/*
 * 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
 *
 *     https://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.jdo.tck.pc.company;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.jdo.annotations.PersistenceCapable;
import org.apache.jdo.tck.util.DeepEquality;
import org.apache.jdo.tck.util.EqualityHelper;

/** This class represents a department within a company. */
@PersistenceCapable
public class Department
    implements IDepartment,
        Serializable,
        Comparable<IDepartment>,
        Comparator<IDepartment>,
        DeepEquality {

  private static final long serialVersionUID = 1L;

  public static final int RECOMMENDED_NO_OF_EMPS = 2;

  private long deptid;
  private String name;
  private Company company;
  private Employee employeeOfTheMonth;
  private transient Set<IEmployee> employees = new HashSet<>(); // element type is Employee
  private transient Set<IEmployee> fundedEmps = new HashSet<>(); // element type is Employee
  private transient List<IMeetingRoom> meetingRooms =
      new ArrayList<>(); // element type is MeetingRoom

  /**
   * This is the JDO-required no-args constructor. The TCK relies on this constructor for testing
   * PersistenceManager.newInstance(PCClass).
   */
  public Department() {}

  /**
   * Construct a <code>Department</code> instance.
   *
   * @param deptid The department id.
   * @param name The name of the department.
   */
  public Department(long deptid, String name) {
    this.deptid = deptid;
    this.name = name;
  }

  /**
   * Construct a <code>Department</code> instance.
   *
   * @param deptid The department id.
   * @param name The name of the department.
   * @param company The company that the department is associated with.
   */
  public Department(long deptid, String name, ICompany company) {
    this.deptid = deptid;
    this.name = name;
    this.company = (Company) company;
  }

  /**
   * Construct a <code>Department</code> instance.
   *
   * @param deptid The department id.
   * @param name The name of the department.
   * @param company The company that the department is associated with.
   * @param employeeOfTheMonth The employee of the month the department is associated with.
   */
  public Department(long deptid, String name, ICompany company, IEmployee employeeOfTheMonth) {
    this.deptid = deptid;
    this.name = name;
    this.company = (Company) company;
    this.employeeOfTheMonth = (Employee) employeeOfTheMonth;
  }

  /**
   * Set the id associated with this object.
   *
   * @param id the id.
   */
  public void setDeptid(long id) {
    if (this.deptid != 0) throw new IllegalStateException("Id is already set.");
    this.deptid = id;
  }

  /**
   * Get the department id.
   *
   * @return The department id.
   */
  public long getDeptid() {
    return deptid;
  }

  /**
   * Get the name of the department.
   *
   * @return The name of the department.
   */
  public String getName() {
    return name;
  }

  /**
   * Set the name of the department.
   *
   * @param name The name to set for the department.
   */
  public void setName(String name) {
    this.name = name;
  }

  /**
   * Get the company associated with the department.
   *
   * @return The company.
   */
  public ICompany getCompany() {
    return company;
  }

  /**
   * Set the company for the department.
   *
   * @param company The company to associate with the department.
   */
  public void setCompany(ICompany company) {
    this.company = (Company) company;
  }

  /**
   * Get the employee of the month associated with the department.
   *
   * @return The employee of the month.
   */
  public IEmployee getEmployeeOfTheMonth() {
    return employeeOfTheMonth;
  }

  /**
   * Set the employee of the month for the department.
   *
   * @param employeeOfTheMonth The employee of the month to associate with the department.
   */
  public void setEmployeeOfTheMonth(IEmployee employeeOfTheMonth) {
    this.employeeOfTheMonth = (Employee) employeeOfTheMonth;
  }

  /**
   * Get the employees in the department as an unmodifiable set.
   *
   * @return The set of employees in the department, as an unmodifiable set.
   */
  public Set<IEmployee> getEmployees() {
    return Collections.unmodifiableSet(employees);
  }

  /**
   * Add an employee to the department.
   *
   * @param emp The employee to add to the department.
   */
  public void addEmployee(Employee emp) {
    employees.add(emp);
  }

  /**
   * Remove an employee from the department.
   *
   * @param emp The employee to remove from the department.
   */
  public void removeEmployee(Employee emp) {
    employees.remove(emp);
  }

  /**
   * Set the employees to be in this department.
   *
   * @param employees The set of employees for this department.
   */
  public void setEmployees(Set<IEmployee> employees) {
    // workaround: create a new HashSet, because fostore does not
    // support LinkedHashSet
    this.employees = (employees != null) ? new HashSet<>(employees) : null;
  }

  /**
   * Get the funded employees in the department as an unmodifiable set.
   *
   * @return The set of funded employees in the department, as an unmodifiable set.
   */
  public Set<IEmployee> getFundedEmps() {
    return Collections.unmodifiableSet(fundedEmps);
  }

  /**
   * Add an employee to the collection of funded employees of this department.
   *
   * @param emp The employee to add to the department.
   */
  public void addFundedEmp(Employee emp) {
    fundedEmps.add(emp);
  }

  /**
   * Remove an employee from collection of funded employees of this department.
   *
   * @param emp The employee to remove from the department.
   */
  public void removeFundedEmp(Employee emp) {
    fundedEmps.remove(emp);
  }

  /**
   * Set the funded employees to be in this department.
   *
   * @param employees The set of funded employees for this department.
   */
  public void setFundedEmps(Set<IEmployee> employees) {
    // workaround: create a new HashSet, because fostore does not
    // support LinkedHashSet
    this.fundedEmps = (fundedEmps != null) ? new HashSet<>(employees) : null;
  }

  /**
   * Get the meeting rooms in the department as an unmodifiable list.
   *
   * @return List of meeting rooms in the department, as an unmodifiable list.
   */
  public List<IMeetingRoom> getMeetingRooms() {
    return Collections.unmodifiableList(meetingRooms);
  }

  /**
   * Add a meeting room to the department.
   *
   * @param room Meeting room to add to the department.
   */
  public void addMeetingRoom(MeetingRoom room) {
    meetingRooms.add(room);
  }

  /**
   * Remove a meeting room from the department.
   *
   * @param room Meeting room to remove from the department.
   */
  public void removeMeetingRoom(MeetingRoom room) {
    meetingRooms.remove(room);
  }

  /**
   * Set the rooms for this department.
   *
   * @param rooms The rooms for this department.
   */
  public void setMeetingRooms(List<IMeetingRoom> rooms) {
    this.meetingRooms = (rooms != null) ? new ArrayList<>(rooms) : null;
  }

  /**
   * Serialization support: initialize transient fields.
   *
   * @param in stream
   * @throws IOException error during reading
   * @throws ClassNotFoundException class could not be found
   */
  private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
    in.defaultReadObject();
    employees = new HashSet<>();
    fundedEmps = new HashSet<>();
    meetingRooms = new ArrayList<>();
  }

  /**
   * Returns <code>true</code> if all the fields of this instance are deep equal to the coresponding
   * fields of the other Department.
   *
   * @param other the object with which to compare.
   * @param helper EqualityHelper to keep track of instances that have already been processed.
   * @return <code>true</code> if all the fields are deep equal; <code>false</code> otherwise.
   * @throws ClassCastException if the specified instances' type prevents it from being compared to
   *     this instance.
   */
  public boolean deepCompareFields(Object other, EqualityHelper helper) {
    IDepartment otherDept = (IDepartment) other;
    String where = "Department<" + deptid + ">";
    return helper.equals(deptid, otherDept.getDeptid(), where + ".deptid")
        & helper.equals(name, otherDept.getName(), where + ".name")
        & helper.deepEquals(company, otherDept.getCompany(), where + ".company")
        & helper.deepEquals(
            employeeOfTheMonth, otherDept.getEmployeeOfTheMonth(), where + ".employeeOfTheMonth")
        & helper.deepEquals(employees, otherDept.getEmployees(), where + ".employees")
        & helper.deepEquals(fundedEmps, otherDept.getFundedEmps(), where + ".fundedEmps");
    // TODO Add meetingRooms to comparison
  }

  /**
   * Returns a String representation of a <code>Department</code> object.
   *
   * @return a String representation of a <code>Department</code> object.
   */
  public String toString() {
    return "Department(" + getFieldRepr() + ")";
  }

  /**
   * Returns a String representation of the non-relationship fields.
   *
   * @return a String representation of the non-relationship fields.
   */
  protected String getFieldRepr() {
    StringBuilder rc = new StringBuilder();
    rc.append(deptid);
    rc.append(", name ").append(name);
    return rc.toString();
  }

  /**
   * Compares this object with the specified Department object for order. Returns a negative
   * integer, zero, or a positive integer as this object is less than, equal to, or greater than the
   * specified object.
   *
   * @param other The Department object to be compared.
   * @return a negative integer, zero, or a positive integer as this object is less than, equal to,
   *     or greater than the specified Department object.
   */
  public int compareTo(IDepartment other) {
    return compare(this, other);
  }

  /**
   * Compares its two IDepartment arguments for order. Returns a negative integer, zero, or a
   * positive integer as the first argument is less than, equal to, or greater than the second.
   *
   * @param o1 the first IDepartment object to be compared.
   * @param o2 the second IDepartment object to be compared.
   * @return a negative integer, zero, or a positive integer as the first object is less than, equal
   *     to, or greater than the second object.
   */
  public int compare(IDepartment o1, IDepartment o2) {
    return EqualityHelper.compare(o1.getDeptid(), o2.getDeptid());
  }

  /**
   * Indicates whether some other object is "equal to" this one.
   *
   * @param obj the object with which to compare.
   * @return <code>true</code> if this object is the same as the obj argument; <code>false</code>
   *     otherwise.
   */
  public boolean equals(Object obj) {
    if (obj instanceof IDepartment) {
      return compareTo((IDepartment) obj) == 0;
    }
    return false;
  }

  /**
   * Returns a hash code value for the object.
   *
   * @return a hash code value for this object.
   */
  public int hashCode() {
    return (int) deptid;
  }

  /** The application identity class associated with the <code>Department</code> class. */
  public static class Oid implements Serializable, Comparable<Oid> {

    private static final long serialVersionUID = 1L;

    /**
     * This field represents the application identifier field for the <code>Department</code> class.
     * It must match in name and type with the field in the <code>Department</code> class.
     */
    public long deptid;

    /** The required public, no-arg constructor. */
    public Oid() {}

    /**
     * A constructor to initialize the identifier field.
     *
     * @param deptid the deptid of the Department.
     */
    public Oid(long deptid) {
      this.deptid = deptid;
    }

    public Oid(String s) {
      deptid = Long.parseLong(justTheId(s));
    }

    public String toString() {
      return this.getClass().getName() + ": " + deptid;
    }

    /** */
    public boolean equals(java.lang.Object obj) {
      if (obj == null || !this.getClass().equals(obj.getClass())) return (false);
      Oid o = (Oid) obj;
      if (this.deptid != o.deptid) return (false);
      return (true);
    }

    /** */
    public int hashCode() {
      return ((int) deptid);
    }

    protected static String justTheId(String str) {
      return str.substring(str.indexOf(':') + 1);
    }

    /** */
    public int compareTo(Oid obj) {
      return Long.compare(deptid, obj.deptid);
    }
  }
}