/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 **/

#ifndef QUICKSTEP_QUERY_OPTIMIZER_STRATEGY_TESTS_STRATEGY_TEST_HPP_
#define QUICKSTEP_QUERY_OPTIMIZER_STRATEGY_TESTS_STRATEGY_TEST_HPP_

#include "query_optimizer/logical/Logical.hpp"
#include "query_optimizer/physical/Physical.hpp"
#include "query_optimizer/strategy/Strategy.hpp"
#include "query_optimizer/tests/OptimizerTest.hpp"
#include "utility/Macros.hpp"

/**
 * @brief Macro that applies a strategy to the input logical plan and
 *        compares the generated physical plan with the expected one.
 */
#define EXPECT_CORRECT_PHYSICAL()                                                \
  do {                                                                           \
    CHECK(input_logical_ != nullptr);                                            \
    CHECK(expected_physical_ != nullptr);                                        \
    CHECK(strategy_ != nullptr);                                                 \
    actual_physical_.reset();                                                    \
    strategy_->generatePlan(input_logical_, &actual_physical_);                  \
    EXPECT_TRUE(actual_physical_ != nullptr);                                    \
    EXPECT_TRUE(expected_physical_->toString() == actual_physical_->toString())  \
        << "Expected tree:\n" << expected_physical_->toString()                  \
        << "Actual tree:\n" << actual_physical_->toString();                     \
  } while (false)

/**
 * @brief Macro that applies a strategy to the input logical plan and
 *        verifies that the output physical plan is NULL (i.e. the strategy
 *        is not applicable).
 */
#define EXPECT_STRATEGY_NOT_APPLIED()                                            \
  do {                                                                           \
    CHECK(input_logical_ != nullptr);                                            \
    CHECK(strategy_ != nullptr);                                                 \
    actual_physical_.reset();                                                    \
    strategy_->generatePlan(input_logical_, &actual_physical_);                  \
    EXPECT_TRUE(actual_physical_ == nullptr);                                    \
  } while (false)

namespace quickstep {
namespace optimizer {
namespace strategy {

/** \addtogroup OptimizerStrategy
 *  @{
 */

/**
 * @brief Base class for strategy tests.
 */
class StrategyTest : public OptimizerTest {
 public:
  /**
   * @brief Destructor.
   */
  ~StrategyTest() override {}

  /**
   * @brief Sets the strategy to test.
   *
   * @param strategy The strategy to test.
   */
  virtual void setupStrategy(std::unique_ptr<Strategy> *strategy) = 0;

  void SetUp() override {
    OptimizerTest::SetUp();
    setupStrategy(&strategy_);
  }

 protected:
  /**
   * @brief Constructor.
   */
  StrategyTest() {}

  std::unique_ptr<Strategy> strategy_;

  logical::LogicalPtr input_logical_;
  physical::PhysicalPtr expected_physical_;
  physical::PhysicalPtr actual_physical_;

 private:
  DISALLOW_COPY_AND_ASSIGN(StrategyTest);
};

/** @} */

}  // namespace strategy
}  // namespace optimizer
}  // namespace quickstep

#endif /* QUICKSTEP_QUERY_OPTIMIZER_STRATEGY_TESTS_STRATEGYTEST_HPP_ */