<?php

class UnitsController extends AppController {

  var $sidemenu_links =
    array(array('name' => 'Units',        'header' => true),
	  array('name' => 'Occupied',     'url' => array('controller' => 'units', 'action' => 'occupied')),
	  array('name' => 'Vacant',       'url' => array('controller' => 'units', 'action' => 'vacant')),
	  array('name' => 'Unavailable',  'url' => array('controller' => 'units', 'action' => 'unavailable')),
	  array('name' => 'All',          'url' => array('controller' => 'units', 'action' => 'all')),
	  );


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * override: sideMenuLinks
   *  - Generates controller specific links for the side menu
   */
  function sideMenuLinks() {
    return array_merge(parent::sideMenuLinks(), $this->sidemenu_links);
  }

  
  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: index / unavailable / vacant / occupied / all
   *  - Generate a listing of units
   */

  function index()       { $this->all(); }
  function unavailable() { $this->gridView('Unavailable Units'); }
  function vacant()      { $this->gridView('Vacant Units'); }
  function occupied()    { $this->gridView('Occupied Units'); }
  function all()         { $this->gridView('All Units', 'all'); }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * virtuals: gridData
   *  - With the application controller handling the gridData action,
   *    these virtual functions ensure that the correct data is passed
   *    to jqGrid.
   */

  function gridDataSetup(&$params) {
    parent::gridDataSetup($params);
    if (!isset($params['action']))
      $params['action'] = 'all';
  }

  function gridDataCountTables(&$params, &$model) {
    $link = array
      ('link' =>
       array(// Models
	     'UnitSize' => array('fields' => array('id', 'name')),
	     ),
       );

    if ($params['action'] === 'occupied')
      $link['Lease'] = array('fields' => array(),
			     // Models
			     'Contact' => array('fields' => array('display_name'),
						//'type' => 'LEFT',
						),
			     );

    return $link;
  }

  function gridDataTables(&$params, &$model) {
    $link = $this->gridDataCountTables($params, $model);
    $link['link']['CurrentLease']['LedgerEntry'] = array('fields' => array());
    $link['link']['CurrentLease']['LedgerEntry']['Ledger'] = array('fields' => array());
    $link['link']['CurrentLease']['LedgerEntry']['Ledger']['Account'] = array('fields' => array());
    // INNER JOIN would be great, as it would ensure we're only looking
    // at the ledger entries that we truly want.  However, this also
    // removes from the query any leases that do not yet have a ledger
    // entry in A/R.  A solution would be to INNER JOIN these tables,
    // and LEFT JOIN it to the rest.  Grouping of JOINs, however, is
    // implemented with the 'joins' tag, and is not available through
    // the Linkable behavior interface.
    //$link['link']['CurrentLease']['LedgerEntry']['Ledger']['Account']['type'] = 'INNER';
    $link['link']['CurrentLease']['LedgerEntry']['Ledger']['Account']['conditions']
      = array('Account.id' =>
	      $this->Unit->CurrentLease->LedgerEntry->Ledger->Account->accountReceivableAccountID());
    return $link;
  }

  function gridDataFields(&$params, &$model) {
    $db = &$model->getDataSource();
    $fields = $db->fields($model, $model->alias);
    $fields[] = ("SUM(IF(Account.id IS NULL, 0," .
		 "       IF(LedgerEntry.debit_ledger_id = Account.id," .
		 "          1, -1))" .
		 "    * LedgerEntry.amount) AS 'balance'");
    return $fields;
  }

  function gridDataConditions(&$params, &$model) {
    $conditions = parent::gridDataConditions($params, $model);

    if ($params['action'] === 'unavailable') {
      $conditions[] = $this->Unit->conditionUnavailable();
    }
    elseif ($params['action'] === 'vacant') {
      $conditions[] = $this->Unit->conditionVacant();
    }
    elseif ($params['action'] === 'occupied') {
      $conditions[] = $this->Unit->conditionOccupied();
    }
    elseif ($params['action'] === 'unoccupied') {
      $conditions[] = array('NOT' => array($this->Unit->conditionOccupied()));
    }

    return $conditions;
  }

  function gridDataOrder(&$params, &$model, $index, $direction) {
    // Instead of sorting by name, sort by defined order
    if ($index === 'Unit.name')
      $index = 'Unit.sort_order';

    $order = array();
    $order[] = parent::gridDataOrder($params, $model, $index, $direction);

    // If sorting by anything other than name (defined order)
    // add the sort-order as a secondary condition
    if ($index !== 'Unit.name')
      $order[] = parent::gridDataOrder($params, $model,
					 'Unit.sort_order', $direction);

    return $order;
  }

  function gridDataPostProcessLinks(&$params, &$model, &$records, $links) {
    $links['Unit'] = array('name');
    $links['UnitSize'] = array('name');
    return parent::gridDataPostProcessLinks($params, $model, $records, $links);
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: move_in
   *  - Sets up the move-in page for the given unit.
   */

  function move_in($id = null) {
    $customer = array();
    $unit = array();

    if (isset($id)) {
      $this->Unit->recursive = -1;
      $unit = current($this->Unit->read(null, $id));
    }

    $title = 'Unit Move-In';
    $this->set(compact('customer', 'unit', 'title'));
    $this->render('/leases/move');
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: move_out
   *  - prepare or execute a move out on a specific lease
   */

  function move_out($id) {

    $unit = $this->Unit->find
      ('first', array
       ('contain' => array
	(// Models
	 'CurrentLease' =>
	 array(//'conditions' => array('Lease.moveout_date' => null),
	       // Models
	       'Customer' =>
	       array('fields' => array('id', 'name'),
		     ),
	       ),
	 ),
	'conditions' => array('Unit.id' => $id),
	));
    $this->set('customer', $unit['CurrentLease']['Customer']);
    $this->set('unit',     $unit['Unit']);
    $this->set('lease',    $unit['CurrentLease']);

    $redirect = array('controller' => 'units',
		      'action' => 'view',
		      $id);

    $title = ('Lease #' . $unit['CurrentLease']['number'] . ': ' .
	      $unit['Unit']['name'] . ': ' .
	      $unit['CurrentLease']['Customer']['name'] . ': Prepare Move-Out');
    $this->set(compact('title', 'redirect'));
    $this->render('/leases/move');
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: view
   *  - Displays information about a specific unit
   */

  function view($id = null) {
    if (!$id) {
      $this->Session->setFlash(__('Invalid Item.', true));
      $this->redirect(array('action'=>''));
    }

    $unit = $this->Unit->find
      ('first',
       array('contain' =>
	     array(// Models
		    'UnitSize',
		    'Lease' => array('Customer'),
		    'CurrentLease' => array('Customer')
		   ),
	     'conditions' => array('Unit.id' => $id),
	     ));

    // Get the balance on each lease.
    foreach ($unit['Lease'] AS &$lease) {
      $stats = $this->Unit->Lease->stats($lease['id']);
      $lease['balance'] = $stats['balance'];
    }

    $outstanding_balance = 0;
    $outstanding_deposit = 0;
    if (isset($unit['CurrentLease']['id'])) {
      // Figure out the outstanding balance of the current lease.
      $stats = $this->Unit->stats($id);
      $outstanding_balance =
	$stats['CurrentLease']['balance'];

      // Figure out the total security deposit for the current lease.
      $deposits = $this->Unit->Lease->findSecurityDeposits($unit['CurrentLease']['id']);
      $outstanding_deposit = $deposits['summary']['balance'];
    }

    // Set up dynamic menu items
    $this->sidemenu_links[] =
      array('name' => 'Operations', 'header' => true);

    if (isset($unit['CurrentLease']['id']) &&
	!isset($unit['CurrentLease']['moveout_date'])) {
      $this->sidemenu_links[] =
	array('name' => 'Move-Out', 'url' => array('action' => 'move_out',
						   $id));
    } else {
      $this->sidemenu_links[] =
	array('name' => 'Move-In', 'url' => array('action' => 'move_in',
						   $id));
    }

    if (isset($unit['CurrentLease']['id']) &&
	!isset($unit['CurrentLease']['close_date'])) {
      $this->sidemenu_links[] =
	array('name' => 'Payment', 'url' => array('controller' => 'customers',
						  'action' => 'receipt',
						  $unit['CurrentLease']['customer_id']));
    }

    // Prepare to render.
    $title = 'Unit ' . $unit['Unit']['name'];
    $this->set(compact('unit', 'title',
		       'outstanding_balance',
		       'outstanding_deposit'));
  }
}