/**
 * This file is part of the Meeds project (https://meeds.io/).
 *
 * Copyright (C) 2020 - 2025 Meeds Association contact@meeds.io
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 * 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 GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.picketlink.idm.impl.model.hibernate;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.hibernate.annotations.Fetch;
import org.hibernate.annotations.FetchMode;
import org.picketlink.idm.spi.model.IdentityObjectAttribute;

import jakarta.persistence.CascadeType;
import jakarta.persistence.CollectionTable;
import jakarta.persistence.Column;
import jakarta.persistence.ElementCollection;
import jakarta.persistence.Entity;
import jakarta.persistence.FetchType;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.JoinColumn;
import jakarta.persistence.ManyToOne;
import jakarta.persistence.NamedQuery;
import jakarta.persistence.SequenceGenerator;
import jakarta.persistence.Table;

@Entity(name = "HibernateIdentityObjectAttribute")
@Table(name = "jbid_io_attr")
@NamedQuery(
    name = "HibernateIdentityObjectAttribute.findIdentityAttributes",
    query = "SELECT a FROM HibernateIdentityObjectAttribute a INNER JOIN a.identityObject io ON io =:identity")
public class HibernateIdentityObjectAttribute implements IdentityObjectAttribute {

  public static final String                          TYPE_TEXT   = "text";

  public static final String                          TYPE_BINARY = "binary";

  @Id
  @GeneratedValue(strategy = GenerationType.AUTO, generator="JBID_IO_ATTR_ID_SEQ")
  @SequenceGenerator(name = "JBID_IO_ATTR_ID_SEQ", sequenceName = "JBID_IO_ATTR_ID_SEQ", allocationSize = 1)
  @Column(name = "ATTRIBUTE_ID")
  private Long                                        id;

  @ManyToOne
  @Fetch(FetchMode.JOIN)
  @JoinColumn(name = "IDENTITY_OBJECT_ID",
      nullable = false)
  private HibernateIdentityObject                     identityObject;

  @Column(name = "NAME")
  private String                                      name;

  @Column(name = "ATTRIBUTE_TYPE",
      nullable = false)
  private String                                      type;

  @ManyToOne(fetch = FetchType.LAZY,
      cascade = CascadeType.ALL)
  @Fetch(FetchMode.SELECT)
  @JoinColumn(name = "BIN_VALUE_ID")
  private HibernateIdentityObjectAttributeBinaryValue binaryValue = null;

  @ElementCollection(fetch = FetchType.EAGER)
  @Column(name = "ATTR_VALUE")
  @CollectionTable(
      name = "jbid_io_attr_text_values",
      joinColumns = { @JoinColumn(name = "TEXT_ATTR_VALUE_ID",
          referencedColumnName = "ATTRIBUTE_ID") })
  @Fetch(FetchMode.JOIN)
  private Set<String>                                 textValues  = new HashSet<String>();

  public HibernateIdentityObjectAttribute() {
  }

  public HibernateIdentityObjectAttribute(HibernateIdentityObject identityObject, String name, String type) {
    this.identityObject = identityObject;
    this.name = name;
    setType(type);
  }

  public Long getId() {
    return id;
  }

  public void setId(Long id) {
    this.id = id;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public HibernateIdentityObject getIdentityObject() {
    return identityObject;
  }

  public void setIdentityObject(HibernateIdentityObject identityObject) {
    this.identityObject = identityObject;
  }

  public String getType() {
    return type;
  }

  public void setType(String newType) {
    if (!newType.equals(TYPE_TEXT) && !newType.equals(TYPE_BINARY)) {
      throw new IllegalArgumentException("Type has not supported value." + " Name=" + name + "; type=" + type);
    }
    this.type = newType;
  }

  public HibernateIdentityObjectAttributeBinaryValue getBinaryValue() {
    return binaryValue;
  }

  public void setBinaryValue(HibernateIdentityObjectAttributeBinaryValue binaryValue) {
    this.binaryValue = binaryValue;
  }

  public Set<String> getTextValues() {
    return Collections.unmodifiableSet(textValues);
  }

  public void setTextValues(Collection<String> textValues) {
    this.textValues.clear();
    this.textValues.addAll(textValues);
  }

  public void addTextValue(String value) {
    getTextValues().add(value);
  }

  public Object getValue() {
    if (type.equals(TYPE_TEXT)) {
      if (getTextValues().size() > 0) {
        return getTextValues().iterator().next();
      } else {
        return null;
      }
    } else if (type.equals(TYPE_BINARY)) {
      return getBinaryValue().getValue();
    } else {
      throw new IllegalStateException("Type has not supported value." + " Name=" + name + "; type=" + type);
    }
  }

  public void addValue(Object value) {
    if (type.equals(TYPE_TEXT)) {
      if (!(value instanceof String)) {
        throw new IllegalArgumentException("String value expected with a set type." + " Name=" + name + "; type=" + type);
      }
      addTextValue((String) value);
    } else if (type.equals(TYPE_BINARY)) {
      if (!(value instanceof byte[])) {
        throw new IllegalArgumentException("byte[] value expected with a set type." + " Name=" + name + "; type=" + type);
      }

      setBinaryValue(new HibernateIdentityObjectAttributeBinaryValue((byte[]) value));
    } else {
      throw new IllegalStateException("Type has not supported value or has not been set." + " Name=" + name + "; type=" + type);
    }
  }

  public Collection getValues() {
    if (type.equals(TYPE_TEXT)) {
      return Collections.unmodifiableSet(getTextValues());
    } else if (type.equals(TYPE_BINARY)) {
      Set vals = new HashSet();
      vals.add(getBinaryValue().getValue());
      return vals;
    } else {
      throw new IllegalStateException("Type has not supported value." + " Name=" + name + "; type=" + type);
    }
  }

  public int getSize() {
    if (type.equals(TYPE_TEXT)) {
      return getTextValues().size();
    } else if (type.equals(TYPE_BINARY)) {
      if (getBinaryValue() != null) {
        return 1;
      }
      return 0;
    } else {
      throw new IllegalStateException("Type has not supported value." + " Name=" + name + "; type=" + type);
    }
  }
}
