/**
 * 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.
 */

package org.apache.hadoop.fs.azurebfs.contracts.services;

/**
 * Saves the different request parameters for append
 */
public class AppendRequestParameters {
  public enum Mode {
    APPEND_MODE,
    FLUSH_MODE,
    FLUSH_CLOSE_MODE
  }

  private final long position;
  private final int offset;
  private final int length;
  private final Mode mode;
  private final boolean isAppendBlob;
  private final String leaseId;
  private boolean isExpectHeaderEnabled;
  private boolean isRetryDueToExpect;
  private BlobAppendRequestParameters blobParams;
  private final String md5;


  /**
   * Constructor to be used for interacting with AbfsDfsClient.
   * @param position position in remote blob at which append should happen
   * @param offset position in the buffer to be appended
   * @param length length of the data to be appended
   * @param mode mode of the append operation
   * @param isAppendBlob true if the blob is append-blob
   * @param leaseId leaseId of the blob to be appended
   * @param isExpectHeaderEnabled true if the expect header is enabled
   * @param md5  The Base64-encoded MD5 hash of the block for data integrity validation.
   */
  public AppendRequestParameters(final long position,
      final int offset,
      final int length,
      final Mode mode,
      final boolean isAppendBlob,
      final String leaseId,
      final boolean isExpectHeaderEnabled,
      final String md5) {
    this.position = position;
    this.offset = offset;
    this.length = length;
    this.mode = mode;
    this.isAppendBlob = isAppendBlob;
    this.leaseId = leaseId;
    this.isExpectHeaderEnabled = isExpectHeaderEnabled;
    this.isRetryDueToExpect = false;
    this.blobParams = null;
    this.md5 = md5;
  }

  /**
   * Constructor to be used for interacting with AbfsBlobClient.
   * @param position position in remote blob at which append should happen
   * @param offset position in the buffer to be appended
   * @param length length of the data to be appended
   * @param mode mode of the append operation
   * @param isAppendBlob true if the blob is append-blob
   * @param leaseId leaseId of the blob to be appended
   * @param isExpectHeaderEnabled true if the expect header is enabled
   * @param blobParams parameters specific to append operation on Blob Endpoint.
   * @param md5  The Base64-encoded MD5 hash of the block for data integrity validation.
   */
  public AppendRequestParameters(final long position,
      final int offset,
      final int length,
      final Mode mode,
      final boolean isAppendBlob,
      final String leaseId,
      final boolean isExpectHeaderEnabled,
      final BlobAppendRequestParameters blobParams,
      final String md5) {
    this.position = position;
    this.offset = offset;
    this.length = length;
    this.mode = mode;
    this.isAppendBlob = isAppendBlob;
    this.leaseId = leaseId;
    this.isExpectHeaderEnabled = isExpectHeaderEnabled;
    this.isRetryDueToExpect = false;
    this.blobParams = blobParams;
    this.md5 = md5;
  }

  public long getPosition() {
    return this.position;
  }

  public int getoffset() {
    return this.offset;
  }

  public int getLength() {
    return this.length;
  }

  public Mode getMode() {
    return this.mode;
  }

  public boolean isAppendBlob() {
    return this.isAppendBlob;
  }

  public String getLeaseId() {
    return this.leaseId;
  }

  public boolean isExpectHeaderEnabled() {
    return isExpectHeaderEnabled;
  }

  public boolean isRetryDueToExpect() {
    return isRetryDueToExpect;
  }

  /**
   * Retrieves the parameters specific to the append operation on the Blob Endpoint.
   *
   * @return the {@link BlobAppendRequestParameters} for the append operation.
   */
  public BlobAppendRequestParameters getBlobParams() {
    return blobParams;
  }

  /**
   * Returns BlockId of the block blob to be appended.
   * @return blockId
   */
  public String getBlockId() {
    return getBlobParams().getBlockId();
  }

  /**
   * Gets the MD5 hash.
   *
   * @return the MD5 hash string
   */
  public String getMd5() {
    return md5;
  }

  /**
   * Sets whether the retry is due to the Expect header.
   *
   * @param retryDueToExpect true if the retry is due to the Expect header, false otherwise
   */
  public void setRetryDueToExpect(boolean retryDueToExpect) {
    isRetryDueToExpect = retryDueToExpect;
  }

  /**
   * Sets whether the Expect header is enabled.
   *
   * @param expectHeaderEnabled true if the Expect header is enabled, false otherwise
   */
  public void setExpectHeaderEnabled(boolean expectHeaderEnabled) {
    isExpectHeaderEnabled = expectHeaderEnabled;
  }

  /**
   * Sets the Block ID for the block blob to be appended.
   *
   * @param blockId the Block ID to set
   */
  public void setBlockId(final String blockId) {
    this.getBlobParams().setBlockId(blockId);
  }

  /**
   * Sets the ETag for the block blob.
   *
   * @param eTag the ETag to set
   */
  public void setEtag(final String eTag) {
    this.getBlobParams().setETag(eTag);
  }

  /**
   * Sets the parameters specific to the append operation on the Blob Endpoint.
   *
   * @param blobParams the {@link BlobAppendRequestParameters} to set
   */
  public void setBlobParams(BlobAppendRequestParameters blobParams) {
    this.blobParams = blobParams;
  }
}
