//
//  KBAIMessageChatingVC.m
//  keyBoard
//
//  Created by Mac on 2026/1/28.
//

#import "KBAIMessageChatingVC.h"
#import "AiVM.h"
#import "KBChattedCompanionModel.h"
#import "KBHUD.h"
#import "KBAIChatMessageCacheManager.h"
#import <Masonry/Masonry.h>

/// 聊天会话被重置的通知
static NSString * const KBChatSessionDidResetNotification = @"KBChatSessionDidResetNotification";

@interface KBAIMessageChatingVC ()

@property (nonatomic, strong) AiVM *viewModel;
@property (nonatomic, strong) NSMutableArray<KBChattedCompanionModel *> *chattedList;

/// 删除按钮
@property (nonatomic, strong) UIButton *deleteButton;
/// 当前长按的 indexPath
@property (nonatomic, strong) NSIndexPath *longPressIndexPath;

@end

@implementation KBAIMessageChatingVC

#pragma mark - Lifecycle

- (void)viewDidLoad {
    self.listType = 1; // Chatting
    [super viewDidLoad];
    
    // 添加长按手势
    [self setupLongPressGesture];
    
    // 添加点击手势，用于隐藏删除按钮
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)];
    tapGesture.cancelsTouchesInView = NO; // 不影响 cell 的点击
    [self.tableView addGestureRecognizer:tapGesture];
}

#pragma mark - 手势处理

- (void)setupLongPressGesture {
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
    longPress.minimumPressDuration = 0.5; // 长按0.5秒
    [self.tableView addGestureRecognizer:longPress];
}

- (void)handleLongPress:(UILongPressGestureRecognizer *)gesture {
    if (gesture.state == UIGestureRecognizerStateBegan) {
        CGPoint point = [gesture locationInView:self.tableView];
        NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:point];
        
        if (indexPath) {
            // 在手指位置显示删除按钮
            [self showDeleteButtonAtPoint:point];
            
            // 在 showDeleteButtonAtPoint 之后再设置，避免被 hideDeleteButton 清空
            self.longPressIndexPath = indexPath;
        }
    }
}

- (void)handleTapGesture:(UITapGestureRecognizer *)gesture {
    // 点击其他地方隐藏删除按钮
    if (self.deleteButton && !self.deleteButton.hidden) {
        CGPoint pointInButton = [gesture locationInView:self.deleteButton];
        
        // 如果点击的不是删除按钮，则隐藏
        if (!CGRectContainsPoint(self.deleteButton.bounds, pointInButton)) {
            NSLog(@"[KBAIMessageChatingVC] 点击了删除按钮外部，隐藏按钮");
            [self hideDeleteButton];
        } else {
            NSLog(@"[KBAIMessageChatingVC] 点击了删除按钮内部，不隐藏");
        }
    }
}

- (void)showDeleteButtonAtPoint:(CGPoint)point {
    // 隐藏之前的按钮
    [self hideDeleteButton];
    
    // 创建删除按钮
    if (!self.deleteButton) {
        self.deleteButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [self.deleteButton setTitle:@"删除此记录" forState:UIControlStateNormal];
        [self.deleteButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        self.deleteButton.titleLabel.font = [UIFont systemFontOfSize:14];
        self.deleteButton.backgroundColor = [UIColor colorWithRed:244/255.0 green:67/255.0 blue:54/255.0 alpha:1.0]; // #F44336
        self.deleteButton.layer.cornerRadius = 6;
        self.deleteButton.layer.masksToBounds = YES;
        [self.deleteButton addTarget:self action:@selector(deleteButtonTapped) forControlEvents:UIControlEventTouchUpInside];
        
        // 添加阴影效果
        self.deleteButton.layer.shadowColor = [UIColor blackColor].CGColor;
        self.deleteButton.layer.shadowOffset = CGSizeMake(0, 2);
        self.deleteButton.layer.shadowOpacity = 0.3;
        self.deleteButton.layer.shadowRadius = 4;
    }
    
    // 添加到父视图（确保在最上层）
    [self.view addSubview:self.deleteButton];
    
    // 设置按钮大小和位置
    CGSize buttonSize = CGSizeMake(110, 40);
    
    // 将 tableView 的坐标转换为父视图坐标
    CGPoint pointInView = [self.tableView convertPoint:point toView:self.view];
    
    // 计算按钮位置，确保不超出屏幕
    CGFloat buttonX = pointInView.x - buttonSize.width / 2;
    CGFloat buttonY = pointInView.y - buttonSize.height - 10; // 在手指上方10px
    
    // 边界检查
    CGFloat margin = 10;
    if (buttonX < margin) {
        buttonX = margin;
    } else if (buttonX + buttonSize.width > self.view.bounds.size.width - margin) {
        buttonX = self.view.bounds.size.width - buttonSize.width - margin;
    }
    
    if (buttonY < KB_NAV_TOTAL_HEIGHT + margin) {
        // 如果上方空间不够，显示在手指下方
        buttonY = pointInView.y + 10;
    }
    
    [self.deleteButton mas_remakeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.view).offset(buttonX);
        make.top.equalTo(self.view).offset(buttonY);
        make.width.mas_equalTo(buttonSize.width);
        make.height.mas_equalTo(buttonSize.height);
    }];
    
    self.deleteButton.hidden = NO;
    
    // 添加弹出动画
    self.deleteButton.transform = CGAffineTransformMakeScale(0.3, 0.3);
    self.deleteButton.alpha = 0;
    [UIView animateWithDuration:0.2 delay:0 usingSpringWithDamping:0.7 initialSpringVelocity:0.5 options:UIViewAnimationOptionCurveEaseOut animations:^{
        self.deleteButton.transform = CGAffineTransformIdentity;
        self.deleteButton.alpha = 1.0;
    } completion:nil];
}

- (void)hideDeleteButton {
    if (self.deleteButton) {
        [UIView animateWithDuration:0.15 animations:^{
            self.deleteButton.alpha = 0;
            self.deleteButton.transform = CGAffineTransformMakeScale(0.8, 0.8);
        } completion:^(BOOL finished) {
            self.deleteButton.hidden = YES;
            [self.deleteButton removeFromSuperview];
        }];
    }
    self.longPressIndexPath = nil;
}

- (void)deleteButtonTapped {
    if (!self.longPressIndexPath) {
        return;
    }
    
    // 保存 indexPath，因为后面会清空
    NSIndexPath *indexPath = self.longPressIndexPath;
    
    // 获取要删除的数据
    if (indexPath.row >= self.chattedList.count) {
        NSLog(@"[KBAIMessageChatingVC] 错误：索引越界，row=%ld, count=%ld", 
              (long)indexPath.row, (long)self.chattedList.count);
        [self hideDeleteButton];
        return;
    }
    
    KBChattedCompanionModel *model = self.chattedList[indexPath.row];
    NSInteger companionId = model.companionId;
    
    NSLog(@"[KBAIMessageChatingVC] 开始删除聊天记录：companionId=%ld, name=%@", 
          (long)companionId, model.name);
    
    // 隐藏删除按钮
    [self hideDeleteButton];
    
    // 显示加载提示
    [KBHUD show];
    
    __weak typeof(self) weakSelf = self;
    
    // 调用清空聊天会话的 API
    [self.viewModel resetChatSessionWithCompanionId:companionId
                                         completion:^(KBChatSessionResetResponse * _Nullable response, NSError * _Nullable error) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [KBHUD dismiss];
            
            if (error) {
                NSLog(@"[KBAIMessageChatingVC] 删除失败：%@", error.localizedDescription);
                [KBHUD showError:@"删除失败，请重试"];
                return;
            }
            
            NSLog(@"[KBAIMessageChatingVC] ✅ API 调用成功，开始清理本地数据");
            
            // 1. 删除本地列表数据
            if (indexPath.row < weakSelf.chattedList.count) {
                [weakSelf.chattedList removeObjectAtIndex:indexPath.row];
            }
            if (indexPath.row < weakSelf.dataArray.count) {
                [weakSelf.dataArray removeObjectAtIndex:indexPath.row];
            }
            
            // 2. 更新 TableView（带动画）
            [weakSelf.tableView deleteRowsAtIndexPaths:@[indexPath] 
                                      withRowAnimation:UITableViewRowAnimationLeft];
            
            // 3. ✅ 清除缓存管理器中的聊天记录（关键！）
            [[KBAIChatMessageCacheManager shared] clearMessagesForCompanionId:companionId];
            NSLog(@"[KBAIMessageChatingVC] ✅ 已清除缓存：companionId=%ld", (long)companionId);
            
            // 4. 发送通知，通知其他页面（主页）刷新
            [[NSNotificationCenter defaultCenter] postNotificationName:KBChatSessionDidResetNotification
                                                                object:nil
                                                              userInfo:@{@"companionId": @(companionId)}];
            NSLog(@"[KBAIMessageChatingVC] ✅ 已发送重置通知：companionId=%ld", (long)companionId);
            
            // 5. 显示成功提示
            [KBHUD showSuccess:@"已删除"];
        });
    }];
}

#pragma mark - 2：数据加载

- (void)loadData {
    [KBHUD show];
    __weak typeof(self) weakSelf = self;
    [self.viewModel fetchChattedCompanionsWithCompletion:^(NSArray<KBChattedCompanionModel *> * _Nullable list, NSError * _Nullable error) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [KBHUD dismiss];
            if (error) {
                [KBHUD showError:error.localizedDescription];
                return;
            }
            
            [weakSelf.chattedList removeAllObjects];
            if (list.count > 0) {
                [weakSelf.chattedList addObjectsFromArray:list];
            }
            [weakSelf.dataArray removeAllObjects];
            
            // 转换为通用数据格式
            for (KBChattedCompanionModel *model in weakSelf.chattedList) {
                NSMutableDictionary *item = [NSMutableDictionary dictionary];
                item[@"avatar"] = model.avatarUrl ?: @"";
                item[@"name"] = model.name ?: @"";
                item[@"content"] = model.shortDesc ?: @"";
                item[@"time"] = model.createdAt ?: @"";
                item[@"isPinned"] = @NO;
                item[@"companionId"] = @(model.companionId);
                [weakSelf.dataArray addObject:item];
            }
            
            [weakSelf.tableView reloadData];
        });
    }];
}

#pragma mark - Lazy Load

- (AiVM *)viewModel {
    if (!_viewModel) {
        _viewModel = [[AiVM alloc] init];
    }
    return _viewModel;
}

- (NSMutableArray<KBChattedCompanionModel *> *)chattedList {
    if (!_chattedList) {
        _chattedList = [NSMutableArray array];
    }
    return _chattedList;
}

@end