/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <gtest/gtest.h>

#include "querynodes.h"

using namespace std;

static EDealRes rewriterTest(SNode** pNode, void* pContext) {
	EDealRes* pRes = (EDealRes*)pContext;
	if (QUERY_NODE_OPERATOR == nodeType(*pNode)) {
		SOperatorNode* pOp = (SOperatorNode*)(*pNode);
		if (QUERY_NODE_VALUE != nodeType(pOp->pLeft) || QUERY_NODE_VALUE != nodeType(pOp->pRight)) {
			*pRes = DEAL_RES_ERROR;
		}
		SValueNode* pVal = (SValueNode*)nodesMakeNode(QUERY_NODE_VALUE);
		string tmp = to_string(stoi(((SValueNode*)(pOp->pLeft))->literal) + stoi(((SValueNode*)(pOp->pRight))->literal));
		pVal->literal = strdup(tmp.c_str());
		nodesDestroyNode(*pNode);
		*pNode = (SNode*)pVal;
	}
	return DEAL_RES_CONTINUE;
}

TEST(NodesTest, traverseTest) {
	SNode* pRoot = (SNode*)nodesMakeNode(QUERY_NODE_OPERATOR);
	SOperatorNode* pOp = (SOperatorNode*)pRoot;
	SOperatorNode* pLeft = (SOperatorNode*)nodesMakeNode(QUERY_NODE_OPERATOR);
	pLeft->pLeft = (SNode*)nodesMakeNode(QUERY_NODE_VALUE);
	((SValueNode*)(pLeft->pLeft))->literal = strdup("10");
	pLeft->pRight = (SNode*)nodesMakeNode(QUERY_NODE_VALUE);
	((SValueNode*)(pLeft->pRight))->literal = strdup("5");
	pOp->pLeft = (SNode*)pLeft;
	pOp->pRight = (SNode*)nodesMakeNode(QUERY_NODE_VALUE);
	((SValueNode*)(pOp->pRight))->literal = strdup("3");

	EXPECT_EQ(nodeType(pRoot), QUERY_NODE_OPERATOR);
	EDealRes res = DEAL_RES_CONTINUE;
	nodesRewriteNodePostOrder(&pRoot, rewriterTest, &res);
	EXPECT_EQ(res, DEAL_RES_CONTINUE);
	EXPECT_EQ(nodeType(pRoot), QUERY_NODE_VALUE);
	EXPECT_EQ(string(((SValueNode*)pRoot)->literal), "18");
}

int main(int argc, char* argv[]) {
	testing::InitGoogleTest(&argc, argv);
	return RUN_ALL_TESTS();
}
