/*
 * Copyright contributors to Hyperledger Besu.
 *
 * Licensed 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
package org.hyperledger.besu.ethereum.mainnet.headervalidationrules;

import static java.lang.Long.MAX_VALUE;
import static org.assertj.core.api.Assertions.assertThat;

import org.hyperledger.besu.datatypes.Wei;
import org.hyperledger.besu.ethereum.core.BlockHeader;
import org.hyperledger.besu.ethereum.core.BlockHeaderTestFixture;
import org.hyperledger.besu.ethereum.mainnet.feemarket.BaseFeeMarket;
import org.hyperledger.besu.ethereum.mainnet.feemarket.FixedBaseFeeMarket;

import java.util.Optional;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;

public class GasLimitElasticityValidationRuleFixedBaseFeeMarketTest {

  private static final Optional<BaseFeeMarket> fixedBaseFeeMarket =
      Optional.of(new FixedBaseFeeMarket(10, Wei.ONE));

  public GasLimitRangeAndDeltaValidationRule uut =
      new GasLimitRangeAndDeltaValidationRule(5000, MAX_VALUE, fixedBaseFeeMarket);

  @ParameterizedTest
  @CsvSource({
    "20000000, 10000000, 10, true",
    "20019530, 10000000, 10, true",
    "20019531, 10000000, 10, false",
    "19980470, 10000000, 10, true",
    "19980469, 10000000, 10, false",
    "20000000, 20000000, 11, true",
    "20019530, 20000000, 11, true",
    "20019531, 20000000, 11, false",
    "19980470, 20000000, 11, true",
    "19980469, 20000000, 11, false",
    "40039061, 40000000, 11, true",
    "40039062, 40000000, 11, false",
    "39960939, 40000000, 11, true",
    "39960938, 40000000, 11, false",
    "4999, 40000000, 11, false"
  })
  public void test(
      final long headerGasLimit,
      final long parentGasLimit,
      final long headerNumber,
      final boolean expectedResult) {

    final BlockHeaderTestFixture blockHeaderBuilder = new BlockHeaderTestFixture();

    blockHeaderBuilder.number(headerNumber);
    blockHeaderBuilder.gasLimit(headerGasLimit);
    final BlockHeader header = blockHeaderBuilder.buildHeader();

    blockHeaderBuilder.number(headerNumber - 1);
    blockHeaderBuilder.gasLimit(parentGasLimit);
    final BlockHeader parent = blockHeaderBuilder.buildHeader();

    assertThat(uut.validate(header, parent)).isEqualTo(expectedResult);
  }

  @Test
  void dryRunDetector() {
    assertThat(true)
        .withFailMessage("This test is here so gradle --dry-run executes this class")
        .isTrue();
  }
}
