/*
The MIT License (MIT)

Copyright (c) 2015 Johannes Lumpe

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

Modified by Sergei Kazakov on 31.10.24.
*/

#import "RNFSTurboUploader.h"

@implementation RNFSTurboUploadParams

@end

@interface RNFSTurboUploader()

@property (copy) RNFSTurboUploadParams* params;

@property (retain) NSURLSessionDataTask* task;

@end

@implementation RNFSTurboUploader

- (void)uploadFiles:(RNFSTurboUploadParams*)params
{
  _params = params;

  NSString *method = _params.method;
  NSURL *url = [NSURL URLWithString:_params.toUrl];
  NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url];
  [req setHTTPMethod:method];
  BOOL binaryStreamOnly = _params.binaryStreamOnly;

  // set headers
  NSString *formBoundaryString = [self generateBoundaryString];
  NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", formBoundaryString];
  [req setValue:contentType forHTTPHeaderField:@"Content-Type"];
  for (NSString *key in _params.headers) {
    id val = [_params.headers objectForKey:key];
    if ([val respondsToSelector:@selector(stringValue)]) {
      val = [val stringValue];
    }
    if (![val isKindOfClass:[NSString class]]) {
      continue;
    }
    [req setValue:val forHTTPHeaderField:key];
  }

  NSData *formBoundaryData = [[NSString stringWithFormat:@"--%@\r\n", formBoundaryString] dataUsingEncoding:NSUTF8StringEncoding];
  NSMutableData* reqBody = [NSMutableData data];

  // add fields
  for (NSString *key in _params.fields) {
    id val = [_params.fields objectForKey:key];
    if ([val respondsToSelector:@selector(stringValue)]) {
      val = [val stringValue];
    }
    if (![val isKindOfClass:[NSString class]]) {
      continue;
    }

    [reqBody appendData:formBoundaryData];
    [reqBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", key] dataUsingEncoding:NSUTF8StringEncoding]];
    [reqBody appendData:[val dataUsingEncoding:NSUTF8StringEncoding]];
    [reqBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
  }
  NSArray *files = _params.files;
  // add files
  for (NSDictionary *file in files) {
    NSString *name = file[@"name"];
    NSString *filename = file[@"filename"];
    NSString *filepath = file[@"filepath"];
    NSString *filetype = file[@"filetype"];

    // Check if file exists
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:filepath]){
      // NSError* error = [NSError errorWithDomain:@"Uploader" code:NSURLErrorFileDoesNotExist userInfo:@{NSLocalizedDescriptionKey: [NSString stringWithFormat: @"Failed to open target file at path: %@", filepath]}];
      // return _params.errorCallback(error);
      NSLog(@"Failed to open target file at path: %@", filepath);
      continue;
    }

    NSData *fileData = [NSData dataWithContentsOfFile:filepath];
    if (!binaryStreamOnly) {
      [reqBody appendData:formBoundaryData];
      [reqBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", name.length ? name : filename, filename] dataUsingEncoding:NSUTF8StringEncoding]];

      if (filetype) {
        [reqBody appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n", filetype] dataUsingEncoding:NSUTF8StringEncoding]];
      } else {
        [reqBody appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n", [self mimeTypeForPath:filename]] dataUsingEncoding:NSUTF8StringEncoding]];
      }
      [reqBody appendData:[[NSString stringWithFormat:@"Content-Length: %ld\r\n\r\n", (long)[fileData length]] dataUsingEncoding:NSUTF8StringEncoding]];
    }

    [reqBody appendData:fileData];
    if (!binaryStreamOnly) {
      [reqBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    }
  }

  if (!binaryStreamOnly) {
    // add end boundary
    NSData* end = [[NSString stringWithFormat:@"--%@--\r\n", formBoundaryString] dataUsingEncoding:NSUTF8StringEncoding];
    [reqBody appendData:end];
  }

  // send request
  [req setHTTPBody:reqBody];

  NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
  NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration delegate:(id)self delegateQueue:[NSOperationQueue mainQueue]];
  _task = [session dataTaskWithRequest:req completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
      NSString * str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
      return self->_params.completeCallback(str, response);
  }];
  [_task resume];
  [session finishTasksAndInvalidate];
  if (_params.beginCallback) {
    _params.beginCallback();
  }
}

- (NSString *)generateBoundaryString
{
  NSString *uuid = [[NSUUID UUID] UUIDString];
  return [NSString stringWithFormat:@"----%@", uuid];
}

- (NSString *)mimeTypeForPath:(NSString *)filepath
{
  NSString *fileExtension = [filepath pathExtension];
  NSString *UTI = (__bridge_transfer NSString *)UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)fileExtension, NULL);
  NSString *contentType = (__bridge_transfer NSString *)UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)UTI, kUTTagClassMIMEType);

  if (contentType) {
    return contentType;
  }
  return @"application/octet-stream";
}

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
  if(error != nil) {
    return _params.errorCallback(error);
  }
}

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesSent totalBytesExpectedToSend:(NSInteger)totalBytesExpectedToSend
{
  if (_params.progressCallback) {
    _params.progressCallback([NSNumber numberWithLongLong:totalBytesExpectedToSend], [NSNumber numberWithLongLong:totalBytesSent]);
  }
}

- (void)stopUpload
{
  [_task cancel];
}

@end