//
//  MedalMediaDisplayManager.m
//  YuMi
//
//  Created by AI on 2025/1/20.
//

#import "MedalMediaDisplayManager.h"
#import <QGVAPWrapView.h>
#import "XPRoomGiftAnimationParser.h"
#import "NSString+XPExtension.h"
#import "UIImageConstant.h"

@interface MedalMediaDisplayManager () <HWDMP4PlayDelegate>

@property (nonatomic, copy, readwrite, nullable) NSString *currentImagePath;
@property (nonatomic, copy, readwrite, nullable) NSString *currentMP4Path;
@property (nonatomic, strong) XPRoomGiftAnimationParser *mp4Parser;
@property (nonatomic, assign) NSInteger mp4PlaybackTag; // 播放状态标记

@end

@implementation MedalMediaDisplayManager

#pragma mark - 初始化

- (instancetype)initWithDelegate:(id<MedalMediaDisplayDelegate>)delegate {
    self = [super init];
    if (self) {
        _delegate = delegate;
        _isVisible = YES;
        _mp4PlaybackTag = 0;
        [self setupNotifications];
    }
    return self;
}

- (void)dealloc {
    [self cleanupResources];
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    NSLog(@"MedalMediaDisplayManager dealloc");
}

#pragma mark - 公共接口

- (void)updateDisplayWithModel:(id)model {
    self.currentModel = model;
    [self handleMediaDisplayWithModel:model];
}

- (void)willDisplay {
    self.isVisible = YES;
    [self resumeMP4PlaybackIfNeeded];
}

- (void)didEndDisplaying {
    self.isVisible = NO;
    [self pauseMP4Playback];
}

- (void)stopMP4Playback {
    VAPView *mp4View = [self.delegate getMP4View];
    if (mp4View) {
        [mp4View stopHWDMP4];
        self.mp4PlaybackTag = 0;
    }
}

- (void)pauseMP4Playback {
    VAPView *mp4View = [self.delegate getMP4View];
    if (mp4View && !mp4View.hidden) {
        [mp4View pauseHWDMP4];
    }
}

- (void)resumeMP4Playback {
    [self resumeMP4PlaybackIfNeeded];
}

- (void)cleanupResources {
    [self stopMP4Playback];
    self.mp4Parser = nil;
    self.currentImagePath = nil;
    self.currentMP4Path = nil;
    self.currentModel = nil;
}

#pragma mark - 核心媒体处理逻辑

- (void)handleMediaDisplayWithModel:(id)model {
    if (!model || !self.delegate) {
        [self showDefaultPlaceholder];
        return;
    }
    
    NSString *mp4Url = [self.delegate getMP4UrlFromModel:model];
    NSString *picUrl = [self.delegate getPicUrlFromModel:model];
    
    // 优先判断 MP4 URL
    if (![NSString isEmpty:mp4Url] && [self isValidMP4URL:mp4Url]) {
        [self setMp4Path:mp4Url];
        return;
    }
    
    // MP4 URL 无效，检查图片 URL
    if (![NSString isEmpty:picUrl]) {
        if ([self isValidMP4URL:picUrl]) {
            // picUrl 实际上是 MP4（兼容旧逻辑）
            [self setMp4Path:picUrl];
            return;
        } else if ([NSString isValidImageURL:picUrl]) {
            // 有效的图片 URL
            [self setImagePath:picUrl];
            return;
        }
    }
    
    // 都无效，显示默认占位图
    [self showDefaultPlaceholder];
}

- (void)setImagePath:(NSString *)imagePath {
    [self stopMP4Playback];
    
    self.currentImagePath = imagePath;
    self.currentMP4Path = nil;
    
    VAPView *mp4View = [self.delegate getMP4View];
    NetImageView *imageView = [self.delegate getImageView];
    
    mp4View.hidden = YES;
    imageView.hidden = NO;
    imageView.imageUrl = imagePath ?: @"";
    
    [self notifyDisplayUpdated:NO success:![NSString isEmpty:imagePath]];
}

- (void)setMp4Path:(NSString *)mp4Path {
    if ([NSString isEmpty:mp4Path]) {
        [self showDefaultPlaceholder];
        return;
    }
    
    [self stopMP4Playback];
    
    self.currentMP4Path = mp4Path;
    self.currentImagePath = nil;
    
    VAPView *mp4View = [self.delegate getMP4View];
    NetImageView *imageView = [self.delegate getImageView];
    
    mp4View.hidden = NO;
    imageView.hidden = YES;
    
    if (!self.mp4Parser) {
        self.mp4Parser = [[XPRoomGiftAnimationParser alloc] init];
    }
    
    @kWeakify(self);
    [self.mp4Parser parseWithURL:mp4Path
                 completionBlock:^(NSString * _Nullable videoUrl) {
        @kStrongify(self);
        if (![NSString isEmpty:videoUrl]) {
            self.mp4PlaybackTag = 1; // 标记已准备好播放
            
            if (self.isVisible) {
                [self startMP4PlaybackWithURL:videoUrl];
            }
        }
    } failureBlock:^(NSError * _Nullable error) {
        @kStrongify(self);
        NSLog(@"[MedalMediaDisplayManager] Failed to parse mp4: %@", error);
        [self handleMP4FailureWithFallback];
    }];
}

- (void)startMP4PlaybackWithURL:(NSString *)videoUrl {
    if ([NSString isEmpty:videoUrl] || !self.delegate) {
        return;
    }
    
    VAPView *mp4View = [self.delegate getMP4View];
    if (mp4View && !mp4View.hidden) {
        [mp4View playHWDMP4:videoUrl repeatCount:-1 delegate:self];
        [self notifyDisplayUpdated:YES success:YES];
        NSLog(@"[MedalMediaDisplayManager] Started MP4 playback: %@", videoUrl);
    }
}

- (void)handleMP4FailureWithFallback {
    if (!self.delegate || !self.currentModel) {
        [self showDefaultPlaceholder];
        return;
    }
    
    // MP4 失败，尝试降级到图片
    NSString *picUrl = [self.delegate getPicUrlFromModel:self.currentModel];
    if (![NSString isEmpty:picUrl] && [NSString isValidImageURL:picUrl]) {
        [self setImagePath:picUrl];
    } else {
        [self showDefaultPlaceholder];
    }
}

- (void)showDefaultPlaceholder {
    [self stopMP4Playback];
    
    VAPView *mp4View = [self.delegate getMP4View];
    NetImageView *imageView = [self.delegate getImageView];
    
    mp4View.hidden = YES;
    imageView.hidden = NO;
    imageView.imageUrl = @"";
    
    // 获取默认占位图
    UIImage *placeholderImage = nil;
    if ([self.delegate respondsToSelector:@selector(getDefaultPlaceholderImage)]) {
        placeholderImage = [self.delegate getDefaultPlaceholderImage];
    }
    if (!placeholderImage) {
        placeholderImage = [UIImageConstant defaultEmptyPlaceholder];
    }
    imageView.image = placeholderImage;
    
    [self notifyDisplayUpdated:NO success:NO];
}

- (void)resumeMP4PlaybackIfNeeded {
    if (!self.isVisible || [NSString isEmpty:self.currentMP4Path]) {
        return;
    }
    
    VAPView *mp4View = [self.delegate getMP4View];
    if (mp4View && !mp4View.hidden) {
        if (self.mp4PlaybackTag == 1) {
            // 已准备好但尚未播放，重新解析并播放
            @kWeakify(self);
            [self.mp4Parser parseWithURL:self.currentMP4Path
                         completionBlock:^(NSString * _Nullable videoUrl) {
                @kStrongify(self);
                if (![NSString isEmpty:videoUrl] && self.isVisible) {
                    [self startMP4PlaybackWithURL:videoUrl];
                }
            } failureBlock:^(NSError * _Nullable error) {
                @kStrongify(self);
                [self handleMP4FailureWithFallback];
            }];
        } else {
            // 恢复暂停的播放
            [mp4View resumeHWDMP4];
        }
    }
}

#pragma mark - 辅助方法

- (BOOL)isValidMP4URL:(NSString *)url {
    if ([NSString isEmpty:url]) {
        return NO;
    }
    
    NSString *lowercaseUrl = [url lowercaseString];
    return [lowercaseUrl hasSuffix:@".mp4"] || 
           [lowercaseUrl containsString:@"mp4"] ||
           [lowercaseUrl containsString:@"video"];
}

- (void)notifyDisplayUpdated:(BOOL)isMP4 success:(BOOL)success {
    if ([self.delegate respondsToSelector:@selector(onMediaDisplayUpdated:success:)]) {
        [self.delegate onMediaDisplayUpdated:isMP4 success:success];
    }
}

#pragma mark - 通知处理

- (void)setupNotifications {
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(handleAppDidEnterBackground)
                                                 name:UIApplicationDidEnterBackgroundNotification
                                               object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(handleAppWillEnterForeground)
                                                 name:UIApplicationWillEnterForegroundNotification
                                               object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(handleMemoryWarning)
                                                 name:UIApplicationDidReceiveMemoryWarningNotification
                                               object:nil];
}

- (void)handleAppDidEnterBackground {
    [self pauseMP4Playback];
}

- (void)handleAppWillEnterForeground {
    if (self.isVisible) {
        [self resumeMP4PlaybackIfNeeded];
    }
}

- (void)handleMemoryWarning {
    if (!self.isVisible) {
        [self stopMP4Playback];
    }
}

#pragma mark - HWDMP4PlayDelegate

- (BOOL)shouldStartPlayMP4:(VAPView *)container config:(QGVAPConfigModel *)config {
    return YES;
}

- (void)viewDidFinishPlayMP4:(NSInteger)totalFrameCount view:(VAPView *)container {
    // MP4 播放完成，循环播放会自动重新开始
}

- (void)viewDidStopPlayMP4:(NSInteger)lastFrameIndex view:(VAPView *)container {
    // MP4 播放停止
}

- (void)viewDidFailPlayMP4:(NSError *)error {
    NSLog(@"[MedalMediaDisplayManager] MP4 播放失败: %@", error);
    [self handleMP4FailureWithFallback];
}

@end