#include "common.h"

int CDropbox::HandleFileTransferError(NETLIBHTTPREQUEST *response, MCONTACT hContact)
{
	if (!response)
	{
		CDropbox::ShowNotification(TranslateT("Server does not respond"), MB_ICONERROR, hContact);
		return ACKRESULT_FAILED;
	}

	if (response->resultCode != HTTP_STATUS::OK)
	{
		CDropbox::ShowNotification(HttpStatusToText((HTTP_STATUS)response->resultCode), MB_ICONERROR, hContact);
		return response->resultCode;
	}

	return 0;
}

int CDropbox::SendFileChunkedFirst(const char *data, int length, char *uploadId, int &offset, MCONTACT hContact)
{
	HttpRequest *request = new HttpRequest(hNetlibUser, REQUEST_PUT, DROPBOX_APICONTENT_URL "/chunked_upload");
	request->AddBearerAuthHeader(db_get_sa(NULL, MODULE, "TokenSecret"));
	request->AddHeader("Content-Type", "application/octet-stream");
	request->pData = (char*)mir_alloc(sizeof(char) * length);
	memcpy(request->pData, data, length);
	request->dataLength = length;

	mir_ptr<NETLIBHTTPREQUEST> response(request->Send());

	delete request;

	if (response && response->resultCode == HTTP_STATUS::OK)
	{
		JSONNODE *root = json_parse(response->pData);
		if (root)
		{
			JSONNODE *node = json_get(root, "upload_id");
			strcpy(uploadId, mir_u2a(json_as_string(node)));

			node = json_get(root, "offset");
			offset = json_as_int(node);

			return 0;
		}

		return HandleFileTransferError(response, hContact);
	}

	return HandleFileTransferError(response, hContact);
}

int CDropbox::SendFileChunkedNext(const char *data, int length, const char *uploadId, int &offset, MCONTACT hContact)
{
	CMStringA url = DROPBOX_APICONTENT_URL "/chunked_upload";
	url.AppendFormat("?upload_id=%s&offset=%i", uploadId, offset);

	HttpRequest *request = new HttpRequest(hNetlibUser, REQUEST_PUT, url);
	request->AddBearerAuthHeader(db_get_sa(NULL, MODULE, "TokenSecret"));
	request->AddHeader("Content-Type", "application/octet-stream");
	request->pData = (char*)mir_alloc(sizeof(char) * length);
	memcpy(request->pData, data, length);
	request->dataLength = length;

	mir_ptr<NETLIBHTTPREQUEST> response(request->Send());

	delete request;

	if (response && response->resultCode == HTTP_STATUS::OK)
	{
		JSONNODE *root = json_parse(response->pData);
		if (root)
		{
			JSONNODE *node = json_get(root, "offset");
			offset = json_as_int(node);

			return 0;
		}

		return HandleFileTransferError(response, hContact);
	}

	return HandleFileTransferError(response, hContact);
}

int CDropbox::SendFileChunkedLast(const char *fileName, const char *uploadId, MCONTACT hContact)
{
	char *utf8_fileName = mir_utf8encode(fileName);

	CMStringA url;
	url.AppendFormat(
		"%s/commit_chunked_upload/%s/%s",
		DROPBOX_APICONTENT_URL,
		DROPBOX_API_ROOT,
		utf8_fileName);
	url.Replace('\\', '/');

	mir_free(utf8_fileName);

	CMStringA param = CMStringA("upload_id=") + uploadId;

	HttpRequest *request = new HttpRequest(hNetlibUser, REQUEST_POST, url);
	request->AddBearerAuthHeader(db_get_sa(NULL, MODULE, "TokenSecret"));
	request->AddHeader("Content-Type", "application/x-www-form-urlencoded");
	request->pData = mir_strdup(param);
	request->dataLength = param.GetLength();

	mir_ptr<NETLIBHTTPREQUEST> response(request->Send());

	delete request;

	if (response && response->resultCode == HTTP_STATUS::OK)
	{
		if (!strchr(fileName, '\\'))
		{
			url.Replace(DROPBOX_APICONTENT_URL, DROPBOX_API_URL);
			url.Replace("commit_chunked_upload", "shares");

			request = new HttpRequest(hNetlibUser, REQUEST_POST, url);
			request->AddBearerAuthHeader(db_get_sa(NULL, MODULE, "TokenSecret"));

			response = request->Send();

			delete request;

			if (response &&response->resultCode == HTTP_STATUS::OK)
			{
				JSONNODE *root = json_parse(response->pData);
				if (root)
				{
					JSONNODE *node = json_get(root, "url");

					char message[1024];
					mir_snprintf(
						message,
						SIZEOF(message),
						Translate("Link to download file \"%s\": %s"),
						fileName,
						mir_u2a(json_as_string(node)));

					int res = ACKRESULT_SUCCESS;

					if (hContact != CDropbox::GetDefaultContact())
						res = CallContactService(hContact, PSS_MESSAGE, 0, (LPARAM)&message);

					if (res != ACKRESULT_FAILED)
					{
						DBEVENTINFO dbei = { sizeof(dbei) };
						dbei.szModule = MODULE;
						dbei.timestamp = time(NULL);
						dbei.eventType = EVENTTYPE_MESSAGE;
						dbei.cbBlob = strlen(message);
						dbei.pBlob = (PBYTE)message;
						dbei.flags = DBEF_SENT | DBEF_UTF;
						db_event_add(hContact, &dbei);
					}

					return 0;
				}

				return HandleFileTransferError(response, hContact);
			}

			return HandleFileTransferError(response, hContact);
		}
	}

	return HandleFileTransferError(response, hContact);
}

int CDropbox::CreateFolder(const char *folderName, MCONTACT hContact)
{
	char *utf8_folderName = mir_utf8encode(folderName);

	CMStringA folder = utf8_folderName;
	folder.Replace('\\', '/');

	mir_free(utf8_folderName);

	CMStringA param;
	param.AppendFormat("root=%s&path=%s",
		DROPBOX_API_ROOT,
		folder);

	mir_ptr<HttpRequest> request(new HttpRequest(hNetlibUser, REQUEST_POST, DROPBOX_API_URL "/fileops/create_folder"));
	request->AddBearerAuthHeader(db_get_sa(NULL, MODULE, "TokenSecret"));
	request->AddHeader("Content-Type", "application/x-www-form-urlencoded");
	request->pData = mir_strdup(param);
	request->dataLength = param.GetLength();

	mir_ptr<NETLIBHTTPREQUEST> response(request->Send());

	if (response && response->resultCode == HTTP_STATUS::OK)
	{
		if (!strchr(folderName, '\\'))
		{
			CMStringA url = DROPBOX_API_URL;
			url.AppendFormat("/shares/%s/%s",
				DROPBOX_API_ROOT,
				folder);

			request = new HttpRequest(hNetlibUser, REQUEST_POST, url);
			request->AddBearerAuthHeader(db_get_sa(NULL, MODULE, "TokenSecret"));

			mir_free(response);

			response = request->Send();

			if (response && response->resultCode == HTTP_STATUS::OK)
			{
				JSONNODE *root = json_parse(response->pData);
				if (root != NULL)
				{
					JSONNODE *node = json_get(root, "url");
					char message[1024];
					mir_snprintf(
						message,
						SIZEOF(message),
						Translate("Link to download folder \"%s\": %s"),
						folderName,
						mir_u2a(json_as_string(node)));

					int res = ACKRESULT_SUCCESS;

					if (hContact != CDropbox::GetDefaultContact())
						res = CallContactService(hContact, PSS_MESSAGE, 0, (LPARAM)&message);

					if (res != ACKRESULT_FAILED)
					{
						DBEVENTINFO dbei = { sizeof(dbei) };
						dbei.szModule = MODULE;
						dbei.timestamp = time(NULL);
						dbei.eventType = EVENTTYPE_MESSAGE;
						dbei.cbBlob = strlen(message);
						dbei.pBlob = (PBYTE)message;
						dbei.flags = DBEF_SENT | DBEF_UTF;
						db_event_add(hContact, &dbei);
					}

					return 0;
				}

				return HandleFileTransferError(response, hContact);
			}

			return HandleFileTransferError(response, hContact);
		}
	}

	return HandleFileTransferError(response, hContact);
}

void _cdecl CDropbox::SendFileAsync(void *arg)
{
	bool error = false;
	FileTransfer *ftp = (FileTransfer*)arg;

	ProtoBroadcastAck(MODULE, ftp->pfts.hContact, ACKTYPE_FILE, ACKRESULT_INITIALISING, ftp->hProcess, 0);

	for (int i = 0; ftp->pszFolders[i]; i++)
	{
		if (INSTANCE->CreateFolder(ftp->pszFolders[i], ftp->hContact))
		{
			error = true;
			break;
		}
	}

	if (!error)
	{
		for (int i = 0; ftp->pfts.pszFiles[i]; i++)
		{
			FILE *file = fopen(ftp->pfts.pszFiles[i], "rb");
			if (file != NULL)
			{
				int offset = 0;
				char *uploadId = new char[32];

				const char *fileName = NULL;
				if (!ftp->relativePathStart)
					fileName = strrchr(ftp->pfts.pszFiles[i], '\\') + 1;
				else
					fileName = &ftp->pfts.pszFiles[i][ftp->relativePathStart];

				fseek(file, 0, SEEK_END);
				DWORD fileSize = ftell(file);
				fseek(file, 0, SEEK_SET);

				ftp->pfts.currentFileNumber = i;
				ftp->pfts.currentFileSize = fileSize;
				ftp->pfts.currentFileProgress = 0;
				ftp->pfts.szCurrentFile = strrchr(ftp->pfts.pszFiles[i], '\\') + 1;

				ProtoBroadcastAck(MODULE, ftp->pfts.hContact, ACKTYPE_FILE, ACKRESULT_DATA, ftp->hProcess, (LPARAM)&ftp->pfts);

				while (!feof(file) && !ferror(file))
				{
					int chunkSize = DROPBOX_FILE_CHUNK_SIZE;
					if (fileSize < 1024*1024)
						chunkSize = DROPBOX_FILE_CHUNK_SIZE / 5;
					else if (fileSize > 20*1024*1024)
						chunkSize = DROPBOX_FILE_CHUNK_SIZE * 4;

					char *data = new char[chunkSize + 1];
					int count = (int)fread(data, sizeof(char), chunkSize, file);

					if (!offset)
					{
						if (INSTANCE->SendFileChunkedFirst(data, count, uploadId, offset, ftp->hContact))
						{
							error = true;
							break;
						}
					}
					else
					{
						if (INSTANCE->SendFileChunkedNext(data, count, uploadId, offset, ftp->hContact))
						{
							error = true;
							break;
						}
					}

					ftp->pfts.currentFileProgress += count;
					ftp->pfts.totalProgress += count;

					ProtoBroadcastAck(MODULE, ftp->pfts.hContact, ACKTYPE_FILE, ACKRESULT_DATA, ftp->hProcess, (LPARAM)&ftp->pfts);
				}

				fclose(file);

				if (!error)
				{
					if (INSTANCE->SendFileChunkedLast(fileName, uploadId, ftp->hContact))
					{
						error = true;
					}
					else
					{
						ftp->pfts.currentFileProgress = ftp->pfts.currentFileSize;

						if (i < ftp->pfts.totalFiles - 1)
							ProtoBroadcastAck(MODULE, ftp->pfts.hContact, ACKTYPE_FILE, ACKRESULT_NEXTFILE, ftp->hProcess, 0);
					}
				}
			}
		}
	}

	if (INSTANCE->hContactTransfer)
		INSTANCE->hContactTransfer = 0;

	if (!error)
		ProtoBroadcastAck(MODULE, ftp->pfts.hContact, ACKTYPE_FILE, ACKRESULT_SUCCESS, ftp->hProcess, 0);
	else
		ProtoBroadcastAck(MODULE, ftp->pfts.hContact, ACKTYPE_FILE, ACKRESULT_FAILED, ftp->hProcess, 0);

	delete ftp;
}