﻿#pragma once

#include <wrl/client.h>
#include <ppl.h>
#include <ppltasks.h>

namespace DX
{
	inline void ThrowIfFailed(HRESULT hr)
	{
		if (FAILED(hr))
		{
			// Set a breakpoint on this line to catch Win32 API errors.
			throw Platform::Exception::CreateException(hr);
		}
	}

	// Function that reads from a binary file asynchronously.
	inline Concurrency::task<Platform::Array<byte>^> ReadDataAsync(Platform::String^ filename)
	{
		using namespace Windows::Storage;
		using namespace Concurrency;
		
		auto folder = Windows::ApplicationModel::Package::Current->InstalledLocation;
		
		return create_task(folder->GetFileAsync(filename)).then([] (StorageFile^ file) 
		{
			return FileIO::ReadBufferAsync(file);
		}).then([] (Streams::IBuffer^ fileBuffer) -> Platform::Array<byte>^ 
		{
			auto fileData = ref new Platform::Array<byte>(fileBuffer->Length);
			Streams::DataReader::FromBuffer(fileBuffer)->ReadBytes(fileData);
			return fileData;
		});
	}
}
