<?php
class Customer extends AppModel {

	var $name = 'Customer';
	var $validate = array(
		'id' => array('numeric'),
		'name' => array('notempty'),
	);

	var $belongsTo = array(
		'Statement',
		'PrimaryContact' => array(
			'className' => 'Contact',
		),
	);

	var $hasMany = array(
		'CurrentLease' => array(
			'className' => 'Lease',
			'conditions' => 'CurrentLease.close_date IS NULL',
		),
		'Lease',
		'LedgerEntry',

		// Cheat to get Account set as part of this class
		'Account',
	);

	var $hasAndBelongsToMany = array(
		'Contact',
		'Transaction' => array(
			'joinTable' => 'ledger_entries',
			'foreignKey' => 'customer_id',
			'associationForeignKey' => 'transaction_id',
		),
	);


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: accountId
   *  - Returns the account ID for the given customer
   */
  function accountId($id) {
    $this->cacheQueries = true;
    $item = $this->find('first',
			array('contain' => false,
			      'fields' => array('account_id'),
			      'conditions' => compact('id')));
    $this->cacheQueries = false;

    $item = current($item);
    return $item['account_id'];
  }

  function statementID($id) {
    $this->cacheQueries = true;
    $item = $this->find('first', array
			('recursive' => -1,
			 'conditions' => compact('id'),
			 ));
    $this->cacheQueries = false;

    $item = current($item);
    return $item['statement_id'];
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: leaseIds
   *  - Returns the lease IDs for the given customer
   */
  function leaseIds($id) {
    $this->cacheQueries = true;
    $customer = $this->find('first',
			    array('contain' =>
				  array('Lease' => array('fields' => array('id'))),
				  'fields' => array(),
				  'conditions' => array(array('Customer.id' => $id))));
    $this->cacheQueries = false;

    $ids = array();
    foreach ($customer['Lease'] AS $lease)
      $ids[] = $lease['id'];

    return $ids;
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: findSecurityDeposits
   *  - Returns an array of security deposit entries
   */
  function findSecurityDeposits($id, $link = null) {
    return $this->Statement->findEntriesRelatedToAccount
      ($this->statementId($id),
       $this->Account->securityDepositAccountID(),
       null, $link);
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: findUnreconciledLedgerEntries
   *  - Returns ledger entries that are not yet reconciled
   *    (such as charges not paid).
   */

  function findUnreconciledLedgerEntries($id = null, $fundamental_type = null) {
    $unreconciled = $this->Account->findUnreconciledLedgerEntries
      ($this->Account->accountReceivableAccountID(),
       $fundamental_type,
       array('LedgerEntry.customer_id' => $id));

    return $unreconciled;
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: reconcileNewLedgerEntry
   *  - Returns which ledger entries a new credit/debit would
   *    reconcile, and how much.
   *
   *  - REVISIT <AP> 20090617
   *    This should be subject to different algorithms, such
   *    as apply to oldest charges first, newest first, to fees
   *    before rent, etc.  Until we get there, I'll hardcode
   *    whatever algorithm is simplest.
   */

  function reconcileNewLedgerEntry($id, $fundamental_type, $amount) {
    $reconciled = $this->Account->reconcileNewLedgerEntry
      ($this->Account->accountReceivableAccountID(),
       $fundamental_type,
       $amount,
       array('LedgerEntry.customer_id' => $id));

    return $reconciled;
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: details
   *  - Returns detail information for the customer
   */

  function details($id = null) {
    // Query the DB for need information.
    $customer = $this->find
      ('first', array
       ('contain' => array
	(// Models
	 'Contact' =>
	 array(// Models
	       'ContactPhone',
	       'ContactEmail',
	       'ContactAddress',
	       ),
	 'Lease' =>
	 array('Unit' =>
	       array('order'  => array('sort_order'),
		     'fields' => array('id', 'name'),
		     ),
	       ),
	 ),

	'conditions' => array('Customer.id' => $id),
	));

    // Figure out the outstanding balance for this customer
    $customer['stats'] = $this->stats($id);

    // Figure out the total security deposit for the current lease.
    $customer['deposits'] = $this->findSecurityDeposits($id);

    return $customer;
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: stats
   *  - Returns summary data from the requested customer.
   */

  function stats($id = null, $cond = null, $link = null) {
    if (!$id)
      return null;

    return $this->Statement->stats($this->statementID($id), $cond, $link);
  }

}
?>