/**
 * Relational pipes
 * Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
#pragma once

#include <vector>
#include <map>
#include <codecvt>
#include <locale>

#include <relpipe/reader/typedefs.h>

#include "SqlException.h"
#include "Connection.h"

namespace relpipe {
namespace tr {
namespace sql {

/**
 * Common principles in this SQL layer:
 *  - Numbering starts with 1, not 0. First parameter or column = 1.
 *  - If you got a pointer returned from a method or function, you are then responsible for given object.
 *    Wrapping it immediatelly in a smart pointer is a convenient way to manage its lifecycle.
 *    Statements should be destroyed before the Connection. And Connection should be destroyed before DriverManager.
 */
class DriverManager {
private:
	void* environment;
	std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings

public:

	class DataSource {
	public:
		relpipe::reader::string_t name;
		relpipe::reader::string_t description;
	};

	DriverManager();
	virtual ~DriverManager();
	std::vector<DataSource> getDataSources();
	Connection* getConnectionByDSN(relpipe::reader::string_t dataSourceName, relpipe::reader::string_t userName = L"", relpipe::reader::string_t password = L"");
	Connection* getConnectionByString(relpipe::reader::string_t connectionString);
};

}
}
}