/**
 *    Copyright (C) 2018-present MongoDB, Inc.
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the Server Side Public License, version 1,
 *    as published by MongoDB, Inc.
 *
 *    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
 *    Server Side Public License for more details.
 *
 *    You should have received a copy of the Server Side Public License
 *    along with this program. If not, see
 *    <http://www.mongodb.com/licensing/server-side-public-license>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the Server Side Public License in all respects for
 *    all of the code used other than as permitted herein. If you modify file(s)
 *    with this exception, you may extend this exception to your version of the
 *    file(s), but you are not obligated to do so. If you do not wish to do so,
 *    delete this exception statement from your version. If you delete this
 *    exception statement from all source files in the program, then also delete
 *    it in the license file.
 */

#include "mongo/platform/basic.h"

#include "mongo/bson/json.h"
#include "mongo/db/matcher/matcher.h"
#include "mongo/db/matcher/schema/expression_internal_schema_root_doc_eq.h"
#include "mongo/db/pipeline/expression_context_for_test.h"
#include "mongo/unittest/unittest.h"

namespace mongo {
namespace {

TEST(InternalSchemaRootDocEqMatchExpression, MatchesObject) {
    InternalSchemaRootDocEqMatchExpression rootDocEq(BSON("a" << 1 << "b"
                                                              << "string"));
    ASSERT_TRUE(rootDocEq.matchesBSON(BSON("a" << 1 << "b"
                                               << "string")));
    ASSERT_FALSE(rootDocEq.matchesBSON(BSON("a" << 2 << "b"
                                                << "string")));
}

TEST(InternalSchemaRootDocEqMatchExpression, MatchesNestedObject) {
    InternalSchemaRootDocEqMatchExpression rootDocEq(BSON("a" << 1 << "b" << BSON("c" << 1)));
    ASSERT_TRUE(rootDocEq.matchesBSON(BSON("a" << 1 << "b" << BSON("c" << 1))));
    ASSERT_FALSE(rootDocEq.matchesBSON(BSON("a" << 1 << "b" << BSON("c" << 2))));
}

TEST(InternalSchemaRootDocEqMatchExpression, MatchesObjectIgnoresElementOrder) {
    InternalSchemaRootDocEqMatchExpression rootDocEq(BSON("a" << 1 << "b" << BSON("c" << 1)));
    ASSERT_TRUE(rootDocEq.matchesBSON(BSON("b" << BSON("c" << 1) << "a" << 1)));
}

TEST(InternalSchemaRootDocEqMatchExpression, MatchesNestedObjectIgnoresElementOrder) {
    InternalSchemaRootDocEqMatchExpression rootDocEq(BSON("a" << BSON("b" << 1 << "c" << 1)));
    ASSERT_TRUE(rootDocEq.matchesBSON(BSON("a" << BSON("c" << 1 << "b" << 1))));
}

TEST(InternalSchemaRootDocEqMatchExpression, MatchesEmptyObject) {
    InternalSchemaRootDocEqMatchExpression rootDocEq{BSONObj()};
    ASSERT_TRUE(rootDocEq.matchesBSON(BSONObj()));
}

TEST(InternalSchemaRootDocEqMatchExpression, MatchesNestedArray) {
    InternalSchemaRootDocEqMatchExpression rootDocEq(BSON("a" << BSON_ARRAY(1 << 2 << 3)));
    ASSERT_TRUE(rootDocEq.matchesBSON(BSON("a" << BSON_ARRAY(1 << 2 << 3))));
    ASSERT_FALSE(rootDocEq.matchesBSON(BSON("a" << BSON_ARRAY(1 << 3 << 2))));
}

TEST(InternalSchemaRootDocEqMatchExpression, MatchesObjectWithNullElement) {
    InternalSchemaRootDocEqMatchExpression rootDocEq(fromjson("{a: null}"));
    ASSERT_TRUE(rootDocEq.matchesBSON(fromjson("{a: null}")));
    ASSERT_FALSE(rootDocEq.matchesBSON(fromjson("{a: 1}")));
    ASSERT_FALSE(rootDocEq.matchesBSON(fromjson("{}")));
    ASSERT_FALSE(rootDocEq.matchesBSON(fromjson("{a: undefined}")));
}

TEST(InternalSchemaRootDocEqMatchExpression, EquivalentReturnsCorrectResults) {
    auto query = fromjson(R"(
             {$_internalSchemaRootDocEq: {
                 b: 1, c: 1
             }})");
    boost::intrusive_ptr<ExpressionContextForTest> expCtx(new ExpressionContextForTest());
    Matcher rootDocEq(std::move(query), expCtx);

    query = fromjson(R"(
             {$_internalSchemaRootDocEq: {
                 c: 1, b: 1
             }})");
    Matcher exprEq(std::move(query), expCtx);
    ASSERT_TRUE(rootDocEq.getMatchExpression()->equivalent(exprEq.getMatchExpression()));

    query = fromjson(R"(
             {$_internalSchemaRootDocEq: {
                 c: 1
             }})");
    Matcher exprNotEq(std::move(query), expCtx);
    ASSERT_FALSE(rootDocEq.getMatchExpression()->equivalent(exprNotEq.getMatchExpression()));
}

TEST(InternalSchemaRootDocEqMatchExpression, EquivalentToClone) {
    auto query = fromjson("{$_internalSchemaRootDocEq: {a:1, b: {c: 1, d: [1]}}}");
    boost::intrusive_ptr<ExpressionContextForTest> expCtx(new ExpressionContextForTest());
    Matcher rootDocEq(std::move(query), expCtx);

    auto clone = rootDocEq.getMatchExpression()->shallowClone();
    ASSERT_TRUE(rootDocEq.getMatchExpression()->equivalent(clone.get()));
}
}  // namespace
}  // namespace mongo