//
//  downloadThumbnailManager.m
//  隐私保护
//
//  Created by xd h on 2024/1/8.
//

#import "downloadThumbnailManager.h"

@interface downloadThumbnailManager ()
/**检测任务10s后 无反馈重新开始 */
@property (nonatomic, assign) NSInteger  taskRenewTime; //
@end

@implementation downloadThumbnailManager
static downloadThumbnailManager * cur_downloadFileShareInstance = nil;
+(downloadThumbnailManager *)shareInstance;
{
    static dispatch_once_t onceToken;
    
    dispatch_once(&onceToken, ^{
        cur_downloadFileShareInstance = [[downloadThumbnailManager alloc] init];
        
    });
    
    return cur_downloadFileShareInstance;
}

- (id)init
{
    self = [super init];
    
    if (self) {
        //[self initManager];
    }
    
    return self;
}

- (void)handlToDownloadThumbnailWith:(NSArray*)Arr
{
    _isPreViewTask = YES;
    [self handDataArrFun:Arr];
}

- (void)handDataArrFun:(NSArray*)Arr{
    if(Arr && Arr.count >0){
        NSLock *lock = [NSLock new];
        [lock lock];
        if (!_waitDownloadTaskArr) {
            _waitDownloadTaskArr = [NSMutableArray arrayWithArray:Arr];
        }
        else{
            [_waitDownloadTaskArr addObjectsFromArray:Arr];
        }
        
        [self planToDownloadThumbnailFun];
        [lock unlock];
    }
}

- (void)handlToDownloadThumbnailInDownTableViewWith:(NSArray*)Arr{
    if(_isPreViewTask){
        if (_downloadingTaskArr.count == 0 ) {
            [self handDataArrFun:Arr];
        }
        else{
            //不处理
        }
    }
    else{
        [self handDataArrFun:Arr];
    }
}

- (void)planToDownloadThumbnailFun
{
    if (!_downloadingTaskArr || _downloadingTaskArr.count == 0) {
        _downloadingTaskArr = [NSMutableArray arrayWithArray:_waitDownloadTaskArr];
        [_waitDownloadTaskArr removeAllObjects];
    }
    
    [self beginDownloadThumbnailFun];
}

- (void)beginDownloadThumbnailFun
{
    if (_downloadingTaskArr.count > 0) {
        _curDownloadFileModel = _downloadingTaskArr.firstObject;
    }
    else{
        if(_waitDownloadTaskArr && _waitDownloadTaskArr.count>0){
            _downloadingTaskArr = [NSMutableArray arrayWithArray:_waitDownloadTaskArr];
            [_waitDownloadTaskArr removeAllObjects];
            [self beginDownloadThumbnailFun];
        }
        return;
    }
    
    //检测本地是否已经下载文件了
    NSString *fileName = [self.curDownloadFileModel getFileNameFun];
    NSString*pathStr = [cachesFileManager getFilePathWithName:fileName type:DownLoadThumbnail];
    
    NSFileManager *manager0 = [NSFileManager defaultManager];
    if([manager0 fileExistsAtPath:pathStr]) {
        //已经下载过了
        [_downloadingTaskArr removeObject:_curDownloadFileModel];
        _curDownloadFileModel = nil;
        [self beginDownloadThumbnailFun];
        return;
    }
    
    self.taskRenewTime = [iTools getNowTimeStamp];
    [[NSNotificationCenter defaultCenter] postNotificationName:downloadThumbnailBeginNotification object:_curDownloadFileModel];
}

- (void)DownloadFileDoneOneFileFun
{
    [_downloadingTaskArr removeObject:_curDownloadFileModel];
    _curDownloadFileModel = nil;
    [self beginDownloadThumbnailFun];
    self.taskRenewTime = [iTools getNowTimeStamp];
    [[NSNotificationCenter defaultCenter] postNotificationName:downloadThumbnailDoneOneNotification object:nil];
}

- (void)checkReDownloadThumbnailFileFun
{
    NSInteger curTime = [iTools getNowTimeStamp];
    
    if(self.taskRenewTime == 0){
        return;
    }
    
    if(curTime - self.taskRenewTime < 10){
        return;
    }
    
    if((_downloadingTaskArr && _downloadingTaskArr.count >0)
       ||(_waitDownloadTaskArr && _waitDownloadTaskArr.count>0)){
        [self beginDownloadThumbnailFun];
    }
}
@end