#include "Plugin.h"
#include <stdexcept>

namespace LifeGraphics
{
	Plugin::Plugin(const std::string& fileName)
	{
		g_hDLL = ::LoadLibraryA(fileName.c_str());
		if(!g_hDLL)
			throw std::runtime_error("Could not load library");

		try
		{
			g_pfnGetPluginVersion = reinterpret_cast<fn_getPluginVersion>(::GetProcAddress(g_hDLL, "getPluginVersion"));
			g_pfnGetEngineVersion = reinterpret_cast<fn_getEngineVersion>(::GetProcAddress(g_hDLL, "getEngineVersion"));
			g_pfnRegisterPlugin = reinterpret_cast<fn_registerPlugin>(::GetProcAddress(g_hDLL, "registerPlugin"));
			//g_pfnGetPluginName = reinterpret_cast<fn_getPluginName>(::GetProcAddress(g_hDLL, "getPluginName"));

			if(!g_pfnGetPluginVersion || !g_pfnGetEngineVersion || !g_pfnRegisterPlugin)
				throw std::runtime_error("Plugin is not valid");
		}
		catch(...)
		{
			::FreeModule(g_hDLL);
			throw std::runtime_error("Plugin is not valid");
		}
	}

	Plugin::~Plugin()
	{
		if(g_referenceCount<=0 && g_hDLL != NULL)
			::FreeModule(g_hDLL);
	}
}