//
//  KBChatUserMessageCell.m
//  keyBoard
//
//  Created by Kiro on 2026/1/23.
//

#import "KBChatUserMessageCell.h"
#import "KBAiChatMessage.h"
#import <Masonry/Masonry.h>

@interface KBChatUserMessageCell ()

@property (nonatomic, strong) UIView *bubbleView;
@property (nonatomic, strong) UILabel *messageLabel;
@property (nonatomic, strong) UIActivityIndicatorView *loadingIndicator;

@end

@implementation KBChatUserMessageCell

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

- (void)setupUI {
    // 气泡视图
    self.bubbleView = [[UIView alloc] init];
    self.bubbleView.backgroundColor = [UIColor colorWithRed:0.94 green:0.94 blue:0.94 alpha:1.0];
    self.bubbleView.layer.cornerRadius = 16;
    self.bubbleView.layer.masksToBounds = YES;
    [self.contentView addSubview:self.bubbleView];
    
    // 消息标签
    self.messageLabel = [[UILabel alloc] init];
    self.messageLabel.numberOfLines = 0;
    self.messageLabel.font = [UIFont systemFontOfSize:16];
    self.messageLabel.textColor = [UIColor blackColor];
    self.messageLabel.textAlignment = NSTextAlignmentLeft;
    [self.bubbleView addSubview:self.messageLabel];
    
    // 加载指示器
    self.loadingIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
    self.loadingIndicator.hidesWhenStopped = YES;
    [self.contentView addSubview:self.loadingIndicator];
    
    // 布局约束
    [self.bubbleView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.contentView).offset(4);
        make.bottom.equalTo(self.contentView).offset(-4);
        make.right.equalTo(self.contentView).offset(-16);
        make.width.lessThanOrEqualTo(self.contentView).multipliedBy(0.75);
        // 最小高度约束，确保 loading 时气泡不消失
        make.height.greaterThanOrEqualTo(@40);
        make.width.greaterThanOrEqualTo(@50);
    }];
    
    [self.messageLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.bubbleView).offset(10);
        make.bottom.equalTo(self.bubbleView).offset(-10);
        make.left.equalTo(self.bubbleView).offset(12);
        make.right.equalTo(self.bubbleView).offset(-12);
    }];
    
    [self.loadingIndicator mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(self.contentView);
        make.right.equalTo(self.contentView).offset(-16);
    }];
}

- (void)configureWithMessage:(KBAiChatMessage *)message {
    self.messageLabel.text = message.text;
    [self updateMessageAlignmentForText:message.text];

    if (message.isLoading) {
        self.bubbleView.hidden = YES;
        [self.loadingIndicator startAnimating];
    } else {
        self.bubbleView.hidden = NO;
        self.messageLabel.hidden = NO;
        [self.loadingIndicator stopAnimating];
    }
}

- (void)updateMessageAlignmentForText:(NSString *)text {
    if (self.messageLabel.hidden || text.length == 0) {
        return;
    }
    
    if ([text rangeOfString:@"\n"].location != NSNotFound) {
        self.messageLabel.textAlignment = NSTextAlignmentLeft;
        return;
    }
    
    CGSize singleLineSize = [text sizeWithAttributes:@{NSFontAttributeName: self.messageLabel.font}];
    CGFloat minBubbleWidth = 50.0;
    CGFloat padding = 24.0;
    if (singleLineSize.width + padding <= minBubbleWidth + 0.5) {
        self.messageLabel.textAlignment = NSTextAlignmentCenter;
    } else {
        self.messageLabel.textAlignment = NSTextAlignmentLeft;
    }
}

@end