//
//  EPMomentPublishViewController.m
//  YuMi
//
//  Created by AI on 2025-10-10.
//

// NOTE: 话题选择功能未实现
// 旧版本 XPMonentsPublishViewController 包含话题选择 UI (addTopicView)
// 但实际业务中话题功能使用率低，新版本暂不实现
// 如需实现参考: YuMi/Modules/YMMonents/View/XPMonentsPublishTopicView

#import "EPMomentPublishViewController.h"
#import <Masonry/Masonry.h>
#import <TZImagePickerController/TZImagePickerController.h>
#import "DJDKMIMOMColor.h"
#import "SZTextView.h"
#import "YuMi-Swift.h"
#import "EPEmotionColorPicker.h"
#import "EPEmotionColorStorage.h"
#import "UIView+GradientLayer.h"

// 发布成功通知
NSString *const EPMomentPublishSuccessNotification = @"EPMomentPublishSuccessNotification";

@interface EPMomentPublishViewController () <UICollectionViewDataSource, UICollectionViewDelegate, TZImagePickerControllerDelegate, UITextViewDelegate>

@property (nonatomic, strong) UIView *navView;
@property (nonatomic, strong) UIButton *backButton;
@property (nonatomic, strong) UILabel *titleLabel;
@property (nonatomic, strong) UIButton *publishButton;

@property (nonatomic, strong) UIView *contentView;
@property (nonatomic, strong) SZTextView *textView;
@property (nonatomic, strong) UILabel *limitLabel;
@property (nonatomic, strong) UIView *lineView;
@property (nonatomic, strong) UIButton *emotionButton;
@property (nonatomic, strong) UICollectionView *collectionView;
@property (nonatomic, strong) NSMutableArray<UIImage *> *images;
@property (nonatomic, strong) NSMutableArray *selectedAssets; // TZImagePicker 已选资源
@property (nonatomic, copy) NSString *selectedEmotionColor; // 选中的情绪颜色

@property (nonatomic, assign) BOOL hasAddedGradient; // 标记是否已添加渐变背景

@end

@implementation EPMomentPublishViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor colorWithRed:0x0C/255.0 green:0x05/255.0 blue:0x27/255.0 alpha:1.0];
    [self setupUI];
    
    // 自动加载用户专属颜色
    [self loadUserSignatureColor];
}

- (void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];
    
    // 添加渐变背景到发布按钮（只添加一次）
    if (!self.hasAddedGradient && self.publishButton.bounds.size.width > 0) {
        // 使用与登录页面相同的渐变颜色（EPLoginConfig.Colors）
        // gradientStart: #F854FC, gradientEnd: #500FFF
        [self.publishButton addGradientBackgroundWithColors:@[
            [UIColor colorWithRed:0xF8/255.0 green:0x54/255.0 blue:0xFC/255.0 alpha:1.0], // #F854FC
            [UIColor colorWithRed:0x50/255.0 green:0x0F/255.0 blue:0xFF/255.0 alpha:1.0]  // #500FFF
        ] startPoint:CGPointMake(0, 0.5) endPoint:CGPointMake(1, 0.5) cornerRadius:25];
        
        self.hasAddedGradient = YES;
    }
}

/// 加载用户专属颜色作为默认选中
- (void)loadUserSignatureColor {
    NSString *signatureColor = [EPEmotionColorStorage userSignatureColor];
    if (signatureColor) {
        self.selectedEmotionColor = signatureColor;
        [self updateEmotionButtonAppearance];
        NSLog(@"[Publish] 自动选中专属颜色: %@", signatureColor);
    }
}

- (void)setupUI {
    [self.view addSubview:self.navView];
    [self.view addSubview:self.contentView];
    [self.navView addSubview:self.backButton];
    [self.navView addSubview:self.titleLabel];
    // 发布按钮移到底部
    [self.contentView addSubview:self.textView];
    [self.contentView addSubview:self.limitLabel];
    [self.contentView addSubview:self.lineView];
    [self.contentView addSubview:self.emotionButton];
    [self.contentView addSubview:self.collectionView];
    [self.contentView addSubview:self.publishButton];

    [self.navView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.leading.trailing.top.equalTo(self.view);
        make.height.mas_equalTo(kNavigationHeight);
    }];
    [self.backButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.leading.equalTo(self.view).offset(10);
        make.top.mas_equalTo(statusbarHeight);
        make.size.mas_equalTo(CGSizeMake(44, 44));
    }];
    [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerX.equalTo(self.navView);
        make.centerY.equalTo(self.backButton);
    }];
    // 发布按钮约束移到底部
    [self.contentView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.leading.trailing.equalTo(self.view);
        make.top.equalTo(self.navView.mas_bottom);
        make.bottom.equalTo(self.view);
    }];
    [self.textView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.leading.trailing.equalTo(self.contentView).inset(15);
        make.top.equalTo(self.contentView).offset(10);
        make.height.mas_equalTo(150);
    }];
    [self.limitLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.textView.mas_bottom).offset(5);
        make.trailing.equalTo(self.textView);
    }];
    [self.lineView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.limitLabel.mas_bottom).offset(10);
        make.leading.trailing.equalTo(self.textView);
        make.height.mas_equalTo(1);
    }];
    
    // 情绪按钮
    [self.emotionButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.leading.trailing.equalTo(self.contentView).inset(15);
        make.top.equalTo(self.lineView.mas_bottom).offset(10);
        make.height.mas_equalTo(44);
    }];
    
    // 计算显示3行图片所需的高度
    // itemW = (屏幕宽度 - 左右边距30 - 列间距20) / 3
    // 总高度 = 3行itemW + 2个行间距(10*2)
    CGFloat itemW = (KScreenWidth - 15*2 - 10*2)/3.0;
    CGFloat collectionHeight = itemW * 3 + 10 * 2;
    
    [self.collectionView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.leading.trailing.equalTo(self.contentView).inset(15);
        make.top.equalTo(self.emotionButton.mas_bottom).offset(10);
        make.height.mas_equalTo(collectionHeight);
    }];
    
    // 底部发布按钮
    [self.publishButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.leading.trailing.equalTo(self.view).inset(20);
        make.bottom.equalTo(self.view.mas_safeAreaLayoutGuideBottom).offset(-20);
        make.height.mas_equalTo(50);
    }];
}

#pragma mark - Actions

- (void)onBack {
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (void)onEmotionButtonTapped {
    EPEmotionColorPicker *picker = [[EPEmotionColorPicker alloc] init];
    
    // 预选中当前颜色（如果有）
    picker.preselectedColor = self.selectedEmotionColor;
    
    __weak typeof(self) weakSelf = self;
    picker.onColorSelected = ^(NSString *hexColor) {
        __strong typeof(weakSelf) self = weakSelf;
        self.selectedEmotionColor = hexColor;
        [self updateEmotionButtonAppearance];
    };
    [picker showInView:self.view];
}

- (void)updateEmotionButtonAppearance {
    if (self.selectedEmotionColor) {
        // 显示选中的颜色
        UIColor *color = [self colorFromHex:self.selectedEmotionColor];
        
        // 创建色块视图
        UIView *colorDot = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
        colorDot.backgroundColor = color;
        colorDot.layer.cornerRadius = 10;
        colorDot.layer.masksToBounds = YES;
        colorDot.layer.borderWidth = 2;
        colorDot.layer.borderColor = [UIColor whiteColor].CGColor;
        
        // 转换为 UIImage
        UIGraphicsBeginImageContextWithOptions(colorDot.bounds.size, NO, 0);
        [colorDot.layer renderInContext:UIGraphicsGetCurrentContext()];
        UIImage *colorDotImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        
        [self.emotionButton setImage:colorDotImage forState:UIControlStateNormal];
        
        // 获取情绪名称
        NSString *emotionName = [EPEmotionColorStorage emotionNameForColor:self.selectedEmotionColor];
        NSString *title = emotionName 
            ? [NSString stringWithFormat:@"  Selected Emotion: %@", emotionName]
            : @"  Emotion Selected";
        [self.emotionButton setTitle:title forState:UIControlStateNormal];
    } else {
        [self.emotionButton setImage:nil forState:UIControlStateNormal];
        [self.emotionButton setTitle:@"🎨  Add Emotion" forState:UIControlStateNormal];
    }
}

- (UIColor *)colorFromHex:(NSString *)hexString {
    unsigned rgbValue = 0;
    NSScanner *scanner = [NSScanner scannerWithString:hexString];
    [scanner setScanLocation:1]; // 跳过 #
    [scanner scanHexInt:&rgbValue];
    return [UIColor colorWithRed:((rgbValue & 0xFF0000) >> 16)/255.0
                           green:((rgbValue & 0xFF00) >> 8)/255.0
                            blue:(rgbValue & 0xFF)/255.0
                           alpha:1.0];
}

- (void)onPublish {
    [self.view endEditing:YES];
    
    // 验证：文本或图片至少有一项
    if (self.textView.text.length == 0 && self.images.count == 0) {
        [EPProgressHUD showError:YMLocalizedString(@"publish.content_or_image_required")];
        return;
    }
    
    // 创建 Swift API Helper
    EPMomentAPISwiftHelper *apiHelper = [[EPMomentAPISwiftHelper alloc] init];
    
    // 保存情绪颜色用于发布后关联
    NSString *emotionColorToSave = self.selectedEmotionColor;
    
    if (self.images.count > 0) {
        // 有图片：上传后发布（统一入口）
        [[EPSDKManager shared] uploadImages:self.images 
            progress:^(NSInteger uploaded, NSInteger total) {
                [EPProgressHUD showProgress:uploaded total:total];
            } 
            success:^(NSArray<NSDictionary *> *resList) {
                [EPProgressHUD dismiss];
                [apiHelper publishMomentWithType:@"2" 
                                         content:self.textView.text ?: @"" 
                                         resList:resList 
                                      completion:^{
                    // 保存临时情绪颜色（等待列表刷新后匹配）
                    if (emotionColorToSave) {
                        [self savePendingEmotionColor:emotionColorToSave];
                    }
                    // 发送发布成功通知
                    [[NSNotificationCenter defaultCenter] postNotificationName:EPMomentPublishSuccessNotification object:nil];
                    [self dismissViewControllerAnimated:YES completion:nil];
                } failure:^(NSInteger code, NSString *msg) {
                    // TODO: 显示错误 Toast
                    NSLog(@"发布失败: %ld - %@", (long)code, msg);
                }];
            } 
            failure:^(NSString *errorMsg) {
                [EPProgressHUD dismiss];
                // TODO: 显示错误 Toast
                NSLog(@"上传失败: %@", errorMsg);
            }];
    } else {
        // 纯文本：直接发布
        [apiHelper publishMomentWithType:@"0" 
                                 content:self.textView.text 
                                 resList:@[] 
                              completion:^{
            // 保存临时情绪颜色（等待列表刷新后匹配）
            if (emotionColorToSave) {
                [self savePendingEmotionColor:emotionColorToSave];
            }
            // 发送发布成功通知
            [[NSNotificationCenter defaultCenter] postNotificationName:EPMomentPublishSuccessNotification object:nil];
            [self dismissViewControllerAnimated:YES completion:nil];
        } failure:^(NSInteger code, NSString *msg) {
            // TODO: 显示错误 Toast
            NSLog(@"发布失败: %ld - %@", (long)code, msg);
        }];
    }
}

/// 保存待处理的情绪颜色（临时存储，供列表刷新后匹配）
- (void)savePendingEmotionColor:(NSString *)color {
    [[NSUserDefaults standardUserDefaults] setObject:color forKey:@"EP_Pending_Emotion_Color"];
    [[NSUserDefaults standardUserDefaults] setObject:@([[NSDate date] timeIntervalSince1970]) forKey:@"EP_Pending_Emotion_Timestamp"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

#pragma mark - UICollectionView

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    return self.images.count + 1; // 最后一个是添加按钮
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"ep.publish.cell" forIndexPath:indexPath];
    cell.contentView.backgroundColor = [[UIColor whiteColor] colorWithAlphaComponent:0.06];
    cell.contentView.layer.cornerRadius = 12;
    // 清空复用子视图，避免加号被覆盖
    for (UIView *sub in cell.contentView.subviews) { [sub removeFromSuperview]; }
    BOOL showAdd = (self.images.count < 9) && (indexPath.item == self.images.count);
    if (showAdd) {
        UIImageView *iv = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"icon_moment_addphoto"]];
        iv.contentMode = UIViewContentModeScaleAspectFill;
        iv.clipsToBounds = YES;
        [cell.contentView addSubview:iv];
        [iv mas_makeConstraints:^(MASConstraintMaker *make) { make.edges.equalTo(cell.contentView); }];
    } else {
        UIImageView *iv = [[UIImageView alloc] init];
        iv.contentMode = UIViewContentModeScaleAspectFill;
        iv.layer.masksToBounds = YES;
        [cell.contentView addSubview:iv];
        [iv mas_makeConstraints:^(MASConstraintMaker *make) { make.edges.equalTo(cell.contentView); }];
        NSInteger idx = MIN(indexPath.item, (NSInteger)self.images.count - 1);
        if (idx >= 0 && idx < self.images.count) iv.image = self.images[idx];
    }
    return cell;
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.item == self.images.count) {
        TZImagePickerController *picker = [[TZImagePickerController alloc] initWithMaxImagesCount:9 delegate:self];
        picker.allowPickingVideo = NO;
        picker.allowTakeVideo = NO;
        picker.selectedAssets = self.selectedAssets; // 预选
        picker.maxImagesCount = 9; // 总上限
        [self presentViewController:picker animated:YES completion:nil];
    }
}

#pragma mark - TZImagePickerControllerDelegate
- (void)imagePickerController:(TZImagePickerController *)picker didFinishPickingPhotos:(NSArray<UIImage *> *)photos sourceAssets:(NSArray *)assets isSelectOriginalPhoto:(BOOL)isSelectOriginalPhoto infos:(NSArray<NSDictionary *> *)infos {
    // 合并选择：在已有基础上追加，最多 9 张
    for (NSInteger i = 0; i < assets.count; i++) {
        id asset = assets[i];
        UIImage *img = [photos xpSafeObjectAtIndex:i] ?: photos[i];
        if (![self.selectedAssets containsObject:asset] && self.images.count < 9) {
            [self.selectedAssets addObject:asset];
            [self.images addObject:img];
        }
    }
    [self.collectionView reloadData];
}

#pragma mark - UITextViewDelegate
- (void)textViewDidChange:(UITextView *)textView {
    if (textView.text.length > 500) {
        textView.text = [textView.text substringToIndex:500];
    }
    self.limitLabel.text = [NSString stringWithFormat:@"%lu/500", (unsigned long)textView.text.length];
}

#pragma mark - Lazy

- (UIView *)navView { if (!_navView) { _navView = [UIView new]; _navView.backgroundColor = [UIColor clearColor]; } return _navView; }
- (UIButton *)backButton { 
    if (!_backButton) { 
        _backButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
        // 使用系统返回图标
        UIImage *backImage = [UIImage systemImageNamed:@"chevron.left"];
        UIImageSymbolConfiguration *config = [UIImageSymbolConfiguration configurationWithPointSize:20 weight:UIImageSymbolWeightMedium];
        backImage = [backImage imageByApplyingSymbolConfiguration:config];
        [_backButton setImage:backImage forState:UIControlStateNormal];
        [_backButton setTintColor:[UIColor whiteColor]]; // 白色适配深色背景
        [_backButton addTarget:self action:@selector(onBack) forControlEvents:UIControlEventTouchUpInside]; 
    } 
    return _backButton; 
}
- (UILabel *)titleLabel { 
    if (!_titleLabel) { 
        _titleLabel = [UILabel new]; 
        _titleLabel.text = YMLocalizedString(@"publish.title"); 
        _titleLabel.textColor = [UIColor whiteColor]; // 白色适配深色背景
        _titleLabel.font = [UIFont systemFontOfSize:17]; 
    } 
    return _titleLabel; 
}
- (UIButton *)publishButton { 
    if (!_publishButton) { 
        _publishButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
        [_publishButton setTitle:YMLocalizedString(@"common.publish") forState:UIControlStateNormal]; 
        [_publishButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
        _publishButton.titleLabel.font = [UIFont systemFontOfSize:17 weight:UIFontWeightMedium];
        _publishButton.layer.cornerRadius = 25;
        _publishButton.layer.masksToBounds = NO; // 改为 NO 以便渐变层正常显示
        // 渐变背景将在 viewDidLayoutSubviews 中添加（与登录页面统一）
        [_publishButton addTarget:self action:@selector(onPublish) forControlEvents:UIControlEventTouchUpInside]; 
    } 
    return _publishButton; 
}
- (UIView *)contentView { if (!_contentView) { _contentView = [UIView new]; _contentView.backgroundColor = [UIColor clearColor]; } return _contentView; }
- (SZTextView *)textView { 
    if (!_textView) { 
        _textView = [SZTextView new]; 
        _textView.placeholder = @"Enter Content"; 
        _textView.textColor = [UIColor whiteColor]; // 白色文本适配深色背景
        _textView.placeholderTextColor = [[UIColor whiteColor] colorWithAlphaComponent:0.4]; // 半透明白色占位符
        _textView.backgroundColor = [[UIColor whiteColor] colorWithAlphaComponent:0.08]; // 轻微背景色
        _textView.layer.cornerRadius = 12;
        _textView.layer.masksToBounds = YES;
        _textView.font = [UIFont systemFontOfSize:15]; 
        _textView.delegate = self; 
    } 
    return _textView; 
}
- (UILabel *)limitLabel { 
    if (!_limitLabel) { 
        _limitLabel = [UILabel new]; 
        _limitLabel.text = @"0/500"; 
        _limitLabel.textColor = [[UIColor whiteColor] colorWithAlphaComponent:0.6]; // 浅色适配深色背景
        _limitLabel.font = [UIFont systemFontOfSize:12]; 
    } 
    return _limitLabel; 
}
- (UIView *)lineView { if (!_lineView) { _lineView = [UIView new]; _lineView.backgroundColor = [DJDKMIMOMColor dividerColor]; } return _lineView; }
- (UIButton *)emotionButton { 
    if (!_emotionButton) { 
        _emotionButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
        [_emotionButton setTitle:@"🎨  Add Emotion" forState:UIControlStateNormal]; 
        [_emotionButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; // 白色文本
        _emotionButton.titleLabel.font = [UIFont systemFontOfSize:15];
        _emotionButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
        _emotionButton.contentEdgeInsets = UIEdgeInsetsMake(0, 15, 0, 0);
        _emotionButton.backgroundColor = [[UIColor whiteColor] colorWithAlphaComponent:0.08]; // 稍微提亮背景
        _emotionButton.layer.cornerRadius = 8;
        _emotionButton.layer.masksToBounds = YES;
        [_emotionButton addTarget:self action:@selector(onEmotionButtonTapped) forControlEvents:UIControlEventTouchUpInside]; 
    } 
    return _emotionButton; 
}
- (UICollectionView *)collectionView { if (!_collectionView) { UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init]; layout.minimumLineSpacing = 10; layout.minimumInteritemSpacing = 10; CGFloat itemW = (KScreenWidth - 15*2 - 10*2)/3.0; layout.itemSize = CGSizeMake(itemW, itemW); _collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:layout]; _collectionView.delegate = self; _collectionView.dataSource = self; _collectionView.backgroundColor = [UIColor clearColor]; [_collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"ep.publish.cell"]; } return _collectionView; }
- (NSMutableArray<UIImage *> *)images { if (!_images) { _images = [NSMutableArray array]; } return _images; }
- (NSMutableArray *)selectedAssets { if (!_selectedAssets) { _selectedAssets = [NSMutableArray array]; } return _selectedAssets; }

@end