//////////////////////////////////////////////////////////////////////////
//
// pgAdmin III - PostgreSQL Tools
//
// Copyright (C) 2002 - 2016, The pgAdmin Development Team
// This software is released under the PostgreSQL Licence
//
// pgSet.h - PostgreSQL ResultSet class
//
//////////////////////////////////////////////////////////////////////////

#ifndef PGSET_H
#define PGSET_H

// wxWindows headers
#include <wx/wx.h>
#include <wx/datetime.h>

// PostgreSQL headers
#include <libpq-fe.h>

#include "utils/misc.h"

typedef enum
{
	PGTYPCLASS_NUMERIC = 1,
	PGTYPCLASS_BOOL,
	PGTYPCLASS_STRING,
	PGTYPCLASS_DATE,
	PGTYPCLASS_OTHER
} pgTypClass;

class pgConn;

// Class declarations
class pgSet
{
public:
	pgSet();
	pgSet(PGresult *newRes, pgConn *newConn, wxMBConv &cnv, bool needColQt);
	~pgSet();
	long NumRows() const
	{
		return nRows;
	}
	long NumCols() const
	{
		return nCols;
	}

	void MoveNext()
	{
		if (pos <= nRows) pos++;
	}
	void MovePrevious()
	{
		if (pos > 0) pos--;
	}
	void MoveFirst()
	{
		if (nRows) pos = 1;
		else pos = 0;
	}
	void MoveLast()
	{
		pos = nRows;
	}
	void Locate(long l)
	{
		pos = l;
	}
	long CurrentPos() const
	{
		return pos;
	}
	bool Bof() const
	{
		return (!nRows || pos < 1);
	}
	bool Eof() const
	{
		return (!nRows || pos > nRows);
	}
	wxString ColName(const int col) const;
	OID ColTypeOid(const int col) const;
	long ColTypeMod(const int col) const;
	wxString ColType(const int col) const;
	wxString ColFullType(const int col) const;
	pgTypClass ColTypClass(const int col) const;

	OID GetInsertedOid() const
	{
		return PQoidValue(res);
	}
	long GetInsertedCount() const;
	int ColSize(const int col) const
	{
		return PQfsize(res, col);
	}
	bool IsNull(const int col) const
	{
		return (PQgetisnull(res, pos - 1, col) != 0);
	}
	int ColScale(const int col) const;
	int ColNumber(const wxString &colName) const;
	bool HasColumn(const wxString &colname) const;


	wxString GetVal(const int col) const;
	wxString GetVal(const wxString &col) const;
	long GetLong(const int col) const;
	long GetLong(const wxString &col) const;
	bool GetBool(const int col) const;
	bool GetBool(const wxString &col) const;
	double GetDouble(const int col) const;
	double GetDouble(const wxString &col) const;
	wxDateTime GetDateTime(const int col) const;
	wxDateTime GetDateTime(const wxString &col) const;
	wxDateTime GetDate(const int col) const;
	wxDateTime GetDate(const wxString &col) const;
	wxULongLong GetLongLong(const int col) const;
	wxULongLong GetLongLong(const wxString &col) const;
	OID GetOid(const int col) const;
	OID GetOid(const wxString &col) const;

	char *GetCharPtr(const int col) const;
	char *GetCharPtr(const wxString &col) const;

	wxMBConv &GetConversion() const
	{
		return conv;
	}

	wxString GetCommandStatus() const
	{
		if (res)
		{
			return wxString(PQcmdStatus(res), conv);
		}
		return wxEmptyString;
	}

protected:
	pgConn *conn;
	PGresult *res;
	long pos, nRows, nCols;
	wxString ExecuteScalar(const wxString &sql) const;
	wxMBConv &conv;
	bool needColQuoting;
	mutable wxArrayString colTypes, colFullTypes;
	mutable wxArrayInt colClasses;
	 
};



class pgSetIterator
{
public:
	pgSetIterator(pgSet *s);
	pgSetIterator(pgConn *conn, const wxString &sql);
	~pgSetIterator();

	bool RowsLeft();
	bool MovePrev();
	bool IsValid()
	{
		return set != 0;
	}
	pgSet *Set()
	{
		return set;
	}

	wxString GetVal(const int col) const
	{
		return set->GetVal(col);
	}
	wxString GetVal(const wxString &col) const
	{
		return set->GetVal(col);
	}
	long GetLong(const int col) const
	{
		return set->GetLong(col);
	}
	long GetLong(const wxString &col) const
	{
		return set->GetLong(col);
	}
	bool GetBool(const int col) const
	{
		return set->GetBool(col);
	}
	bool GetBool(const wxString &col) const
	{
		return set->GetBool(col);
	}
	double GetDouble(const int col) const
	{
		return set->GetDouble(col);
	}
	double GetDouble(const wxString &col) const
	{
		return set->GetDouble(col);
	}
	wxDateTime GetDateTime(const int col) const
	{
		return set->GetDateTime(col);
	}
	wxDateTime GetDateTime(const wxString &col) const
	{
		return set->GetDateTime(col);
	}
	wxDateTime GetDate(const int col) const
	{
		return set->GetDate(col);
	}
	wxDateTime GetDate(const wxString &col) const
	{
		return set->GetDate(col);
	}
	wxULongLong GetLongLong(const int col) const
	{
		return set->GetLongLong(col);
	}
	wxULongLong GetLongLong(const wxString &col) const
	{
		return set->GetLongLong(col);
	}
	OID GetOid(const int col) const
	{
		return set->GetOid(col);
	}
	OID GetOid(const wxString &col) const
	{
		return set->GetOid(col);
	}

protected:
	pgSet *set;
	bool first;
};

#endif