IM-ios/AIIM/Controller/chat/chetCell/chatCellView.m

//
//  chatCellView.m
//  AIIM
//
//  Created by gan on 2025/6/24.
//

#import <Foundation/Foundation.h>
#import "chatCellView.h"
#import "ChatLongPressMenuView.h"
#import "ChatPopoverView.h"
#import "CryptoAES.h"
#import <SDWebImage/UIImageView+WebCache.h>
#import <SDWebImage/SDWebImage.h>
#import <AVFoundation/AVFoundation.h>
#import <AVKit/AVKit.h>
#import "config.h"
#import "FilePreviewer.h"
#import "ChatRecordController.h"
#import "QuoteDetailController.h"
#import "UILabel+YBAttributeTextTapAction.h"
#import <SafariServices/SFSafariViewController.h>


// 定义一些常量
static const CGFloat kTextVerticalMargin = 10.0f;        //  内容垂直边距
static const CGFloat kTextHorizontalMargin = 12.0f;        //文本水平边距
static const CGFloat kVerticalMargin = 18.0f;        // 垂直边距
static const CGFloat kContentMaxWidth = 220.0f;     // 内容最大宽度
static const CGFloat kAvatarSize = 36.0f;           // 头像大小
static const CGFloat kAvatarMargin = 20.0f;          // 头像边距
static const CGFloat kAvatarBatchMargin = 70.0f;     // 批量操作头像边距
static const CGFloat kBubbleTopMargin = 20.0f;      // 气泡顶部距离
static const CGFloat kBubbleBottomMargin = 40.0f;      // 气泡底部距离
static const CGFloat kBubbleArrowWidth = 6.0f;      // 气泡箭头宽度
static const CGFloat kMinBubbleHeight = 18.0f;      // 气泡最小高度
static const CGFloat kMediaCornerRadius = 4.0f;

@interface chatCellView()

// 基本视图
@property (nonatomic, strong) UIImageView *avatarImageView;
@property (nonatomic, strong) UILabel *nameLabel;
@property (nonatomic, strong) UIImageView *bubbleImageView;
@property (nonatomic, strong) UILabel * timeLabel;
@property (nonatomic, strong) UILabel * readStateLbl;
@property (nonatomic, strong) UIButton * batchStateBtn;

// 内容视图
@property (nonatomic, strong) UILabel *textLbl;
@property (nonatomic, strong) UIImageView *imageContentView;
@property (nonatomic, strong) UIView *videoContentView;
@property (nonatomic, strong) UIImageView *thumbnailView;
@property (nonatomic, strong) UIImageView *loadingImg;

@property (nonatomic, strong) UIView *fileContentView;
@property (nonatomic, strong) UIView *voiceContentView;
@property (nonatomic, strong) UIView *callContentView;
@property (nonatomic, strong) UIView *historyContentView;
@property (nonatomic, strong) UILabel * eventLbl;
@property (nonatomic, strong) UILabel * callbackLbl;
@property (nonatomic, strong) UILabel * deleateLbl;
@property (nonatomic, strong) UILabel * quoteLbl;

@property (nonatomic, strong) UILabel * jinduLbl;

@property (strong, nonatomic) AVPlayer *player;
@property (strong, nonatomic) AVPlayerViewController *playerViewController;

// 当前显示的内容视图
@property (nonatomic, weak) UIView *currentContentView;

@property (nonatomic,strong) NSArray *matchesArray;

@end


@implementation chatCellView



- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        [self initAlllSubviews];
        self.selectionStyle = UITableViewCellSelectionStyleNone;
        self.backgroundColor = [UIColor clearColor];
    }
    return self;
}


-(void)initAlllSubviews{
    //复选框
    _batchStateBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    [_batchStateBtn setBackgroundImage:kImageMake(@"checkbox_unselected") forState:UIControlStateNormal];
    [_batchStateBtn setBackgroundImage:kImageMake(@"checkbox_selected") forState:UIControlStateSelected];
    _batchStateBtn.hidden = YES;
    [self.contentView addSubview:_batchStateBtn];
    [_batchStateBtn addTarget:self action:@selector(batchStateButtonClicked) forControlEvents:UIControlEventTouchUpInside];
    // 头像
    _avatarImageView = [UIImageView new];
    _avatarImageView.layer.cornerRadius = kAvatarSize / 2;
    _avatarImageView.layer.masksToBounds = YES;
    _avatarImageView.userInteractionEnabled = YES;
    _avatarImageView.contentMode = UIViewContentModeScaleAspectFill;
    [self.contentView addSubview:_avatarImageView];
    
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleAvatarTap)];
    [_avatarImageView addGestureRecognizer:tap];
    
//    [_avatarImageView jk_addLongPressActionWithBlock:^(UIGestureRecognizer *gestureRecoginzer) {
//        [self handleAvatarLongPress];
//    }];
    
    // 名字
    _nameLabel = [UILabel new];
    _nameLabel.font = SYSFONT(12);
    _nameLabel.textColor = [UIColor whiteColor];
    [self.contentView addSubview:_nameLabel];
    
    // 时间
    _timeLabel = [UILabel new];
    _timeLabel.font = SYSFONT(12);
    _timeLabel.textColor = UIColor.whiteColor;
    [self.contentView addSubview:_timeLabel];
    
    _readStateLbl = [UILabel new];
    _readStateLbl.font = SYSFONT(12);
    _readStateLbl.textColor = UIColor.whiteColor;
    [self.contentView addSubview:_readStateLbl];
    
    // 气泡背景
    _bubbleImageView = [UIImageView new];
    _bubbleImageView.userInteractionEnabled = YES;
    [self.contentView addSubview:_bubbleImageView];
    
    // 初始化所有内容视图
    [self setupTextContentView];
    [self setupImageContentView];
    [self setupVideoContentView];
    [self setupFileContentView];
    [self setupVoiceContentView];
    [self setupCallContentView];
    [self setupHistoryContentView];
    [self setupEventContentView];
    [self setupCallbackContentView];
    [self setupdeleateContentView];
}


#pragma mark - 内容视图配置
- (void)setupTextContentView {
    _textLbl = [UILabel new];
    _textLbl.numberOfLines = 0;
    _textLbl.textColor = UIColor.blackColor;
    _textLbl.userInteractionEnabled = YES; // 允许用户交互
    [self.contentView addSubview:_textLbl];

    
//    UITapGestureRecognizer *taptext = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(labelTapped:)];
//    [_textLbl addGestureRecognizer:taptext];
    
    
    _quoteLbl = [UILabel new];
    _quoteLbl.numberOfLines = 1;
    _quoteLbl.font = SYSFONT(16);
    _quoteLbl.textColor = UIColor.whiteColor;
    _quoteLbl.layer.cornerRadius = 2.f;
    _quoteLbl.layer.masksToBounds = YES;
    _quoteLbl.userInteractionEnabled = YES; // 允许用户交互
    [self.contentView addSubview:_quoteLbl];
//    _quoteLbl.backgroundColor = [UIColor redColor];
    
//     添加点击手势
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleQuoteTap)];
    [_quoteLbl addGestureRecognizer:tap];
    [self.contentView bringSubviewToFront:_quoteLbl];
}

- (void)setupImageContentView {
    _imageContentView = [UIImageView new];
    _imageContentView.contentMode = UIViewContentModeScaleAspectFit;
    _imageContentView.clipsToBounds = YES;
    _imageContentView.layer.cornerRadius = kMediaCornerRadius;
    _imageContentView.layer.masksToBounds = YES;
    _imageContentView.userInteractionEnabled = YES;
    [self.contentView addSubview:_imageContentView];
    
    // 添加点击手势
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleImageTap)];
    [_imageContentView addGestureRecognizer:tap];
}

- (void)setupVideoContentView {
    _videoContentView = [UIView new];
    _videoContentView.layer.cornerRadius = kMediaCornerRadius;
    _videoContentView.layer.masksToBounds = YES;
    _videoContentView.backgroundColor = [UIColor colorWithWhite:0.95 alpha:1.0];
    _videoContentView.userInteractionEnabled = YES;
    
    
    
    
    
    _thumbnailView = [[UIImageView alloc] init];
    
    _thumbnailView.contentMode = UIViewContentModeScaleAspectFill;
    _thumbnailView.clipsToBounds = YES;
    _thumbnailView.backgroundColor = [UIColor colorWithWhite:0.95 alpha:1.0];
    [_videoContentView addSubview:_thumbnailView];
    [_thumbnailView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(_videoContentView);
    }];
    
    NSString *gifPath = [[NSBundle mainBundle] pathForResource:@"load" ofType:@"gif"];
    NSData *gifData = [NSData dataWithContentsOfFile:gifPath];
    UIImage *placeholder = [UIImage sd_imageWithGIFData:gifData];
    
    _loadingImg = [[UIImageView alloc] initWithImage:placeholder];
    [_videoContentView addSubview:_loadingImg];
    [_loadingImg mas_makeConstraints:^(MASConstraintMaker *make) {
        make.center.equalTo(_videoContentView);
        make.width.height.mas_equalTo(100);
    }];
    _loadingImg.alpha = 0;
    
    UIImageView *playIcon = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"play_btn"]];
    [_videoContentView addSubview:playIcon];
    [playIcon mas_makeConstraints:^(MASConstraintMaker *make) {
        make.center.equalTo(_videoContentView);
        make.width.height.mas_equalTo(40);
    }];
    
    
    _jinduLbl = [UILabel new];
    [_videoContentView addSubview:_jinduLbl];
    _jinduLbl.alpha = 0;
    _jinduLbl.numberOfLines = 1;
    _jinduLbl.font = SYSFONT(16);
    _jinduLbl.textColor = UIColor.whiteColor;
    _jinduLbl.layer.cornerRadius = 20.f;
    _jinduLbl.layer.masksToBounds = YES;
    _jinduLbl.textAlignment = NSTextAlignmentCenter;
    _jinduLbl.backgroundColor =[UIColor colorWithRed:0 green:0 blue:0 alpha:0.7];
    _jinduLbl.text = @"99";
    [_jinduLbl mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(_videoContentView).offset(8);
        make.top.equalTo(_videoContentView).offset(8);
        make.width.height.mas_equalTo(40);
    }];
    
    
    [self.contentView addSubview:_videoContentView];
    
    // 添加点击手势
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleVideoTap)];
    [_videoContentView addGestureRecognizer:tap];
}

- (void)setupFileContentView {
    _fileContentView = [UIView new];
    
    UIImageView *iconView = [[UIImageView alloc] init];
    UILabel *nameLabel = [[UILabel alloc] init];
    nameLabel.textColor = UIColor.blackColor;
    nameLabel.font = [UIFont systemFontOfSize:14];
    nameLabel.numberOfLines = 1;
    UILabel *sizeLabel = [[UILabel alloc] init];
    sizeLabel.font = [UIFont systemFontOfSize:12];
    sizeLabel.textColor = [UIColor grayColor];
    
    [_fileContentView addSubview:iconView];
    [_fileContentView addSubview:nameLabel];
    [_fileContentView addSubview:sizeLabel];
    
    [iconView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(_fileContentView).offset(8);
        make.centerY.equalTo(_fileContentView);
        make.width.height.mas_equalTo(40);
    }];
    
    [nameLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(iconView.mas_right).offset(8);
        make.top.equalTo(_fileContentView).offset(8);
        make.right.equalTo(_fileContentView).offset(-8);
    }];
    
    [sizeLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(nameLabel);
        make.top.equalTo(nameLabel.mas_bottom).offset(4);
        make.right.equalTo(nameLabel);
        make.bottom.lessThanOrEqualTo(_fileContentView).offset(-8);
    }];
    
    [self.contentView addSubview:_fileContentView];
    
//    添加点击手势
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleFileTap)];
    [_fileContentView addGestureRecognizer:tap];
}

- (void)setupVoiceContentView {
    _voiceContentView = [UIView new];
    
    UIImageView *voiceIcon = [[UIImageView alloc] initWithImage:kImageMake(@"play_btn")];
    UILabel *durationLabel = [[UILabel alloc] init];
    durationLabel.textColor = UIColor.blackColor;
    durationLabel.font = [UIFont systemFontOfSize:14];
    
    [_voiceContentView addSubview:voiceIcon];
    [_voiceContentView addSubview:durationLabel];
    
    [voiceIcon mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(_voiceContentView);
        make.width.height.mas_equalTo(20);
    }];
    
    [durationLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(_voiceContentView);
        make.left.equalTo(voiceIcon.mas_right).offset(8);
    }];
    
    [self.contentView addSubview:_voiceContentView];
    
    // 添加点击手势
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleVoiceTap)];
    [_voiceContentView addGestureRecognizer:tap];
}

- (void)setupCallContentView {
    _callContentView = [UIView new];
    
    UIImageView *callIcon = [[UIImageView alloc] init];
    UILabel *callLabel = [[UILabel alloc] init];
    callLabel.textColor = UIColor.blackColor;
    callLabel.font = [UIFont systemFontOfSize:16];
    UILabel *durationLabel = [[UILabel alloc] init];
    durationLabel.font = [UIFont systemFontOfSize:16];
    durationLabel.textColor = [UIColor grayColor];
    
    [_callContentView addSubview:callIcon];
    [_callContentView addSubview:callLabel];
    [_callContentView addSubview:durationLabel];
    
//    [callIcon mas_makeConstraints:^(MASConstraintMaker *make) {
//        make.left.equalTo(_callContentView).offset(8);
//        make.centerY.equalTo(_callContentView);
//        make.width.height.mas_equalTo(20);
//    }];
//
//    [callLabel mas_makeConstraints:^(MASConstraintMaker *make) {
//        make.left.equalTo(callIcon.mas_right).offset(8);
//        make.top.equalTo(_callContentView).offset(8);
////        make.width.mas_lessThanOrEqualTo(70);
////        make.right.equalTo(_callContentView).offset(-8);
//    }];
//
//    [durationLabel mas_makeConstraints:^(MASConstraintMaker *make) {
//        make.left.equalTo(callLabel.mas_right).offset(8);
//        make.top.equalTo(callLabel);
//        make.right.equalTo(_callContentView).offset(-8);
//        make.bottom.equalTo(_callContentView).offset(-8);
//    }];
    
    [self.contentView addSubview:_callContentView];
    
    // 添加点击手势
//    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleCallTap)];
//    [_callContentView addGestureRecognizer:tap];
}

- (void)setupHistoryContentView {
    _historyContentView = [UIView new];
    
    UILabel *titleLabel = [[UILabel alloc] init];
    titleLabel.font = SYSBFONT(14);
    titleLabel.text = @"聊天记录";
    titleLabel.textColor = UIColor.blackColor;
    
    UILabel *contentLabel = [[UILabel alloc] init];
    contentLabel.font = SYSFONT(12);
    contentLabel.numberOfLines = 6;
//    contentLabel.displaysAsynchronously = YES;
    
    [_historyContentView addSubview:titleLabel];
    [_historyContentView addSubview:contentLabel];
    
    [titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.top.equalTo(_historyContentView).offset(8);
        make.right.equalTo(_historyContentView).offset(-8);
        make.height.mas_equalTo(14);
    }];
    
    [contentLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(titleLabel);
        make.top.equalTo(titleLabel.mas_bottom).offset(4);
        make.bottom.equalTo(_historyContentView).offset(-8);
    }];
    
    [self.contentView addSubview:_historyContentView];
    
    // 添加点击手势
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleHistoryTap)];
    [_historyContentView addGestureRecognizer:tap];
}

- (void)setupEventContentView {
    _eventLbl = [[UILabel alloc] init];
    _eventLbl.font = SYSFONT(14);
    _eventLbl.textColor = UIColor.whiteColor;
    
    _eventLbl.layer.cornerRadius = 2.f;
    _eventLbl.layer.masksToBounds = YES;
    
    [self.contentView addSubview:_eventLbl];
}

- (void)setupCallbackContentView {
    _callbackLbl = [[UILabel alloc] init];
    _callbackLbl.font = SYSFONT(14);
    _callbackLbl.textColor = UIColor.whiteColor;
    _callbackLbl.layer.cornerRadius = 2.f;
    _callbackLbl.layer.masksToBounds = YES;
    
    [self.contentView addSubview:_callbackLbl];
}

- (void)setupdeleateContentView {
    _deleateLbl = [[UILabel alloc] init];
    _deleateLbl.font = SYSFONT(14);
    _deleateLbl.textColor = UIColor.blackColor;
    _deleateLbl.layer.cornerRadius = 2.f;
    _deleateLbl.layer.masksToBounds = YES;
    
    [self.contentView addSubview:_deleateLbl];
}

#pragma mark - 数据绑定
- (void)setMessageModel:(ChatMessageModel *)messageModel {
//    NSLog(@"messageModel:%@",messageModel);
    _messageModel = messageModel;
    // 隐藏所有内容视图
    _textLbl.hidden = YES;
    _quoteLbl.hidden = YES;
    _imageContentView.hidden = YES;
    _videoContentView.hidden = YES;
    _fileContentView.hidden = YES;
    _voiceContentView.hidden = YES;
    _callContentView.hidden = YES;
    _historyContentView.hidden = YES;
    _eventLbl.hidden = YES;
    _callbackLbl.hidden = YES;
    _deleateLbl.hidden = YES;
    _readStateLbl.hidden = YES;
    
    // 根据消息类型配置内容
    switch (messageModel.messageType) {
        case ChatMessageTypeText:
            [self setupTextContent];
            break;
        case ChatMessageTypeImage:
            [self setupImageContent];
            break;
        case ChatMessageTypeVideo:
            [self setupVideoContent];
            break;
        case ChatMessageTypeFile:
            [self setupFileContent];
            break;
        case ChatMessageTypeCallBack:
            //撤回
            [self setupCallbackContent];
            break;
        case ChatMessageTypeVoice:
            [self setupVoiceContent];
            break;
        case ChatMessageTypeCall:
            [self setupCallContent];
            break;
        case ChatMessageTypeHistory:
            [self setupHistoryContent];
            break;
        case ChatMessageTypeEvent:
            [self setupEventContent];
            break;
        case ChatMessageTypeCallBack2:
            //撤回PC
            [self setupCallbackContent];
            break;
        case ChatMessageTypeDel:
            [self setupDeleateContent];
            break;
    }
    
    // 配置头像和名字
    [self setupAvatarAndName];
    
    // 配置气泡背景
    [self setupBubbleBackground];
    
    // 更新布局
    [self layoutContentViews];
    
    //长按事件
    [self setupLongPressEvent];
    
}
#pragma mark - 批量状态
- (void)setBatchState:(BOOL)batchState{
    
    if (_messageModel.messageType == ChatMessageTypeEvent || _messageModel.messageType == ChatMessageTypeCallBack || _messageModel.messageType == ChatMessageTypeCallBack2) {
        self.batchStateBtn.hidden = YES;
        return;
    }
    
    _batchState = batchState;
    self.batchStateBtn.hidden = !batchState;
    if (!_messageModel.isSender) {
        if (batchState) {
            [_avatarImageView mas_remakeConstraints:^(MASConstraintMaker *make) {
                make.size.mas_equalTo(CGSizeMake(kAvatarSize, kAvatarSize));
                make.left.mas_equalTo(kAvatarBatchMargin);
                make.top.equalTo(self.contentView).offset(kVerticalMargin);
            }];
        }else{
            [_avatarImageView mas_remakeConstraints:^(MASConstraintMaker *make) {
                make.size.mas_equalTo(CGSizeMake(kAvatarSize, kAvatarSize));
                make.left.mas_equalTo(kAvatarMargin);
                make.top.equalTo(self.contentView).offset(kVerticalMargin);
            }];
        }
    }
    
    self.batchStateBtn.selected = NO;
}

- (void)setupAvatarAndName {
    self.readStateLbl.text = nil;
    // 这里应该根据实际数据设置头像和名字
    if (_messageModel.avatar) {
        [_avatarImageView sd_setImageWithURL:getURL(_messageModel.avatar) placeholderImage:kImageMake(@"Avatar")];
    }else{
        _avatarImageView.image = kImageMake(@"Avatar");
    }
    
    _timeLabel.text = _messageModel.formatterTime;
    _readStateLbl.text = _messageModel.readStatus;
    if(_messageModel.readstate==4){
        _readStateLbl.textColor = globalColor(GCTypeOrangeR);
    }
    else{
        _readStateLbl.textColor = [UIColor whiteColor];
    }
    
    
    if (_messageModel.type==1) {
        if (_messageModel.nickName && ![_messageModel.nickName isKindOfClass:NSNull.class]) {
            _nameLabel.text = _messageModel.isSender ? @"": _messageModel.nickName;
            _nameLabel.textAlignment = _messageModel.isSender ? NSTextAlignmentRight : NSTextAlignmentLeft;
        }
    }
    
    
    if (_messageModel.messageType == ChatMessageTypeEvent || _messageModel.messageType == ChatMessageTypeCallBack || _messageModel.messageType == ChatMessageTypeCallBack2) {
        _avatarImageView.hidden = YES;
        _nameLabel.hidden = YES;
        _readStateLbl.hidden = YES;
        _timeLabel.hidden = YES;
    }else{
        _avatarImageView.hidden = NO;
        _nameLabel.hidden = NO;
        _readStateLbl.hidden = NO;
        _timeLabel.hidden = NO;
    }
    
    if (_messageModel.type == 0&& _messageModel.isSender) {
        _readStateLbl.hidden = NO;
    }else{
        _readStateLbl.hidden = YES;
    }
}

- (void)setupBubbleBackground {
    // 图片和视频类型不需要气泡背景
    if (_messageModel.messageType == ChatMessageTypeImage || _messageModel.messageType == ChatMessageTypeVideo || _messageModel.messageType == ChatMessageTypeEvent|| _messageModel.messageType == ChatMessageTypeCallBack || _messageModel.messageType == ChatMessageTypeCallBack2) {
        _bubbleImageView.hidden = YES;
        return;
    }
    
    _bubbleImageView.hidden = NO;
    UIImage *bubbleImage = _messageModel.isSender ? [UIImage imageNamed:@"rightlt"] : [UIImage imageNamed:@"leftlt"];
    
    // 拉伸气泡图片
    UIEdgeInsets insets = UIEdgeInsetsMake(30, _messageModel.isSender ? 20 : 10, 10, _messageModel.isSender ? 10 : 20);
    bubbleImage = [bubbleImage resizableImageWithCapInsets:insets resizingMode:UIImageResizingModeStretch];
    _bubbleImageView.image = bubbleImage;
}

- (void)setupLongPressEvent{
    if (_isHistory) {
        return;
    }
    if ( _messageModel.messageType == ChatMessageTypeEvent || _messageModel.messageType == ChatMessageTypeCallBack || _messageModel.messageType == ChatMessageTypeCall || _messageModel.messageType == ChatMessageTypeCallBack2) {
        return;
    }
    
//    NSLog(@"setupLongPressEvent-------1");
    // 创建长按手势识别器并设置目标方法
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressEvent:)];
    longPress.minimumPressDuration = 0.3; // 设置长按的最小时间为0.3秒
    [self.currentContentView addGestureRecognizer:longPress]; // 将手势识别器添加到视图上
    if(_messageModel.messageType ==ChatMessageTypeText){
        [self.bubbleImageView addGestureRecognizer:longPress]; // 将手势识别器添加到视图上
    }
    else{
        [self.currentContentView addGestureRecognizer:longPress]; // 将手势识别器添加到视图上
    }
}

- (void)longPressEvent:(UILongPressGestureRecognizer *)gestureRecognizer {
    if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
        NSLog(@"长按事件开始");
        // 在这里添加你的代码，例如显示菜单、编辑选项等
        
        if (_messageModel.messageType == ChatMessageTypeDel || _messageModel.messageType == ChatMessageTypeCallBack) {
            return;
        }
        weakSelf(self);
        
        if(weakself.bubbleCellLongPressMenuBlock){
            weakself.bubbleCellLongPressMenuBlock(99);
        }
        BOOL isSender = NO;
        if (_messageModel.isSender) {
            isSender = YES;
        }
        
        ChatLongPressMenuView * contenView = [[ChatLongPressMenuView alloc] initWithMessageType:_messageModel.messageType isSender:isSender];
        
        BOOL isMedia = NO;
        if (_messageModel.messageType == ChatMessageTypeImage || _messageModel.messageType == ChatMessageTypeVideo) {
            isMedia = YES;
        }else{
            isMedia = NO;
        }
        
        ChatPopoverView * popover = [[ChatPopoverView alloc] initWithContentView:contenView sourceView:isMedia ? self.currentContentView : self.bubbleImageView];
        [popover show];
        
        
        contenView.indexOfMenuClicked = ^(NSInteger index) {
            [popover dismiss];
            !weakself.bubbleCellLongPressMenuBlock ?: weakself.bubbleCellLongPressMenuBlock(index);
        };
    } else if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {
        NSLog(@"长按事件结束");
    }
    NSLog(@"longPressEvent-------");
}
- (void)batchStateButtonClicked{
    self.batchStateBtn.selected = !self.batchStateBtn.isSelected;
    !self.batchSelectedStateBlock ?: self.batchSelectedStateBlock(self.batchStateBtn.isSelected);
}

#pragma mark - 内容配置具体实现
- (void)setupTextContent {
    _textLbl.hidden = NO;
    
    if (_messageModel.quoteMessage) {
        self.quoteLbl.hidden = NO;
        self.quoteLbl.text = [NSString stringWithFormat:@"%@：%@",_messageModel.quoteMessage.nickName,_messageModel.quoteMessage.content];
    }else{
        _quoteLbl.hidden = YES;
    }
//    NSLog(@"_messageModel.content:%@",_messageModel.content);
    // 创建富文本
    NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:_messageModel.content ?: @""];
    // 处理特殊内容（链接、@用户等）
    [self highlightSpecialElementsInText:text];
    
    // 同步设置文本，避免闪烁
//    [UIView performWithoutAnimation:^{
//        _textLbl.attributedText = text;
//    }];

    if(_matchesArray.count>0){
        NSMutableArray *array = [NSMutableArray new];
        for (NSTextCheckingResult *match in _matchesArray) {
            if (match.resultType == NSTextCheckingTypeLink) {
                NSString *url =[NSString stringWithFormat:@"%@",match.URL];
                url=[url stringByReplacingOccurrencesOfString:@"http://" withString:@""];
                url=[url stringByReplacingOccurrencesOfString:@"https://" withString:@""];
                [array addObject:url];
            }
        }
        _textLbl.attributedText = [self getAttributeWith:array string:_messageModel.content orginFont:18 orginColor:[UIColor darkGrayColor] attributeFont:18 attributeColor:[UIColor blueColor]];
//        _textLbl.attributedText = text;
        [_textLbl yb_addAttributeTapActionWithStrings:array tapClicked:^(UILabel *label, NSString *string, NSRange range, NSInteger index) {
            NSLog(@"%ld:%@",(long)index,self->_matchesArray[index]);
            NSTextCheckingResult *match=self->_matchesArray[index];
//            [[UIApplication sharedApplication] openURL:match.URL options:@{} completionHandler:nil];
            // 点击后的操作
           
            SFSafariViewController *svc = [[SFSafariViewController alloc] initWithURL:match.URL];
            [self.parentViewController presentViewController:svc animated:YES completion:nil];

            
//            [FilePreviewer.shared previewFileWithLocalPath:@"" remoteURL:match.URL fromViewController:self.parentViewController];
        }];
    }
    else{
        _textLbl.attributedText = text;
    }
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressEvent:)];
    longPress.minimumPressDuration = 0.3; // 设置长按的最小时间为0.3秒
    [_textLbl addGestureRecognizer:longPress]; // 将手势识别器添加到视图上
    
    _currentContentView = _textLbl;
}



- (NSAttributedString *)getAttributeWith:(id)sender
                                  string:(NSString *)string
                               orginFont:(CGFloat)orginFont
                              orginColor:(UIColor *)orginColor
                           attributeFont:(CGFloat)attributeFont
                          attributeColor:(UIColor *)attributeColor
{
    __block  NSMutableAttributedString *totalStr = [[NSMutableAttributedString alloc] initWithString:string];
    [totalStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:orginFont] range:NSMakeRange(0, string.length)];
    [totalStr addAttribute:NSForegroundColorAttributeName value:orginColor range:NSMakeRange(0, string.length)];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    [paragraphStyle setLineSpacing:0.0f]; //设置行间距
    [paragraphStyle setLineBreakMode:NSLineBreakByTruncatingTail];
    [paragraphStyle setAlignment:NSTextAlignmentLeft];
    [paragraphStyle setLineBreakMode:NSLineBreakByCharWrapping];
    [totalStr addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [totalStr length])];
    
    if ([sender isKindOfClass:[NSArray class]]) {
        
        __block NSString *oringinStr = string;
        __weak typeof(self) weakSelf = self;
        
        [sender enumerateObjectsUsingBlock:^(NSString *  _Nonnull str, NSUInteger idx, BOOL * _Nonnull stop) {
            
            NSRange range = [oringinStr rangeOfString:str];
            if(range.length>0){
                [totalStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:attributeFont] range:range];
                [totalStr addAttribute:NSForegroundColorAttributeName value:attributeColor range:range];
//                oringinStr = [oringinStr stringByReplacingCharactersInRange:range withString:[weakSelf getStringWithRange:range]];
            }
            
        }];
        
    }else if ([sender isKindOfClass:[NSString class]]) {
        
        NSRange range = [string rangeOfString:sender];
        
        [totalStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:attributeFont] range:range];
        [totalStr addAttribute:NSForegroundColorAttributeName value:attributeColor range:range];
    }
    return totalStr;
}

- (NSString *)getStringWithRange:(NSRange)range
{
    NSMutableString *string = [NSMutableString string];
    for (int i = 0; i < range.length ; i++) {
        [string appendString:@" "];
    }
    return string;
}






#pragma mark - 辅助方法
- (void)highlightSpecialElementsInText:(NSMutableAttributedString *)text {
    // 高亮链接
    NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink error:nil];
    NSArray *matches = [detector matchesInString:text.string options:0 range:NSMakeRange(0, text.length)];
    NSLog(@"matches:%@",matches);
    _matchesArray =matches;

    // 高亮@用户（暂不开放）
//    NSRegularExpression *atRegex = [NSRegularExpression regularExpressionWithPattern:@"@[\\u4e00-\\u9fa5a-zA-Z0-9_-]+" options:0 error:nil];
//    NSArray *atMatches = [atRegex matchesInString:text.string options:0 range:text.yy_rangeOfAll];
//
//    for (NSTextCheckingResult *match in atMatches) {
//        [text yy_setColor:[UIColor orangeColor] range:match.range];
//        [text yy_setTextHighlightRange:match.range
//                                color:[UIColor orangeColor]
//                      backgroundColor:[UIColor colorWithWhite:0.9 alpha:0.5]
//                            tapAction:^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect) {
//            NSString *atUser = [text.string substringWithRange:range];
//            // 处理@用户点击
//            NSLog(@"点击了: %@", atUser);
//        }];
//    }
}

- (void)setupImageContent {
    _imageContentView.hidden = NO;
    
    if (_messageModel.localurl && _messageModel.localurl.length != 0) {//显示本地图片
        NSURL *localFileURL = getURL(_messageModel.localurl);
//        NSLog(@"UIImage------------1");
        // 从 URL 获取文件路径
        NSString *filePath = localFileURL.path;
        // 通过文件路径加载图片
        UIImage *image = [UIImage imageWithContentsOfFile:filePath];
        if (image) {//本地图片显示成功
//            NSLog(@"UIImage------------2");
            _imageContentView.image = image;
            CGImageRef cgImage = image.CGImage;
            CGFloat imageWidth = CGImageGetWidth(cgImage);
            CGFloat imageHeight = CGImageGetHeight(cgImage);
            CGFloat imageScale = imageWidth/imageHeight;
            CGFloat realWidth = 150 * imageScale;
            if(realWidth>220){
                realWidth=220;
                imageHeight=150;
            }
            else{
                imageHeight=150;
            }
            self.messageModel.mediaSize = CGSizeMake(realWidth, imageHeight);
            [self.imageContentView mas_updateConstraints:^(MASConstraintMaker *make) {
                make.width.mas_equalTo(realWidth);
            }];
            _currentContentView = _imageContentView;
            return;
        }
    }
    
    //没有有效本地图片 使用SDWebImage加载图片
//    NSLog(@"UIImage------------4：%@",_messageModel.url);
    NSString *gifPath = [[NSBundle mainBundle] pathForResource:@"load" ofType:@"gif"];
    NSData *gifData = [NSData dataWithContentsOfFile:gifPath];
    UIImage *placeholder = [UIImage sd_imageWithGIFData:gifData];
    
    weakSelf(self);
    [_imageContentView sd_setImageWithURL:[NSURL URLWithString:_messageModel.url]
                        placeholderImage:placeholder
                               completed:^(UIImage * _Nullable image, NSError * _Nullable error, SDImageCacheType cacheType, NSURL * _Nullable imageURL) {
        if (!error && image) {
            // 图片加载成功后可以更新布局（如果需要）
//            NSLog(@"UIImage------------5");
            CGImageRef cgImage = image.CGImage;
            CGFloat imageWidth = CGImageGetWidth(cgImage);
            CGFloat imageHeight = CGImageGetHeight(cgImage);
            CGFloat imageScale = imageWidth/imageHeight;
            CGFloat realWidth = 150 * imageScale;
            if(realWidth>220){
                realWidth=220;
                imageHeight=150;
            }
            else{
                imageHeight=150;
            }
            weakself.messageModel.mediaSize = CGSizeMake(realWidth, 150);
            [weakself.imageContentView mas_updateConstraints:^(MASConstraintMaker *make) {
                make.width.mas_equalTo(realWidth);
            }];
        }
    }];
    _currentContentView = _imageContentView;
}

- (void)setupVideoContent {
    _videoContentView.hidden = NO;
//    if (_thumbnailView.image) {
//        return;
//    }
    // 清除旧视图
    _thumbnailView.image  = nil;
    _loadingImg.image = nil;
    
    
    weakSelf(self);
    if (_messageModel.videoThumbnailImage) {
//        NSLog(@"videoThumbnailImage----:%@",_messageModel.videoThumbnailImage);
        _thumbnailView.image = _messageModel.videoThumbnailImage;
        [_thumbnailView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.edges.equalTo(_videoContentView);
        }];
    }else{
//        NSLog(@"videoThumbnailImage----load");
        [_messageModel generateThumbnailWithCompletion:^(UIImage * _Nonnull thumbnail) {
//            NSLog(@"111111---------------");
            if (thumbnail) {
//                NSLog(@"2222---------------");
                dispatch_async(dispatch_get_main_queue(), ^{
                    [weakself.thumbnailView mas_makeConstraints:^(MASConstraintMaker *make) {
                        make.edges.equalTo(self->_videoContentView);
                    }];
                    weakself.thumbnailView.image = thumbnail;
                });
            }
        }];
    }

    [_messageModel xiazaishipin:^(NSInteger persent) {
        if(persent>=100){
            dispatch_async(dispatch_get_main_queue(), ^{
                if(weakself.jinduLbl){
                    weakself.jinduLbl.alpha = 0;
                    weakself.loadingImg.alpha = 0;
                }
            });
            
            NSLog(@"下载完成：%@",self->_messageModel.localurl);
        }
        else{
//            NSLog(@"下载中：%ld",(long)persent);
            dispatch_async(dispatch_get_main_queue(), ^{
                if(weakself.jinduLbl){
                    if(weakself.loadingImg.alpha!=1||!weakself.loadingImg.image){
                        NSString *gifPath = [[NSBundle mainBundle] pathForResource:@"load" ofType:@"gif"];
                        NSData *gifData = [NSData dataWithContentsOfFile:gifPath];
                        UIImage *placeholder = [UIImage sd_imageWithGIFData:gifData];
                        weakself.loadingImg.image = placeholder;
                        weakself.loadingImg.alpha = 1;
                    }
                    weakself.jinduLbl.alpha = 1;
                    weakself.jinduLbl.text = [NSString stringWithFormat:@"%ld",(long)persent];
                }
            });
            
        }
    }];
    

    _messageModel.uploadPersentChange = ^(NSInteger index,NSInteger localtime) {
        
        if(localtime==weakself.messageModel.localtime){
            if(index>=100){
                dispatch_async(dispatch_get_main_queue(), ^{
                    if(weakself.jinduLbl){
                        weakself.jinduLbl.alpha = 0;
                        weakself.loadingImg.alpha = 0;
                    }
                });
            }
            else{
                dispatch_async(dispatch_get_main_queue(), ^{
                    if(weakself.jinduLbl){
                        if(weakself.loadingImg.alpha!=1||!weakself.loadingImg.image){
                            NSString *gifPath = [[NSBundle mainBundle] pathForResource:@"load" ofType:@"gif"];
                            NSData *gifData = [NSData dataWithContentsOfFile:gifPath];
                            UIImage *placeholder = [UIImage sd_imageWithGIFData:gifData];
                            weakself.loadingImg.image = placeholder;
                            weakself.loadingImg.alpha = 1;
                        }
                        weakself.jinduLbl.alpha = 1;
                        weakself.jinduLbl.text = [NSString stringWithFormat:@"%ld",(long)index];
                    }
                });
            }
        }
        else{
            dispatch_async(dispatch_get_main_queue(), ^{
                if(weakself.jinduLbl){
                    weakself.jinduLbl.alpha = 0;
                    weakself.loadingImg.alpha = 0;
                }
            });
        }
    };
    
    
    _currentContentView = _videoContentView;
}




- (void)setupFileContent {
    _fileContentView.hidden = NO;
    
    // 获取子视图
    UIImageView *iconView = _fileContentView.subviews[0];
    UILabel *nameLabel = _fileContentView.subviews[1];
    UILabel *sizeLabel = _fileContentView.subviews[2];
    
    // 设置文件内容
    iconView.image = [UIImage imageNamed: @"file_icon_black"];
    nameLabel.text = _messageModel.fileName ?: @"未知文件";
    
    sizeLabel.alpha = 0;

    
    [_messageModel xiazaiwenjian:^(NSInteger persent) {
//        NSLog(@"setupFileContent----------");
        if(persent>=100){
            NSLog(@"setupFileContent:下载完成：%@",self->_messageModel.localurl);
            dispatch_async(dispatch_get_main_queue(), ^{
                if(sizeLabel){
                    sizeLabel.alpha = 0;
                }
            });
        }
        else{
//            NSLog(@"setupFileContent 下载中：%ld",(long)persent);
            dispatch_async(dispatch_get_main_queue(), ^{
                if(sizeLabel){
                    sizeLabel.alpha = 1;
                    sizeLabel.text = [NSString stringWithFormat:@"%ld",(long)persent];
                }
            });
        }
    }];
    
    _currentContentView = _fileContentView;
}

- (void)setupVoiceContent {
    _voiceContentView.hidden = NO;
    
    // 获取子视图
    UIImageView *voiceIcon = _voiceContentView.subviews[0];
    UILabel *durationLabel = _voiceContentView.subviews[1];
    voiceIcon.animationDuration = 1.f;
    voiceIcon.animationRepeatCount = 0;
    
    // 设置语音内容
    voiceIcon.image = [UIImage imageNamed:_messageModel.isSender ? @"yuyinR" : @"yuyinL"];
    durationLabel.text = [NSString stringWithFormat:@"%ld\"", (long)_messageModel.voiceDuration];
    
    // 根据发送方调整布局
    if (_messageModel.isSender) {
        [voiceIcon mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(_voiceContentView).offset(-8);
            make.centerY.equalTo(_voiceContentView);
            make.width.height.mas_equalTo(20);
        }];
        
        [durationLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(voiceIcon.mas_left).offset(-8);
            make.centerY.equalTo(_voiceContentView);
        }];
        
        voiceIcon.animationImages = @[kImageMake(@"audio_sender_animate1"),kImageMake(@"audio_sender_animate2"),kImageMake(@"audio_sender_animate3")];
        
    } else {
        [voiceIcon mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(_voiceContentView).offset(8);
            make.centerY.equalTo(_voiceContentView);
            make.width.height.mas_equalTo(20);
        }];
        
        [durationLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(voiceIcon.mas_right).offset(8);
            make.centerY.equalTo(_voiceContentView);
        }];
        voiceIcon.animationImages = @[kImageMake(@"audio_receiver_animate1"),kImageMake(@"audio_receiver_animate2"),kImageMake(@"audio_receiver_animate3")];
    }
    
    [_messageModel xiazaiyuyin:^(NSInteger persent) {
//        NSLog(@"setupFileContent----------");
        if(persent>=100){
            NSLog(@"setupFileContent:下载完成：%@",self->_messageModel.localurl);
        }
        else{
//            NSLog(@"setupFileContent 下载中：%ld",(long)persent);
        }
    }];
    
    
    _currentContentView = _voiceContentView;
}

- (void)setupCallContent {
    _callContentView.hidden = NO;
    
    // 获取子视图
    UIImageView *callIcon = _callContentView.subviews[0];
    UILabel *callLabel = _callContentView.subviews[1];
    UILabel *durationLabel = _callContentView.subviews[2];
    
    // 设置通话记录内容
    callIcon.image = [UIImage imageNamed:_messageModel.isVideo ? @"vedio_call_icon" : @"audio_call_icon"];
    callLabel.text = _messageModel.isCallSuccess ? @"通话时长" : @"未接通";
    durationLabel.text = _messageModel.isCallSuccess ? [self formatTimeWithMilliseconds:_messageModel.callDuration] : @"";
    
    _currentContentView = _callContentView;
}

- (void)setupHistoryContent {
    _historyContentView.hidden = NO;
    
    // 获取子视图
    UILabel *titleLabel = _historyContentView.subviews[0];
    UILabel *contentLabel = (UILabel *)_historyContentView.subviews[1];
    
    // 设置聊天记录内容
    titleLabel.text = @"聊天记录";
    
    NSArray * msgArray = _messageModel.forwardMsgArray;
    NSMutableArray * contentArray = [NSMutableArray array];
    
    for (NSDictionary * dict in msgArray) {
        NSString * messageType = dict[@"messageType"];
        NSString * nickName = dict[@"fromName"]?:@"";
        
        NSString * recordString = @"";
        switch ([messageType integerValue]) {
            case 0:
//                recordString = [NSString stringWithFormat:@"%@：%@\n",nickName,dict[@"content"]?:@""];
                recordString = [NSString stringWithFormat:@"%@：%@\n",nickName,[CryptoAES.shareInstance decryptDataL:dict[@"content"]]];
                break;
            case 1:
                recordString = [NSString stringWithFormat:@"%@：【图片】\n",nickName];;
                break;
            case 2:
                recordString = [NSString stringWithFormat:@"%@：【文件】\n",nickName];
                break;
            case 3:
                recordString = [NSString stringWithFormat:@"%@：【语音】\n",nickName];
                break;
            case 5:
                recordString = [NSString stringWithFormat:@"%@：【视频】\n",nickName];
                break;
            case 6:
                recordString = [NSString stringWithFormat:@"%@：【转发】\n",nickName];
                break;
            case 7:
                recordString = [NSString stringWithFormat:@"%@：【通话】\n",nickName];
                break;
            default:
                break;
        }
        [contentArray addObject:recordString];
        
        if (msgArray.lastObject == dict) {
            NSString * contentString = [contentArray componentsJoinedByString:@""];
            NSMutableAttributedString *content = [[NSMutableAttributedString alloc] initWithString:contentString ?: @""];
            contentLabel.attributedText = content;
        }
        
    }
    
    _currentContentView = _historyContentView;
}

- (void)setupEventContent {
    _eventLbl.hidden = NO;
    _eventLbl.text = _messageModel.content;
    
    [_eventLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
        make.height.mas_equalTo(24);
        make.centerX.mas_equalTo(self.contentView.mas_centerX);
        make.centerY.mas_equalTo(self.contentView.mas_centerY);
    }];
    [_eventLbl sizeToFit];
    _currentContentView = _eventLbl;
}

- (void)setupCallbackContent {
    _callbackLbl.hidden = NO;
    _callbackLbl.text = _messageModel.isSender ? @"你撤回了一条消息":[NSString stringWithFormat:@"%@撤回了一条消息",_messageModel.nickName];
    [_callbackLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
        make.height.mas_equalTo(24);
        make.centerX.mas_equalTo(self.contentView.mas_centerX);
        make.centerY.mas_equalTo(self.contentView.mas_centerY);
    }];
    _currentContentView = _callbackLbl;
}

- (void)setupDeleateContent {
    _deleateLbl.hidden = NO;
    _deleateLbl.text = @"你删除了一条消息！";
    [_deleateLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
        make.height.mas_equalTo(24);
        make.centerX.mas_equalTo(self.contentView.mas_centerX);
        make.centerY.mas_equalTo(self.contentView.mas_centerY);
    }];
    _currentContentView = _deleateLbl;
}

#pragma mark - 布局方法
- (void)layoutContentViews {
    if (_messageModel.messageType == ChatMessageTypeEvent || _messageModel.messageType == ChatMessageTypeCallBack || _messageModel.messageType == ChatMessageTypeCallBack2) {
        return;
    }
    
    //复选框布局
//    self.batchStateBtn.frame=CGRectMake(20, 10, 32, 32);
    
    [self.batchStateBtn mas_remakeConstraints:^(MASConstraintMaker *make) {
        make.size.mas_equalTo(CGSizeMake(32, 32));
        make.left.mas_equalTo(20);
        make.top.mas_equalTo(10);
    }];
    
    // 头像布局
    if (_messageModel.isSender) {
        [_avatarImageView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(self.contentView).offset(-kAvatarMargin);
            make.top.equalTo(self.contentView).offset(kVerticalMargin);
            make.width.height.mas_equalTo(kAvatarSize);
        }];
        
        [_nameLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(_avatarImageView.mas_left).offset(-4);
            make.top.equalTo(_avatarImageView);
            make.left.greaterThanOrEqualTo(self.contentView).offset(10);
        }];
        
        [_timeLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.height.mas_equalTo(14);
            make.right.mas_equalTo(self.nameLabel.mas_left).offset(-12);
            make.top.mas_equalTo(self.avatarImageView);
        }];
        
        if (_messageModel.messageType == ChatMessageTypeImage || _messageModel.messageType == ChatMessageTypeVideo) {
            [_readStateLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
                make.right.mas_equalTo(self.contentView).offset(-30);
                make.height.mas_equalTo(14);
                make.top.mas_equalTo(self.currentContentView.mas_bottom).offset(2);
            }];
        }else{
            if (!_quoteLbl.hidden) {
                [_readStateLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
                    make.right.mas_equalTo(self.contentView).offset(-30);
                    make.height.mas_equalTo(14);
                    make.top.mas_equalTo(self.quoteLbl.mas_bottom);
                }];
            }else{
                [_readStateLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
                    make.right.mas_equalTo(self.contentView).offset(-30);
                    make.height.mas_equalTo(14);
                    make.top.mas_equalTo(self.bubbleImageView.mas_bottom);
                }];
            }
            
        }
    } else {
        [_avatarImageView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(self.contentView).offset(kAvatarMargin);
            make.top.equalTo(self.contentView).offset(kVerticalMargin);
            make.width.height.mas_equalTo(kAvatarSize);
        }];
        
        [_nameLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(_avatarImageView.mas_right).offset(4);
            make.top.equalTo(_avatarImageView);
            make.right.lessThanOrEqualTo(self.contentView).offset(-10);
        }];
        
        [_timeLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.height.mas_equalTo(14);
            make.left.mas_equalTo(self.nameLabel.mas_right).offset(12);
            make.top.mas_equalTo(self.avatarImageView);
        }];
    }
    
    // 内容视图布局
    [self layoutCurrentContentView];
    
    // 气泡背景布局
    if (!_bubbleImageView.hidden) {
        NSAssert(_currentContentView, @"currentContentView 不能为 nil");
        NSAssert(_currentContentView.superview, @"currentContentView 必须已添加到父视图");
        [_bubbleImageView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.edges.equalTo(_currentContentView).insets(UIEdgeInsetsMake(-kTextVerticalMargin, -kTextHorizontalMargin, -kTextVerticalMargin, -kTextHorizontalMargin));
        }];
        [self.contentView sendSubviewToBack:_bubbleImageView];
    }
    
}

- (void)layoutCurrentContentView {
    switch (_messageModel.messageType) {
        case ChatMessageTypeText:
            [self layoutTextContent];
            break;
        case ChatMessageTypeImage:
            [self layoutImageContent];
            break;
        case ChatMessageTypeVideo:
            [self layoutVideoContent];
            break;
        case ChatMessageTypeVoice:
            [self layoutVioceContent];
            break;
        case ChatMessageTypeCall:
            [self layoutCallContent];
            break;
        case ChatMessageTypeHistory:
            [self layoutHistoryContent];
            break;
        default:
            [self layoutOtherContent];
            break;
    }
}

- (void)layoutTextContent {
    CGSize textSize = [self calculateTextSize];
    
    if (_messageModel.isSender) {
        [_textLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(_avatarImageView.mas_left).offset(-26);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_equalTo(textSize.width);
            make.height.mas_equalTo(textSize.height);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
        
        if (_messageModel.quoteMessage) {
            [_quoteLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
                make.height.mas_equalTo(20);
                make.top.mas_equalTo(_textLbl.mas_bottom).offset(20);
                make.right.mas_equalTo(_textLbl.mas_right).offset(6);
                make.width.mas_lessThanOrEqualTo(kContentMaxWidth);
            }];
        }
    } else {
        [_textLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(_avatarImageView.mas_right).offset(26);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_equalTo(textSize.width);
            make.height.mas_equalTo(textSize.height);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
        
        if (_messageModel.quoteMessage) {
            [_quoteLbl mas_remakeConstraints:^(MASConstraintMaker *make) {
                make.height.mas_equalTo(20);
                make.top.mas_equalTo(_textLbl.mas_bottom).offset(20);
                make.left.mas_equalTo(_textLbl.mas_left).offset(-6);
                make.width.mas_lessThanOrEqualTo(kContentMaxWidth);
            }];
        }
    }
}

- (void)layoutImageContent {
//    CGSize imageSize = [self adjustMediaSize:_messageModel.mediaSize];
    CGSize imageSize = _messageModel.mediaSize;
    
    if (_messageModel.isSender) {
        [_imageContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(_avatarImageView.mas_left).offset(-16);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_equalTo(imageSize.width);
            make.height.mas_equalTo(imageSize.height);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
    } else {
        [_imageContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(_avatarImageView.mas_right).offset(16);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_equalTo(imageSize.width);
            make.height.mas_equalTo(imageSize.height);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
    }
}

- (void)layoutVideoContent {
    CGSize videoSize = [self adjustMediaSize:_messageModel.mediaSize];
    
    if (_messageModel.isSender) {
        [_videoContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(_avatarImageView.mas_left).offset(-16);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_equalTo(videoSize.width);
            make.height.mas_equalTo(videoSize.height);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
    } else {
        [_videoContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(_avatarImageView.mas_right).offset(16);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_equalTo(videoSize.width);
            make.height.mas_equalTo(videoSize.height);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
    }
}

- (void)layoutVioceContent {
    // 设置内容视图约束
    [_voiceContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
        if (_messageModel.isSender) {
            make.right.equalTo(_avatarImageView.mas_left).offset(-26);
        } else {
            make.left.equalTo(_avatarImageView.mas_right).offset(26);
        }
        make.top.equalTo(_avatarImageView).offset(28);
        make.width.mas_equalTo(_messageModel.voiceWidth);
        make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
    }];
}

- (void)layoutCallContent {
    // 获取子视图
    UIImageView *callIcon = _callContentView.subviews[0];
    UILabel *callLabel = _callContentView.subviews[1];
    UILabel *durationLabel = _callContentView.subviews[2];
    
    if (_messageModel.isSender) {
        [_callContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(_avatarImageView.mas_left).offset(-26);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_lessThanOrEqualTo(kContentMaxWidth);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
    } else {
        [_callContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(_avatarImageView.mas_right).offset(26);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_lessThanOrEqualTo(kContentMaxWidth);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
    }
    
    if (_messageModel.isCallSuccess) {
        
        [callLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(callIcon.mas_right).offset(8);
            make.top.equalTo(_callContentView).offset(8);
        }];
        
        [durationLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(callLabel.mas_right).offset(8);
            make.top.equalTo(callLabel);
            make.right.equalTo(_callContentView).offset(-8);
            make.bottom.equalTo(_callContentView).offset(-8);
        }];
    }else{
        
        [callLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(callIcon.mas_right).offset(8);
            make.top.equalTo(_callContentView).offset(8);
            make.width.mas_lessThanOrEqualTo(50);
            make.right.equalTo(_callContentView).offset(-8);
        }];
    }
}

- (void)layoutHistoryContent {
    [_historyContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
        if (_messageModel.isSender) {
            make.right.equalTo(_avatarImageView.mas_left).offset(-26);
        } else {
            make.left.equalTo(_avatarImageView.mas_right).offset(26);
        }
        make.top.equalTo(_avatarImageView).offset(28);
        make.width.mas_equalTo(160);
        make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
    }];
}

- (void)layoutOtherContent {
    if (_messageModel.isSender) {
        [_currentContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(_avatarImageView.mas_left).offset(-26);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_lessThanOrEqualTo(kContentMaxWidth);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
    } else {
        [_currentContentView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(_avatarImageView.mas_right).offset(26);
            make.top.mas_equalTo(_avatarImageView.mas_top).offset(28);
            make.width.mas_lessThanOrEqualTo(kContentMaxWidth);
            make.bottom.equalTo(self.contentView).offset(-kVerticalMargin).priorityHigh();
        }];
    }
    
}

- (CGSize)adjustMediaSize:(CGSize)originalSize {
    CGFloat maxWidth = kContentMaxWidth;
    CGFloat maxHeight = 200.0f;
    
    if (originalSize.width <= 0 || originalSize.height <= 0) {
        return CGSizeMake(maxWidth, maxWidth * 0.6);
    }
    
    CGFloat ratio = originalSize.width / originalSize.height;
    CGFloat adjustedWidth = maxWidth;
    CGFloat adjustedHeight = adjustedWidth / ratio;
    
    if (adjustedHeight > maxHeight) {
        adjustedHeight = maxHeight;
        adjustedWidth = adjustedHeight * ratio;
    }
    
    return CGSizeMake(adjustedWidth, adjustedHeight);
}

+ (CGSize)otherAdjustMediaSize:(CGSize)originalSize {
    CGFloat maxWidth = kContentMaxWidth;
    CGFloat maxHeight = 200.0f;
    
    if (originalSize.width <= 0 || originalSize.height <= 0) {
        return CGSizeMake(maxWidth, maxWidth * 0.6);
    }
    
    CGFloat ratio = originalSize.width / originalSize.height;
    CGFloat adjustedWidth = maxWidth;
    CGFloat adjustedHeight = adjustedWidth / ratio;
    
    if (adjustedHeight > maxHeight) {
        adjustedHeight = maxHeight;
        adjustedWidth = adjustedHeight * ratio;
    }
    
    return CGSizeMake(adjustedWidth, adjustedHeight);
}

- (CGSize)calculateTextSize{
    
    NSString *text = _messageModel.content ?: @"";
    
    UILabel *label = [[UILabel alloc] init];
    label.font = [UIFont systemFontOfSize:18.0]; // 设置字体大小
    label.numberOfLines = 0; // 设置为0表示不限制行数
    label.text = text; // 设置文本内容
    label.preferredMaxLayoutWidth = kContentMaxWidth; // 设置固定宽度
    CGSize size = [label sizeThatFits:CGSizeMake(kContentMaxWidth, CGFLOAT_MAX)];
    
    CGSize textSize = size;
//    NSLog(@"文本宽度: %f, 文本高度: %f", textSize.width, textSize.height);
    return textSize;
}

- (NSString *)formatTimeWithMilliseconds:(NSInteger)milliseconds{
    NSInteger seconds = milliseconds / 1000.0;
        
    if (seconds >= 60) {
        // 大于等于60秒时显示为分钟，保留一位小数
        NSInteger minutes = seconds / 60.0;
        NSInteger sc = seconds%60;
        return [NSString stringWithFormat:@"%ld分%ld秒", (long)minutes,(long)sc];
    } else {
        // 小于60秒时显示为秒，保留整数
        return [NSString stringWithFormat:@"%ld秒", seconds];
    }
}

#pragma mark 列表事件处理

- (void)handleImageTap {
    if (_messageModel.messageType == ChatMessageTypeImage) {
        // 处理图片点击
        NSLog(@"点击了图片: %@", _messageModel.url);
        if(_messageModel.fileError==1){
            weakSelf(self);
            if(weakself.bubbleCellLongPressMenuBlock){
                weakself.bubbleCellLongPressMenuBlock(8);
            }
            return;
        }
        if (_messageModel.url.length == 0 && !_messageModel.isSender) {
            [MBProgressHUD showWithText:@"图片正在上传"];
            return;
        }
        
        [FilePreviewer.shared previewFileWithLocalPath:_messageModel.localurl remoteURL:getURL(_messageModel.url) fromViewController:self.parentViewController];
    }
}

- (void)handleVideoTap {
    if (_messageModel.messageType == ChatMessageTypeVideo) {
        // 处理视频点击
        NSLog(@"点击了视频: %@", _messageModel.url);
        if(_messageModel.fileError==1){
            weakSelf(self);
            if(weakself.bubbleCellLongPressMenuBlock){
                weakself.bubbleCellLongPressMenuBlock(8);
            }
            return;
        }
        if (_messageModel.url.length == 0 && !_messageModel.isSender) {
            [MBProgressHUD showWithText:@"视频正在上传"];
            return;
        }
        [FilePreviewer.shared previewFileWithLocalPath:_messageModel.localurl remoteURL:getURL(_messageModel.url) fromViewController:self.parentViewController];
    }
}

- (void)handleFileTap {
    if (_messageModel.messageType == ChatMessageTypeFile) {
        // 处理视频点击
        NSLog(@"点击了文件: %@", _messageModel.url);
        if(_messageModel.fileError==1){
            weakSelf(self);
            if(weakself.bubbleCellLongPressMenuBlock){
                weakself.bubbleCellLongPressMenuBlock(8);
            }
            return;
        }
        if (_messageModel.url.length == 0 && !_messageModel.isSender) {
            [MBProgressHUD showWithText:@"文件正在上传"];
            return;
        }
        [FilePreviewer.shared previewFileWithLocalPath:_messageModel.localurl remoteURL:getURL(_messageModel.url) fromViewController:self.parentViewController];
    }
}

- (void)handleVoiceTap {
    UIImageView *voiceIcon = _voiceContentView.subviews[0];
    if (_messageModel.messageType == ChatMessageTypeVoice) {
        // 处理语音点击
        NSLog(@"点击了语音: %@", _messageModel.url);
        
        if (self.player) {
            AVPlayerItem *playerItem = self.player.currentItem;
            CMTime currentTime = playerItem.currentTime;
            CMTime duration = playerItem.duration;
            [voiceIcon stopAnimating];
            if (self.player.rate == 0.0) {
                if (CMTimeCompare(currentTime, duration) == 0 ||
                    CMTimeCompare(currentTime, duration) == 1) {
                    // 播放完毕
                    NSLog(@"Playback finished");
                } else {
                    // 暂停
                    NSLog(@"Playback paused");
                    [self.player play];
                    return;
                }
            } else {
                // 正在播放
                NSLog(@"Playback in progress");
                [self.player pause];
                return;
            }
        }
        
        
        NSString *urlstr = _messageModel.url;
        NSURL *Url = [NSURL URLWithString:urlstr];
        
        NSLog(@"本地路径:%@",_messageModel.localurl);
        if (_messageModel.localurl && [[NSFileManager defaultManager] fileExistsAtPath:_messageModel.localurl]) {
            NSLog(@"本地路径:");
            urlstr=_messageModel.localurl;
            Url = [NSURL fileURLWithPath:urlstr];
        }
        else{
            
        }
        NSLog(@"播放: %@", Url);
        
        AVAudioSession *audioSession = [AVAudioSession sharedInstance];
        [audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
        [audioSession setActive:YES error:nil];
        AVPlayerItem *pitem = [AVPlayerItem playerItemWithURL:Url];
        
        //AVPlayerItem *pitem = [[AVPlayerItem alloc] initWithURL:Url];
        
        _player = [AVPlayer playerWithPlayerItem:pitem];
        [[UIDevice currentDevice] setProximityMonitoringEnabled:YES]; //建议在播放之前设置yes，播放结束设置NO。这个功能是开启红外感应
        [_player play];
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(playerItemDidReachEnd:)
                                                     name:AVPlayerItemDidPlayToEndTimeNotification
                                                   object:pitem];
        [voiceIcon startAnimating];
    }
}

- (void)playerItemDidReachEnd:(NSNotification *)notification {
    // 播放结束时的处理代码
    UIImageView *voiceIcon = _voiceContentView.subviews[0];
    [voiceIcon stopAnimating];
    NSLog(@"播放结束:%@",notification);
    [[UIDevice currentDevice] setProximityMonitoringEnabled:NO]; //建议在播放之前设置yes，播放结束设置NO。这个功能是开启红外感应
    [[NSNotificationCenter defaultCenter] removeObserver:self name:notification.name object:notification.object];
    //可以执行继续播放下一条操作
    
}

- (void)handleHistoryTap {
    ChatRecordController * recordVc = [[ChatRecordController alloc] init];
    for (NSDictionary * dict in _messageModel.forwardMsgArray) {
        [recordVc.dataArray addObject:[ChatMessageModel modelWithDictionary:dict]];
    }
    UINavigationController * navi = [[UINavigationController alloc] initWithRootViewController:recordVc];
    navi.modalPresentationStyle = UIModalPresentationFullScreen;
    [self.parentViewController presentViewController:navi animated:YES completion:nil];
}

- (void)handleQuoteTap{
    NSLog(@"handleQuoteTap----：%@",[_messageModel.quoteMessage class]);
    if(![_messageModel.quoteMessage isKindOfClass:[ChatMessageModel class]]){
        return;
    }
    if (_messageModel.quoteMessage.messageType == ChatMessageTypeText) {
        QuoteDetailController * quoteDetailVc = [[QuoteDetailController alloc] init];
        quoteDetailVc.quotedContent = _messageModel.quoteMessage.content;
        quoteDetailVc.quotedSenderName = _messageModel.quoteMessage.nickName;
        
        UINavigationController * navi = [[UINavigationController alloc] initWithRootViewController:quoteDetailVc];
        navi.modalPresentationStyle = UIModalPresentationFullScreen;
        [self.parentViewController presentViewController:navi animated:YES completion:nil];
    }else if (_messageModel.quoteMessage.messageType == ChatMessageTypeImage) {
        [FilePreviewer.shared previewFileWithLocalPath:_messageModel.quoteMessage.url remoteURL:getURL(_messageModel.quoteMessage.url) fromViewController:self.parentViewController];
    }else if (_messageModel.quoteMessage.messageType == ChatMessageTypeVoice) {
        [FilePreviewer.shared previewFileWithLocalPath:_messageModel.quoteMessage.url remoteURL:getURL(_messageModel.quoteMessage.url) fromViewController:self.parentViewController];
    }else if (_messageModel.quoteMessage.messageType == ChatMessageTypeFile) {
        [FilePreviewer.shared previewFileWithLocalPath:_messageModel.quoteMessage.url remoteURL:getURL(_messageModel.quoteMessage.url) fromViewController:self.parentViewController];
    }else if (_messageModel.quoteMessage.messageType == ChatMessageTypeVoice) {
        
    }
}

- (void)handleAvatarTap {
    !self.avatarTapBlock?:self.avatarTapBlock(_messageModel);
}


#pragma mark - 高度计算
+ (CGFloat)cellHeightForMessage:(ChatMessageModel *)message {
    // 如果有缓存高度，直接返回
    if (message.cellHeight > 0) {
        return message.cellHeight;
    }
    
    CGFloat height = 0;
    CGFloat contentHeight = 0;
    CGFloat horizontalMargin = 12.0f;
    CGFloat verticalMargin = 10.0f;
    CGFloat maxWidth = kContentMaxWidth - 2 * horizontalMargin;
    // 计算内容高度
    switch (message.messageType) {
        case ChatMessageTypeText: {
            NSString *text = message.content ?: @"";
            UIFont *font = [UIFont systemFontOfSize:17]; // 设置字体大小
            CGSize maximumSize = CGSizeMake(maxWidth, CGFLOAT_MAX); // 设置最大宽度，高度设为CGFLOAT_MAX表示不限制高度
             
            NSDictionary *attributes = @{NSFontAttributeName: font};
            CGRect rect = [text boundingRectWithSize:maximumSize
                                             options:NSStringDrawingUsesLineFragmentOrigin
                                          attributes:attributes
                                             context:nil];
             
            CGFloat height = rect.size.height;
            
            contentHeight = height + 2 * verticalMargin;
            contentHeight = MAX(contentHeight, kMinBubbleHeight);
            
            if (message.quoteMessage) {
                contentHeight = contentHeight + 30;
            }
            
            break;
        }
        case ChatMessageTypeImage:
        case ChatMessageTypeVideo: {
            CGSize mediaSize = [self otherAdjustMediaSize:message.mediaSize];
            contentHeight = mediaSize.height;
            break;
        }
        case ChatMessageTypeFile:
            contentHeight = 60.0f;
            break;
        case ChatMessageTypeCallBack:
            contentHeight = 20.f;
            break;
            
        case ChatMessageTypeVoice:
            contentHeight = 30.0f;
            break;
        case ChatMessageTypeCall:
            contentHeight = 40.0f;
            break;
        case ChatMessageTypeHistory:
            contentHeight = 80.0f;
            break;
        case ChatMessageTypeEvent:
            contentHeight = 20.f;
            break;
        case ChatMessageTypeCallBack2:
            contentHeight = 20.f;
            break;
        case ChatMessageTypeDel:
            contentHeight = 20.f;
            break;
    }
    
    // 总高度 = 内容高度 + 上下边距
    height = contentHeight + kBubbleTopMargin+kBubbleBottomMargin;
    
    // 缓存高度
    message.cellHeight = height;
    
    return height;
}

+ (void)precalculateHeightForMessage:(ChatMessageModel *)message completion:(void(^)(CGFloat height))completion {
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        CGFloat height = [self cellHeightForMessage:message];
        dispatch_async(dispatch_get_main_queue(), ^{
            if (completion) completion(height);
        });
    });
}



@end