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/*
 * Copyright © 2021-present Arcade Data Ltd ([email protected])
 *
 * 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-FileCopyrightText: 2021-present Arcade Data Ltd ([email protected])
 * SPDX-License-Identifier: Apache-2.0
 */
package com.arcadedb.database;

import com.arcadedb.exception.RecordNotFoundException;
import com.arcadedb.graph.Edge;
import com.arcadedb.graph.Vertex;

import java.util.*;

public abstract class BaseRecord implements Record {
  protected final DatabaseInternal database;
  protected       RID              rid;
  protected       Binary           buffer;

  protected BaseRecord(final Database database, final RID rid, final Binary buffer) {
    this.database = (DatabaseInternal) database;
    this.rid = rid;
    this.buffer = buffer;
  }

  @Override
  public RID getIdentity() {
    return rid;
  }

  @Override
  public Record getRecord() {
    return this;
  }

  @Override
  public Record getRecord(final boolean loadContent) {
    return this;
  }

  @Override
  public void reload() {
    if (rid != null && buffer == null && database.isOpen()) {
      try {
        buffer = database.getSchema().getBucketById(rid.getBucketId()).getRecord(rid);

        final Record loaded = database.invokeAfterReadEvents(this);
        if (loaded == null) {
          buffer = null;
        } else if (loaded != this) {
          // CREATE A BUFFER FROM THE MODIFIED RECORD
          buffer = ((RecordInternal) loaded).getBuffer().copy();
        }

      } catch (final RecordNotFoundException e) {
        // IGNORE IT
      }
    }
  }

  @Override
  public void delete() {
    database.deleteRecord(this);
  }

  @Override
  public boolean equals(final Object o) {
    if (this == o)
      return true;
    if (!(o instanceof Identifiable))
      return false;

    final RID pRID = ((Identifiable) o).getIdentity();

    return Objects.equals(rid, pRID);
  }

  @Override
  public int hashCode() {
    return rid != null ? rid.hashCode() : super.hashCode();
  }

  @Override
  public String toString() {
    return rid != null ? rid.toString() : "#?:?";
  }

  @Override
  public Database getDatabase() {
    return database;
  }

  public Binary getBuffer() {
    return buffer;
  }

  public void setBuffer(final Binary buffer) {
    this.buffer = buffer;
  }

  @Override
  public Document asDocument() {
    if (this instanceof Edge)
      throw new ClassCastException("Cannot cast an edge to a document");
    if (this instanceof Vertex)
      throw new ClassCastException("Cannot cast a vertex to a document");
    throw new ClassCastException("Current record is not a document");
  }

  @Override
  public Document asDocument(final boolean loadContent) {
    if (this instanceof Edge)
      throw new ClassCastException("Cannot cast the edge " + getIdentity() + " to a document");
    if (this instanceof Vertex)
      throw new ClassCastException("Cannot cast the vertex " + getIdentity() + " to a document");
    throw new ClassCastException("Current record is not a document");
  }

  @Override
  public Vertex asVertex() {
    if (this instanceof Edge)
      throw new ClassCastException("Cannot cast the edge " + getIdentity() + " to a vertex");
    if (this instanceof Document)
      throw new ClassCastException("Cannot cast the document " + getIdentity() + " to a vertex");
    throw new ClassCastException("Current record is not a vertex");
  }

  @Override
  public Vertex asVertex(final boolean loadContent) {
    if (this instanceof Edge)
      throw new ClassCastException("Cannot cast the edge " + getIdentity() + " to a vertex");
    if (this instanceof Document)
      throw new ClassCastException("Cannot cast the document " + getIdentity() + " to a vertex");
    throw new ClassCastException("Current record is not a vertex");
  }

  @Override
  public Edge asEdge() {
    if (this instanceof Vertex)
      throw new ClassCastException("Cannot cast the vertex " + getIdentity() + " to an edge");
    if (this instanceof Document)
      throw new ClassCastException("Cannot cast the document " + getIdentity() + " to an edge");
    throw new ClassCastException("Current record is not a edge");
  }

  @Override
  public Edge asEdge(final boolean loadContent) {
    if (this instanceof Vertex)
      throw new ClassCastException("Cannot cast the vertex " + getIdentity() + " to an edge");
    if (this instanceof Document)
      throw new ClassCastException("Cannot cast the document " + getIdentity() + " to an edge");
    throw new ClassCastException("Current record is not a edge");
  }
}