<?php
class Unit extends AppModel {

	var $name = 'Unit';
	var $validate = array(
		'id' => array('numeric'),
		'unit_size_id' => array('numeric'),
		'name' => array('notempty'),
		'sort_order' => array('numeric'),
		'walk_order' => array('numeric'),
		'deposit' => array('money'),
		'amount' => array('money')
	);

	var $belongsTo = array(
		'UnitSize',
	);

	var $hasOne = array(
		'CurrentLease' => array(
			'className' => 'Lease',
			'conditions' => 'CurrentLease.moveout_date IS NULL',
		),
	);

	var $hasMany = array(
		'Lease',
	);

  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * helpers: status enumerations
   */

  function statusEnums() {
    static $status_enums;
    if (!isset($status_enums))
      $status_enums = $this->getEnumValues('status');
    return $status_enums;
  }

  function statusValue($enum) {
    $enums = $this->statusEnums();
    return $enums[$enum];
  }

  function occupiedEnumValue() {
    return statusValue('OCCUPIED');
  }

  function conditionOccupied() {
    return ('Unit.status >= ' . $this->statusValue('OCCUPIED'));
  }

  function conditionVacant() {
    return ('Unit.status BETWEEN ' .
      ($this->statusValue('UNAVAILABLE')+1) .
      ' AND ' .
      ($this->statusValue('OCCUPIED')-1));
  }

  function conditionUnavailable() {
    return ('Unit.status <= ' . $this->statusValue('UNAVAILABLE'));
  }

  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: updateStatus
   *  - Update the given unit to the given status
   */
  function updateStatus($id, $status) {
    $this->id = $id;
    //pr(compact('id', 'status'));
    $this->saveField('status', $status);
  }

  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: stats
   *  - Returns summary data from the requested customer.
   */

  function stats($id = null) {
    if (!$id)
      return null;

    // Get the basic information necessary
    $unit = $this->find('first',
			array('contain' => array
			      ('Lease' => array
			       ('fields' => array('Lease.id')),

			       'CurrentLease' => array
			       ('fields' => array('CurrentLease.id'))),

			      'conditions' => array
			      (array('Unit.id' => $id)),
			      ));

    // Get the stats for the current lease
    $stats['CurrentLease'] = $this->Lease->stats($unit['CurrentLease']['id']);

    // Sum the stats for all leases together
    foreach ($unit['Lease'] AS $lease) {
      $this->statsMerge($stats['Lease'], $this->Lease->stats($lease['id']));
    }

    // Return the collection
    return $stats;
  }

}