//
//  customUploadOperation.m
//  Private-X
//
//  Created by xd h on 2024/8/27.
//

#import "customUploadOperation.h"

//#define Kboundary2 @"Boundaryhxd"
//#define KNewLine2 [@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]

@implementation customUploadOperation

#pragma mark 分段读视频文件
-(NSData*)cutVideoFileFunAtIndex:(NSUInteger)dataIndex withMaxLenght:(NSInteger)maxLengt{
    HLog(@"视频切片开始 线程：%@",[NSThread currentThread]);
    uploadFileDataModel *dataModel = _fileModel;
    NSString *filePath =  _filePath;
    if(!filePath || filePath.length == 0){
        filePath = [cachesFileManager getFilePathWithName:dataModel.filename type:uploadFileTypeVideo]; // 文件路径
    }

    NSFileManager *manager0 =  [NSFileManager defaultManager];;
    
    if(![manager0 fileExistsAtPath:filePath]) {
        return [NSData new];
    }
    
    NSFileHandle *fileHandle = _fileHandle;
    if(!fileHandle){
        fileHandle = [NSFileHandle fileHandleForReadingAtPath:filePath]; // 创建文件句柄
        _fileHandle = fileHandle;
    }
    
      
    // 设置分段读取的大小，这里以每次读取1KB为例
    const NSUInteger chunkSize = maxLengt;//cutVideoPieceSzie;//5 * 1024 *1024;
    NSMutableData *data = [NSMutableData data];
    
    if (fileHandle) {
       
        long long endOfFile = [fileHandle seekToEndOfFile];
        
        if(dataModel.totalBytes == 0
           || dataModel.totalBytes < endOfFile){//异常处理
            dataModel.totalBytes = endOfFile;
        }
        
        //异常处理
        if(endOfFile == dataIndex){
            dataModel.totalBytes = endOfFile;
            dataModel.didUploadBytes = endOfFile;
            dataModel.curUploadStateType = uploadStateDone;
            [fileHandle closeFile];
            _fileHandle = nil;
            return  data;
        }
        
        if (endOfFile >=  chunkSize) {
            
            // 读取文件的分段数据到某个位置
            [fileHandle seekToFileOffset:dataIndex];
            
            // 读取文件的分段数据
            NSData* chunk = [fileHandle readDataOfLength:chunkSize];
            if (chunk) {
                [data appendData:chunk];
            }
        }
        else{
            // 读取文件的分段数据到某个位置
            [fileHandle seekToFileOffset:dataIndex];
            
            [data appendData:[fileHandle readDataToEndOfFile]];
            // 关闭文件句柄
            [fileHandle closeFile];
            _fileHandle = nil;
        }
    }
    
    HLog(@"视频切片完成 dataIndex:%ld --长度:%ld",dataIndex,[data length])
    return data;
}

- (void)closeFileHandleFun
{
    if(_fileHandle){
        [_fileHandle closeFile];
        _fileHandle = nil;
    }
}
@end