#include "RmlUi_FileInterface.h"

FileInterface_Game::FileInterface_Game()
{
	memset(m_files, 0, sizeof(m_files));
}

FileInterface_Game::~FileInterface_Game()
{
	for (size_t i = 0; i < MAX_OPEN_FILES; i++)
	{
		if (m_files[i])
			fclose(m_files[i]);
	}
}

Rml::FileHandle FileInterface_Game::Open(const Rml::String& path)
{
	// Try the path as-is first (for absolute paths)
	FILE* fp;
	if (fopen_s(&fp, path.c_str(), "rb") == 0 && fp)
	{
		for (size_t i = 0; i < MAX_OPEN_FILES; i++)
		{
			if (!m_files[i])
			{
				m_files[i] = fp;
				return static_cast<Rml::FileHandle>(i + 1);
			}
		}
		fclose(fp);
		return 0;
	}

	// If asset path is set and path is relative, try prepending it
	if (!m_asset_path.empty())
	{
		Rml::String full_path = m_asset_path + "/" + path;
		if (fopen_s(&fp, full_path.c_str(), "rb") == 0 && fp)
		{
			for (size_t i = 0; i < MAX_OPEN_FILES; i++)
			{
				if (!m_files[i])
				{
					m_files[i] = fp;
					return static_cast<Rml::FileHandle>(i + 1);
				}
			}
			fclose(fp);
			return 0;
		}
	}

	return 0;
}

void FileInterface_Game::Close(Rml::FileHandle file)
{
	size_t index = static_cast<size_t>(file) - 1;
	if (index < MAX_OPEN_FILES && m_files[index])
	{
		fclose(m_files[index]);
		m_files[index] = nullptr;
	}
}

size_t FileInterface_Game::Read(void* buffer, size_t size, Rml::FileHandle file)
{
	size_t index = static_cast<size_t>(file) - 1;
	if (index < MAX_OPEN_FILES && m_files[index])
		return fread(buffer, 1, size, m_files[index]);
	return 0;
}

bool FileInterface_Game::Seek(Rml::FileHandle file, long offset, int origin)
{
	size_t index = static_cast<size_t>(file) - 1;
	if (index < MAX_OPEN_FILES && m_files[index])
		return _fseeki64(m_files[index], offset, origin) == 0;
	return false;
}

size_t FileInterface_Game::Tell(Rml::FileHandle file)
{
	size_t index = static_cast<size_t>(file) - 1;
	if (index < MAX_OPEN_FILES && m_files[index])
		return _ftelli64(m_files[index]);
	return 0;
}