<?php
class Customer extends AppModel {

	var $name = 'Customer';
	var $validate = array(
		'id' => array('numeric'),
		'name' => array('notempty'),
	);

	var $belongsTo = array(
		'Account',
		'PrimaryContact' => array(
			'className' => 'Contact',
		),
	);

	var $hasMany = array(
		'CurrentLease' => array(
			'className' => 'Lease',
			'conditions' => 'CurrentLease.close_date IS NULL',
		),
		'Lease',
		'Transaction',
	);

	var $hasAndBelongsToMany = array(
		'Contact',
	);


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: accountId
   *  - Returns the account ID for the given customer
   */
  function accountId($id) {
    $this->cacheQueries = true;
    $customer = $this->find('first',
			    array('contain' => false,
				  'fields' => array('account_id'),
				  'conditions' => array(array('Customer.id' => $id))));
    $this->cacheQueries = false;

    return $customer['Customer']['account_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) {
/*     pr(array('function' => 'Customer::findSecurityDeposits', */
/* 	     'args' => compact('id', 'link'), */
/* 	     )); */

    $entries = $this->Account->findLedgerEntriesRelatedToAccount
      ($this->accountId($id),
       $this->Account->securityDepositAccountID(),
       true, null, $link);

    foreach ($this->leaseIds($id) AS $lease_id) {
      $ledger_entries = $this->Lease->findSecurityDeposits($lease_id, $link);
      $this->statsMerge($entries['summary'], $ledger_entries['summary']);
      $entries['Entries'] = array_merge($entries['Entries'],
					$ledger_entries['Entries']);
    }

/*     pr(array('function' => 'Customer::findSecurityDeposits', */
/* 	     'args' => compact('id', 'link'), */
/* 	     'vars' => compact('customer'), */
/* 	     'return' => compact('entries'), */
/* 	     )); */

    return $entries;
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * 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->accountId($id), $fundamental_type);

    foreach ($this->leaseIds($id) AS $lease_id) {
      $unrec = $this->Lease->findUnreconciledLedgerEntries($lease_id,
							   $fundamental_type);

      foreach (array_keys($unreconciled) AS $type) {
	$left  = &$unreconciled[$type];
	$right = &$unrec[$type];

	$left['entry']    = array_merge($left['entry'], $right['entry']);
	$left['balance'] += $right['balance'];
      }
    }

    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->accountId($id), $fundamental_type, $amount);

    foreach ($this->leaseIds($id) AS $lease_id) {
      foreach (array_keys($reconciled) AS $type) {
	$rec = $this->Lease->reconcileNewLedgerEntry($lease_id,
						     $fundamental_type,
						     $reconciled[$type]['unapplied']);

	$left  = &$reconciled[$type];
	$right = &$rec[$type];

	$left['entry']      = array_merge($left['entry'], $right['entry']);
	$left['balance']   += $right['balance'];
	$left['applied']   += $right['applied'];
	$left['unapplied']  = $right['unapplied'];
      }
    }

    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',
	       ),
	 'Account',
	 'Lease' =>
	 array('Unit' =>
	       array('order'  => array('sort_order'),
		     'fields' => array('id', 'name'),
		     ),
	       ),
	 ),

	'conditions' => array('Customer.id' => $id),
	));

    // Add the lease balance to each lease.
    foreach ($customer['Lease'] AS &$lease) {
      $stats = $this->Lease->stats($lease['id']);
      $lease['balance'] = $stats['Account']['Ledger']['balance'];
    }

    // Figure out the outstanding balance of the current lease.
    $customer['stats'] = $this->stats($id);

    // Figure out the total security deposit for the current lease.
    $customer['deposits'] = $this->findSecurityDeposits($id);

    // Add statistics into the customer account.
    $customer['Account'] = array_merge($customer['Account'],
				       $customer['stats']['Account']['Ledger']);

    return $customer;
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: stats
   *  - Returns summary data from the requested customer.
   */

  function stats($id = null) {
    if (!$id)
      return null;

    // Get the basic information necessary
    $customer = $this->find('first',
			    array('contain' =>
				  array('Account' => array
					('fields' => array('Account.id')),

					'Lease'   => array
					('fields' => array('Lease.id'))
					),
				  'conditions' => array
				  (array('Customer.id' => $id))));

    // Get stats from the customer account, and each lease
    $stats['Account'] = $this->Account->stats($customer['Account']['id']);
    foreach ($customer['Lease'] AS $lease) {
      $this->statsMerge($stats['Lease'], $this->Lease->stats($lease['id']));
    }

    // Merge the stats from both the customer specific account, as
    // well as the leases.  This will provide current customer standing.
    $this->statsMerge($stats, $stats['Account']['Ledger']);
    $this->statsMerge($stats, $stats['Lease']['Account']['Ledger']);

    return $stats;
  }

}
?>