//////////////////////////////////////////////////////////////////////////
//
// pgAdmin III - PostgreSQL Tools
// RCS-ID:
// Copyright (C) 2002 - 2016, The pgAdmin Development Team
// This software is released under the PostgreSQL Licence
//
// registry.h - Windows Registry Reader for both 32 and 64 mode
//
//////////////////////////////////////////////////////////////////////////

#ifndef __PGREG_WINREGISTRY_H__
#define __PGREG_WINREGISTRY_H__

#ifdef __WXMSW__

#include <windows.h>

class pgRegKey
{

public:
	enum PGREGWOWMODE
	{
		/*
		 * Read/Write 32 bit registry for 32 bit applications,
		 * Read/Write 64 bit registry for 64 bit applications
		 */
		PGREG_WOW_DEFAULT,
		/* Read/Write 32 bit registry */
		PGREG_WOW32,
		/* Read/Write 64 bit registry on 64 bit windows */
		PGREG_WOW64
	};

	enum PGREGACCESSMODE
	{
		/* READ ONLY */
		PGREG_READ,
		/* READ & Write */
		PGREG_WRITE
	};

public:
	static pgRegKey *OpenRegKey(HKEY root, const wxString &subkey, PGREGACCESSMODE accessmode = PGREG_READ, PGREGWOWMODE wowMode = PGREG_WOW_DEFAULT);
	~pgRegKey();

	static bool KeyExists(HKEY root, const wxString &subKey, PGREGWOWMODE wowMode = PGREG_WOW_DEFAULT);

	bool  GetKeyInfo(size_t *pnSubKeys,      // number of subkeys
	                 size_t *pnMaxKeyLen,    // max len of subkey name
	                 size_t *pnValues,       // number of values
	                 size_t *pnMaxValueLen) const;

	bool QueryValue(const wxString &strVal, LPDWORD pVal) const;
	bool QueryValue(const wxString &strVal, wxString &pVal) const;
	bool QueryValue(const wxString &strVal, LPBYTE  &pVal, DWORD &len) const;

	bool GetFirstValue(wxString &strVal, long &lindex) const;
	bool GetNextValue(wxString &strVal, long &lindex) const;
	bool HasValue(const wxString &strVal);

	bool GetFirstKey(pgRegKey *&pkey, long &lindex) const;
	bool GetNextKey(pgRegKey *&pkey, long &lindex) const;
	bool HasKey(const wxString &strKey) const;

	DWORD GetValueType(const wxString &strVal) const;

	wxString ToString() const;
	wxString GetKeyName() const;

private:
	pgRegKey(HKEY root, const wxString &subkey, PGREGWOWMODE wowMode, PGREGACCESSMODE accessMode);
	pgRegKey(const pgRegKey &keyParent, const wxString &strKey);

	void Init(HKEY root, const wxString &subkey, PGREGWOWMODE wowMode, PGREGACCESSMODE accessMode);
	void Close();

	HKEY            m_hRoot;
	HKEY            m_hKey;
	wxString        m_strName;
	DWORD           m_wowMode;
	PGREGACCESSMODE m_accessMode;

};

#endif // __WXMSW__
#endif // __PGREG_WINREGISTRY_H__