//
//  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"

// 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) UICollectionView *collectionView;
@property (nonatomic, strong) NSMutableArray<UIImage *> *images;
@property (nonatomic, strong) NSMutableArray *selectedAssets; // TZImagePicker 已选资源

@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];
}

- (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.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);
    }];
    [self.collectionView 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(110);
    }];
    
    // 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)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) {
        // TODO: 显示错误提示 "请输入内容或选择图片"
        NSLog(@"请输入内容或选择图片");
        return;
    }
    
    // 创建 Swift API Helper
    EPMomentAPISwiftHelper *apiHelper = [[EPMomentAPISwiftHelper alloc] init];
    
    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:^{
                    // 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:^{
            // 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);
        }];
    }
}

#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:@"mine_user_info_album_add"]];
        [cell.contentView addSubview:iv];
        [iv mas_makeConstraints:^(MASConstraintMaker *make) { make.center.equalTo(cell.contentView); make.size.mas_equalTo(CGSizeMake(24, 24)); }];
    } 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]; [_backButton setImage:[UIImage imageNamed:@"common_nav_back"] forState:UIControlStateNormal]; [_backButton addTarget:self action:@selector(onBack) forControlEvents:UIControlEventTouchUpInside]; } return _backButton; }
- (UILabel *)titleLabel { if (!_titleLabel) { _titleLabel = [UILabel new]; _titleLabel.text = @"图文发布"; _titleLabel.textColor = [DJDKMIMOMColor mainTextColor]; _titleLabel.font = [UIFont systemFontOfSize:17]; } return _titleLabel; }
- (UIButton *)publishButton { 
    if (!_publishButton) { 
        _publishButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
        [_publishButton setTitle:@"发布" forState:UIControlStateNormal]; 
        [_publishButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
        _publishButton.titleLabel.font = [UIFont systemFontOfSize:17 weight:UIFontWeightMedium];
        _publishButton.layer.cornerRadius = 25;
        _publishButton.layer.masksToBounds = YES;
        // 渐变背景：从浅紫到深紫
        CAGradientLayer *gradient = [CAGradientLayer layer];
        gradient.colors = @[(__bridge id)[UIColor colorWithRed:0.6 green:0.3 blue:0.8 alpha:1.0].CGColor,
                           (__bridge id)[UIColor colorWithRed:0.3 green:0.1 blue:0.5 alpha:1.0].CGColor];
        gradient.startPoint = CGPointMake(0, 0);
        gradient.endPoint = CGPointMake(1, 0);
        gradient.frame = CGRectMake(0, 0, 1, 1);
        [_publishButton.layer insertSublayer:gradient atIndex:0];
        [_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 = [DJDKMIMOMColor mainTextColor]; _textView.placeholderTextColor = [DJDKMIMOMColor secondTextColor]; _textView.font = [UIFont systemFontOfSize:15]; _textView.delegate = self; } return _textView; }
- (UILabel *)limitLabel { if (!_limitLabel) { _limitLabel = [UILabel new]; _limitLabel.text = @"0/500"; _limitLabel.textColor = [DJDKMIMOMColor mainTextColor]; _limitLabel.font = [UIFont systemFontOfSize:12]; } return _limitLabel; }
- (UIView *)lineView { if (!_lineView) { _lineView = [UIView new]; _lineView.backgroundColor = [DJDKMIMOMColor dividerColor]; } return _lineView; }
- (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