage imageWithData:data];
                        }
                        completion:nil];
    }];
    if ([msg.attach length] > 0) {
        CGFloat imageHeight = [msg.attachment.small.height floatValue] / [[UIScreen mainScreen] scale];
        CGFloat imageWidth = [msg.attachment.small.width floatValue] / [[UIScreen mainScreen] scale];
        self.attach.image = [UIImage placeholderImageWithColor:[UIColor colorNamed:@"Muted"] size:CGSizeMake(imageWidth, imageHeight)];
        
        self.attachmentHeight.constant = imageHeight;
        self.attachmentWidth.constant = imageWidth;
        __weak UIImageView *weakAttach = self.attach;
        [[APIClient sharedClient] fetchImageWithURL:[NSURL URLWithString:msg.attachment.small.url] callback:^(NSData *data) {
            [UIView transitionWithView:weakAttach
                              duration:0.3
                               options:UIViewAnimationOptionTransitionCrossDissolve
                            animations:^{
                                weakAttach.image = [UIImage imageWithData:data];
                            }
                            completion:nil];
        }];
    } else {
        self.attachmentHeight.constant = 0;
        self.attach.image = nil;
    }
    self.title.text = msg.user.uname;
    
    self.timestamp.text = [[[APIClient sharedClient].dateFormatter dateFromString:msg.timestamp] timeAgo];
    NSUInteger count = [msg.repliesCount unsignedIntegerValue];
    if (count > 0) {
        if ([msg.repliesBy length] > 0) {
            self.summary.text = [NSString stringWithFormat:@"%@ replies by %@", msg.repliesCount, msg.repliesBy];
        } else {
            self.summary.text = [NSString stringWithFormat:@"%@ replies", msg.repliesCount];
        }
    } else {
        self.summary.text = nil;
    }
    if (msg.unread) {
        self.summary.text = [NSString stringWithFormat:@"%@ %@", unreadMarker, self.summary.text];
        self.summary.textColor = [UIColor colorNamed:@"Funny"];
    } else {
        self.summary.textColor = [UIColor colorNamed:@"Muted"];
    }
    self.text.attributedText = nil;
    if (msg.text) {
        [self.text setHidden:NO];
        NSMutableAttributedString *txt = [[NSMutableAttributedString alloc]
                                          initWithString:msg.text
                                          attributes:@{NSFontAttributeName:[UIFont preferredFontForTextStyle:UIFontTextStyleBody],
                                                       NSForegroundColorAttributeName:[UIColor colorNamed:@"Text"]
                                          }];
        [txt beginEditing];
        for (Entity *entity in msg.entities) {
            NSUInteger start = entity.start ? [entity.start unsignedIntegerValue] : 0;
            NSUInteger end =  entity.end ? [entity.end unsignedIntegerValue] : 0;
            NSString *text = entity.text ? entity.text : @"";
            NSRange currentRange = NSMakeRange(start, end - start);
            [txt addAttribute:@"displayText" value:text range:currentRange];
            if ([entity.type isEqualToString:@"a"]) {
                [txt addAttribute:NSLinkAttributeName value:entity.link range:currentRange];
            }
            if ([entity.type isEqualToString:@"q"]) {
                [txt addAttribute:NSForegroundColorAttributeName value:[UIColor colorNamed:@"Muted"] range:currentRange];
                [txt addAttribute:NSParagraphStyleAttributeName value:_quoteStyle range:currentRange];
            }
            if ([entity.type isEqualToString:@"u"]) {
                [txt addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleSingle) range:currentRange];
            }
            
            if ([entity.type isEqualToString:@"b"]) {
                [txt addAttribute:NSFontAttributeName value:_boldFont range:currentRange];
            }
            if ([entity.type isEqualToString:@"i"]) {
                [txt addAttribute:NSFontAttributeName value:_italicFont range:currentRange];
            }
        }
        [txt enumerateAttribute:@"displayText" inRange:NSMakeRange(0, [txt length]) options:0 usingBlock:^(id  _Nullable value, NSRange range, BOOL * _Nonnull stop) {
            if (value) {
                [txt replaceCharactersInRange:range withString:value];
            }
        }];
        if ([msg.tags count] > 0) {
            NSString *tagsList = [NSString stringWithFormat:@"%@\n", [msg.tags componentsJoinedByString:@", "]];
            [txt insertAttributedString:[[NSAttributedString alloc]
                                         initWithString:tagsList
                                         attributes:@{
                                                      NSFontAttributeName:_italicFont,
                                                      NSForegroundColorAttributeName:[UIColor colorNamed:@"Muted"]
                                                      }] atIndex:0];
        }
        [txt endEditing];
        self.text.attributedText = txt;
    } else {
        [self.text setHidden:YES];
    }
}

-(void) avatarClicked:(UIGestureRecognizer *)gestureRecognizer {
    [self.delegate avatarClicked:self.title.text];
}

@end