/**
 * Relational pipes
 * Copyright © 2019 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/>.
 */

#include "Connection.h"

namespace relpipe {
namespace tr {
namespace sql {

void Connection::begin() {
	sqlite3_exec(db, "BEGIN", nullptr, nullptr, nullptr);
}

Connection::Connection(const char* filename) {
	int result = sqlite3_open(filename, &db);
	if (result != SQLITE_OK) {
		sqlite3_close(db);
		throw SqlException(L"Unable to open SQLite database.");
	}
	begin();
}

Connection::~Connection() {
	sqlite3_close(db);
}

PreparedStatement* Connection::prepareStatement(const char* sql) {
	const char* remaining;
	sqlite3_stmt *stmt;
	int result = sqlite3_prepare(db, sql, -1, &stmt, &remaining);
	if (result == SQLITE_OK) return new PreparedStatement(stmt);
	else throw SqlException(L"Unable to prepare SQLite statement.");
}

bool Connection::getAutoCommit() {
	return sqlite3_get_autocommit(db);
}

void Connection::setAutoCommit(bool autoCommit) {
	bool autoCommitOld = getAutoCommit();
	if (autoCommit && !autoCommitOld) commit();
	else if (!autoCommit && autoCommitOld) begin();
}

void Connection::commit() {
	sqlite3_exec(db, "COMMIT", nullptr, nullptr, nullptr);
}

void Connection::rollback() {
	sqlite3_exec(db, "ROLLBACK", nullptr, nullptr, nullptr);
}

}
}
}